Electric motor having a flange and a circuit board

Abstract

Proposed is an electric motor having a flange and a circuit board, wherein: metal contact pins of the electric motor through holes in the flange; a bracket has hollow cylindrical projections that are inserted at least in part into the holes in the flange; the contact pins extend through the hollow cylindrical projections and are guided in the hollow cylindrical projections; the circuit board lies against the bracket, in particular on the side of the bracket which faces away from the flange; and the contact pins are inserted into metal contact bushings that are electrically connected to conductor tracks on the circuit board.

Description

[0001] Electric motor with a flange and a circuit board

[0002] Description:

[0003] Description:

[0004] The invention relates to an electric motor with a flange and a circuit board.

[0005] It is common knowledge that an electric motor is supplied with electricity via connectors.

[0006] The invention is therefore based on the object of developing a device and a method, wherein

[0007] According to the invention, the object is achieved in the electric motor according to the features specified in claim 1.

[0008] Important features of the invention in the electric motor with a flange and a printed circuit board are that metallic contact pins of the electric motor protrude through holes (6) in the flange, in particular through through holes in the metallic flange, wherein a holder has hollow cylindrical projections which are at least partially inserted into the holes in the flange, wherein the contact pins protrude through the hollow cylindrical projections and are guided in the hollow cylindrical projections, wherein the printed circuit board rests against the holder, in particular on the side of the holder facing away from the flange, wherein the contact pins are inserted into metallic contact sockets, in particular plug-in contact sockets, which are electrically connected, in particular soldered and / or force-fit, to conductor tracks of the printed circuit board. It is advantageous in this case that the holder accommodates and stabilizes the contact pins.The contact pins are thus positioned precisely by the holder and are inserted into the contact sockets when the circuit board is placed and electrically contacted.

[0009] The bracket is precisely positioned on the flange by inserting the projections into a predefined hole pattern. This ensures reliable manufacturing, especially since the contact pins can be inserted into the contact sockets without bending.

[0010] In an advantageous embodiment, the stator winding is electrically connected to the contact pins, in particular for supplying the stator winding with electrical power via the contact pins. Advantageously, the contact pins extend through the flange and are plugged into the contact sockets mounted on the circuit board.

[0011] In an advantageous embodiment, the holder is formed with a first spacing rail that rests against the circuit board, and a second spacing rail that rests against the flange. Advantageously, the holder defines the distance between the circuit board and the flange.

[0012] In an advantageous embodiment, the first spacing rail extends parallel to the second spacing rail. Advantageously, a protected space is provided between the two spacing rails for the cable that supplies the coil of the electromagnetically actuated brake to exit.

[0013] In an advantageous embodiment, the circumferential angular range covered by the holder in the circumferential direction with respect to the axis of rotation of the rotor shaft extends over more than 180°, and / or the radial distance range covered by the holder is arranged radially outside the radial distance range covered by the rotor shaft, and / or the holder is arranged radially outside the rotor shaft. It is advantageous in this case that the holder is curved in such a way that the rotor shaft is bypassed and the holder is spaced from the rotor shaft. In an advantageous embodiment, the contact sockets are arranged on the side of the circuit board facing away from the flange and / or the holder, in particular are populated on the circuit board. It is advantageous in this case that the contact sockets are populated on the circuit board and soldered together.

[0014] In an advantageous embodiment, the holder is manufactured as a plastic injection-molded part, in particular in one piece and / or in one piece with the hollow cylindrical projections, the support rails, and / or the spacer rails. This allows for cost-effective production. Furthermore, the contact pins can be surrounded by insulation-resistant material.

[0015] In an advantageous embodiment, the circuit board is equipped with an electrical connector part, in particular one that is connected to a mating connector part mounted on another circuit board. This is advantageous because the power supply to the stator winding and the brake coil is routed via a plug-in connection via the connector, thus making it easy to contact during manufacture and maintenance.

[0016] In an advantageous embodiment, a bearing for the electric motor's rotor shaft is housed in the flange. Advantageously, the flange is made of metal and the bearing is preferably a ball bearing.

[0017] In an advantageous embodiment, the rotor shaft extends through a recess in the flange and / or the circuit board. Advantageously, the rotor shaft can be connected on the B-side to an angle sensor for detecting the angular position and / or to a fan.

[0018] In an advantageous embodiment, threaded holes are provided in the flange into which screws are screwed, the respective screw heads of which press the circuit board towards the flange on its side facing away from the flange and / or the holder, in particular wherein a distance between the flange and the circuit board is maintained by means of the first spacer rail and the second spacer rail. It is advantageous in this case that the circuit board is pressed by the screws, in particular in the direction towards the flange. It is also particularly advantageous that the spacer rails reliably define a distance between the circuit board and the flange. In an advantageous embodiment, an electronic circuit is formed from electronic components mounted on the circuit board, which circuit energizes the coil of an electromagnetically actuated brake of the electric motor.The advantage here is that the current supply can be used to control the brake.

[0019] In an advantageous embodiment, the holder has a slot which opens into a recess, in particular a recess which extends through the holder, wherein a cable is guided through the recess and through a recess in the flange, in particular wherein the cable supplies one or the coil of an electromagnetically actuated brake of the electric motor and / or wherein a plug connector is arranged on the cable, in particular wherein the cable can be pushed through the slot into the recess. The advantage here is that a brake cable can be safely guided through the holder and, by means of the slot, securely into the otherwise closed recess which extends axially through the holder.

[0020] In an advantageous embodiment, two support rails are formed on the side of the holder facing the circuit board, with the rails extending parallel to each other and resting against the circuit board, and / or with the rails extending parallel to the slot and / or the slot plane. This is advantageous in that the brake cable can be securely routed between the two support rails, thus preventing kinking.

[0021] In an advantageous embodiment, a bead is formed on each hollow cylindrical projection, in particular one that protrudes radially from the holder relative to the rotational axis of the rotor shaft. Advantageously, the bead extends axially and protrudes radially. Its circumferential extension is smaller than the circumferential extension of the hollow cylindrical projection. This makes it easy to support a human hand on the bead.

[0022] The radial direction and the circumferential direction are always related to the axis of rotation of the rotor shaft.

[0023] In an advantageous embodiment, a bead is formed on the holder, in particular wherein the bead extends in the normal direction of the slot plane and / or protrudes from the holder, in particular for bending the holder open at the slot. Advantageously, the bead extends axially and protrudes radially. Its circumferential extension is smaller than its axial extension, smaller than its radial extension, and smaller than the circumferential extension of the hollow cylindrical projection. Thus, supporting a human hand on the bead is easy to implement.

[0024] Further advantages emerge from the dependent claims. The invention is not limited to the combination of features in the claims. Further possible combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent to those skilled in the art, particularly from the problem and / or the problem posed by comparison with the prior art.

[0025] The invention will now be explained in more detail using schematic illustrations:

[0026] Figure 1 shows a partial area of ​​an electric motor according to the invention in an oblique view, wherein an electronic circuit is not present.

[0027] In Figure 2, a holder 21 is inserted into the partial area.

[0028] In Figure 3, a circuit board 31 is additionally mounted.

[0029] In Figure 4, the holder 21 is shown in an oblique view from a first viewing direction.

[0030] In Figure 5, the holder 21 is shown in an oblique view from a second viewing direction.

[0031] As shown in Figure 1, the electric motor according to the invention has a flange 31, in particular a housing flange, which has through holes 6 through which contact pins 2 protrude. The stator winding of the electric motor is preferably designed as a three-phase winding and therefore has three terminals designed as contact pins 2, to which the winding wire ends of the stator winding are electrically connected, in particular soldered.

[0032] The contact pins 2 protrude through the holes 6 and on the side of the flange 31 facing away from the stator winding.

[0033] Furthermore, the flange 31 has a continuous recess 5 through which a cable 4 is passed. This cable supplies the coil of an electromagnetically actuated brake of the electric motor. When the coil is energized, an armature disk is drawn toward the coil, causing a disk-shaped brake pad carrier arranged axially displaceably on the rotor shaft 3 of the electric motor to free itself. When the coil is deenergized, spring elements supported on the coil or its coil core press the armature disk away from the coil toward the brake pad carrier, so that the brake pad carrier, on its side facing away from the armature disk, bears against a braking surface formed on the flange 31.

[0034] The rotor shaft 3 also extends through another recess in the flange 31. Threaded holes 7 are provided in the flange, into which screws 32 can be screwed.

[0035] As shown in Figure 2, the holder 21, preferably made of plastic, with hollow cylindrical projections 46 formed thereon, visible in Figure 4, is inserted into the holes 6 and thus connected in a force-locking manner and precisely aligned relative to the flange 31. This is because the three holes 6 are not arranged one behind the other in a straight line, but the third hole 6 is spaced from the connecting line of the other two holes 6.

[0036] During insertion, the contact pins 2 are guided through the through holes 44 of the holder 21. The contact pins 2 are precisely positioned and held in place by the holder 21.

[0037] Support rails 41 are formed on the holder 21 and rest against the printed circuit board 31 visible in Figure 3, which is located on the side of the holder 21 facing away from the flange 1.

[0038] Preferably, the two support rails 41 extend parallel to each other. Between the two support rails 41, the holder 21 has a slot 40, in particular a half-slot, which opens into a recess 47 of the holder extending through the holder 21.

[0039] A bead 43 protruding from the bracket 21 facilitates bending open the slot 40, so that the cable 4, in particular the cable that supplies the coil of the electromagnetically actuated brake of the electric motor, can be slid through the slot 40 into the recess 47. Thus, the cable 4 is guided through the recess 47 and passed between the support rails 41 and the circuit board 31. The support rails 41 arranged adjacent to the recess 47 and the slot 40 protect the cable 4 from damage, for example, from kinking.

[0040] A spacing rail 42 is integrally formed on the bracket 21 and protrudes toward the flange 1. On the opposite side of the bracket 21, a further spacing rail 45 is integrally formed on the bracket 21. A printed circuit board 31 is placed on the side of the bracket 21 facing away from the flange 1, which circuit board rests against the further spacing rail 45 and thus maintains a defined distance from the flange 1.

[0041] The contact pins 2 protrude through the circuit board 31 and are connected by contact to contact sockets 30, which are arranged on the side of the circuit board 31 facing away from the flange 1 and are electrically connected, in particular soldered, to the conductor tracks of the circuit board 31. The contact pins are inserted into the contact sockets 30 and connected in a force-locking manner. During insertion, the contact pins are guided by the holder 21 and thus stabilized.

[0042] The bead 43 projects laterally from the holder 21, preferably in the normal direction to the slot plane of the slot 40.

[0043] The printed circuit board 31 is fastened to the flange 1 by screws which are screwed into threaded holes in the flange 1, in particular whereby the screw heads of the screws press the printed circuit board 31 against the holder 21.

[0044] The contact sockets 30 are electrically connected to conductor tracks of the circuit board 31, in particular soldered or force-fitted.

[0045] The electrical supply to the stator winding of the electric motor is provided via the contact sockets 30, which are electrically connected to the contact pins 2 and are electrically connected to the respective conductor tracks of the circuit board 31. These conductor tracks are routed to a connector part 34, which is mounted on the circuit board 31 and is intended and / or designed to be plugged into a mating connector part of another circuit board.

[0046] In addition, electronic components 33 are mounted on the circuit board 31, which control the current supply to the coil of the electromagnetically actuated brake of the electric motor. The electronic circuit formed by the electronic components 33 is also electrically supplied via the connector part 34.

[0047] In particular, the electronic circuit has a pulse-width modulated control of at least one electronic semiconductor switch, in particular an IGBT or MOSFET, which controls the current of the coil. The rotor shaft 3 protrudes axially through a recess in the circuit board 31.

[0048] A bearing for the rotor shaft 3 is accommodated in the flange 1.

[0049] In further embodiments of the invention, the electric motor is designed as a single-phase motor, thus requiring only two contact pins instead of three. However, the holder 21 still has the three hollow cylindrical projections, so that the holder 21 is precisely aligned and positioned on the flange 1.

[0050] List of reference symbols

[0051] 1 flange, especially housing flange

[0052] 2 contact pins

[0053] 3 Rotor shaft

[0054] 4 cables, especially brake cables

[0055] 5 continuous recess

[0056] 6 holes, especially through holes

[0057] 7 threaded hole

[0058] 21 Bracket

[0059] 30 contact socket

[0060] 31 circuit board

[0061] 32 screw

[0062] 33 electronic components

[0063] 34 Connector part for mating connector part of another circuit board

[0064] 40 slot, especially half slot

[0065] 41 support rail

[0066] 42 first spacing rail

[0067] 43 bulge

[0068] 44 through hole

[0069] 45 second spacing rail

[0070] 46 hollow cylindrical projection

[0071] 47 Recess, in particular continuous recess

Claims

Patent claims:

1. Electric motor with a flange and a printed circuit board, wherein metallic contact pins of the electric motor protrude through holes (6) in the flange, in particular through through holes in the metallic flange, characterized in that a holder has hollow cylindrical projections which are at least partially inserted into the holes (6) in the flange, wherein the contact pins protrude through the hollow cylindrical projections and are guided in the hollow cylindrical projections, wherein the printed circuit board, in particular on the side of the holder facing away from the flange, rests against the holder, wherein the contact pins are inserted into metallic contact sockets, in particular plug-in contact sockets, which are electrically connected, in particular soldered and / or force-fit connected, to conductor tracks of the printed circuit board.

2. Electric motor according to claim 1, characterized in that the stator winding is electrically connected to the contact pins, in particular for the electrical supply of the stator winding via the contact pins.

3. Electric motor according to one of the preceding claims, characterized in that a first spacing rail (42) is formed on the holder, which rests on the circuit board, and a second spacing rail (45) which rests on the flange.

4. Electric motor according to one of the preceding claims, characterized in that the first spacing rail (42) extends parallel to the second spacing rail (45).

5. Electric motor according to one of the preceding claims, characterized in that the circumferential angular range covered by the holder relative to the axis of rotation of the rotor shaft in the circumferential direction extends over more than 180°, and / or that the radial distance range covered by the holder is arranged radially outside the radial distance range covered by the rotor shaft, and / or that the holder is arranged radially outside the rotor shaft.

6. Electric motor according to one of the preceding claims, characterized in that the contact sockets are arranged on the side of the circuit board facing away from the flange and / or the holder, in particular are mounted on the circuit board.

7. Electric motor according to one of the preceding claims, characterized in that the holder is manufactured as a plastic injection-molded part, in particular in one piece and / or in one piece with the hollow cylindrical projections, the support rails and / or the spacing rails.

8. Electric motor according to one of the preceding claims, characterized in that the printed circuit board is equipped with an electrical connector part, in particular which is connected to a mating connector part that is equipped on a further printed circuit board.

9. Electric motor according to one of the preceding claims, characterized in that a bearing of the rotor shaft of the electric motor is accommodated in the flange, and / or that the rotor shaft projects through a recess in the flange and / or the circuit board.

10. Electric motor according to one of the preceding claims, characterized in that threaded holes are provided in the flange, into which screws are screwed, the respective screw heads of which press the circuit board towards the flange on its side facing away from the flange and / or the holder, in particular wherein a distance between the flange and the circuit board is maintained by means of the first spacing rail (42) and the second spacing rail (45).

11. Electric motor according to one of the preceding claims, characterized in that an electronic circuit is formed from electronic components mounted on the circuit board, which electronic circuit energizes the coil of an electromagnetically actuated brake of the electric motor.

12. Electric motor according to one of the preceding claims, characterized in that the holder has a slot which opens into a recess, in particular a recess passing through the holder, wherein a cable is guided through the recess and through a recess in the flange, in particular wherein the cable supplies one or the coil of an electromagnetically actuated brake of the electric motor and / or wherein a plug connector is arranged on the cable, in particular wherein the cable can be moved through the slot into the recess.

13. Electric motor according to one of the preceding claims, characterized in that on the side of the holder facing the circuit board, two support rails are formed on the holder, wherein the rails extend parallel to one another and bear against the circuit board, and / or wherein the rails extend parallel to the slot and / or to the slot plane.

14. Electric motor according to one of the preceding claims, characterized in that a bead is formed on the respective hollow cylindrical projection, in particular which bead is arranged in the radial direction relative to the axis of rotation of the rotor shaft on the bracket protrudes.

15. Electric motor according to one of the preceding claims, characterized in that a bead is formed on the holder, in particular wherein the bead extends in the normal direction of the slot plane of the slot and / or protrudes on the holder, in particular for bending the holder at the slot.

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