JP2968187B2 - Lead wire fixing device for rotating machine stator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rotating machine, and more particularly to a lead wire fixing device suitable for fixing a lead wire connected to a magnet wire of a stator coil of a small rotating machine. It is.

[0002]

2. Description of the Related Art In an electric small rotating machine having an output of 0.75 kW or less, a lead wire connecting a terminal portion of a stator coil and an external power source is determined by a relative positional relationship with the stator. Therefore, the lead wire is fixed to the coil end portion of the stator coil by using a binding thread so as not to cause disconnection at the connection portion.

[0003]

In the prior art having the above construction, a load is easily applied to the enamel wire constituting the coil end of the stator coil, so that the thin enamel insulating coating of the magnet wire is damaged and the coil is damaged. In addition, there is a risk of causing a layer short, and it is difficult to automate the work of binding the lead wire to the coil end, and the quality is unstable. The present invention has been made in view of the above problems, and has as its object to provide a lead wire fixing device for a rotating machine stator suitable for stabilizing quality and improving reliability.

[0004]

In order to achieve the above object, the present invention relates to a lead wire fixing device for fixing a lead wire connected to a magnet wire of a stator coil to a stator. An electrically insulating lead wire fixing member formed in a C-shaped arc along the outer shape of the coil end of the stator protruding from the end face of the stator core, wherein the lead wire fixing member has the C-shaped outer shape. A plurality of wide grooves and a plurality of narrow grooves alternately formed along the U-shaped storage groove, and a partition in the wide groove, and the lead wire terminal portion connected to the magnet wire has the narrow width. A plurality of lead wires which are locked in a groove, are inserted separately into the wide groove via the partition, and then bind the lead wires at one place. It is a fixing device.

[0005]

According to the above construction, when the lead wire is bound to the coil end by using a thread, the same effect can be obtained, and the local stress on the magnet wire is prevented, thereby preventing the enamel coating film from being damaged. The layer short of the coil can be prevented, and the lead wire fixing member is
Since it is provided in a fixed position in a fixed form, connection and mounting can be easily automated.

[0006]

An embodiment will be described below with reference to the drawings. FIG. 1 is a front view of a stator to which a stator lead wire fixing device of the present invention is mounted, and FIG. 2 is a view showing a partial cross section of the same side.
In FIG. 1, 1 is a stator, 2 is a stator core, 5 is a plurality of slots provided along the inner diameter of the stator core 2, 4.
Are the main coil 4a and the auxiliary coil 4 wound around the slot 5.
b, and a coil end 4 ′ protruding from both end faces of the stator core 2.
A slot insulator 6 is inserted into the slot 5 prior to winding the stator coil 4, thereby electrically insulating the magnet wire 7 of the stator coil 4 from the stator core 2. I have.

Reference numeral 8 denotes a lead wire fixing member. The portion of the slot insulator 6 protruding from the stator core 2 forms a cuff portion 6 '. The lead wire fixing member 8 has a cuff portion 6'. C-shaped insulating material along the circular outer edge of
It is formed using a BT resin or the like. FIG. 3 is a front view of the lead wire fixing member 8, and FIG. As shown in FIG. 3, both open ends of the lead wire fixing member 8 have locking portions 10 that engage with the cuff portions 6 ′.
A storage groove 9 having a U-shaped cross section is formed along the outer shape of the letter, and the storage groove 9 is partitioned into a plurality of places by partition walls 11 so that the connection portions of a plurality of lead wires 12 can be stored.
Further, the U-shaped section of the storage groove 9 includes a plurality of wide grooves 9a,
A plurality of narrow grooves 9b are provided. The bottom surface of the fixing member 8 is in contact with the end surface of the stator core 2.

The lead wire 12 is formed by covering and insulating a core wire with a material such as cross-linked polyethylene or vinyl chloride, and a conductor 13 serving as a core wire is connected to a connecting portion 15 forming one end of a terminal 14 as shown in FIG. Electrically coupled to FIG.
FIG. 4 is a view showing a state where the lead wire 4 and the lead wire 12 are connected and connected, wherein the connection portion 15 is bent and pressed. As shown in the figure, the width d of the serrated retaining portion 16 provided at the intermediate portion of the terminal 14 is preferably set to be slightly larger than the width s of the wide groove 9a. After the connection portion 17 is electrically connected, the connection portion 17 is mounted together with the lead wire 12 in the storage groove 9, so that the terminal 14 is connected.
The lead wire 12 does not move in the longitudinal direction, and the connecting portion 17 is fixed in the storage groove 9 so as not to move in the direction perpendicular to the longitudinal direction of the lead wire 12. In this manner, the lead wire 12 is wound from both the left and right directions along the outer circumference of the coil end 4 ′, and the entirety of the lead wire 12 is put together at a position where the left and right lead wires 12 meet to form the binding member 18. Use to tie.

The lead wire 12 is stably supported by the binding member 18 even when both tensile and compressive loads are applied to the lead portion 19 on the power supply side, and the lead wire 12 is connected to the magnet wire 7 and the terminal 14. The connecting portion 17 can have a stable configuration that is not affected by an external load (arrow F in FIG. 1). FIG. 7 is an electrical connection diagram of the present embodiment, in which reference numeral 3 denotes a power supply, and reference numeral 20 denotes a capacitor, which energizes the stator coil 4 respectively.

[0010]

According to the present invention, a tightening force is uniformly applied to the lead wire fixing member and the lead wire on the outer periphery of the coil end, and the pull-out portion of the lead wire maintains the tensile strength and the compressive strength. Since no local load is applied, it is possible to prevent the stator coil from being short-circuited due to damage to the magnet wire. In addition, the manufacturing process can be automated by inserting the stator lead wire into the lead wire fixing member from the axial direction in a small rotating machine, and a stator of uniform quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a stator according to an embodiment to which a lead wire fixing device of the present invention is mounted. FIG.

FIG. 2 is a diagram showing a partial cross section of a side surface of the stator of FIG. 1 of the present invention.

FIG. 3 is a front view of an embodiment of a lead wire fixing member of the present invention.

FIG. 4 is a side view showing a partial cross section of the lead wire fixing member of FIG. 3 of the present invention.

FIG. 5 is a development view of an embodiment of the terminal fitting of the present invention.

6 is a diagram showing a state where the terminal fitting of FIG. 5 of the present invention is connected to a lead wire.

FIG. 7 is an electrical connection diagram of one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stator 2 ... Stator core 3 ... Power supply 4 ... Stator coil 4 '... Coil end 4a ... Main coil 4b ... Auxiliary coil 5 ... Slot 6 ... Slot insulator 6' ... Cuff part 7 ... Magnet wire 8 ... Lead Wire fixing member 9 ... storage groove 9a ... wide groove 10 ... locking part 9b ... narrow groove 11 ... partition wall 12 ... lead wire 13 ... lead wire 14 ... terminal 15 ... coupling part 16 ... retaining part 17 ... connection part 18 ... binding Member 19: drawer 20: condenser

Claims (1)

(57) [Claims] 1. A lead wire fixing member formed in a C-shaped arc along the outer shape of a stator coil of a rotating machine and having a lead wire fixing member for fixing a plurality of electrically insulating leads to the stator. An apparatus, wherein the lead wire fixing member has a wide groove forming a U cross section, a narrow groove formed at a plurality of positions in the wide groove, and an intermediate position between the narrow groove and the narrow groove. and a partition wall formed in the wide groove, with each of said lead wires to isolate from each other in the wide groove by the partition wall, the terminal portion of the lead wire connected with the magnet wire of the stator coil, wherein A lead wire fixing device for a rotating machine stator, comprising: a structure in which the lead wire is bundled in one place so as to be housed in the wide groove so as to be locked by a boundary between the wide groove and the narrow groove. .