JPH0641364U - Stator for generator - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the connection between the lead wire from the generator coil and the output cord from vibrating and breaking in the protective tube. [Structure] Leader wire from power generating coil and output cords 6a to 6
The output cord lead-out portions 8a to 8c are formed by covering the connecting portions with the protective tubes 7a to 7c, respectively. The output code derivation units 8a to 8c are protection tubes 7a to 7c.
Is substantially orthogonal to the radial direction of the stator core 1, and both ends of each protective tube are provided with a gap 1 on both sides of the magneto coil 4a.
It is arranged so as to face 4a and 14b. A string 9 is laid across both ends of the protective tubes of the output cord deriving parts 8a to 8c, and both ends of the protective tubes of the output cord deriving parts 8a to 8c are collectively bundled by the string 9 in the axial direction of the stator core. It is tied to the power generation coil 4a while being pulled.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stator for a generator used as a stator of a magneto generator attached to an internal combustion engine.

[0002]

[Prior art]

 As a magneto generator attached to an internal combustion engine, a flywheel magnet rotor attached to the rotary shaft of the engine and driven by the engine, and arranged inside the magnet rotor and fixed to the crankcase of the engine or the like. Some are composed of a stator. As a stator of this type of magnet generator, a stator core in which a large number of salient poles are radially projected from an annular yoke part, a generator coil wound around the salient poles of the stator core, and the generator The one provided with an output cord respectively connected to a plurality of lead wires drawn from the coil is often used.

In this stator, a plurality of output cord deriving portions are configured by covering the connecting portions between the plurality of lead wires and the output cords with an insulating protective tube, and the plurality of output cord deriving portions are One of the axial ends of the stator core is arranged side by side on the outer peripheral surface of a specific power generation cord, and is bound to the specific power generation coil by a binding means such as a string.

In a conventional stator for a generator of this type, as shown in FIG. 6, the protective tubes 7a to 7c of the plurality of output code lead-out portions 8a to 8c are arranged in the radial direction of the stator core 1. A plurality of output cord deriving parts arranged in parallel with each other, with the protection tubes being oriented in a direction substantially orthogonal to each other and with the substantially central part of the protection tubes being in contact with the outer peripheral surface of the characteristic generating coil 4a. 8a to 8c were tightly bound to the generator coil 4a by a string 9 (fastening means).

[0005]

In the above output cord deriving section, the end of the lead wire of the generator coil and the end of the output cord are connected by a crimp terminal or soldering. The position of the connection between the end and the output cord is not necessarily constant in the protective tube, and the position of the connection is often different for each output code lead-out part.

In the conventional stator for a generator, a string 9 for tightly binding the output cord derivation parts 8a to 8c to the power generation coil 4a is provided with protection tubes 7a to 7c and a power generation coil 4a as shown in FIG. Since the protection tubes 7a to 7c are tied up by being tied up with each other, there are a portion bound and crushed by a string and a portion not bound by the string. If there is a connecting portion between the lead wire and the output cord inside the portion of the protective tube that is crushed by the cord, the connecting portion is held in a stationary state. However, if there is a connecting part between the lead wire and the output cord inside the part of the protective tube that is not restrained by the cord, it should be possible to move the connecting part inside the gap created inside the protective tube. Therefore, the vibration of the engine may vibrate the connecting portion between the lead wire and the output cord in the gap, and the lead wire and the core wire of the output cord may be repeatedly subjected to bending stress in the vicinity of the connecting portion to break the wire. .

An object of the present invention is to prevent all the connecting portions of the lead wire from the generator coil and the output cord from vibrating inside the protective tube, and to prevent the lead wire and the output cord from being connected near each connecting portion. An object of the present invention is to provide a highly reliable stator for a generator that eliminates the risk of core wire breakage.

[0008]

[Means for Solving the Problems]

 According to the present invention, a stator core in which a large number of salient poles are radially projected from an annular yoke, a generator coil wound around the salient poles of the stator core, and a generator coil An output cord connected to each of the plurality of lead wires, and a connecting portion between the plurality of lead wires and the output cord is covered with an insulating protective tube to form a plurality of output cord lead-out portions. The output cord deriving part of the generator is installed in parallel on the outer peripheral surface of a specific generator coil at one axial end face of the stator core, and is attached to the stator for the generator that is bound to the specific generator coil by the binding means. It is related.

In the present invention, the plurality of output cord lead-out portions are arranged such that the respective protective tubes are directed in a direction substantially orthogonal to the radial direction of the stator core, and both ends of the respective protective tubes are set to a specific generator coil. And the generator coils on both sides of the generator coil so as to face the gap formed between them. Further, the binding means for binding the output code lead-out portion to a specific generator coil has a portion that crosses both ends of the protection tubes of the plurality of output code lead-out portions arranged in parallel, and protects the plurality of output code lead-out portions. Both ends of the tube should be bundled together and tightly bound to the other end of the stator core in the axial direction.

[0010]

[Action]

 With the above-mentioned configuration, the plurality of output cord lead-out portions are arranged such that both ends of each protective tube are collectively pulled by the binding means to the other axial end face side of the stator core, and the specific generating coil is provided. Is bound on the outer peripheral surface of. In this case, the portion of each protective tube located between both ends of the binding means is curved along the outer peripheral surface of the specific generating coil, and is also radially crushed. Inside the portion of each protective tube that is curved and crushed along the outer peripheral surface of the generator coil (called the curved portion), the connection between the lead wire from the generator coil and the output cord is pressed by the protective tube. Is held in a stationary state.

In this case, since the curved portion of the protective tube exists over the entire outer peripheral surface of the specific power generation coil, even if the position of the connecting portion between the lead wire from the power generation coil and the output cord is somewhat uneven, The connection can be located within the bend of the protective tube. Therefore, it is possible to eliminate the possibility that the connecting portion between each lead wire from the generator coil and the output cord vibrates in the protective tube and is disconnected, and the reliability can be improved.

[0012]

【Example】

 1 to 5 show the structure of an embodiment of the present invention. 1 and 2 are a front view and a side view, respectively, of a stator for a generator. In these drawings, reference numeral 1 denotes an annular yoke portion 2 to a large number (18 in this embodiment) of salient pole portions 3a, 3b, ... A stator core formed by radially projecting 3r. The stator core 1 is formed by stacking a large number of core pieces formed by punching steel plates into a predetermined shape.

4r are generator coils wound around salient pole portions 3a, 3b, ... 3r of the stator core, respectively. In this example, 18 generator coils 4a, 4b, ... 4r are provided, and one set of generator coils provided at intervals of three in the circumferential direction of the stator core are electrically connected in series, for a total of 3 generator coils. A three-phase winding is composed of a set of magneto coils. One end of each of the three coil groups forming the three phases is commonly connected to serve as a neutral point of the three-phase winding, and the other ends are led out as lead lines 5a, 5b and 5c, respectively.

6a, 6b and 6c are output cords, one end of each of these output cords is connected to the end of the lead wire 5a, 5b and 5c of the power generating coil, and the connection between each lead wire and the output cord. The parts are covered with insulating protective tubes 7a, 7b and 7c to form three output cord lead-out parts 8a, 8b and 8c.

The output cord deriving portions 8a, 8b and 8c are arranged in parallel on the outer peripheral surface of a specific magneto coil 4a at one axial end surface side (upper side in FIG. 2) of the stator core 1 and are tightly bound. It is tied to the generator coil 4a by a string 9 as a means. The output cords 6a, 6b and 6c are collectively covered with an insulating tube 10 to form a wire harness, and the wire harness is clamped by a clamp metal fitting 11 attached to the stator core 1. The other ends (not shown) of the output cords 6a, 6b and 6c are three-phase output terminals of the stator. As the specific power generation coil to which the output cord derivation parts 8a, 8b and 8c are bound, the power generation coil in the most suitable position in relation to the mounting position of the clamp fitting 11 is selected.

The stator of the above embodiment is combined with an unillustrated multi-pole (12 poles in this example) magnet rotor that rotates outside the stator to form a three-phase magnet generator.

The three output code derivation units 8a, 8b and 8c have substantially the same structure. FIG. 4 shows a cross section of the one output cord deriving portion 8b in a state before being bound by the string 9. In the figure, the ends of the lead wire 5b of the generator coil and one end of the output cord 6b are connected by crimping terminals 12 after removing the respective insulating coatings to form a connecting part 13b. The output cord lead-out portion 8b is formed by being covered with an insulating protective tube 7b.

FIG. 3 shows a state in which the three output cord deriving units 8a, 8b and 8c are bound to a specific magneto coil 4a by a string 9 as a binding means. Further, FIG. 5 shows a cross section (cross section taken along line AA in FIG. 1) of the stator cut along a plane parallel to the axis of the stator core 1 including the center line of the protection tube 7b in FIG. The output code lead-out parts 8a, 8b and 8c are arranged in a state where the respective protection tubes 7a, 7b and 7c are oriented in a direction substantially orthogonal to the radial direction of the stator core 1 and both ends of the respective protection tubes 7a to 7c. It is arranged so as to face the gaps 14a and 14b formed between the specific magneto coil 4a and the magneto coils 4b and 4r on both sides thereof, respectively. The string 9 is hung across the protection tubes 7a to 7c of the output cord derivation units 8a to 8c placed in parallel in a state of traversing the protection tubes 7a to 7c, respectively, and further along the outer circumference of the power generation coil 4a. It is twisted and tied at both ends. Thereby, the protection tubes 7a to 7c are tightly bound to the generator coil 4a in a state where both ends thereof are collectively pulled by the string 9 toward the other end face side in the axial direction of the stator core 1.

In this state, the portion of each of the protection tubes 7a to 7c located between both ends of the protection tube 7a to 7c, which is pulled by the cord 9, is curved along the outer peripheral surface of the power generating coil 4a as shown in FIG. In addition, since the curved portion of each protective tube is deformed to be crushed in the axial direction of the stator core 1, the connecting portion between the lead wire of the generator coil and the output cord is inside the curved portion of each protective tube. Are held in pressure contact with the inner surface of the protective tube. Therefore, there is no possibility that each connecting portion will vibrate in the protective tube and a large repetitive bending stress will be applied to the lead wire and the output cord, and the possibility that each connecting portion will be disconnected can be eliminated.

In the above embodiment, the magneto coils wound around the salient poles of the stator core are connected in three phases, and three output cord lead-out portions are formed on the output side of each phase. When the generator coil is single-phase connected and has multiple output cord derivation parts, or in addition to the output code derivation part for three-phase or single-phase connection, it is wound around part of the salient poles of the stator core. It goes without saying that the present invention can be applied to the case where the output code deriving section of the exciter coil for the ignition power source of the internal combustion engine is provided.

In the above embodiment, a string is used as the binding means for binding the output cord deriving portion to the power generation coil, but as the binding means, for example, a thread or tape made of fiber or synthetic resin may be used. it can.

[0022]

[Effect of device]

 As described above, according to the present invention, both ends of the protective tubes of the plurality of output cord lead-out portions are collectively bound to the generator coil while being pulled toward the other axial end surface side of the stator core. Since the binding means is provided, it is possible to prevent the connecting portion between the lead wire of the generator coil and the output cord from being pressed against the inner surface of the protective tube to prevent the connecting portion from vibrating. This has the advantage of eliminating the possibility of disconnection near the connection between the lead wire and the output cord.

[Brief description of drawings]

FIG. 1 is a front view showing the structure of an embodiment of the present invention.

FIG. 2 is a side view showing the structure of the embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of the embodiment of FIG.

FIG. 4 is a cross-sectional view showing an output cord lead-out portion in a state in which a connecting portion between a lead wire of a magneto coil and an output cord is inserted into a protective tube.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a perspective view of a main part of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Yoke part 3a-3r Salient pole part 4a-4r Generator coil 5a-5c Leader wire 6a-6c Output cord 7a-7c Protective tube 8a-8c Output cord derivation part 9 Binding string (binding means) 13a, 13b connection part

Claims (1)

[Scope of utility model registration request] 1. A stator core in which a large number of salient pole portions are radially projected from an annular yoke portion, a generator coil wound around the salient pole portion of the stator core, and a plurality of coils drawn from the generator coil. Output cords respectively connected to the lead wires of the output cords, the connecting portions of the plurality of lead wires and the output cords are covered with an insulating protective tube to form a plurality of output cord lead portions, and the plurality of output cords are provided. In the stator for the generator, the cord lead-out portion is arranged side by side on the outer peripheral surface of the specific generating coil on one axial end face side of the stator core and is bound to the specific generating coil by the binding means. The plurality of output cord derivation parts are in a state in which the respective protection tubes are oriented in a direction substantially orthogonal to the radial direction of the stator core, and both ends of each protection tube are the specific power generation coil and the power generation coils on both sides thereof. The binding means has portions that cross both ends of the protective tubes of the plurality of output cord lead-out portions that are arranged in parallel, and the binding means has a plurality of output cord lead-out portions. A stator for a generator, characterized in that both ends of a protective tube are bundled together and tightly bound to the other axial end face side of the stator core.