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WO2025119479A1 - Dispositif et système de mise en contact d'arbre - Google Patents

Dispositif et système de mise en contact d'arbre Download PDF

Info

Publication number
WO2025119479A1
WO2025119479A1 PCT/EP2023/084733 EP2023084733W WO2025119479A1 WO 2025119479 A1 WO2025119479 A1 WO 2025119479A1 EP 2023084733 W EP2023084733 W EP 2023084733W WO 2025119479 A1 WO2025119479 A1 WO 2025119479A1
Authority
WO
WIPO (PCT)
Prior art keywords
carbon brush
contacting device
brush
force
projection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2023/084733
Other languages
German (de)
English (en)
Inventor
Edgar Boschert
Florian Nettinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/EP2023/084733 priority Critical patent/WO2025119479A1/fr
Publication of WO2025119479A1 publication Critical patent/WO2025119479A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/38—Brush holders
    • H01R39/381—Brush holders characterised by the application of pressure to brush
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/38—Brush holders
    • H01R39/40—Brush holders enabling brush movement within holder during current collection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/40—Structural association with grounding devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/10—Connectors or connections adapted for particular applications for dynamoelectric machines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/38—Brush holders
    • H01R39/385—Means for mechanical fixation of the brush holder

Definitions

  • Electric motors have a rotating motor shaft. To ensure that the commutation of the electric motor is carried out correctly, it is possible, for example in a two-pole design, to attach at least two conductive contact surfaces to the motor shaft. These contact surfaces are connected to the coils of the electric motor.
  • At least two shaft contact devices are used, which are arranged in a fixed position relative to the motor shaft. Since the rotation of the motor shaft does not allow a fixed connection to the motor shaft, a sliding connection is used.
  • a shaft contact device predominantly uses a carbon brush, which is pressed in a brush guide toward the motor shaft by a spring. If only a single-pole connection is to be established, e.g., for grounding the motor shaft, a single shaft contact device is sufficient.
  • this functionality has proven itself, the manufacturing process is not trivial. As long as the shaft contact device is not in mechanical contact with the motor shaft, the spring pushes the carbon brush out of the brush guide, making assembly of the shaft contact device difficult.
  • the object is achieved by a shaft contacting device for electrically contacting a conductor with a motor shaft, the shaft contacting device comprising a carbon brush which is held displaceably in a brush guide along a working direction in order to contact the motor shaft with a contact side of the carbon brush, and a spring which is designed to apply a compressive force to the carbon brush in the direction of the working direction, wherein the brush guide has a holding projection, and wherein the carbon brush has a holding recess corresponding to the holding projection and an engagement of the holding projection in the holding recess blocks a displacement of the carbon brush in the working direction in an assembly position, wherein the brush guide is designed such that a force acting on the carbon brush from the release side of the brush guide can lift the holding recess above the holding projection and thus release the displacement of the carbon brush in the working direction.
  • a special feature of this shaft contact device is that the carbon brush is held in the brush guide almost until assembly is completed and is only released in the final step by the assembly process itself. Specifically, the carbon brush only shifts in the working direction when it is actually positioned against the motor shaft. The shaft contact device achieves locking of the carbon brush without the need for any additional component. No additional or separate release process is required, as the release can be achieved simply during assembly. [0007] A further special feature of some embodiments is that the force acting on the carbon brush is generated during the assembly process. This prevents accidental release or triggering of the carbon brush, as could occur, for example, if a locking device were accidentally removed.
  • the retaining projection can easily be arranged in the distal half of the carbon brush, i.e., the half that does not have the contact side, or even at the distal end, i.e., the end opposite the proximal contact side.
  • the retaining projection extends, in particular, from a release side of the brush guide transversely to the working direction toward the carbon brush.
  • the brush guide has an opening on its release side which is designed to allow the passage of a trigger projection which exerts the force on the carbon brush.
  • This design provides a defined opening through which the release projection can exert the force on the carbon brush. If the opening is selected to be small, accidental release of the carbon brush can be effectively prevented.
  • the opening can, in particular, be circular.
  • the force acting on the carbon brush is parallel to a normal vector of the mounting surface.
  • the force acting on the carbon brush is at an angle to a normal vector of the mounting surface, in particular at an angle of at least approximately 90°.
  • the first force vector generated during the assembly process is not the same as the second force vector acting on the carbon brush, even if the first force vector is the cause of the second force vector.
  • the force vectors can differ in direction and/or magnitude.
  • a force emanating from the mounting surface is converted into the force acting on the carbon brush via a force conversion element.
  • the force emanating from the mounting surface is described as a first force vector, and the force acting on the carbon brush is described as a second force vector.
  • the force vectors can differ in direction and/or magnitude.
  • the force conversion element can be designed, in particular, as a deflection element, rocker, lever, or pivoting element.
  • the brush guide has a spring side opposite the release side, which is freely resilient in a rear region opposite the retaining projection.
  • the brush guide has a slot-shaped recess on a spring side opposite the release side, through which an electrical conductor contacted to the carbon brush is guided to the outside.
  • This design allows for easy contact between the carbon brush and an electrical component of the electric motor.
  • the slot-shaped recess allows that the carbon brush can move freely, even if the conductor is led outwards.
  • the brush guide has a second holding projection in addition to the said first holding projection and the carbon brush has a second holding recess in addition to the said first holding recess.
  • each of the two retaining projections can be somewhat smaller, particularly in terms of its height, while still providing a secure hold like a single, larger retaining projection.
  • a particularly symmetrical arrangement of the two retaining projections, relative to a longitudinal axis of the carbon brush in the working direction, can enable a well-controlled transition from the mounting position to the release position.
  • the carbon brush has an inclined surface which is arranged such that the force acts on the inclined surface and there develops a first force component in the working direction and a second force component perpendicular to the working direction.
  • the inclined surface is arranged, in particular, between two retaining recesses.
  • the inclined surface has an inclination of between 10° and 70°, preferably between 15° and 50°, and particularly preferably between 25° and 35°, relative to the working direction.
  • the brush guide forms a U-shape in side view.
  • the side view shows the side of the brush guide, with the viewing direction in the side view being perpendicular to the viewing direction in the top view.
  • the upper leg of the II i.e., the leg remote from the release side, is particularly designed to be resilient.
  • the brush guide forms a U-shape in plan view.
  • the spring side of the brush guide is visible in the plan view, with the viewing direction in the plan view being perpendicular to the viewing direction in the side view.
  • the brush guide has a mounting side which is designed to be fixed on a mounting surface.
  • the mounting side may coincide with the release side.
  • the mounting side may also be at an angle to the release side, in particular at an angle of at least approximately 90°.
  • the object is achieved in that the brush guide has a flexible tongue on the release side, which in the mounting position projects outwards beyond the release side and has a trigger projection at its free end, wherein the trigger projection is designed to exert the force acting on the carbon brush when the trigger projection is pressed in a triggering direction in the direction of the carbon brush by fixing the brush guide on the mounting surface.
  • the mechanism for releasing the carbon brush is combined with the shaft contacting device.
  • the force exerted by the release side of the The force acting on the carbon brush from the brush guide is transferred to the carbon brush via the release projection. Since the flexible tongue protrudes outwards beyond the release side in the mounted position, but is pressed into the plane of the release side when placed on the mounting surface, the tongue presses the release projection against the carbon brush. The resulting force lifts the holding recess above the holding projection and thus releases the carbon brush to move in the working direction.
  • only the release projection of the tongue can protrude outwards beyond the release side and/or at least part of the tongue.
  • the release projection extends in particular transversely to the working direction of the carbon brush.
  • the object is achieved by a system with a housing and a previously described shaft contacting device, wherein the housing has a mounting surface on which the shaft contacting device can be mounted or is mounted, wherein the housing has a release projection in the region of the mounting surface, where a mounting side of the brush guide comes to rest, which is designed so that when the shaft contacting device is fixed on the mounting surface, the release projection presses against the carbon brush, lifts the holding recess above the holding projection and thus releases the displacement of the carbon brush in the working direction.
  • This variant uses a mounting surface on which a release projection is arranged.
  • This release projection interacts with the shaft contacting device in such a way that, when the shaft contacting device is correctly mounted, the release projection exerts the force on the carbon brush.
  • This variant provides additional safety to the assembly process, since if the shaft contacting device is incorrectly positioned, the release projection cannot release the carbon brush. This applies in particular if the brush guide has an opening on its release side that is designed to allow the release projection to penetrate, and only in the area of the opening.
  • the object is achieved by a system comprising a housing and a previously described shaft contacting device with flexible tongue, wherein the housing has a mounting surface on which the shaft contacting device is or can be mounted.
  • a housing with a release projection is not required. It is sufficient to provide a mounting surface that, when the shaft contacting device is mounted on the mounting surface, presses the tongue, in particular the release projection, so that the force is exerted against the carbon brush.
  • Fig. 1 shows a first embodiment of the wave contacting device in perspective view
  • Fig. 2 shows the first embodiment of the shaft contacting device in plan view
  • Fig. 3 shows the first embodiment of the shaft contacting device in sections A-A and B-B from Fig. 2;
  • Fig. 4 shows a second embodiment of the wave contacting device in perspective view
  • Fig. 5 shows the second embodiment of the shaft contacting device in plan view
  • Fig. 6 shows the second embodiment of the shaft contacting device in sections AA and BB from Fig. 5;
  • Fig. 7 shows a third embodiment of the wave contacting device in perspective view;
  • Fig. 8 shows the third embodiment of the shaft contacting device in a view from the front
  • Fig. 9 shows the third embodiment of the shaft contacting device in sections A-A and B-B from Fig. 8;
  • Fig. 10 shows a fourth embodiment of the wave contacting device in perspective view
  • Fig. 11 shows the fourth embodiment of the wave contacting device in a view from the front
  • Fig. 12 shows the fourth embodiment of the shaft contacting device in a side view
  • Fig. 13 shows the fourth embodiment of the shaft contacting device in sections A-A and B-B from Fig. 12;
  • FIG. 1 together with Figs. 2 and 3, shows a first embodiment of a shaft contacting device 10 for electrically contacting a conductor 12 with a motor shaft (not shown).
  • the motor shaft not shown here, is located in this embodiment on the rear side of the shaft contacting device 10, facing away from the viewer. Together with the housing 2, the shaft contacting device 10 forms a system 1.
  • the shaft contacting device 10 has a carbon brush 14, which is held displaceably in a brush guide 16 along a working direction 18 in order to contact the motor shaft with a contact side 20 of the carbon brush 14.
  • the shaft contacting device 10 also has a spring 22, which is symbolically referred to here as Roller spring is shown and is designed to apply a compressive force to the carbon brush 14 in the direction of the working direction 18.
  • the brush guide 16 has a retaining projection 24 which extends from a release side 26 of the brush guide 16 transversely to the working direction 18 to the carbon brush 14.
  • a release direction 28 is shown, along which the retaining projection 24 extends from the release side 26 transversely to the working direction 18.
  • the carbon brush 14 has a retaining recess 30 corresponding to the retaining projection 24. Interlocking of the retaining projection 24 with the retaining recess 30 prevents displacement of the carbon brush 14 in the working direction 18 in an assembly position. This assembly position is shown here.
  • the brush guide 16 is designed such that a force F acting on the carbon brush 14 from a release side 26 of the brush guide 16 can lift the holding recess 30 over the holding projection 24 and thus release the displacement of the carbon brush 14 in the working direction 18.
  • the brush guide 16 has an opening 31 on the release side 26, which is designed to allow the passage of a trigger projection 32, which exerts the force F on the carbon brush 14.
  • the force F acting on the carbon brush 14 is parallel to a normal vector 34 of a mounting surface 36 of the shaft contacting device 10.
  • a mounting side 52 of the brush guide 16 or of the shaft contacting device 10 lies at least substantially flat on the mounting surface 36, so that the normal vector 34 of the mounting surface 36 is at least substantially parallel to a normal vector of the mounting side 52.
  • the brush guide 16 has a flexible tongue 38 which, in the illustrated assembly position, projects outwardly beyond the release side 26 and which has the release projection 32 at its free end, which extends transversely to the working direction 18 of the carbon brush 14.
  • the release projection 32 is designed to Carbon brush 14 acting force F when the trigger projection 32 is pressed in the direction of the carbon brush 14 in a triggering direction, which here corresponds at least approximately to the triggering direction 28, by fixing the brush guide 16 or the shaft contacting device 10 on the mounting surface 36.
  • the brush guide 16 has a spring side 42 opposite the release side 26, which is freely resilient in a rear region opposite the retaining projection 24.
  • the resilient property is achieved here by a longitudinal slot 44 on each of the two sides of the brush guide 16, wherein each longitudinal slot 44 extends completely into the rear region opposite the retaining projection 24.
  • the two sides of the brush guide 16 Similar to the brush guide 16 having a U-shape when viewed from the spring side 42, the two sides of the brush guide 16 have a U-shape.
  • the brush guide 16 can have an elastic upper side or spring side 42 made of an elastic material. It is also possible for there to be some air between the upper side of the brush guide 16 and the carbon brush 14, so that the carbon brush 14 can be lifted within the brush guide 16 toward the upper side.
  • the brush guide 16 has a second retaining projection (hidden here) in addition to the aforementioned first retaining projection 24. Accordingly, the carbon brush 14 has a second retaining recess (hidden here) in addition to the aforementioned first retaining recess 28.
  • the shaft contacting device 10 functions as follows.
  • the shaft contacting device 10 is placed with the release side 26 onto the mounting surface 36. This creates a force F, which in turn acts on the release projection 32, which is resiliently held on the flexible tongue 38.
  • the trigger projection 32 is in contact or comes into contact with the carbon brush 14, so that the force F now acts on the carbon brush 14 approximately in the direction of the trigger direction 28. This, in turn, causes the carbon brush 14 to now shift approximately in the direction of the trigger direction 28. This leads to the retaining recess 30 being lifted above the retaining projection 24.
  • the carbon brush 14 has an inclined surface 50 arranged such that the force F acts on the inclined surface, where it exerts a first force component in the working direction 18 and a second force component perpendicular to the working direction 18, i.e., along the triggering direction 28.
  • the second force component lifts the retaining recess 30 above the retaining projection 24.
  • the first force component acts in the working direction 18 and thus supports the spring 18 during the release or triggering process. This can be particularly helpful when, since the carbon brush 14 is pressed against the spring side 42, the frictional resistance increases due to the increased surface pressure between the carbon brush 14 and the spring side 42, and therefore a force greater than the force intended to be provided by the spring 22 during normal operation may be required.
  • FIG. 4 shows, together with Fig. 5 and Fig. 6, a second embodiment of a wave contacting device 10 for electrically contacting a conductor 12 with a motor shaft (not shown).
  • the second embodiment is similar to the first embodiment except for the differences described below. The details described for the first embodiment are therefore not repeated here.
  • the reference numerals already introduced are retained for identical or functionally similar components, even if they are not shown again.
  • the housing 2 again has the mounting surface 36 on which the shaft contacting device 10 is mounted.
  • the housing 2 has the release projection 32, which is designed so that when the shaft contacting device 10 is fixed to the mounting surface 36, the release projection 32 presses against the carbon brush 14, lifts the retaining recess 30 above the retaining projection 24, and thus releases the displacement of the carbon brush 14 in the working direction 18.
  • FIG. 7, together with Figs. 8 and 9, shows a third embodiment of a shaft contacting device 10 for electrically contacting a conductor 12 with a motor shaft (not shown).
  • the third embodiment is similar to the first embodiment except for the differences described below. The details described for the first embodiment will therefore not be repeated here.
  • the reference numerals already introduced are retained for identical or functionally similar components, even if they are not shown again.
  • the carbon brush 14 is triggered here from the side, specifically from the release side 26.
  • the flexible tongue 38 is actuated by applying a force F using a finger or a tool.
  • the force F acting on the carbon brush 14 is at an angle to a normal vector of the mounting side 52, here in particular at an angle of at least approximately 90°.
  • Fig. 10, together with Fig. 11, Fig. 12 and Fig. 13, shows a fourth embodiment of a shaft contacting device 10 for electrically contacting a conductor 12 with a motor shaft (not shown).
  • the fourth embodiment is similar to the third embodiment except for the differences described below.
  • the details described for the first embodiment and the third embodiment will therefore not be repeated here.
  • the reference numerals already introduced are retained for identical or functionally similar components, even if they are not shown again.
  • the housing 2 again has the mounting surface 36 on which the shaft contacting device 10 is or will be mounted.
  • a force emanating from the mounting surface 36 is converted via a force conversion element 54 into the force F acting on the carbon brush.
  • the force conversion element 54 has an inclined run-up surface 56, which is inclined to the normal vector 34 of the mounting surface 36.
  • the shaft contacting device 10 When the shaft contacting device 10 is placed on the mounting surface 36, it first assumes a defined position relative to the force conversion element 54 through an opening 58 in a base plate 60 of the shaft contacting device 10. Such a defined position can also be achieved in other ways, e.g., by projections on the shaft contacting device 10 that engage in recesses in the mounting surface 36; positioning elements independent of the force conversion element 54 can also be used.
  • the inclined run-up surface 56 hits the flexible tongue 38 and pushes it successively in the release direction 28 until the holding recess 30 is lifted over the holding projection 24 and thus the displacement of the carbon brush 14 in the working direction 18 is released.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

L'invention concerne un dispositif de mise en contact d'arbre (10) comportant un balai de carbone (14), qui est maintenu dans un guide de balai (16) de manière à être mobile le long d'une direction de travail (18) afin d'amener un côté de contact (20) du balai de carbone (14) en contact avec l'arbre de moteur, et un ressort (22). Le guide de balai (16) comporte une saillie de maintien (24), et le balai de carbone (14) comporte un évidement de maintien (30) qui correspond à la saillie de maintien (24), une mise en prise de la saillie de maintien (24) dans l'évidement de maintien (30) bloquant un mouvement de balai de carbone (14) dans la direction de travail (18) dans une position installée. Le guide de balai (16) est conçu de sorte qu'une force (F) exercée sur le balai de carbone (14) depuis le côté de dégagement (26) du guide de balai (16) peut soulever l'évidement de maintien (30) par-dessus la saillie de maintien (24), permettant ainsi un mouvement du balai de carbone (14) dans la direction de travail (18). L'invention concerne en outre un système (1) comprenant un boîtier (2) et un dispositif de mise en contact d'arbre (10).
PCT/EP2023/084733 2023-12-07 2023-12-07 Dispositif et système de mise en contact d'arbre Pending WO2025119479A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2023/084733 WO2025119479A1 (fr) 2023-12-07 2023-12-07 Dispositif et système de mise en contact d'arbre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2023/084733 WO2025119479A1 (fr) 2023-12-07 2023-12-07 Dispositif et système de mise en contact d'arbre

Publications (1)

Publication Number Publication Date
WO2025119479A1 true WO2025119479A1 (fr) 2025-06-12

Family

ID=89222873

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/084733 Pending WO2025119479A1 (fr) 2023-12-07 2023-12-07 Dispositif et système de mise en contact d'arbre

Country Status (1)

Country Link
WO (1) WO2025119479A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328683A1 (de) * 1983-08-09 1985-02-21 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Elektrische maschine, insbesondere elektromotor
US4866322A (en) * 1986-08-27 1989-09-12 Swf Auto-Electric Gmbh Electrical machine, especially electric motor
US6700291B2 (en) * 2001-12-26 2004-03-02 Asmo Co., Ltd. Brush holding device, motor having the same, and method for assembling motor
DE10355982A1 (de) * 2003-11-27 2005-06-30 Valeo Motoren Und Aktuatoren Gmbh Bürstenhalter für Elektromotoren sowie Elektromotor mit einem solchen Bürstenhalter
DE102018132050B3 (de) * 2018-12-13 2020-02-06 Schunk Carbon Technology Gmbh Bürstenmodul und Verfahren zur Montage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328683A1 (de) * 1983-08-09 1985-02-21 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Elektrische maschine, insbesondere elektromotor
US4866322A (en) * 1986-08-27 1989-09-12 Swf Auto-Electric Gmbh Electrical machine, especially electric motor
US6700291B2 (en) * 2001-12-26 2004-03-02 Asmo Co., Ltd. Brush holding device, motor having the same, and method for assembling motor
DE10355982A1 (de) * 2003-11-27 2005-06-30 Valeo Motoren Und Aktuatoren Gmbh Bürstenhalter für Elektromotoren sowie Elektromotor mit einem solchen Bürstenhalter
DE102018132050B3 (de) * 2018-12-13 2020-02-06 Schunk Carbon Technology Gmbh Bürstenmodul und Verfahren zur Montage

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