KR101831059B1 - End shield system and electromotive drive having an end shield system - Google Patents

End shield system and electromotive drive having an end shield system Download PDF

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KR101831059B1
KR101831059B1 KR1020160072437A KR20160072437A KR101831059B1 KR 101831059 B1 KR101831059 B1 KR 101831059B1 KR 1020160072437 A KR1020160072437 A KR 1020160072437A KR 20160072437 A KR20160072437 A KR 20160072437A KR 101831059 B1 KR101831059 B1 KR 101831059B1
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South Korea
Prior art keywords
end shield
opening
contact
contact pin
housing
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KR1020160072437A
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Korean (ko)
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KR20160146571A (en
Inventor
막시밀리안 크노프
올리베르 하우프트
도미니크 펜텐
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브로제 파르초이크타일레 게엠베하 운트 코. 콤만디트게젤샤프트 뷔르츠부르크
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Application filed by 브로제 파르초이크타일레 게엠베하 운트 코. 콤만디트게젤샤프트 뷔르츠부르크 filed Critical 브로제 파르초이크타일레 게엠베하 운트 코. 콤만디트게젤샤프트 뷔르츠부르크
Publication of KR20160146571A publication Critical patent/KR20160146571A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates

Abstract

The present invention relates to an end shield system for an electric drive unit (3). The end shield system includes an end shield (2) having at least one opening (12) for receiving an assembly device and / or at least one opening (15) through which a contact pin (18) passes; And an insulating element (13) disposed on one side of the end shield (2), wherein the insulating element (13) closes at least one opening (12) And / or the insulating element 13 is configured to close the opening 15 through which the contact pin 18 passes, and the insulating element 13 is configured such that the contact pin 18 is closed And a duct (17) through which the opening (15) passes.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an end shield system,

The present invention relates to an end shield system for an electric drive system and to an electric drive system having such an end shield system.

In an EPS (electric power steering) motor and an electronic control unit (ECU), an electronic control unit (ECU) is attached to the B side, i.e., the non-output side in most cases. Also, contact generally occurs on such side. The two components are not usually or often sealed to each other on such side. In principle, the two components have different requirements in terms of cleanliness and residual dust, and the motor components have proven to be less sensitive to particle size. A problem with the conventional concept is that the openings of the end shields necessary to handle the components during the assembly process can enable the particles to enter the electronic control unit (ECU).

Conventional end shields are deep drawn mandrels or aluminum die castings. Along with the use of aluminum or forced housings, additional safety factors have been required because the interference fit has been found to have a different strength at different temperature levels. Simple steel deep drawing is not only particularly advantageous from a cost point of view but also suitable for accommodating ball bearings. On the other hand, the aluminum die-cast shield is advantageous when additional functions such as flanges are incorporated. Aluminum die cast parts usually require mechanical finishing and are relatively expensive.

In addition, DE 10 2008 013 402 A1 discloses an electric machine for a hybrid vehicle having a rotor disposed rotatably on an end shield by a stator and roller bearings disposed in a housing. The end shield has a receiving portion configured to receive a bowl-shaped bearing attachment portion on the rotor side. The bearing attachment portion also receives the roller bearing. A carrier portion which is adjacent to the housing portion of the end shield and which is joined to the attachment portion on the housing side is provided. At least one metal sleeve is embedded in the fiber-reinforced composite material within the attachment so that the end shield can be attached by screwing to the housing or the flange of the housing.

In view of the foregoing, it is an object of the present invention to provide an improved end shield or end shield system for an electric drive system.

This object is achieved by an end shield system having the features of claim 1 and / or an electric drive apparatus having the features of claim 11 according to the invention.

According to this, there is provided an end shield system for an electric drive system,

An end shield having at least one opening through which at least one opening and / or contact pin for receiving the assembly device passes, and an insulating element disposed at one side of the end shield, wherein the insulating element comprises at least And / or the insulating element is configured to close at least one opening through which the contact pin passes, wherein the insulating element is configured to close the contact pin And a duct through which the openings are passed.

This end shield system is characterized in that special openings through which the contact pins of the assembling device, for example a special opening for the insertion of a gripper and the stator of the motor-driven device, pass, can not pass undesirable dust particles, The electronic control unit (ECU) disposed in front of the end shield and the stator and the rotor of the electric drive device provided at the rear of the end shield can be closed so as not to be contaminated. On the other hand, the insulating element may also allow the end shield to be simultaneously gripped by the assembly device through the opening closed by the insulating element, or may be brought into contact after the contact pin has passed through the associated opening closed by the insulating element. In addition, the end shield can be fabricated, for example, as a metal sheet or as a die-cast part, while at the same time the opening of the end shield provides a simple and economical way to prevent dust from passing through without damaging the operating mode of the end shield Can be closed.

The knowledge / idea on which the present invention is based is based on the fact that during the assembly process it is possible to handle the end shield and to close the opening of the end shield necessary for electrical contact but the handling and contact of the end shield is still possible, To prevent them from passing.

Advantageous embodiments and improvements will become apparent from additional dependent claims and the detailed description together with the drawings.

In an embodiment according to the invention, the insulating element is formed to have recesses below the opening for receiving the assembly device. This recess may be provided with at least one undercut or without an undercut depending on the assembling device used. As the assembling device, for example, a gripper or any suitable conveying and / or positioning device can be used. The recess in the insulating element has the advantage that on the one hand it covers and closes the opening to prevent it from passing first. On the other hand, gripping by, for example, a gripper in the form of an assembly device is still possible through recesses in the opening of the end shield, so that handling of the end shield is still possible.

In another embodiment according to the present invention, the insulating element has a contact dome that closes at least one opening, the contact dome having at least one duct through which the contact pin passes. Due to the contact dome received in the opening and the closing of the opening by the contact dome so that the dust can no longer pass through the opening, the contact of the contact pin can be ensured while preventing the passage of dust.

According to an embodiment of the invention, the contact dome may be provided with, for example, a flat contact pin, in particular a slotted opening through which the flat strip conductor can pass, and / or a cylindrical contact pin, An opening is provided. However, the present invention is not limited to the slot-like and cylindrical openings through which the contact pin can pass. The openings may be of any shape suitable for allowing the associated contact pin to be in electrical contact with the contact pin on the outlet side of the contact dome through the contact dome.

In an embodiment according to the present invention, the contact dome is formed with an opening having a catch and guide geometry. The catch-guiding geometry of the opening is configured to receive the contact pin at the entrance side of the contact dome or to thread the contact pin, while the engagement pin is configured to be threaded at a predetermined or predetermined final position on the exit side of the contact dome And is preferably configured to hold, fix or support the contact pin in its final position. The catch-guiding geometry of the duct in the contact dome simplifies assembly by allowing the contact pin to easily slide into the duct and automatically exit the contact dome at a defined location.

In another embodiment according to the present invention, the catch-guiding geometry of the opening is configured as a tapered opening, which tapers in at least one portion from the entrance side of the contact dome in the longitudinal direction of the opening. Due to the widened area of the opening at the entrance side of the contact dome, the contact pins can be easily worn, thereby simplifying assembly. As the opening tapers in the longitudinal direction toward the outlet side of the contact dome, the contact pin can pass through the contact dome in a targeted manner. The opening and the duct having the catch-guiding geometry may be configured to have, for example, a bevel, or a conical portion having an adjacent cylindrical portion, or may be conically shaped as a catch-guide geometry, Is not limited to the above-described example.

In another embodiment according to the present invention, the insulating element may be injection molded or attached to the end shield, or may be formed as a plastic material part, especially as a fiber-reinforced plastic material part, with the end shield, and / (affixing). The insulating element and / or the end shield may be made of a plastic material, a fiber-reinforced plastic material, a sheet metal or a cast metal. The end shield and the insulating element can be integrally formed, for example, from the same plastic material or a fiber-reinforced plastic material, for example, as an injection molded article.

According to an embodiment of the present invention, an end shield made of a plastic material or a fiber-reinforced plastic material has an annular element on its outer periphery. In this case, the annular element may be made of, for example, a metal or a metal alloy.

In another embodiment according to the present invention, the annular element has a coefficient of thermal expansion equal to that of the housing in which the end shield is housed, or a thermal expansion coefficient as close as possible to the thermal expansion coefficient of the housing in which the end shield is housed. This has the advantage that no additional fixing elements are required or can be reduced to axially secure the end shield to the housing of the electric drive at all temperature levels that occur during operation of the electric drive. The housing may be made of, for example, a plastic material, and the plastic material may be reinforced with a fiber. Likewise, the housing may be made of a metal or a metal alloy. Basically, the housing may be fabricated as a metal-plastic material housing by a combination of a plastic material including a fiber-reinforced plastic material and a metal including a metal alloy. In the case of a metal-plastic material housing, the annular element has a coefficient of thermal expansion equal to the area of the housing in which the annular element will be received and to which the annular element will come into contact, or has a coefficient of thermal expansion as close as possible to that area of the housing.

In an embodiment according to the invention, the annular element on the outer periphery of the end shield is housed in at least one mount and / or injection molded or attached to the end shield. The mount may be configured as a groove or a step, for example, and the present invention is not limited to such an example.

In another embodiment according to the present invention, there is provided an electric drive system comprising a housing with a rotor and a stator, wherein the rotor shaft of the rotor is mounted in an end shield system housed in a housing. In this case, the stator has at least one contact pin, which has guide means for inserting the contact pin into the duct in the contact dome of the end shield system. The guiding means has the advantage that the contact pin can be held or guided and also can be prevented from undesirably twisting.

According to an embodiment of the present invention, the guiding means is arranged such that the contact pin can be inserted into the duct and arranged at a final position in the contact dome to correspond to the contour of the duct in the contact dome to contact the contact pin at the outlet side of the contact dome . The guiding means, together with the ducts of the contact dome, also have the advantage of forming plug-in joints which can simplify assembly.

In another embodiment according to the invention, the guiding means may be conical and / or cylindrical, for example, so that it can be received in a corresponding conical and / or cylindrical form of the duct of the contact dome.

According to another embodiment of the invention, the end shield is press fit or shrink in the housing. The end shield provided with the annular element is press-fitted or contracted into the housing, for example, by an annular element on its outer periphery. In this case, it is possible to omit fixing the end shield in the axial direction by an additional fixing element.

The embodiments and improvements described above may be combined together as desired, where appropriate. Further possible embodiments, improvements and embodiments of the present invention include combinations not expressly mentioned, which have been described above and in which the features of the invention are described below with respect to the embodiments. In particular, one of ordinary skill in the art may add individual aspects as improvements or additions to the relevant basic form of the invention.

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings.
1 is a sectional view of a housing in which a rotor and a stator of an end shield, an electric drive unit, and the like are disposed according to an embodiment of the present invention.
2 is a perspective view of the end shield according to Fig.
3 is a perspective view of an end shield system according to an embodiment of the present invention.
Figure 4 is a cross-sectional view taken along line AA of the end shield system according to Figure 3;
5 is a perspective view of an end shield system according to an embodiment of the present invention as viewed from the front when the contact pins of the stator are housed in the contact dome of the end shield system.
6 is a perspective view of an end shield system according to another embodiment of the present invention, viewed from the rear side or the motor side.
Fig. 7 is a cross-sectional view showing a stator having a contact pin having an end shield system and guiding means according to Fig. 6, in which the contact pin is inserted into an associated contact pin of the end shield system;
Fig. 8 shows the end shield system and the stator according to Fig. 7 with the contact pins fully inserted into the contact dome of the end shield system.
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are included to provide a better understanding of embodiments of the invention. The drawings illustrate embodiments and, together with the description, serve to explain the principles and concepts of the present invention. Other embodiments as well as the various advantages described above will become apparent from the drawings. The elements in the figures are not necessarily drawn to scale.
In the various figures, identical, functionally equivalent, or functionally equivalent elements, features, and elements are designated with the same reference numerals, unless otherwise indicated.

The present invention and the problems solved therefrom can be applied to any motor-shaft unit, but hereinafter will be described in more detail with reference to a motor-driven driving device of an automobile.

BACKGROUND ART [0002] Motor-driven devices such as an AC motor and a DC motor usually include an end shield for accommodating bearings. In this regard, it should be understood that the end shield is intended to mean the front and / or rear cover of the housing of the motor-driven drive, which in particular protects the interior of the motor and accommodates bearings of the motor shaft, respectively.

1 is a sectional view of a housing 1 and an end shield according to an embodiment of the invention accommodated therein. In Fig. 1, the position of the electric drive unit 3 is shown in broken lines only in a schematic and very simplified manner together with the rotor 4 and the stator 5. 2 is a perspective view of the end shield 2 according to Fig.

1, the end shield 2 is provided with a bearing mount 6 for bearing on the opposite side of the motor, that is, on the front side, for mounting the rotor shaft 27 of the rotor 4 forming the motor shaft Respectively. The rotor 4 is configured as an internal rotor and is disposed inside the stator 5 while being separated by an air gap. Further, the motor is in contact with, for example, an electronic control unit (ECU) indicated by a dotted line on the motor side, that is, on the back side of the end shield 2. The contact of the control unit (ECU) 28 occurs on the illustrated side as an empty space.

In the embodiment shown in Figures 1 and 2, the end shield 2 is made of a plastic material, and in other embodiments the plastic material can also be reinforced with fibers. For example, in this case, the end shield 2 can be manufactured as a plastic material injection molded article or as a fiber-reinforced plastic injection molded article. In addition, on the outer periphery of the end shield 2 or on the outer diameter thereof, it is preferable that it has a thermal expansion coefficient equal to that of the material of the housing 1 or the housing 1 thereof or that the coefficient of thermal expansion of the housing 1 or the material of the housing 1 An additional annular element 8 with an approximate thermal expansion coefficient is provided. The housing 1 can be formed, for example, as a metal housing made of a metal or a metal alloy as its material. Likewise, the housing 1 may be formed as a plastic material housing made of a plastic material or a fiber-reinforced plastic material as its material.

In addition, a metal-plastic material housing is also possible, in which case the housing is made of a combination of a metal, including a metal alloy, and a plastic material, including a fiber-reinforced plastic material. In the case of a metal-plastic material housing, the annular element has the same coefficient of thermal expansion as that of the portion of the housing in which the annular element is to be received and into which the annular element will come into contact, or has a coefficient of thermal expansion as close as possible to that portion of the housing. For example, when the annular element is in contact with the plastic material portion of the housing in an assembled state, the coefficient of thermal expansion of the annular element is equal to or at least as close as possible to the coefficient of thermal expansion of that plastic material portion. This applies to all embodiments of the present invention. However, the present invention is not limited to a metal housing, a plastic material housing or a metal-plastic material housing, but may be made of any other material suitable for the housing 1 of the electric drive apparatus or any other material combination.

The annular element 8 can be formed as a metallic annular element made of, for example, a metal or a metal alloy, and can have the same coefficient of thermal expansion as that of the housing 1 or the material of the housing 1, It has a coefficient of thermal expansion as close as possible to the coefficient. This has the advantage that no additional fixing elements are required for axially fixing the end shield 2 to the housing 1 at all the temperature levels that occur during operation of the electric drive 3. However, in principle, additional axial locking elements may be provided, although this is not necessary.

As in the embodiment shown in Figures 1 and 2, the end shield 2 can be configured to have on its outer periphery 7 at least one mount 9 that receives the annular element 8. The mount 9 may, for example, be used as a step 10 at least partly enclosing an annular element as shown in the embodiment of Fig. 1, or as an annular element 8, At least partially enclosed and configured as a recess or groove (11) adapted to receive the annular element. In this respect, the annular element 8 forms a snug fit with the housing 1, in particular a press fit.

In addition, the annular element 8 can additionally or alternatively be added to or extruded into the outer periphery 7 of the end shield 2. In this case, it is not necessary to provide at least one additional mount 9 of a recessed shape such as the stepped portion 10 or the groove 11. However, at least one additional mount 9 may be provided. The present invention is not limited to the above-described example for fastening the annular element 8 to the outer peripheral portion 7 of the end shield 2. Any type of fastening means or a combination of fastening means for fastening the annular element 8 to the end shield 2 may be provided.

In the sectional view of the housing 1 and the end shield system shown very schematically in Fig. 1, interference fit is provided between the housing 1 and the annular element 8 of the end shield 2 received in the housing. If the materials of the housing 1 and the annular element 8 are mated with a thermal expansion coefficient as close as possible, the end shield 2 can be prevented from loosening in the housing 1 unintentionally due to temperature fluctuations .

By forming the end shield 2, for example, as a plastic material injection molded article or a fiber-reinforced plastic material injection molded article, unlike, for example, a deep drawing end shield, a high degree of flexibility in a geometric shape and a correspondingly large A design freedom degree can be provided. The shaping of this type of plastic material end shield 2 can be varied so that its contour can be implemented with or without flange or flanged mounting lugs. Flange or flange mounting lugs (not shown) may be integrated into the housing 1, for example, and used as an interface to the steering system, and the like. If the flange or flange mounting lugs are not integrated into the housing, the flange or flange mounting lugs may be integrated into the end shield (not shown). In this case, the housing functions only as, for example, a bearing for the rotor and a housing portion for housing the stator.

In addition, commercial benefits associated with material cost and production cost can be achieved. Thus, depending on the particular application, unlike aluminum die-cast parts, a machine finishing process is generally not required for plastic injection molded parts. Depending on the particular application, for example, the narrow tolerances that can be obtained in plastic material injection molding can be sufficiently precise to allow parts to be produced off-the-job without finishing. The attenuation characteristics of plastic or fiber-reinforced plastic materials, as well as the precision of the components, provide advantages in terms of structural inherent noise of the motor and enable optimized vibration behavior. In addition, the plastic material or the fiber-reinforced plastic material injection molded article is lightweight, resulting in weight reduction of the electric drive apparatus.

Unlike conventional plastic material end shields, which require additional fixing elements due to the coefficient of thermal expansion, in the end shield 2 according to the invention, an additional annular element 8 on its outer diameter or outer periphery 7 is provided in the housing 1 or It is provided with the same thermal expansion coefficient as that of the material of the housing 1 or with a thermal expansion coefficient as close as possible to the housing or the housing material.

The end shield 2 described with reference to Figs. 1 and 2 may also be provided with an insulating element, thereby forming an end shield system as described in more detail below with reference to Figs. 3-8. have.

FIG. 3 is a perspective view of an end shield system according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line A-A of the end shield system according to FIG. The end shield may be made of, for example, a basic conductive material, and in the case of the present example, it is, for example, a deep drawing force end shield.

As shown in FIG. 3, the end shield system includes an end shield 2 having at least one opening 12 for inserting an assembly device, such as a gripper. The assembly device is engaged through the opening 12 during the assembly process, for example from the opposite side of the end shield 2 or from the motor side thereof. The assembling device, for example a gripper, grasps the end shield 2 and places it in the associated housing 1, for example as shown previously for example in Fig. In this regard, the end shield 2 has a bearing mount 6 for the bearing to mount the motor shaft on its front side or on the opposite side of the motor. The motor is connected to, for example, an electronic control unit (ECU) on the side of the end shield 2 facing the motor or on the back side of the end shield. Contact with the electronic control unit (ECU) is made at the opening side of the housing.

The dust particles can pass through the opening 12 of the end shield 2, which is undesirable. In order to prevent this, an additional insulating element 13 is provided as shown in Figs. This insulating element 13 is intended to cover the opening 12 on the one hand to prevent dust from penetrating and on the other hand to allow the assembly device such as a gripper or other transport and / or positioning device to grip the end shield 2 . Here, the insulating element 12 is provided on the motor side or back side of the end shield 2 or on the opposite side or the front side of the end shield 2 to form an end shield system.

As shown in the embodiment of Figures 3 and 4, the insulating element 13 has a suitable recess 14 in the area of the opening 12 in the end shield 2, Is configured to be capable of inserting an assembling device (not shown) such as a gripper into the opening 12 and holding the end shield 2 with the assembling device. At the same time, the recess 14 of the insulating element 13 closes the opening 12 particularly fully, preventing dust from passing through the opening 12 to the motor side or back side and vice versa. In this way, it is possible to easily prevent unwanted contamination of electronic devices such as an electronic control unit (ECU) and a motor due to the passage of dust particles from the motor to the electronic control unit (ECU) and vice versa. In addition, for example, in combination with the suction process, the contact point with the consumer-side electronic control unit (ECU) can be maintained without dangerous particles.

In the embodiment shown in Figures 3 and 4, the recess 14 covering the opening 12 is formed without an undercut. However, in other embodiments (not shown), the specific recess may be formed to have at least one additional undercut, depending on the function and use. For example, gripping of the end shield 12 by an assembling device such as an appropriate gripper or other transport and positioning device can be further improved by such undercut.

3 and 4, an opening 15 is provided in the end shield 2 so that the contact pin passes through the end shield 2. This type of contact pin may be configured as a flat strip conductor, for example, or may be wire-like or cylindrical as shown in FIG. 5 below. However, the present invention is not limited to the above-described example of the shape of the contact pin.

The insulating element 13 may be provided with an additional contact dome 16 which closes the opening 15 while passing the contact pin. This particular contact dome 16 has one or more ducts 17 for one or more contact pins while closing the associated opening 15 of the end shield 2 particularly substantially completely so that any dust particles 15). Thanks to the insulating element 13, the cleanliness requirement from the consumer can be met more easily. With this concept, it is possible to focus only on the dust particles outside the motor. The cleanliness requirement in the motor can be adapted to that motor.

The insulating element 13 may be injection molded into the end shield 2, for example, made of polyamide (PA) or other suitable plastic material or combination of plastic materials, for example as a plastic material part, added to the end shield 2 , And / or be attachable thereto. As described above, the insulating element 13 is fixed to the end shield 2 at the motor side or the back side as shown in Figs. 4 and 5, or at the opposite side or the front side of the end shield 2 . Optionally, one or more handling geometries (not shown) may also be mounted to the insulating element 13, and / or one or more guide geometries (not shown) for consumer contacts may be provided on the insulating element 13 Can be integrated. The handling geometry should be understood as a component that is used specifically to grasp or capture a part. The guide geometry for the contacts is also used as a guide for engagement and / or as a mount for the corresponding plug element.

In the embodiment of Figures 3 and 4, the end shield 2 is a metal sheet, such as a steel sheet, for example, which is deep drawn or otherwise produced by a suitable process. Likewise, the end shield 2 can also be fabricated as cast parts or plastic material parts, such as aluminum cast parts. In the case of a plastic material part, the end shield may be formed as a fiber-reinforced plastic material part. When the end shield is formed as a plastic material part or a fiber-reinforced plastic material part, additional annular elements may be provided on the outer periphery thereof as described above with reference to Figs. In this regard, the end shield 2 may be formed as a separate component as shown in Figs. 3 and 4, or may be integrally formed with the insulating element 13, for example, as an injection molded article. To avoid unnecessary repetition, reference will be made to the embodiments of Figs. 1 and 2 with respect to the construction of the end shield 2 with annular elements.

5 and 6 are perspective views of another embodiment of the end shield system 2 according to the present invention, Fig. 5 shows the end shield system 2 viewed from the front side, Fig. 6 shows the end shield system 2 seen from the motor side or back side An end shield system 2 is shown. Figs. 7 and 8 also show the detailed configuration of the end shield system 2 according to Figs. 5 and 6 with the contact pin 18 inserted.

The contact units of the EPS motor are rigidly connected to the stator or stator assembly. Thus, the positional accuracy of the contact pins forming the electrical interface depends on a very long tolerance chain with respect to the orientation characteristics on the housing. In particular, the radius and tangential position or angular position of the contact pin can vary significantly.

The end shield system 2 shown in Figs. 5 to 8 according to the embodiment of the present invention is similar to the end shield system 2 shown in Figs. 3 and 4 according to another embodiment of the present invention, ). The contact dome 16 passes through the associated opening 15 of the end shield 2 and preferably also closes the opening 15 like the contact dome 16 of the second embodiment, Lt; / RTI > The contact dome 16 of the insulating element 13 has one or more ducts 17 through which the contact pins 18 are respectively passed.

According to a second embodiment of the present invention as shown in Figs. 3 and 4, the duct 17 of the contact dome 16 has a slot shape such that, for example, a contact pin in the form of a flat strip conductor passes therethrough. Likewise, the duct 17 may also be configured as cylindrical to allow wire-like or cylindrical contact fins 18 to pass, as shown in Fig.

5 to 8, the duct of the contact dome 16 may receive or catch the contact pin 18, or may be connected to the contact pin 18. [ Guide geometry (19) adapted to guide the contact pin (18) to a predetermined final position or contact position while being threaded. Also, the dome 16 and the duct 17 maintain or support the contact pin 18 in a final position for subsequent contact.

5 to 8, the end shield system including the end shield 2 is formed to have the insulation element 13 in the same manner as the above-described end shield system including the end shields in Figs. 4 and 5 . The contact dome 16 may be formed on the insulating element 13, which may be injection molded, attached or added to the end shield 2, for example, as described above with reference to Figures 3 and 4, or may be integrally formed of the same material . With regard to the construction of the insulating element 13 and the closing of the opening 12 of the end shield 2 by the associated recess 14 of the insulating element 13, in order to avoid unnecessary repetition, .

6, 7 and 8, the special duct 17 of the contact dome 18 has a tapered opening 20 as the catch-and-guide geometry 19, and the tapered opening 20 Extends from the inlet side 21 of the contact dome 16 into which the contact pin 18 is inserted or spanned to the outlet side 22 through which the contact pin 18 exits the contact dome 16, . This has the advantage that it is possible to simplify the insertion of the contact pin 18 while ensuring that the contact pin 18 gradually comes out of the predetermined or predetermined position in the dome 16 or makes electrical contact.

The duct may be configured as a continuous conical opening, for example. In addition, the duct 17 also has an opening 22 having a conical or conical portion 23 of the inlet side 21 and a cylindrical portion 24 adjacent thereto, as shown by way of example in the cross-sectional views of Figures 7 and 8 . Likewise, the opening may be partly cylindrical, and at least one additional bevel in its longitudinal direction may be provided, starting from the inlet side 21 and extending over at least a part of its length . However, the present invention is not limited to the above-mentioned geometric shape of the duct but may be modified such that the contact pin 18 is inserted at the inlet side 21 of the contact dome 16 and the outlet end 22 of the contact dome 16 Any geometric shape that can facilitate the process of guiding the pin 18 to a predetermined final position may be provided.

7 and 8, in the embodiment of the present invention, the guide means 25 may also be provided on the contact pin 18 of the stator 5 or the stator unit. The guide means 25 of the contact pin 18 is configured to insert the contact pin 18 into the contact dome 16 provided in the end shield 2. [ The shape of the guide means 25 is adapted to suitably correspond to the shape of the opening 22 or the duct 17 of the contact dome 16 so that it can be inserted into the opening 22 of the contact dome 16. [ 7 and 8, the guiding means 25 is received in the conical or conical portion 23 of the duct 17 of the contact dome 16 and, optionally, Or conical shape. The guide means 25 form a clearance fit or a transition fit with the inner wall of the duct 17 or a part of the inner wall of the duct 17, So that the position tolerance can be limited.

7 shows the contact pin 8 at the position where the contact dome 16 is being inserted into the duct 17, together with the guide means 25. Figure 8 also shows the contact pin 28 at the final position within the dome 16.

The guide means 25 may optionally be configured to hold or support the contact pins 18 in a predetermined orientation, for example in the longitudinal direction of the stator 5 or the stator unit. The guide means 25 may be disposed on the cover or housing of the stator 5 or the stator unit and may be formed, for example, by injection molding or addition thereto, or formed as an injection molded part therewith, And may be part of the wiring unit 26 of the stator 5 as in the illustrated embodiment. However, the present invention is not limited to such an example.

The contact pin 18 and the contact dome 16 form a contact unit, which is also an interface to the ECU at the same time. In this respect, the wiring unit according to the invention has considerably greater flexibility in the tangential and radial directions. At the time of assembling the motor, after the stator 5 is inserted into the housing as an assembly, the end shield 2 is assembled. This end shield 2 can be inserted relatively accurately into the motor housing.

According to an embodiment of the present invention, as shown in Figs. 5-8, the end shield 2, at which the contact end or fin 8 will protrude from the end, There is provided an insulating element 13 having the above-described catch-and-guide geometry 19 for catching the contact pin 18 and guiding it to a predetermined final position.

The duct 17 in the contact dome 16 of the insulating element 13 is preferably dimensioned or fitted to fit the contact pin 18 to be guided therethrough so that the contact pin 18 is inserted into the duct 17, It does not allow, or at least substantially prevents, dust particles or the like from passing through the duct 17 after reaching the final position in the contact dome 16. [ This applies to all embodiments of the present invention.

Embodiments for calibrating the position of the contact pin 18 by the catch-guide geometry 19 in the duct 17 of the contact dome 16 can be applied to various types of contact pins. As described above, the contact pins are, for example, flat strip conductors, which can be formed, for example, as insulation displacement (ID) connectors or as skinners, for example as a vertical skinner. Can be used.

The contact unit can improve the position tolerance of the consumer interface to the electronic control unit (ECU). In addition, due to the contours of the catch-and-guide geometry, the quality of the wire guidance and the binding force acting on the end shield and contact unit can be influenced.

Other preferred embodiments of the present invention as shown in Figures 1 and 2 include the following.

1. An end shield for an electric drive unit (3), the end shield being made of a plastic material or a fiber-reinforced plastic material and having an annular element on its outer periphery, the annular element (8) Which has the same thermal expansion coefficient as the housing (1) to be accommodated or has a thermal expansion coefficient as close as possible to the thermal expansion coefficient of the housing (1) in which the end shield (2) is housed.

2. In the embodiment 1 above, the annular element 8 on the outer periphery 7 of the end shield 2 is accommodated in at least one mount 9 and / or injection molded or attached to the end shield 2 , And the mount (9) is in particular constituted as a groove (11) or a step (10).

3. The end shield for an electric drive system as in the embodiment 1 or 2, wherein the annular element 8 is a metal ring, a plastic material ring, and / or a metal-plastic material ring.

4. In the embodiment 1, 2 or 3 above, the end shield 2 includes at least one opening 12 for receiving the assembly device and / or at least one opening 15 through which the contact pin 18 passes And an end shield for an electric drive unit.

5. The method of embodiment 4 wherein an insulating element 13 is disposed on one side of the end shield 2 and the insulating element 13 closes at least one opening 12 for receiving the assembly device, And / or the insulating element 13 is configured to close the opening 15 through which the contact pin 18 passes, and the insulating element 13 is configured to close the contact 15, And a duct (17) through which the pin (18) passes through the closed aperture (15).

6. The method of embodiment 5 wherein the insulating element 13 has a recess 14 below the opening 12 for closing the aperture 12 and receiving the assembly device and the recess 14 having at least one Wherein the end shield is formed with an undercut or without an undercut.

7. The electrical connector according to any one of the preceding claims 5 or 6, wherein the insulating element (13) has a contact dome (16) closing the opening (15), wherein the at least one contact pin And an opening (20) in the form of a duct (17) in the form of a duct (17).

8. In the above-mentioned seventh embodiment, the opening 20 of the contact dome 16 has a slot shape so that a flat contact pin, in particular a flat strip conductor, passes through it, or the opening 20 has a cylindrical contact pin, And is configured as a cylindrical opening in the contact dome (16) for passage therethrough.

9. The apparatus as in any of the embodiments 7 or 8 wherein the opening 20 is configured to have a catch-and-guide geometry 19 and the opening 20 having a catch- To the predetermined final position at the outlet side 22 of the contact dome 16 so as to receive or contact the contact pin 18 at the inlet side of the contact dome 16 and to contact the contact pin 18. [ And is preferably configured to hold or fix the contact pin there. ≪ RTI ID = 0.0 > [0002] < / RTI >

10. The method of embodiment 9 wherein the catch-and-guide geometry 19 of the opening 20 is configured as a tapered portion of the opening 20 and the opening 20 is defined by the inlet side 21 of the contact dome 16 The geometry of the catch-guide geometry 19 of the opening 20 is particularly tapered in at least one portion thereof in the longitudinal direction from the conical or conical portion 24 with the adjacent cylindrical portion 24, (23), or has a conical shape.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited thereto. The above-described embodiments, particularly their individual features, can be combined.

1: Housing
2: End shield
3: Electric drive device
4: Rotor
5:
6: Bearing mount
7:
8: Annular element
9: Mount
10: stepped portion
11: Home
12: Opening (for assembling device)
13: Insulation element
14: recess
15: Opening (for contact pins)
16: Contact dome
17: Duct
18: Contact pin
19: catch-guide geometry
20: aperture
21: inlet side
22: Exit side
23: conical portion
24: cylindrical portion
25: Guide means
26: Wiring unit
27: Rotor shaft
28: ECU

Claims (19)

An end shield system for an electric drive unit (3) comprising:
An end shield (2) having at least one opening (15) through which at least one opening (12) or contact pin (18) for receiving the assembly device passes; And
The insulating element 13 disposed on one side of the end shield 2,
, Wherein the insulating element (13) is configured to close the at least one opening (12) receiving the assembly device to allow the assembly device to be received in the closed opening (12) 13 are configured to close the opening 15 through which the contact pin 18 passes and the insulation element 13 is connected to the duct 17 through which the contact pin 18 passes through the opening 15 And an end shield system for an electric drive unit. 2. The assembly of claim 1, wherein the insulating element (13) has a recess (14) below the opening (12) for closing the opening (12) Wherein the end shield is configured to have one undercut or no undercut. 3. A connector according to claim 1 or 2, characterized in that the insulating element (13) has a contact dome (16) for closing the opening (15), the contact dome (16) comprising at least one contact pin And an opening (20) in the form of a duct (17) passing therethrough. The contact dome (16) according to claim 3, wherein the opening (20) of the contact dome (16) has a slot shape for allowing a flat contact pin to pass therethrough, Wherein the end shield is configured as a cylindrical opening. 4. The apparatus of claim 3, wherein the opening (20) is configured to have a catch and guide geometry (19), the opening (20) having the catch-guide geometry (19) (22) of the contact dome (16) so as to receive the contact pin (18) at the entrance side of the contact dome (16) or to thread the contact pin and to contact the contact pin ) To a predetermined final position in the end shield system. 6. A method as claimed in claim 5, characterized in that the catch-guide geometry (19) of the opening (20) is configured as a tapered portion of the opening (20) 21) in at least one portion thereof in the longitudinal direction thereof. 3. Insulation element according to claim 1 or 2, characterized in that the insulation element (13) is injection molded, attached to the end shield (2), integrally formed with the end shield with a plastic material, ), And the insulating element (13) or the end shield (2) is made of a plastic material, a fiber-reinforced plastic material, a sheet metal or a cast metal. The end shield (2) according to any one of the preceding claims, wherein the end shield (2) made of a plastic material or a fiber reinforced plastic material has an annular element (8) on its outer periphery (7) system. 9. The end shield (2) according to claim 8, characterized in that the annular element (8) has a thermal expansion coefficient equal to that of the housing (1) in which the end shield (2) Wherein said end shield system has an approximate thermal expansion coefficient. 9. An end shield according to claim 8, characterized in that said annular element (8) on the outer periphery (7) of said end shield (2) is either received in at least one mount (9) End shield system for drives. An electric drive unit (3) having a housing (1), comprising:
A rotor (4) and a stator (5), wherein the rotor shaft of the rotor (4) is mounted on the end shield system according to claim 1, wherein the end shield system comprises an electric motor drive. 12. The end shield system of claim 11, wherein the stator (5) has at least one contact pin (18) which contacts the contact pin (18) And a guide means (25) for inserting into the opening (20). 13. A device according to claim 12, characterized in that the guide means (25) are arranged such that the contact pin (18) can be inserted into or seated in the opening (20) Of the opening (20) in the contact dome (16). 13. An electric drive system according to claim 12, wherein said guide means (25) is conical, conical or cylindrical. 13. The electric drive system according to claim 11 or 12, wherein the end shield (2) of the end shield system is press-fitted into the housing (1). 7. A device according to claim 6, characterized in that the catch-guiding geometry (19) of the opening (20) is formed as a bevel or as a conical or conical part (23) with an adjacent cylindrical part (24) The end shield system for an electric drive system. 10. An end shield for an electric drive system as claimed in claim 9, characterized in that the housing (1) is a metal housing, a plastic material housing or a metal-plastic material housing (1) system. 11. The end shield system for an electric drive system according to claim 10, wherein the mount (9) is configured as a groove (11) or a step (10). 16. An electric drive system according to claim 15, wherein the end shield (2) is press-fitted or contracted into the housing (1) by means of an annular element (8) on its outer periphery (7).
KR1020160072437A 2015-06-12 2016-06-10 End shield system and electromotive drive having an end shield system KR101831059B1 (en)

Applications Claiming Priority (2)

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DE102015210788.4A DE102015210788A1 (en) 2015-06-12 2015-06-12 Bearing shield system and electric motor drive with a bearing shield system
DE102015210788.4 2015-06-12

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KR101831059B1 true KR101831059B1 (en) 2018-02-21

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DE102015210788A1 (en) 2016-12-15
CN106253539A (en) 2016-12-21

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