• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An electric machine stator (10) having a body (34) with radial teeth (14) receiving portions (17) of an electrical coil (16). The front face (39) of the stator body (34) has an insulating lamella (40) with guide elements (44) for the connecting cables (30, 31) passing between the coil portions (17). Axially on the insulating lamella (40) there is a separately manufactured wiring plate (52) which includes the conductive elements (63) for the electrical connection of the connecting cables (30, 31) with the customer-specific connector (56). . The wiring plate (52) bears against the end face (39) of the stator body (34) by spacers (84).
    公开号:FR3031421A1
    申请号:FR1650097
    申请日:2016-01-07
    公开日:2016-07-08
    发明作者:Christian Aumann；Konstantin Haberkorn；Tamas Csoti
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    [0001] Field of the Invention The present invention relates to an electric machine stator carrying a stator body with radial stator teeth for receiving coil portions of an electrical winding, the front face of the stator body having a insulating lamella with guiding elements for the connecting cables between the coil parts, a separately manufactured wiring plate being installed axially on the insulating lamellae, this plate having conductive elements for the electrical connection of the connecting cables to customer specific nectors for a control device. The invention also relates to a method of manufacturing such a stator. State of the art DE 10 2012 224 153 A1 discloses an electric machine stator with a bundle of lamellae axially provided with an insulating lamella and a wiring plate. The stator is for example wound by a needle winding; the different coil parts are connected to each other by connecting cables at the outer periphery of the wiring plate. The entire winding is thus combined in one piece using a single winding cable. For the electrical connection of the winding, in this embodiment it is necessary for the control unit, a connection plate specific to each customer. This plate comprises connecting links not shown for the control device. Such a customer connection plate is installed axially on the wiring plate so that the axial manufacturing tolerances of the insulating strip, the wiring plate and the customer's connection plate add up. Under these conditions, the connections to the control unit do not have a clearly defined axial position generating contact problems for the control unit. DESCRIPTION AND ADVANTAGES OF THE INVENTION The object of the present invention is to remedy these disadvantages and for this purpose concerns an electric machine stator of the type defined above, characterized in that the connection plate bears against the front face of the stator body via spacer. The stator according to the invention has the advantage that the embodiment of spacer member in the axial direction on the wiring plate makes it possible to press it without the interposition of another component, directly against the front surface of the stator body. This makes it possible to eliminate the manufacturing tolerances of the insulating lamella and, if necessary, of another disk or wiring plate so that the tolerances of the connector depend solely on the manufacture and assembly of the wiring plate and the conductive elements. that she wears. Such a short tolerance chain allows a very precise positioning of the connector relative to the reference surface of the motor housing. According to another advantageous characteristic, the wiring plate is in the form of a closed plastic ring whose inner recess receives the rotor. In the axial direction, the plastic body comprises on the one hand the fastening elements of the branch connectors and axially on the opposite side one has the spacer member which is applied against the front face of the stator body. Since the conductive elements are integrally connected to the connection connector with the wiring plate, the one-piece construction of the entire plastic body significantly reduces manufacturing tolerances for the axial positioning of the connection with the switchgear. ordered.
    [0002] To avoid any collision of the connecting cables of the different coil parts, the annular zone of the wiring plate is inserted radially into the guiding elements of the insulating lamella. The guide elements thus constitute a radial separation between, on the one hand, the conductive elements installed on the guiding elements on the plastic ring, and, on the other hand, the connecting cables installed radially on the outside on guiding elements. This avoids any risk of short circuit in the wiring. The spacers are also formed radially outwardly of the guide members and axially pass over the connecting cables to the front surface of the stator.
    [0003] Particularly advantageously, the spacers are formed axially, exactly opposite the fastening elements because then the forces acting on the fasteners will be absorbed optimally by contacting the control device. As the spacers are located radially at the outer periphery, they can be advantageously made in one piece using connecting struts with the fasteners, in particular by injection. So that the spacers can be directly applied against the front face of the stator body in the axial direction, the insulating lamella has axial passages allowing free access to the sheet metal plate of the top of the stator body. To avoid the collision between the spacer member and the guide elements and the connecting cables, the passage openings in the insulating strip are also provided on the outermost radial edge. From the point of view of the manufacturing technique, the through orifices are very simple to perform by injection in the form of radially open holes and after mounting the stator in the motor housing, the latter closes the through-holes radially.
    [0004] Particularly advantageously, the spacers form a connection with the through orifices by hooking or clipping because then the wiring plate is fixed to the connection of the conductive elements with the connecting cables, reliably in the axial direction, especially in the peripheral direction. Preferably, the spacer member comprises resiliently movable gripping elements which are for example made in the form of resilient spacers whose longitudinal axis extends substantially in the axial direction. The elastic spacer then comprises for example a hook which penetrates into a corresponding complementary element of the through hole. For this, the wall of the through hole comprises for example axially towards the front face of the stator body, a recess in the peripheral direction which forms an axial undercut for the fastening element.
    [0005] Thus, during the axial insertion into the through hole, the elastic spacer will be spaced in the peripheral direction and the hook after complete introduction of the spacer member in the passage opening, will hang in the against de-impregnated to thereby block the wiring plate, axially against the stator body. To achieve exact and reliable positioning in the peripheral direction without requiring additional means, at least two spacers comprise elastic spacers oriented in opposite peripheral directions. Thus the two spacers will be preloaded relative to each other in the peripheral direction so as to compensate for the tolerances necessary for mounting the wiring plate. To position the connector axially, precisely, the fasteners have an axial attachment surface, if possible in the region of their free axial end and these fastening surfaces bear axially against the connector. The method of fixing the conductive elements on the wiring plate is for example by plastic rivets decoupled from an axial position of the connector. Thus, any inaccuracies in the welding of the fastening segments to the connecting cable or the connection of the middle segments with the plastic body do not cause any deviation in the positioning of the reader with respect to the front face or the reference surface of the motor housing. In a particularly advantageous manner, the stator body is formed of stamped sheet metal lamellae which have a closed sheet metal blank at the periphery. Such a complete cutting of the stator is easy to wind up, for example according to the needle winding method of optionally generating a tilting of the teeth in that the sheet metal blades are rotated in the peripheral direction, by pivoting them. a small angle to each other. Thus, although the sheet metal blades are identical in manufacture, the coupling torque of the electric motor is significantly reduced. By reducing the axial tolerances to the mounting of the wiring plate, an electrical machine according to the invention is manufactured, both of which the front face of the stator packet and also the axial ends of the connector will have an exact measurement predefined with respect to the surface. reference on the motor housing. This also makes it possible to exactly position the bearing cover of the rotor of the electrical machine in the axial direction so that the passages receive the fastening elements with the connector as connector base; there is thus a clearly defined interface for the control apparatus. The invention also relates to a method of manufacturing such a stator. This method is characterized by assembling an insulating lamella axially on the front surface of the stator body, then winding the stator body with coil portions and installing the connecting cables between the coil portions in the guides the insulating lamellae, then the wiring plate is assembled axially on the insulating lamella on the stator body so that the fastening elements of the spacer members catch in the through holes of the insulating lamellae and block the wiring plate on the stator body, the conductor elements of the wiring plate are electrically connected to the connecting cables, preferably by soldering or soldering, and the stator body is then inserted into the motor housing at an exactly predefined axial distance from the housing. front surface with respect to a reference surface of the motor housing and then the bearing cover is positioned axially With respect to the reference surface for closing the motor housing, the connection pins with the fastening elements passing through the passageways of the bearing cover to exit the housing. The method of manufacturing the stator according to the invention has the advantage that on the one hand the wiring plate is applied with low tolerances, directly against the front face of the stator body and that at the same time as the production of With the connection hooked or latched, the wiring plate locks axially and in the peripheral direction in a manner that is guaranteed against the stator body, which avoids any misalignment of the wiring board during assembly until the conductive elements of the wiring plate are in integral contact with the connecting cables. The reduction of the axial tolerances chain allows for a clearly defined interface between the bearing cover and the connector with the connection pins of the control unit. Drawings The present invention will be described hereinafter in more detail with the help of examples of the electric machine stator and their method of manufacture with the aid of the accompanying drawings in which: FIG. 1 is a winding diagram according to the invention, FIG. 2 shows an insulating lamella according to the invention, FIG. 3 shows a first example of a stator wound with an insulating lamella, FIG. 4 is a view from above corresponding to FIG. 5 and 6 show an exemplary embodiment according to FIG. 3 with a first embodiment of a wiring plate, reported, FIGS. 7 and 8 show an exemplary embodiment according to FIG. 3 with a second embodiment of a Wiring plate reported, Figure 9 shows the wiring plate of Figures 7 and 8 without the stator and Figure 10 shows a stator installed in a motor housing. DESCRIPTION OF EMBODIMENTS FIG. 1 schematically shows a development of stator 10 whose teeth 14 represent the diagram of an electric winding 16. The stator 10 has for example 12 teeth 14. Each stator tooth 14 carries a coil portion 18 always wound precisely. Thus, there are in each case two directly adjacent coil portions 18 connected by a short connecting cable 31 with a pair of adjacent coil portions 17. The winding is done for example with a first start of cable 28 on a second stator tooth 14 and is passed with a connecting cable 30 to the fifth stator tooth 14. Directly after the fifth stator tooth 14 is performed the winding of the sixth stator tooth 14 so that this pair of coil portions 17 will be connected with the short connecting cable 31 for the two adjacent coil portions 18. After the sixth stator tooth 14 the winding cable 22 is led with the connecting cable 30 to the third stator tooth 14 to then make the pair of coil portions 17 of the fourth tooth with the connecting cable 31. stator 14. From the fourth stator tooth 14, the winding cable 22 passes through the connecting cable 30 on the first stator tooth 14; the cable end 29 of the first winding cord 24 will then be directly adjacent to the beginning of the cable 28. The second winding cord 25 is wound with a separate winding cable 22 according to the winding of the first cord 24 so that the there will thus be three other pairs of coil portions 17 of the coil portions 18 directly adjacent and which will be connected by means of a short connecting cable 31. The beginning 28 of the cable and the end 29 of the cable of the two test leads winding 24, 25 are each electrically connected. In this embodiment, after making the winding, there will always be two pairs of coil portions 17 connected to a phase 26 so that there will be exactly three phases U, V, W with each time four coil parts. The first three pairs of coil portions 17 form an own winding cord 24 made with a separate winding cord 22 and opposite the second winding cord 25 with also three pairs of coil portions 17, in isolation; this is indicated by a line-point between the sixth and the seventh stator tooth 14. Thus, for such a coil, six distinct phases can be controlled. In our embodiment, however, two pairs of coil portions 17 which are exactly opposite each other and which correspond to different winding cables 24, 25 which are connected by conducting elements 58 to a wiring plate 52 by an electrical connection for reduce the implementation of electronic means in the control device. FIG. 3 is a perspective view of a stator 14 with a winding according to the diagram of FIG. 1. The stator 14 has a stator body 34 made up, for example, of plate lamellae 36. The stator body 34 comprises a closed annular flow return yoke 38 on which stator teeth 14 turned radially inwards are made. Inside, the stator 14 has a circular recess 37 which receives the not shown rotor as it appears better in FIG.
    [0006] The stator teeth 14 extend in the radial direction 4 inwards and in the axial direction 3 along the rotor axis. In the exemplary embodiment, the stator teeth 14 are deformed in the peripheral direction 2 to reduce the coupling torque of the rotor. For this purpose, for example, one rotates relative to the other, the sheet metal lamellae 36 in the peripheral direction 2. Before winding on the stator body 34, insulating lamellae 40 are applied on both sides axial end faces 39, for electrically isolating the winding cable 22 with respect to the stator body 34. At least one of the two insulating lamellae 40 has a closed annular periphery 41 from which radially insulating teeth 42 emerge. 4 and which cover the end faces 39 of the stator teeth 14. The annular periphery 41 of the insulating lamellae 40 comprises guide elements 44 which receive the connecting cables 30, 31 between the coil portions 18. For this, for example the The outer periphery 41 has grooves 45 oriented in the circumferential direction 2 so that the connecting cables 30, 31 are in axially offset planes so as to avoid any crossing of the connecting cables. its 30, 31. The short connecting cables 31 between the coil portion pairs 17 are in the upper plane in the axial direction; in particular, all six connecting cables 31 for the connection of the phase terminals pass in the same axial plane. Thus, always between two coil portions 18 of a pair of coil portions 17 there will be two axial extensions 46 separated from each other by an intermediate radial passage 47. Thus, the short connecting cables 31 of the pairs of coil portions 17 are freely accessible from all sides and in particular in the region of the radial passage 47 the cables do not apply against the insulating lamella 40. The two cable starts 28 and end of cable 29 of this embodiment are locked in a labyrinth device 50 which are directly adjacent each time in the peripheral direction 2 for the two axial extensions 46 spaced apart by a radial passage 47. FIG. the beginning of the cable 28 of the first winding cord 24 passes in the circumferential direction of the radial passage 47 parallel and directly adjacent the cable end 29 of the first winding cord 24. The beginning of the cable 28 is in a first labyrinth device 50 on one side of the radial passage 47 and the cable end 29 of the first winding cord 24 is in a second labyrinth device 50, in the circumferential direction, radially opposed to the passage 47.
    [0007] This parallel arrangement of the connecting cables 31 to allow in the same way that the connecting cables 31 pairs of coil parts 17, wound, are brought into electrical contact to control phases. Figure 4 also shows very well that the two connecting cables 31 which are parallel, are on the same radius. The free end of the beginning of the cable 28 and the end of the cable 29 terminates directly after the corresponding labyrinth devices 50 so that they do not protrude radially from the connecting cables 30, 31. The connecting cables 30 , 31 all pass in the peripheral direction 2 along the guide elements 44 and radially apply outside the coil portions 18 wound on the stator teeth 14. In FIG. 4, the two motor halves 11 are schematically separated by a line in dot-dots; the left half 11 of the engine is electrically isolated from the right half 13 of the engine. The electric winding 16 is for example manufactured by needle winding; the connecting cables 30, 31 extend radially between the coil portions 18 with the winding head and are deposited in the guide elements 44. In this embodiment, all the connecting cables 30, 31 are located axially on one side of the stator body 34 according to an alternative embodiment shown, a portion of the connecting cables 30, 31 is on the axially opposite side of the stator 14. Thus, for example, the connection cables 31, short, may be installed for connection the phase control in a first insulating lamella 40 and the other connecting cables 30 which interconnect the different pairs of coil portions 17 arrive on the insulating lamella 40 located axially opposite. According to FIG. 5, a first embodiment of a wiring plate 52 is installed on the stator 10 of FIG. 3. This wiring plate makes it possible to control the electric winding 16. For this, the wiring plate 52 comprises a pin of FIG. connection 54 which can receive a customer-specific connector 56 for a control apparatus. In this embodiment there are exactly six connection pins 54 electrically connected each time to a pair of coil portions 17 of the electrical winding 16. Six phases 26 are formed precisely with each a pair of coil portions 17 so that that the six connectors are brought into contact by six connecting cables 31 with pairs of adjacent coil portions 17. For this purpose, the wiring plate 52 has precisely six conductive elements 58 having at one axial end folded, the connector of connection 54 and at the other end, the attachment segment 60 connected to the connecting cable 31 for example by a weld. The wiring plate 52 comprises a plastic body 62 in the form of a closed ring for introducing the rotor into the stator 10. The plastic body 62 comprises hook elements 63 made in one piece and which deviate from the stator body 34 in the axial direction 3. The conductive elements 58 extend in the peripheral direction 2 along the plastic body 62; the folded connecting pin 54 passes into the fixing elements 63 in the axial direction 3. At the other end, the conductive elements 58 of the fixing segment 60 and whose free end is in the form of a loop 64 around the connecting cables 31. The loop 64 is made of sheet metal and its section is substantially rectangular. In the exemplary embodiment, the conductive elements 58 are stamped parts 59 made of sheet metal, so that the loop 64 at the free end of the fixing segment 60 will be bent to the mounting, around the connecting cable 31. After installation of the With open loop 64 around the connecting cable 31, for example, electrodes are applied against radially opposite surfaces of the loop 64 in order to compress them in the radial direction 4, whereas for soldering the loop 64 to the connecting cable 31, the power supply. The insulating varnish of the connecting cable 31 melts, which gives a metallic connection by the material between the fixing segment 60 and the connecting cable 31. The loop 64 is applied in the region of the radial passage 47 around the connecting cable 31 because in this region there is no guide element 44 between the connecting cable 31 and the loop 64. There is thus sufficient clearance to apply the electrodes and to compress the branch end 65 free of the loop 64 against the fixing segment 60 so as to close the loop 64. The loop 64 thus surrounds only a connecting cable 31 or at the same time two parallel connecting cables 31 formed from the beginning of the cable 28 and the end of the cable 29 of a single winding cord 24, 25 and this according to the pair of coil portions 17. The connection pins 54 are for example made in the form of clamping connection and knife 55 which have a check mark 69 at the free end 6 8. A cable or an element to be tightened of the corresponding connecting connector 56 of the client is introduced as well. For example, at the end 68 hooks 124 are formed which catch in the corresponding connecting connector 56. The connection pin 54 further comprises a cross member 70 oriented in the radial direction 4 and which bears against an axial stop 72 of the fastening element 63. In addition, the fastening element 63 comprises a first guide surface 74 and a second guide surface 75; these two surfaces support the connection pin 54 in two opposite peripheral directions 2. This prevents the connection pin 54 from bending or bending when the connector 56 is introduced into the peripheral direction 2, which guarantees the axial tolerances of the connection. The conductive elements 58 are at least partially juxtaposed in the radial direction so that it is necessary for the securing segments 60 of the inner conductive elements 58 to cross radially the outer conductive elements 58 to come into contact with the connecting cables 31. This is why the radially inner conductive elements 58 are on a higher axial path 76 and the radially outer conductive elements 58 are on an axially lower path 77 of the plastic body 62. The medial segments 78 are shaped strips of conductive elements 58 are surface-applied against the plastic body 62 and are for example connected by riveted connections or fastening components. For this, for example, the plastic body 62 comprises an axial pin 79 which passes through a corresponding axial passage 80 of the conductive element 58. By applying heat, especially ultrasound, it is possible to transform the ends of the pins again. rivet 79 to have a rivet head 81 thereby forming the shape connection with the conductive element 58. In the embodiment of FIGS. 5 and 6, there are always two connection pins 54 in a common fastener 63; these pins are separated from each other in the peripheral direction 2 by a middle branch 82 with on either side a first and a second guide surface 74, 75 for the respective connecting pin 54. The second and the first guide surfaces 75, 74 facing the middle branch 82 are formed by complementary surfaces 83, which extend in the radial direction 4 and in the axial direction 3. In the region of the fastening elements 63, directly opposite the axially, spacers 84 support the wiring plate 52, axially relative to the stator body 34. In the embodiment of Figures 5 and 6, precisely a fastener 63 has a width 85 greater in the circumferential direction 2 than that of the two other fastening elements 63. Thus a rotation keying is performed for the bearing cover not shown and which is added axially to the Figure 6 shows how the two connecting pins 54 are applied on both sides against the middle branch 82. The respective middle segment 78 of the conductive element 58 is wound each However, since the radially opposed conductive elements 58 are on axially different paths 76, 77, they do not touch each other and are thus electrically isolated from one another. The inner ring of the plastic body 62 is slightly corrugated so that a punch-shaped tool for making the stator 10 in the mounting housing can not be applied directly against the end face 39 of the radially inner regions. stator teeth 14.
    [0008] FIG. 7 shows the embodiment of the stator 10 according to FIG. 3 as another example of a wiring plate 52 controlling the electric winding 16. This embodiment corresponds to the control with precisely three phases U, V, W according to FIG. In this embodiment, the wiring plate 52 comprises precisely three connection pins 54 for receiving customer-specific connection connectors 56. Each branch pin 54 is part of a conductive member 58 having a first pair of coil portions 17 with a second pair of coil portions 17, particularly in a radially directly opposed position for an electrical connection. For this, starting from the connecting pin 54 extending in the axial direction 3, there is a first branch 90 and a second branch 91 curved in the peripheral direction 2. The two branches 90, 91 together form a semicircle and extend along the annular body of plastics material 62; the branches have at their end opposite to the connection pin 54, fixing segments 60 for the electrical connection with the connecting cables 30, 31 of the coil portions 18. The first branch 90 of a first conducting element 58 is located radially inside the second leg 91 of a second conductive member 58. The securing segment 60 of the first inner leg 90 thus crosses the second outer leg 91 of the second conductive member 58 in the radial direction 4 without touching it. Thus, the radially inner legs 90 are on a path 76 higher in the axial direction than the radial outer leg 91, which lies on a plane 77 located deeper in the plastic body 62. The conductive elements 58 made in the form of sheet tapes, are applied flat against the plastic body 62 and are for example connected by riveted connections or fastening components providing the connection. Thus, for example, the plastic body 62 comprises axially oriented rivet rods 79 which reach the axial passages 80 of the conductive elements 58. By applying heat, in particular by ultrasound, the ends of the pins are formed. or rivet rods 79 in the form of a rivet head 81 thus making a shape connection with the conductive elements 58. Thus, for example, each branch 90, 91 is secured by means of two rivet heads 81 to the Wiring plate 52 as is particularly apparent in FIG. 8. The plastic body 62 has fasteners 63 made in one piece which deviate in the axial direction 3 from the stator body 34. and receive the connecting pins 54. The pins 54 are for example made as shown in FIG. 5, in the form of knife clamp connections 55 whose free axial end 68 has a notch 69 in which is introduced a cable or a clamping element of the connection connector 56 of the customer. The fasteners 63 of this embodiment are in two parts. A radial axial inner extension 92 forms a first guide surface 74 in a first peripheral direction 2 and a radial outer axial extension 93 form the second guide surface 75 for the opposite peripheral direction 2. The two axial extensions 92, 93 are offset in the peripheral direction 2 so that between the guide surfaces 74, 75 there will be the connecting pin 54 extending in the axial direction 3. The axial extensions 92 each have a bearing surface 95 with respect to the direction radial 4 to allow the connecting pin 54 to rest radially. For this purpose, the axial extensions 92, 92 have, for example, an L-shaped or U-shaped section, in the direction transverse to the axial direction 3. With respect to the axial direction 3, the radial cross member 70 is supported against the axial stops 72 of the fixing element 63. The axial extensions 92, 92 extend in the radial direction 4 so that they do not overlap in the radial direction 4. Thus, in the fastening element 63, in both circumferential directions 2 openings 98 have been made, from which the two branches 90, 91 emerge in the opposite peripheral directions 2 from the fastening element 63. In order to allow driving elements 58 to be mounted axially in the fastening elements 63, the openings 98 remain open upwards in the axial direction 3. The folds 100 of the branches 90, 91 with respect to the connecting pin 54 are radially juxtaposed but in axial planes of FIG. The two branches 90, 91 extend in different axial paths 76, 77 of the plastic body 62. FIG. 8 shows that the branches 90, 91 are located radially in the region of the stator teeth 14 and radially in the region of the stator teeth 14. the inside of the guide elements 44 of the insulating lamella 40. The three fastening elements 63 are evenly distributed in the peripheral direction 2 with an angular spacing of about 120 °. A fastener 63 has a larger width 85 in the circumferential direction 2 to provide a polarizer or rotational locking member. Thus, the two extensions 92, 93 have a U shape so that their free branches 87 are turned towards each other in the peripheral direction 2. The end faces 88 of the two branches 87 thus form the guide surfaces 106 in the circumferential direction 2 (which correspond to the first and the second guiding surface 74, 75) between which the connecting pin 54 is located. FIG. 2 shows an embodiment according to the invention of an insulating lamella 40 without the stator body 34. The radial insulator teeth 42 have grooves 43 to allow compact winding of the different coil portions 17. The axially extending and axially extending guide members 44 constitute the radial separation between the non-detailed coil portions 17 and the connecting cables 30, 31. The annular periphery 41 has axial through orifices 108 (for example three such orifices) in which nt penetrate spacers 84 not shown forming part of the wiring plate 52 to bear directly against the stator body 34. The insulating lamella 40 is also axially applied directly against the end face 39 of the stator body 34 formed by the lamella sheet 36 which is directly axially the outermost. The outer periphery 41 extends radially substantially to the outer periphery of the lamina package 35. The through holes 108 are radially open so that the spacer 84 can be applied against the radial edge Further outside the stator body 34. The edge 109 of the through hole 108 has complementary engaging members 111 in the form of undercuts 115 with which the corresponding fastening elements 110 of distance 84 form an attachment connection 112. The undercuts 115 are cut on the axial side of the insulating lamella 40, facing towards the stator body 34 to thus form a hooking surface against which the fastening elements 110 of the spacers 84 can be clamped with the hooks 113, axially against the stator body 34. The undercuts 115 extend for example in the peripheral direction 2 and It is preferable for the two opposite edges 109 in the circumferential direction 2. They extend in this embodiment not to the outer radial edge 41 of the insulating lamella 40. The through orifices 108 extend radially inwardly. and the undercuts 115 do not extend further inward than the outer periphery of the connecting cables 30, 31.
    [0009] After making the winding on the insulating lamella 40 of the stator body 34, a wiring plate 52 according to FIGS. 5 to 8 is inserted axially over the insulating lamella 40. The wiring plate 52 of FIG. 7 is represented on an enlarged scale again in FIG. 9 without the stator body 34. The free ends of the fixing segments 60 are made as in FIG. 5, in the form of loops 64 which are open before the mounting of the conductive elements 63 and surround the connecting cables 31 once the assembly is completed. As shown in Figure 9, the spacers 84 are formed in one piece with the fasteners 63, being formed axially facing them on the plastic body 62. The spacers 84 protrude from the annular plastic body 62 of the wiring plate 52 in the axial direction 3; the spacers are radially outside the plastic ring 62. They are connected in one piece by the supporting struts 66 against the wiring plate 52. By installing on the stator body 34, the spacers 84 overlap the connecting cables 30, 31 in the radial direction 4 to reach beyond them, axially in the through holes 108 of the insulating blade 40. Thus, the wiring range 52 can be supported with the connection pins 54 directly against the stator body 34 without any intermediate component. In the exemplary embodiment there are three fixing elements 63 and thus also three through holes 108 which are preferably evenly distributed around the periphery. The hooking elements 110 are made in one piece with the spacers 84. These hooking elements penetrate the complementary fastening elements 111 of the insulating strip 40 to fix the circuit board 52 reliably on the stator body 34.
    [0010] The hooking elements 110 are made in the form of elastic tongues 114 which extend in the axial direction 3 substantially parallel to the spacers 84 and which are elastic, in particular in the peripheral direction 2. There is thus an axial pin 116 which is pushed against the fastening element 110 during insertion into the passage opening 108. The free end of the fastening elements 110 comprises hooks 113 which, when the complete introduction of the spacer 84 hooks in the circumferential direction 2 behind the undercut portions 115 and formally connects in the axial direction. When the fastening elements 110 are thus installed so that two are oriented in peripheral directions 2, opposite, and cling with complementary fastening elements 111, the wiring plate 52 is also positioned safely relative to the peripheral direction 2 and exactly with respect to the sheet package 35. For example, only two spacers 84 each have precisely one fastening element and at least two through-holes 108 for each time forming two elements 113. In the exemplary embodiment, the third spacer 84 has no latching member 110 so that it can be manufactured more precisely in the peripheral direction 2, so that for example, in the circumferential direction 2, an exact fit with a third through-hole 108 for which a fastening element preferably has not been formed. 111. In the embodiment of FIG. 5, the through-orifices 109 are such that the outermost periphery 41 of the insulating lamella 44 comprises radial fixing struts 107 which position the spacing member. 84 in the circumferential direction 2. Thus, the radius of the periphery 41 is smaller than the radius of the stator body 34 so that the section of the spacer 84 adjusts radially due to this difference in Ray. In this embodiment, there is no fastening element 110 on the spacer 84 or complementary fastening element 113 on the insulating lamella 40. In this embodiment according to FIG. radius of the periphery 41 is substantially equal to the radius of the stator body 34 so that the through orifices 108 at the periphery 41 of the insulating lamella 44 are cut. The spacers 84 have fastening elements 110 which penetrate into the corresponding complementary coupling elements 113 of the through-holes 108. FIG. 10 shows the stator 10 housed in a motor housing 120. Preferably, it is frited in this one. Thus, from the point of view of the manufacturing technique, the front surface 39 of the stator body 34 is fixed at a defined distance 118, with respect to a reference surface 119 of the motor housing 120. Like the wiring plate 52 with the spacers 84 are directly against the front surface 39, the free ends 68 of the connecting pin 54 of the wiring plate 52 are at a predetermined distance 117 from the reference surface 119. Thus, a bearing panel 121 may be placed axially in a defined position relative to the reference surface 119 in the motor housing 120; the fastening elements 63 thus pass through the bearing cover 121 through passages 122. At least one passage 122 has a different contour to form a rotation orientation keying device and for example in the peripheral direction 2, it is wider than the two other passages 122. This manufacturing method makes it possible to have reproducible interfaces exactly for the control apparatus.
    [0011] NOMENCLATURE OF MAIN ELEMENTS 2 Peripheral direction 3 Axial direction 4 Radial direction Stator 11, 13 Motor half 14 Stator tooth 16 Electric coil 10 17 Coil part 18 Coil part 22 Coil cable 24 First winding cord 25 Second winding cord 26 Phase 28 Cable start 29 Cable end 30 Connecting cable 31 Short connecting cable 34 Stator housing 36 Sheet metal lamella 38 Flow return cylinder 39 Axial end face 40 Insulating lamella 41 Ring periphery 42 Insulator tooth 44 Element guide 45 Groove 46 Axial extension 47 Through-passage / radial passage 50 Labyrinth device 52 Wiring plate / connection plate 54 Sleeve pins 55 Clamping connection and knife 56 Connector 58 Conductor element, radially inner 59 Stamped part 60 Fixing segment 61 Closed ring 62 Plastic body 63 Fixing element 64 Loop 65 Free end 67 Axle ial 68 Free axial end 69 Notch 70 Cross-piece 72 Thrust bearing 74 First guide surface 75 Second guide surface 76, 77 Path 78 Middle segment 79 Rivet pin 80 Axial bore 81 Rivet head 82 Middle branch 83 Opposite surface 84 Body distance 85 Width 87 Free Branch 88 Front face 90 First leg 91 Second leg 92, 93 Axial extension 95 Supporting surface 96 U or L section 98 Opening 100 Fold 102 Radial offset 104 Radial extension 6 Guide surface 108 Through hole 109 Edge 110 Clamping element 111 Clamping 112 Clamping 113 Hook 114 Elastic tongue 115 Undercut 118 Axial distance 119 Reference surface 120 Engine housing 121 Bearing cover 122 Passage 20 21
    权利要求:
    Claims (3)
    [0001]
    Electric machine stator (10) having a stator body (34) with radial stator teeth (14) for receiving coil portions '17) of an electric winding (16), the end face (39) of the stator body (34) having an insulating lamella (40) with guide elements (44) for the connecting cables (30, 31) between the coil portions (17), a a separately manufactured wiring board (52) being installed axially on the insulating lamellae (40), this plate having conductive elements (58) for the electrical connection of the connecting cables (30, 31) to connectors (56) specific to the customers for a control apparatus, characterized in that the connection plate (52) bears against the end face (39) of the stator body (34) via spacers (84).
    [0002]
    2) Stator (10) according to claim 1, characterized in that the wiring plate (52) comprises a closed ring (61) in the form of a plastic body (62) provided in one piece with axially oriented fastening elements (63) which extend in the axial direction (3) and receive connecting pins (54) of the conductive elements (63) for connection to the connector (56), the spacers (84) being axially oriented in the opposite direction to the fasteners (63) and axially overlapping the ring (61).
    [0003]
    Stator (10) according to claim 1, characterized in that the closed ring (61) is located radially inside the guide elements (44) and the spacers (84) radially on the inside of the guide elements (44). outside the guiding elements (44) and the connecting cables (30, 31) passing therethrough.354 °) Stator (10) according to claim 1, characterized in that the spacers (84) are formed in the peripheral zone of the fastening elements (63) being connected in particular in one piece to the fastening elements (63) by support struts (66). Stator (10) according to claim 1, characterized in that the insulating lamella (40) has axial through-passages (108) through which the spacers (84) pass to be directly applied against the front surface (39), in particular without being applied axially against the insulating lamella (40). 6 °) Stator (10) according to claim 1, characterized in that the through holes (108) are cut in the outer radial periphery (41) of the insulating lamellae (40) and are preferably open radially outwardly. 7 °) Stator (10) according to claim 1, characterized in that the spacers (84) comprise hooking elements (110) which form a snap connection (112) with complementary fastening elements (111) of the insulating lamella (40). 8 °) Stator (10) according to claim 1, characterized in that the hooking elements (110) comprise elastic tongues (114) oriented in the axial direction (3) and whose free end is provided with a hook (113). 9 °) Stator (10) according to claim 1, characterized in that the complementary fastening elements (111) are formed in the form of an undercut (115) relative to the axial direction (3) at the edge (109) through orifices (108), and in particular the through hole (108) has an undercut (115) in the two opposite peripheral directions (2). 10 °) Stator (10) according to claim 1, characterized in that at its axial insertion into the through hole (108), the elastic tongue (114) is pressed in the peripheral direction (2) against the body of spacing (84) and in its fully installed position, it resiliently returns in the peripheral direction (2), opposite so that the hook (113) carries with the undercut (115) a connection by the shape in the axial direction. 11 °) Stator (10) according to claim 1, characterized in that two spacers (84) directly adjacent in the peripheral direction (2), each have at least one attachment element (110) and these elements d (110) are rotated towards each other or opposed to each other in the circumferential direction (2) to compensate for possible tolerances in the circumferential direction (2) between the insulating lamella (40) and the wiring plate (52). 12 °) Stator (10) according to claim 1, characterized in that the connector (58) has pins or is in the form of a bent pressed piece (59) with a knife clamping connection (55) extending axially in the fastening elements (63) and pressing axially against an axial abutment (72) of the fastening elements (63), middle segments (78) bent at approximately 90 ° to the conductive elements (58); extending in the circumferential direction (2) along the plastic body (62), preferably, the conductive elements (63) being fixed by a plastic transformation of the material of the plastic body (62) to the wiring plate (52) and connecting the securing segment (60) of the conductive elements (58) electrically to the connecting cables (30, 31) on the opposite side of the connector (58), preferably by soldering or brazing. 13 °) Stator (10) according to claim 1, characterized in that the stator body (34) is the assembly of several stator lamellae (36) superimposed, closed, in one piece, in the peripheral direction (2). ) and assembled as a pack of lamellae (35) and the front surface (39) is formed by an outer stator lamina (36), and preferably the stator lamellae (36) are shifted relative to each other in the circumferential direction (2) to form curved stator teeth (14). 14 °) Electrical machine (12) having a stator according to any one of claims 1 to 13, characterized in that the stator (10) is fixed in a cylindrical motor housing (120), the front surface (39) ) being at an exactly predefined axial distance (118) from a reference surface (119) of the motor housing (120) and at the same time the free ends (68) of the service pins (54) being positioned at an axial distance (117) predefined precisely with respect to the reference surface (119). 15 °) A method of manufacturing a stator (10) according to any one of claims 1 to 13, characterized in that one assembles an insulating lamella (40) axially on the front surface (39) of the stator body ( 34), then winding the stator body (34) with coil portions (18) and installing the connecting cables (30, 31) between the coil portions (18) in the guides (44) of the insulating lamellae (40), then the wiring plate (52) is assembled axially on the insulating lamella (40) on the stator body (34) so that the fastening elements (110) of the spacers (84) cling into the through holes (108) of the insulating lamellae (40) and block the wiring plate (52) on the stator body (34), then the conductive elements (58) of the cabling (52) to the connecting cables (30, 31), preferably by welding or brazing, then inserting the stator body (34) in the housing motor tier (120) at an exactly predefined axial distance (118) from the front surface (39) relative to a reference surface (119) of the motor housing (120), and then positioning the bearing cover axially relative to the reference surface (119) for closing the motor housing (120), the connecting pins (54) with the fastening elements (63) passing through the passageways (122) of the bearing cover (121) to exit of the case.20
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    同族专利:
    公开号 | 公开日
    JP2018501768A|2018-01-18|
    DE102015200089A1|2016-07-07|
    DE102015200089B4|2017-03-02|
    CN107112845B|2019-09-13|
    US20170366060A1|2017-12-21|
    JP6513203B2|2019-05-15|
    EP3243260A1|2017-11-15|
    CN107112845A|2017-08-29|
    WO2016110424A1|2016-07-14|
    US10630131B2|2020-04-21|
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    法律状态:
    2017-01-24| PLFP| Fee payment|Year of fee payment: 2 |
    2018-01-24| PLFP| Fee payment|Year of fee payment: 3 |
    2018-01-26| PLSC| Publication of the preliminary search report|Effective date: 20180126 |
    2020-01-23| PLFP| Fee payment|Year of fee payment: 5 |
    2021-01-20| PLFP| Fee payment|Year of fee payment: 6 |
    2022-01-18| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015200089.3A|DE102015200089B4|2015-01-07|2015-01-07|Stator for an electric machine and method of manufacturing such|
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