JP6308002B2 - Rotating electrical machine rotor - Google Patents

Description

  The present invention relates to a rotor of a rotating electric machine, and more particularly, to a rotating electric machine suitable for application to a rotating electric machine composed of a Landel-type pole core with which a rotor core of a rotor forms a pair, such as an alternator for an automobile The present invention relates to an electric rotor.

[Conventional technology]
Conventionally, automotive AC generators that have been widely used employ a Landel-type pole core as a rotor core (pole core), and combine a pair of Landel-type pole cores facing each other and a hollow portion formed between them A rotor coil (field coil) is fitted on the rotor, and the shaft is press-fitted and fixed to the shaft center.

  Further, the field coil constituting the rotor coil is wound around the winding bobbin in advance. The winding bobbin is made of an insulating material, and has a cylindrical winding drum portion around which the field coil is wound, and a flange portion extending radially outward from both ends of the winding drum portion. One flange portion is provided with a terminal wire locking portion for fixing (locking) the lead wire (terminal wire) on the winding start side and the winding end side of the field coil.

  The terminal wire locking portion is a main component of the rotor as means for carrying the terminal wire. Accordingly, various terminal wire locking portions have been proposed and put into practical use. Among them, the type in which the notch is provided and the terminal wire is inserted and locked is known as a representative example in which the structure of the winding bobbin itself is simple and easy to manufacture, and the assembling workability of the terminal wire is relatively good. (For example, refer to Patent Document 1).

  The winding bobbin described in Patent Document 1 has a terminal wire locking portion having a U-shaped groove protruding from the outer periphery of the flange portion, and the U-shaped groove is larger than the wire diameter of the terminal wire. An outer peripheral groove portion (first groove portion) having a small opening size, and an inner peripheral groove portion (second groove portion) provided continuously from the first groove portion to the inner peripheral side and having an opening size larger than that of the first groove portion. It consists of and. Therefore, when fixing the terminal line, the assembly can be completed simply by inserting the terminal line into the U-shaped groove.

  By the way, in a rotating electric machine mounted on a vehicle like an automotive alternator, various conditions such as mounting conditions, usage conditions, and price conditions are becoming more severe year by year. The environmental changes are remarkable, such as covering the terminal wires with insulation tubes to reinforce the strength and insulation performance of the wires themselves, and the assembly work of the terminal wires is forced to be automated by industrial robots in response to mass production systems.

[Problems of the prior art]
However, in the above-described terminal line locking structure that has been used so far, it is extremely difficult to respond immediately to such environmental changes from the points listed below.
(1) Covering the terminal wire with the insulating tube inevitably has a configuration in which the insulating tube is inserted into the terminal wire (insulated wire) in a loosely fitted state. For this reason, tolerance design for constructing a two-stage groove (first and second groove) structure considering the flatness of the insulating tube (the gap between the insulating tube and the terminal wire) is difficult. It is difficult to ensure stable fixation.
(2) When the terminal wire is accommodated in the groove portion, it is accommodated sequentially in the first and second groove portions while the insulating tube is crushed (flattened) or the insulating tube is forcibly pushed from the outside. However, unlike the case where there is no insulating tube, the assembly work must be quite complicated.

(3) In particular, when automating the assembly work of the terminal wires, when the automatic assembly by an industrial robot is assumed, while holding both ends of the insulation tube with the robot hand, the insulation tube is kept flat. It will be accommodated in the first and second grooves. For that purpose, not only a gripping space by the robot hand is required in the immediate vicinity of the terminal line locking part, but also a visual device or a pushing tool for accurately moving the robot hand so as not to damage the field coil itself in a narrow space. Ancillary facilities are also required. Therefore, the automation equipment must be large and expensive.

(4) Furthermore, when the automatic assembly process is examined in detail, the insulation tube itself has a hollow cross section and a relatively large gap with respect to the cross section of the inner terminal wire (insulated wire). While being flattened, it is accommodated in the first groove portion and transferred to the second groove portion, thereby restoring the state close to the original tube shape. Therefore, when the insulating tube is flattened, there is a possibility that the end portion of the insulating tube abuts against the bottom of the second groove portion, so that the complete accommodation of the entire terminal wire in the second groove portion may not be achieved. It is difficult to ensure stable fixation.

Japanese Patent Laid-Open No. 08-331786

  From the above, even if an insulation tube is inserted in the terminal wire or the assembly work of the terminal wire is automated, the terminal that can securely fix the terminal wire with a simple structure. Line locking means are eagerly desired.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide a simple structure of the winding bobbin itself regardless of the presence or absence of an insulating tube or the automatic assembly of terminal wires. In addition, an object of the present invention is to provide a rotor of a rotating electrical machine that is easy to manufacture, has excellent workability when assembling a terminal wire to a terminal wire locking portion, and can securely lock the terminal wire.

[Means of Claim 1]
The invention according to claim 1 (rotor of the rotating electrical machine) basically includes a rotor core fixed to the shaft, and a rotor coil wound around the rotor core via a winding bobbin. It is configured.
The winding bobbin has a cylindrical winding drum portion around which the rotor coil is wound, and flange portions extending radially outward from both ends of the winding drum portion. A terminal wire locking portion for locking the terminal wire of the child coil is provided.

In particular, in the present invention, the terminal wire locking portion is devised, the terminal wire locking portion has an opening into which the terminal wire can be inserted, and a holding portion that extends in the axial direction and holds the terminal wire. A slit that divides the holding portion in the circumferential direction is provided on the back side of the holding portion, and a split slit portion that expands and contracts the holding portion with the width of the slit is provided. The winding bobbin after inserting the terminal line holding portion that is assembled to the rotor core, the slit width of Sewari slit portion is narrowed, the terminal lines Ru locked in holding portion. Furthermore, the terminal line latching | locking part has comprised the overhang shape extended in an axial direction, while a holding part is bent in radial direction.

  According to the above configuration, when the terminal wire of the rotor coil is assembled to the terminal wire locking portion of the winding bobbin, the holding portion is in the expanded state by the spine slit portion, so the terminal wire is held by the holding portion. Can be accommodated easily and smoothly, and by narrowing the slit width of the split slit when the winding bobbin is assembled to the stator core, the holding part is reduced and the opening area is reduced. The terminal line can be securely held by the holding unit. In addition, when the terminal wire is assembled to the locking portion, the holding portion is in an expanded state, and the opening area of the holding portion can be freely selected, so there is no need to work while crushing the insulating tube. Even if there is a problem, the assembly work can be carried out without any problem even when the terminal lines are automatically assembled.

In addition, the terminal bobbin locking portion of the winding bobbin is a simple configuration in which the back slit slit portion is simply provided in the holding portion, and since it can be integrally formed when the winding bobbin is manufactured, the manufacturing is also simple, Since the width of the split slit portion can be narrowed by effectively utilizing the winding bobbin assembling step, the terminal wire can be firmly held by the holding portion with easy assembly.
Therefore, the structure of the winding bobbin itself is simple and easy to manufacture regardless of the presence or absence of the insulation tube and the automatic assembly of the terminal wire, and workability is also ensured when assembling the terminal wire to the terminal wire locking part. It is possible to provide a rotor of a rotating electrical machine that is excellent in that can securely lock a terminal wire.

It is a typical perspective view with which it uses for description of the basic composition of the rotor of the alternating current generator for motor vehicles which is a typical example of the rotary electric machine to which this invention is applied ( reference example 1 ). It is for demonstrating the principal part of the said rotor, and is an expanded sectional view along II-II of FIG. 1 ( reference example 1 ). It is a typical perspective view of the coil | winding bobbin which wound the rotor coil ( reference example 1 ). BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a specific embodiment of the present invention, in which (a) is an enlarged perspective view of a main part of a winding bobbin, and (b) a top view of the main part of the winding bobbin ( Reference Example 1 ). . In order to explain the terminal wire locking process in the winding bobbin, (a) is a rear view of the main part of the terminal wire locking part before the winding bobbin is assembled to the rotor core, (b). These are the back views of the principal part of the terminal line latching | locking part after an assembly | attachment ( reference example 1 ). FIG. 2 is a diagram for explaining another specific embodiment of the present invention, in which (a) is a perspective view of a terminal wire locking portion before the winding bobbin is assembled to the rotor core, and (b) is the same rotor. It is a top view of the terminal wire latching | locking part which shows the assembly | attachment relationship with an iron core ( reference example 2 ). FIG. 4 is a diagram for explaining another specific embodiment of the present invention, in which (a) is a perspective view of a terminal wire locking portion before the winding bobbin is assembled to the rotor core, and (b) is also assembled. It is a top view of the terminal wire latching | locking part which shows the relationship with the rotor core in front and back ( reference example 3 ). FIG. 4 is a diagram for explaining another specific embodiment of the present invention, in which (a) is a perspective view of a terminal wire locking portion before the winding bobbin is assembled to the rotor core, and (b) is also assembled. It is a top view of the terminal wire latching | locking part which shows the relationship with the rotor core in front and back ( reference example 4 ). FIG. 7 is an enlarged cross-sectional view of a main part of a rotor for explaining another specific embodiment of the present invention ( Example 1 ).

  Hereinafter, the best mode for carrying out the present invention will be described in detail according to embodiments shown in the drawings.

Real施例, on behalf of the application of the present invention shows a rotor of an automotive alternator (alternator). In the following description, first, the basic configuration of the rotor of the automotive alternator is outlined, then the reference examples and examples are sequentially described, and finally the effects of the feature points of the present invention are summarized and listed.
Note that, in the reference examples and examples shown in the drawings, the same or equivalent parts are denoted by the same reference numerals, and redundant description is omitted.

  First, an overall configuration of a rotor of an automotive alternator to which the present invention is applied will be outlined based on FIG. 1 and FIG.

[Basic configuration of rotor 1]
The rotor 1 is rotatably supported by a frame of an AC generator (not shown), is rotationally driven by an internal combustion engine (engine) mounted on the vehicle, and operates as a field element for power generation. As shown in FIG. 1, the rotor 1 includes a shaft 2 that is rotationally driven by an engine, a pair of Landel-type pole cores (rotor cores) 3 and 4 that are press-fitted and fixed to the shaft 2, and these pole cores. 3 and 4 are mainly composed of a field coil (rotor coil) 6 wound around a winding bobbin 5 and a cooling fan (not shown) fixed to axial end faces of the pole cores 3 and 4. Yes.

The pair of pole cores 3 and 4 have the same shape, boss portions 7 and 8 arranged coaxially with the shaft 2, and a disk portion extending radially from one axial end face of the boss portions 7 and 8 in a radial direction. 9 and 10 and claw portions 11 that are bent from the outer peripheral portions of the disk portions 9 and 10 in the axial direction to form field magnetic poles. V-shaped grooves (V grooves) 12 are formed in the disk portions 9 and 10 between the adjacent claw portions 11 and the claw portions 11, that is, in the valley portions between the claw portions.
The pair of pole cores 3 and 4 are assembled in a state where the plurality of claw portions 11 are alternately meshed with each other, and the boss portions 7 and 8 and the disk portions 9 and 10 of the pole cores 3 and 4 The field coil 6 wound around the winding bobbin 5 described above is accommodated in the hollow portion surrounded by 11.

The winding bobbin 5 is an insulating bobbin formed of an insulating material. The winding bobbin 5 has a U-shaped cylindrical body as shown in FIG. 2, and has a cylindrical winding body 13 around which the field coil 6 is wound, and the winding body 13. And two flat plate-like flange portions 14 extending radially outward from both axial ends. On the outer side of the end face of one flange portion 14, terminal line locking portions 15 (hereinafter referred to as locking portions 15) that protrude in the axial direction are provided at two opposing positions (axisymmetric positions). (See FIG. 3). The latching portion 15 latches the lead wire 16a on the winding start side and the lead wire 16b on the winding end side drawn from the field coil 6, and the two latching portions 15 are substantially the same. It has a similar structure.
Thus, the winding bobbin 5 is sandwiched between the pair of pole cores 3 and 4 such that the two locking portions 15 are positioned in the V groove 12 in the claw portion valley portion.
The details of the remaining configuration of the winding bobbin 5 will be described in detail in each embodiment to be described later, focusing on the specific configuration of the locking portion 15.

  In the field coil 6 wound around the winding bobbin 5, the lead wire 16a on the winding start side and the lead wire 16b on the winding end side are drawn from an axially symmetric position around the shaft 2 (FIG. 3). (See FIG. 1), after being locked to the locking portion 15 of the winding bobbin 5, it is further drawn out and laid in a groove portion 17 provided radially in the radial direction along the end face of one pole core 3.

A pair of slip rings 20 and 21 are provided at one end of the shaft 2. The slip rings 20 and 21 are electrically connected to a pair of connection terminals 22 and 23, respectively. The pair of connection terminals 22 and 23 are soldered to the end portions of the lead wires 16a and 16b described above, that is, the tip portions of the lead wires 16a and 16b laid in the groove portion 17 along the end surface of the pole core 3. It is electrically connected by a joining means such as.
Thereby, the field coil 6 is electrically connected to each of the slip rings 20 and 21 by the respective lead wires 16a and 16b.

  A cooling fan (not shown) is fixed to both end faces in the axial direction of the pole cores 3 and 4 by welding or the like, and generates cooling air that cools the stator or the like of the AC generator as the rotor 1 rotates. . Further, the cooling fan fixed to the end face of one pole core 3 has a shape that does not interfere with the groove portion 17 that accommodates the lead wires 16a and 16b formed on the end face and is arranged in the radial direction. Of course, it is presented.

The lead wires 16a and 16b are formed of insulated wires such as enamel wires whose core wires are element wires of the field coil 6, but are drawn out from the field coils 6 to the core wires for protection and the like. The insulating tube 18 is inserted over almost the entire length from the root portion to the connection terminals 22 and 23. Therefore, the lead wire in the present embodiment means a lead wire (terminal wire) with an insulating tube 18 having a structure covered with the insulating tube 18 over the entire length unless otherwise specified.
In the following description, only when the leader line (terminal line) is distinguished between the winding start side and the winding end side, they are referred to as the winding start side lead line 16a and the winding end side lead line 16b, respectively. Are collectively referred to by the terminal line 16.
Further, as described above, the two locking portions 15 are arranged in axial symmetry with a substantially similar structure, and the lead lines 16a and 16b also have a substantially similar structure. In the description of the case where the lead wires 16 a and 16 b are locked to the locking portion 15, the lead wire 16 b on the winding end side is handled as a representative of the terminal wire 16.

( Reference Example 1 )
[Basic configuration of winding bobbin 5 and features of Reference Example 1 ]
Next, detailed structure of the winding bobbin 5 itself, and, the peripheral configuration of such pole cores 3 and 4 associated with the structure of the winding bobbin 5 will be described with reference to FIGS.

The winding bobbin 5 is an integrally molded product molded by an insulating material having elasticity such as nylon resin, for example, and has an overall structure as shown in FIG.
That is, the winding bobbin 5 includes a cylindrical winding drum portion 13 around which the field coil 6 is wound, and two flat flange portions 14 extending radially outward from both axial ends of the winding drum portion 13. As described above, the basic structure having the above is provided with the petal portions 19 radially projecting radially on the outer peripheral side of each flange portion 14.
The petals 19 are provided in the same number as the claw portions 11 of the pole cores 3 and 4 (six in the first reference example ), and when assembled to the pole cores 3 and 4, as shown in FIG. It is elastically deformed along the side surface. The petal portion 19 helps to reinforce the field coil 6 wound around the winding bobbin 5 mechanically and electrically.
In addition, on the outer side of the end face of the one flange portion 14, there are two opposing positions (axisymmetric positions) in the valley region between the petal portions 19 (region corresponding to the V groove 12 of the pole cores 3 and 4). A locking portion 15 is provided.
In the field coil 6 wound around the winding bobbin 5, the terminal wires 16 on the winding start side and the winding end side are respectively drawn out through the locking portions 15.

Each locking portion 15 has substantially the same structure, and is formed so as to protrude outward from the end face of the flange portion 14 in both the circumferential direction and the axial direction. As shown in FIG. 4, the holding portion 30, the split slit portion 40, and the snap portion 50 are included .

The holding portion 30 is formed to protrude (extend) from the end surface of the flange portion 14 in the axial direction, and includes a column portion 31 and a cylindrical portion 32 provided at the tip thereof. The cylindrical portion 32 substantially forms a cylindrical body as a whole so that the terminal line 16 can be accommodated along the axis. And the opening 33 is provided in the cylinder part 32 along the axial direction so that the terminal wire 16 can be inserted from the outside.
Therefore, the terminal wire 16 can be accommodated and held by the holding portion 30 by inserting the terminal wire 16 into the tube portion 32 from the opening 33.

The spine slit portion 40 has a slit 41 having a predetermined width provided along the axial direction on the back side of the holding portion 30, that is, on the opposite side of the opening 33. The entire holding unit 30 including the two is divided into two in the circumferential direction.
As shown in FIG. 5, the slit 41 has a circular hole 42 having a diameter larger than the slit width at the end portion (the root portion of the holding portion 30) as in the case of the cutting structure of the pen tip. The slit width can be enlarged or reduced using as a fulcrum. And the function which expands / reduces the opening area of the cylinder part 31 (opening 32) of the holding part 30 is achieved by expansion / contraction of this slit width.
For example, when the width of the slit 41 is the maximum width in the fully opened state as shown in FIG. 5A, the opening 33 is expanded to the maximum, and the insulating tube 18 is easily inserted into the cylindrical portion 32 from the opening 33. be able to. On the contrary, when the width of the slit 41 is reduced as shown in FIG. 5B, the opening 33 of the cylindrical portion 31 is reduced, so that the gripping condition of the terminal line 16 in the cylindrical portion 32 can be adjusted. Therefore, the slit 41 has a maximum width appropriately selected according to the outer diameter of the insulating tube 18 and a reduced width appropriately selected according to the locking strength of the terminal line 16 required by the cylindrical portion 32.

The snap portion 50 is formed to bulge outward from the end face of the flange portion 14 in the axial direction. The snap portion 50 has a so-called “peco plate” structure in which the thickness thereof is substantially the same as the thickness of the flange portion 14 and the inside is hollow.
And the snap part 50 is provided so that it may be located in the both sides of the circumferential direction of the holding part 30 especially so that the holding part 30 may be surrounded. In Reference Example 1 , the holding portion 30 is constructed on the upper surface of the snap portion 50. Therefore, when the snap part 50 is elastically deformed in the end face direction of the flange part 14 and becomes flat, the width of the slit 41 of the dorsal slit part 40 is narrowed by the snap action effect (see FIG. 5B) and held. The opening area of the cylindrical portion 32 (opening 33) of the portion 30 is also reduced.

The winding bobbin 5 is sandwiched between the pair of pole cores 3 and 4 from both ends when the winding bobbin 5 is assembled into the hollow portions of the pair of pole cores 3 and 4. The snap portion 50 is deformed into a flat state (see FIG. 5B).
Further, the snap portion 50 is formed with an inclined surface 51 that smoothly connects to the end surface at a boundary portion with the end surface of the flange portion 14 so as to obtain a smooth snap action effect.
The snap portion 50 is provided with a slit 52 so that the terminal wire 16 can be guided to the opening 33 of the holding portion 30.

In the above configuration, the process of locking the terminal wire 16 of the field coil 6 to the locking portion 15 of the winding bobbin 5 will be described.
(1) The field coil 6 is wound around the winding bobbin 5 in advance, and the terminal wire 16 is pulled out via the locking portion 15 (see FIG. 3).
At this time, the terminal line 16 is accommodated in the cylindrical portion 32 of the holding portion 30 from the slit 52 of the snap portion 50 via the opening 33, while the slit 41 of the spine slit portion 40 is shown in FIG. As such, it has the maximum width. Therefore, since the opening 33 of the cylindrical portion 32 is in the maximum expanded state by the slit 41 and has a sufficient opening area larger than the outer diameter of the insulating tube 18, the terminal wire 16 can be easily combined with the insulating tube 18. It can be inserted into the cylindrical portion 32.

(2) Subsequently, the winding bobbin 5 around which the field coil 6 is wound is assembled into the pole cores 3 and 4 so as to be sandwiched between the pair of pole cores 3 and 4 from both ends thereof.
The winding bobbin 5 is sandwiched between the pole cores 3 and 4 without a gap, and the snap portion 50 is pressed from the axial direction by the pole core 3 as shown in FIG. In the process, the snap portion 50 having a peco plate structure is elastically deformed in the direction of the end face of the flange portion 14 and becomes flat. Due to the elastic deformation of the snap portion 50, as shown in FIG. 5B, the width of the slit 41 of the split slit portion 40 is narrowed, and the opening area of the cylindrical portion 32 (opening 33) of the holding portion 30 is reduced. The
As a result, the hollow cross-sectional area of the cylindrical portion 32 becomes smaller than the outer diameter (hollow cross-sectional area) of the insulating tube 18 and the insulating tube 18 is appropriately crushed (flattened). 32 can be gripped and fixed with a required locking strength.
(3) Thus, the lead wire 16 securely locked to the locking portion 15 is laid in the groove 17 on the end face of the pole core 3 and is electrically connected to the pair of connection terminals 22 and 23.

[Effect of Reference Example 1 ]
According to the said structure, there exist the following effects.
(1) When the terminal wire 16 of the field coil 6 is locked to the locking portion 15 of the winding bobbin 5, initially, the slit width of the split slit portion 40 is the maximum width and the holding portion 30 is in the expanded state. Therefore, the terminal wire 16 can be easily and smoothly accommodated in the holding portion 30 together with the insulating tube 18 without crushing (flattening) the insulating tube 18.
(2) Next, when the winding bobbin 5 is assembled to the pole cores 3 and 4, the snap part 50 is pressed by the pole core 3 to narrow the slit width of the split slit part 40, thereby reducing the opening area of the holding part 30. The terminal wire 16 can be held by the holding unit 30 by reducing the size.
As described above, since the slit width of the split slit portion 40 can be narrowed by effectively utilizing the assembly process of the winding bobbin 5, the assembly portion can be easily assembled and the holding wire 30 can be firmly held by the holding portion 30. Can do.

(3) Further, the locking portion 15 of the winding bobbin 5 has a simple configuration in which only the spine slit portion 40 is provided in the holding portion 30 and can be integrally formed when the winding bobbin 5 is manufactured. Even simple.
(4) When the terminal wire 16 is initially assembled to the locking portion 15, it is only necessary to insert the terminal wire 16 into the holding portion 30 in the expanded state, and the expansion space can be freely selected. Therefore, even if the insulating tube 18 is present, it is not necessary to perform the operation while crushing the insulating tube 18 (while making it flat). Therefore, the initial assembly of the terminal wire 16 to the locking portion 15 can be easily performed without being affected by the presence or absence of the insulating tube 18. In addition, since the insulating tube 18 itself is not flattened, the problems listed in the section [Problems of the prior art] (see the paragraphs (3) and (4)) also when the terminal wire 16 is automatically assembled by an industrial robot. Can be implemented without incurring any of the above.

(5) Therefore, the structure of the winding bobbin 5 itself is simple and easy to manufacture regardless of the presence or absence of the insulating tube 18 and the automatic assembly of the terminal wire 16, and the assembly workability of the terminal wire 16 is excellent. It is possible to provide the rotor 1 that can securely fix the terminal line 16.

(6) The snap portion 50 is an effective means for reducing the slit width of the spine slit portion 40. In the snap portion 50, an inclined surface 51 is formed at a boundary portion with the end surface of the flange portion 14 so as to be smoothly connected to the end surface. Thereby, the snap part 50 exhibits the snap action effect while the boundary part with the end surface of the flange part 14 is elastically deformed smoothly and stably. Accordingly, the snap portion 50 is not damaged such as a crack or breakage.

( Reference Example 2 )
Next, Reference Example 2 will be described with reference to FIG.
Reference Example 2 is different from the reference example 1, a partial modification of the structure of the engaging portion 15, the other is the same as in Reference Example 1.

The locking portion 15 of Reference Example 2 is characterized by a slit structure provided in the spine slit portion 40, and the L split slit portion 40 is provided with an L-shaped slit 43.
Compared with the slit 41 of Reference Example 1 , the slit 43 was further extended from the root portion of the locking portion 15 to the inner diameter side of the end surface of the flange portion 14 (snap portion 50), as shown in FIG. It is L-shaped. Moreover, as shown in FIG. 6B, the slit 43 is opened so as to be connected to the slit 52 of the snap portion 50. Therefore, the slit 43 is completely open regardless of the snap portion 50 over the entire length of the L shape.
The slit 43 is provided with a circular hole 44 having a diameter larger than the slit width at the L-shaped end portion.

According to the locking portion 15 having the above-described configuration, when the winding bobbin 5 is assembled to the pole cores 3 and 4 as in the first reference example , the snap portion 50 is moved from the axial direction by the pole core 3 as shown in FIG. In the process of assembling the winding bobbin 5, the snap part 50 having a peco-plate structure is elastically deformed toward the end face of the flange part 14, and the slit of the spine slit part 40 is caused by the elastic deformation of the snap part 50. 43 is narrowed, and the opening area of the cylinder part 32 (opening 33) of the holding part 30 is reduced.

Here, the slit 43 of the spine slit portion 40 exhibits the following effects.
The slit 43 is longer than the slit 41 of the reference example 1 by the length of the slit 43 extended in an L shape. Thereby, since the distance (free length) to the slit 43 front-end | tip which uses the circular hole 44 as a fulcrum becomes long, the back split slit part 40 can take the expansion / contraction width of the slit 43 large. Further, the load required to narrow the width of the slit 43 is reduced, and the stress applied to the locking portion 15 can be reduced.
Accordingly, the degree of freedom in designing the locking portion 15 is increased, and the assembling property of the terminal line 16 can be further improved.

( Reference Example 3 )
Next, Reference Example 3 will be described with reference to FIG.
Reference Example 3 is different from the reference example 1 and 2, a modification of the means for narrowing the slit width of the locking portion 15, the other is substantially the same as Reference Examples 1 and 2.

In Reference Examples 1 and 2 , the snap portion 50 is specially provided as means for narrowing the slit width of the split slit portion 40 in the locking portion 15. On the other hand, Reference Example 3 shows an example of means for narrowing the slit width of the spine split slit portion 40 without providing the snap portion 50 and effectively using the assembly process of the winding bobbin 5.

In Reference Example 3 , as shown in FIG. 7A, the locking portion 15 of the winding bobbin 5 is constructed by two constituent elements of a holding portion 30 and a back split slit portion 40.
The spine slit portion 40 is provided with a slit 41 (or slit 43) having a predetermined width for expanding and contracting the opening 33 of the holding portion 30. The slit 41 (or slit 43) includes the cylindrical portion 32. The entire holding unit 30 is divided into two in the circumferential direction. The flange portion 14 is provided with a slit 52 so that the terminal wire 16 can be guided to the opening 33 of the holding portion 30.
Then, as shown in FIG. 7B, when the winding bobbin 5 is assembled to the pole cores 3 and 4, the locking portion 15 is positioned at the V groove 12 of one of the pole cores 3 and pushed in.

In Reference Example 3 , using this assembly relationship, the assembly dimension tolerance between the locking portion 15 and the V-groove 12 is set so that the slit width of the spine slit portion 40 is reduced by a predetermined amount when the assembly is completed. Selected.
That is, one pole core 3 has a V groove 12 into which the locking portion 15 is press-fitted and fitted when the winding bobbin 5 is assembled, and the locking portion 15 is press-fitted into the V groove 12. Thus, since the spine slit portion 40 is elastically deformed so as to narrow the slit width, the width of the slit 41 (or the slit 43) is reduced.
FIG. 7 (b) shows the state of the locking portion 15 before and after assembly to the pole cores 3 and 4. The solid line is the state before assembly to the pole core 3 (4), and the broken line is the pole core 3 ( The state after assembly to 4) is shown.
Therefore, according to the above configuration, the process of assembling the winding bobbin 5 to the pole cores 3 and 4 is effectively utilized, the slit width of the split slit portion 40 is narrowed, and the terminal wire 16 is locked to the locking portion 15. be able to.

( Reference Example 4 )
Next, Reference Example 4 will be described with reference to FIG.
The reference example 4 is also a modification of the means for narrowing the slit width of the locking portion 15 as compared to the reference examples 1 and 2 , and the assembly process of the winding bobbin 5 is effective without providing the snap portion 50. Another example of means for narrowing the width of the slit 41 (or slit 43) formed in the spine slit portion 40 by utilizing it will be described.

The reference example 4 uses elastic deformation of the petal portion 19 provided in the flange portion 14 as means for narrowing the slit width of the spine split slit portion 40.
As shown in FIG. 8A, the locking portion 15 of the winding bobbin 5 is composed of two components, a holding portion 30 and a back split slit portion 40, as in Reference Example 3 .
When the winding bobbin 5 is assembled to the pole cores 3 and 4, the petals 19 are elastically deformed in the axial direction and in an arc shape as shown in FIG. Since the inner surface is also inclined in the circumferential direction, the petal portion 19 is displaced in the circumferential direction as indicated by the white arrow shown in FIG. In this embodiment, this displacement is utilized. As shown in FIG. 8B, a displacement such as a white arrow is generated, so that the width of the slit 41 (or slit 43) of the spine slit portion 40 is reduced. A predetermined amount is reduced from the solid line state to the broken line state.
Therefore, also in the reference example 4 , the process of assembling the winding bobbin 5 to the pole cores 3 and 4 is effectively utilized, the slit width of the split slit portion 40 is narrowed, and the terminal wire 16 is locked to the locking portion 15. be able to.

( Example )
Next, an example which is another embodiment of the present invention will be described with reference to FIG.
Real施例is different from the reference example 1-4, a modification of the structure of the locking portion 15, the other is the same as in Reference Example 1-4.

The locking portion 15 of the real施例has no overhang shape extending in the axial direction while the bent holding portion 30 in the radial direction.
Specifically, in the holding part 30, the column part 31 that supports the cylindrical part 32 is bent so as to protrude outward in the radial direction, and the cylindrical part 32 is provided at the tip thereof.
In addition, although structures other than said holding part 30 are abbreviate | omitting illustration, of course, it is the same as any of the reference examples 1-4 .

According to the locking portion 15 configured as described above, the support column portion 31 of the holding portion 30 is bent, and the creepage length of the holding portion 30 itself, that is, the substantial length of the holding portion 30 is determined. The protrusion length in the axial direction of the stop 15 itself can be increased without increasing the length. Thereby, since the distance (free length) to slit 41 and 43 tip which uses circular holes 42 and 44 as a fulcrum becomes still longer, the expansion / contraction width of slits 41 and 43 can be taken larger. Moreover, the load required for narrowing the width of the slits 41 and 43 is further reduced, and the stress applied to the locking portion 15 can be further reduced.
Therefore, the design freedom of the locking portion 15 is further increased, and the assembling property of the terminal line 16 can be further improved.
In addition, since the radial position of the cylinder part 32 can be adjusted by making the holding part 30 into an overhang shape, it becomes easy to avoid interference with the pole core 3.

( Supplementary explanation )
Next, the extended state of the terminal line in Examples and the like, supplementary explanation with reference to FIG. 4 (b).
As already described in the above reference example and the like, the flange 14 (snap portion 50) is provided with a slit 52 so that the terminal wire 16 can be guided to the opening 32 of the holding portion 30.
The slit 52 is formed in a “shape” in which the first inclined hole 52 a and the second inclined hole 52 b are connected in different directions.
Therefore, since the terminal line 16 first enters the first inclined hole 52a obliquely so as to be opposite to the winding direction, the terminal line 16 is difficult to come out. And since it is guided in the opposite direction with respect to the second inclined hole 52b, it becomes difficult to return to the first inclined hole 52a, and eventually it can be guided to the opening 33 well.

[Modification]
The present invention can be variously modified without departing from the spirit of the invention , and its modifications are exemplified.

(1) In the above-described embodiments and the like , a so-called Landel-type pole core is used which is disposed so as to mesh with a pair of pawl cores 3 and 4 having the same shape as the rotor core. A so-called tandem pole core in which two pole cores are skewered on the shaft 2 with the winding bobbin 5 in between may be adopted.

(2) In the above-described embodiment and the like , the terminal wire 16 is covered with the insulating tube 18 over almost the entire length from the root portion drawn from the field coil 6 to the connection terminals 22 and 23. Although the mechanical and electrical insulation strength of 16 is increased, it is needless to say that the present invention can be applied to a structure that does not require the insulation tube 18.
For the purpose of locking the terminal wire 16 with the locking portion 15, when the terminal tube 16 is covered with the insulating tube 18, at least the region locked with the locking portion 15 is covered with the insulating tube 18. It is important.

(3) In the above-described embodiment and the like , in the locking portion 15, the holding portion 30 itself is configured by the column portion 31 and the cylindrical portion 32 provided at the tip thereof, but the entire holding portion 30 is the cylindrical portion 32. You may make it comprise with.
(4) Moreover, in the latching | locking part 15, since the dimensional relationship of the holding part 30 and the back split slit part 40 has an inseparable relationship which can adjust the opening area of the holding part 30 with the slit width of the back split slit part 40. Of course, the presence or absence of the insulating tube 18, the diameter of the terminal wire 16, the ease of insertion into the holding portion 30, the locking strength of the terminal wire 16, and the like can be freely selected.
(5) Further, in order to further improve the mechanical / electrical insulation performance of the terminal wire 16, in addition to the insulating tube 18, a resin impregnation means is used in combination to fill the gap between the terminal wire 16 and the insulating tube 18. Of course it is also possible.
(6) Further , the case where the present invention is applied to the rotor 1 of an automotive alternator (alternator) G has been described. However, the present invention is not limited to this, and a terminal wire from a rotor coil wound around a winding bobbin is wound. It can be applied to a rotor of a rotary electric machine of a type that is locked to a bobbin, and the same operational effects can be obtained.

  The features and effects of the present invention that have been described in detail above will be summarized as follows according to each means described as a dependent claim in the scope of claims.

(Feature 1 = Means of claim 2)
In the rotor 1 of the rotary electric machine according to claim 1,
The terminal wire 16 is fitted with an insulating tube 18 for insulatingly covering the terminal wire 16 at least in a region locked by the terminal wire locking portion 15, and the insulating tube 18 is held together with the terminal wire 16. it you are characterized that are holding the parts 30.
According to the above means, the terminal wire 16 can be insulated and protected by the insulating tube 18 at least in the region locked by the terminal wire locking portion 15.

(Feature point 2 = Means of claim 3)
In the rotor 1 of the rotary electric machine according to claim 1 or 2,
Sewari slit portion 40, slits, particularly, you are characterized by being an L-shaped slit 43 which is extended toward the inner peripheral side of the flange portion 14 from the root portion of the engaging portion 15.
According to the above configuration, as shown in Reference Example 2, the entire length of the slit 43 can be made longer than the slit 41 of Reference Example 1 by an amount that is extended in an L shape. Can be taken big. Further, the load required to narrow the width of the slit 43 is reduced, and the stress applied to the locking portion 15 can be reduced.
Accordingly, the degree of freedom in designing the locking portion 15 is increased, and the assembling property of the terminal line 16 can be further improved.

(Feature point 3 = Means of claim 4)
In the rotor 1 of the rotary electric machine according to any one of claims 1 to 3,
The winding bobbin 5 has snap portions 50 that are bulged outward from the end face of the flange portion 14 in the axial direction on both sides in the circumferential direction where the locking portions 15 of the flange portion 14 are located. by elastically deforming the end face direction of the flange portion 14 when the part 50 is assembled to the pole core (rotor core) 3,4, that are characterized by the width of Sewari slit portion 40 is narrowed.
According to the above means, the assembly process of the winding bobbin 5 can be effectively utilized, and the slit width of the spine slit portion 40 can be actively narrowed using the snap action of the snap portion 50, so that the assembly is easy. Thus, the terminal wire 16 can be accurately grasped and locked to the holding portion 30.

(Feature point 4 = Means of claim 5)
In the rotor 1 of the rotary electric machine according to claim 4,
Snap 50, it is characterized by boundary portion between the end surface of the flange portion 14 is formed in the inclined surface 51 to smoothly connect to the end face.
According to the above means, the snap part 50 has a boundary between the end face of the flange part 14 and exhibits a snap action effect smoothly and stably, so that the snap part 50 is not damaged such as a crack.

(Feature point 5 = Means of claim 6)
In the rotor 1 of the rotary electric machine according to any one of claims 1 to 3,
The rotor core 3 has a groove portion (V groove 12) into which the terminal wire locking portion 15 is press-fitted when the winding bobbin 5 is assembled. The terminal wire locking portion 15 is a groove portion (V groove 12). ) to by press fit, that are characterized by a slit width of Sewari slit portion 40 is narrowed.
According to the above means, since the slit width of the split slit portion 40 can be narrowed by effectively utilizing the assembly process of the winding bobbin 5, the terminal wire 16 is firmly held by the holding portion 30 with easy assembly. Can be made.

(Feature point 6 = Means of claim 7)
In the rotor 1 of the rotary electric machine according to any one of claims 1 to 3,
The winding bobbin 5 has a petal portion 19 that is elastically deformed when assembled to the pole cores (rotor cores) 3 and 4 on the outer peripheral side of the flange portion 14. slit width parts 40 that are characterized in that the narrowed.
According to the above means, since the slit width of the split slit portion 40 can be narrowed by effectively utilizing the assembly process of the winding bobbin 5, the terminal wire 16 is firmly held by the holding portion 30 with easy assembly. Can be made.

(Feature point 7 = Means of claim 1 )
Locking portion 15 is characterized in that form an overhang shape extending in the axial direction while the bent holding portion 30 in the radial direction (exemplary Lathan irradiation).
According to the above means, the creeping length of the holding part 30 itself, that is, the substantial length of the holding part 30 can be increased without increasing the protruding length in the axial direction. Accordingly, since the effective length of the slits 41 and 43 can be increased, the expansion / contraction width of the slits 41 and 43 can be increased. Moreover, the load required to narrow the widths of the slits 41 and 43 is reduced, and the stress applied to the locking portion 15 can be reduced.
Therefore, the design freedom of the locking portion 15 is increased, and the assembling property of the terminal line 16 can be further improved.

DESCRIPTION OF SYMBOLS 1 ... Rotor, 2 ... Shaft, 3, 4 ... Pole core (rotor core), 5 ... Winding bobbin, 6 ... Field coil (rotor coil), 13 ... Winding body part, 14 ... Flange part, 15 ... Terminal line locking part, 16 ... terminal line, 30 ... holding part, 33 ... opening, 40 ... spine slit part, 41, 43 ... slit, 50 ... snap part.

Claims (7)

A rotor core (3, 4) fixed to the shaft (2) and a rotor coil (6) wound around the rotor core (3, 4) via a winding bobbin (5) are provided. In the rotor (1) of the rotating electric machine
The winding bobbin (5) includes a cylindrical winding drum portion (13) around which the rotor coil (6) is wound, and flange portions extending radially outward from both ends of the winding drum portion (13). 14)
The flange portion (14) is provided with a terminal wire locking portion (15) for locking the terminal wire (16) of the rotor coil (6),
The said terminal wire latching | locking part (15) has the opening (33) which can insert the said terminal wire (16), and is extended in an axial direction and holds the said terminal wire (16) (30) And a slit (41, 43) for dividing the holding part (30) in the circumferential direction on the back side of the holding part (30), and the width of the slit (41, 43) (hereinafter referred to as slit). A split slit portion (40) that expands and contracts the holding portion (30) according to the width).
The winding bobbin (5) is assembled to the rotor core (3, 4) after the terminal wire (16) is inserted into the holding part (30) from the opening (33), so that the spine The slit width of the slit portion (40) is narrowed, and the terminal wire (16) is locked to the holding portion (30) ,
The terminal wire locking portion (15) is a rotor of a rotating electrical machine characterized in that the holding portion (30) has an overhang shape that extends in the axial direction while bending in the radial direction . In the rotor (1) of the rotating electrical machine according to claim 1,
The terminal wire (16) is fitted with an insulating tube (18) that insulates the terminal wire (16) at least in a region locked by the terminal wire locking portion (15).
The insulating tube (18) is held by the holding portion (30) together with the terminal wire (16). In the rotor (1) of the rotating electrical machine according to claim 1 or 2,
The split slit portion (40) is an L-shaped slit in which the slits (41, 43) are extended from the root portion of the terminal wire locking portion (15) to the inner peripheral side of the flange portion (14). (43) The rotor of the rotary electric machine characterized by the above-mentioned. In the rotor (1) of the rotating electrical machine according to any one of claims 1 to 3,
The winding bobbin (5) bulges outward in the axial direction from the end face of the flange portion (14) on both sides of the flange portion (14) in the circumferential direction where the terminal wire locking portion (15) is located. Having a snap-out portion (50) formed;
When the snap portion (50) is assembled to the rotor core (3, 4), the slit width of the dorsal slit portion (40) is narrowed by elastic deformation in the end face direction of the flange portion (14). A rotor for a rotating electric machine, In the rotor (1) of the rotating electrical machine according to claim 4,
The rotor of a rotating electrical machine, wherein the snap portion (50) is formed with an inclined surface (51) that smoothly connects a boundary portion with the end surface of the flange portion (14) to the end surface. In the rotor (1) of the rotating electrical machine according to any one of claims 1 to 3,
The rotor core (3, 4) has a groove (12) into which the terminal wire locking portion (15) is press-fitted when the winding bobbin (5) is assembled,
The rotor of the rotating electrical machine, wherein the slit width of the split slit portion (40) is narrowed by press fitting the terminal wire locking portion (15) into the groove portion (12). The rotor (1) of the rotating electrical machine according to any one of claims 1 to 3, wherein the winding bobbin (5) is arranged on the rotor core (3) on an outer peripheral side of the flange portion (14). 4) having a petal portion (19) that is elastically deformed when assembled to
The rotor of a rotating electrical machine, wherein the slit width of the split slit portion (40) is narrowed by elastic deformation of the petal portion (19) .

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