JPH089577A - Cable terminal processor for motor - Google Patents

Abstract

PURPOSE:To improve the work efficiency in terminal processing for electrically connecting a lead wire with a winding, and also, prevent the electric connection from being marred even if tensile strength works on the lead wire. CONSTITUTION:A terminal processing part 31 is molded integrally at one part of the slot insulator wound on stator core, and a plurality of connector terminals 32, where the terminals 15a of the winding wound on the said core and the terminal of the lead wire 38 connected electrically to this are connected severally, are attached severally to this processing part 31. Each connection terminal 32 is equipped with a tubular lead wire connection 35, where the core wire 38a of the terminal of the lead wire 38 is press-fit, a calking end 36, which is pressure-welded to the insulator cover of the terminal of the lead wire 38, being provided integrally and bent at one end of the this connection 35, and a winding connection end 37, which is extended integrally at the other end and to which the terminal 15a of the winding is soldered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to, for example, a hybrid type stepping motor and the like, and relates to an electric wire terminal treatment device for a motor for electrically connecting an end portion of a winding of a stator and an end portion of a lead wire. .

[0002]

2. Description of the Related Art FIG. 7 is an exploded perspective view showing the state of terminal treatment of electric wires in a conventional hybrid type stepping motor. Reference numeral 1 is a stator core 2, a slot insulation 3 made of synthetic resin, and a winding 4 wound by a bifilar. A stator 5 formed by attaching and is a ring-shaped printed wiring board for terminal treatment, and terminal portions of lead wires 7 are soldered to the soldering patterns 6 provided on the surface thereof.

The slot insulation 3 has a plurality of outer peripheral projections 3a protruding in the axial direction of the stator core 2 and an inner peripheral projection 3b bent in the axial direction of the stator core 2 from the tips of the salient poles 2a of the stator core 2. And have. The printed wiring board 5 has an outer peripheral protrusion 3 at one end of the stator 1.
It is provided on the winding wire 4 so as to be sandwiched between a and the inner peripheral side convex portion 3b, and the terminal portion 4a of the winding wire 4 is soldered to the soldering pattern 6 thereof.

In order to electrically connect each end of the winding wire 4 and the lead wire 7 in the conventional example shown in FIG. 7, first, the end portion 4a of the winding wire 4 wound around the stator core 2 is replaced by the one shown in FIG. As shown in FIG. 3, the slot insulation 3 is pulled out from between the outer peripheral projections 3a to the outside of the stator 1, and is manually held at the respective pulling positions on the outer surface of the stator core 2 via an adhesive tape (not shown).

Next, the printed wiring board 5 to which the lead wires 7 have been soldered to the soldering patterns 6 in advance is formed on the outer peripheral side convex portion 3a and the inner peripheral side at the one end of the stator 1 from which the terminal portion 4a is drawn out. It is manually inserted and fixed to the convex portion 3b. Although not shown, this fixing is performed by fixing a fixing pin integrally provided on the slot insulation 3 to the printed wiring board 5.
After being inserted through a fixing hole (not shown) provided in the above, the fixing pins are heated and melted by so-called heat staking.

In this way, the printed wiring board 5 is attached to the stator 1
Then, the terminal portion 4a of the drawn winding 4 is manually guided to the soldering pattern 6 at a predetermined position and soldered while manually positioning it there. Through the above work, the winding wire 4 and the lead wire 7 are electrically connected via the printed wiring board 5.

[0007]

Conventionally, in addition to soldering the terminal portions 4a of each winding 4 to the printed wiring board 5, the terminal portions of a plurality of lead wires 7 are connected to the printed wiring board 5 before that. Since it is necessary to solder each of them, the total number of soldering steps is large. Moreover, the terminal portions 4a of the windings 4 are dispersedly arranged corresponding to the winding positions and are temporarily held on the outer surface of the stator 1, and
In order to solder these terminal portions 4a to the soldering patterns 6 scattered over the entire ring-shaped printed wiring board 5, the working direction must be changed each time soldering is performed. Therefore, for these reasons, there is a problem that the workability of the terminal processing work is conventionally poor.

In addition, since no measure for stopping the tension has been taken for the lead wire 7 in the related art, the lead wire 7 is not handled when it is handled in assembling a stepping motor.
There is also a problem that the pulling force acting on the lead wire 7 is directly applied to the soldered portion with the printed wiring board 5, and there is a high possibility that the lead wire 7 will come off due to the peeling of the solder.

An object of the present invention is to improve the workability of terminal treatment for electrically connecting a lead wire and a winding, and
An object of the present invention is to obtain an electric wire terminal treatment device for a motor in which the electrical connection is not damaged even if a pulling force acts on the lead wire.

[0010]

In order to achieve the above-mentioned object, the electric wire terminal treatment device for a motor of the present invention has a terminal treatment portion integrally formed with a part of a synthetic resin slot insulation attached to a stator core. A plurality of connection terminals to which a terminal portion of a winding wound around the stator core and a terminal portion of a lead wire electrically connected to the terminal portion are respectively connected to the processing unit, and each of the connection terminals is connected. A terminal is integrally provided at a cylindrical lead wire connecting portion into which a core wire in the terminal portion of the lead wire is press-fitted, and one end of the connecting portion on the outer side of the slot insulation, and is bent to end the lead wire. And a crimping end portion having a crimping piece press-contacted to the insulation coating in the portion, and the other end of the lead wire connecting portion on the inner side of the slot insulation, which is integrally extended from the lead wire connecting portion. In which the terminal portion of the winding is provided with a winding connection end portions to be soldered.

[0011]

In the configuration of the electric wire terminal processing device for the motor, the core wire of the lead wire inserted through the caulking end portion is press-fitted into the lead wire connecting portion of the connecting terminal, whereby the lead wire connecting portion and the lead wire are connected. The wires are electrically connected to each other, and the winding connecting ends of the lead wire connecting terminals are soldered to the terminal ends of the windings led thereto. Therefore, both ends of the lead wire and the winding are electrically connected via the connection terminal, and soldering is performed only on the winding in this connection. Moreover, in this soldering, since each connection terminal is attached to the terminal processing unit and gathered in one place, the winding terminal unit can be soldered in one place in a concentrated manner.

The caulking end of the connecting terminal is bent by crimping the caulking piece and press-contacting the insulation coating on the end of the lead wire passed through the caulking end to mechanically clamp the end of the lead wire. To do. Therefore, the pulling force acting on the lead wire is supported by the caulking end portion that sandwiches the end portion of the lead wire, and the lead wire is prevented from coming off from the connection terminal by the pulling force.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing a stator 12 included in a two-phase hybrid type stepping motor provided with an electric wire end treatment device 11 according to an embodiment of the present invention. The stator 12 is formed by mounting a synthetic resin slot insulation 14 on a stator core 13 formed by laminating a plurality of identical stator core plates, and mounting a winding 15 by bifilar winding.

The stator 12 has a tubular shape and has a plurality of, for example, eight salient poles 12a protruding toward the center as shown in FIG. The salient poles 12a are provided with pole teeth 12a1 extending in the axial direction of the stator 12 on the tip end surface in the projecting direction to form an uneven shape. In FIG. 2, 16 is a rotor whose outer peripheral portion is magnetized, 16a is a rotor shaft, and 17 is a caulking shaft that connects the stator core plates in a laminated state.

The slot insulations 14 are provided on both axial ends of the stator 12, respectively. Both slot insulation 14
As shown in FIG. 2 as a representative, a ring-shaped main portion 18, a plurality of crossover wiring pins 19 integrally projecting from the main portion 18, and a plurality of outer peripheries integrally protruding from the main portion 18. It is provided with a side convex portion 20 and a plurality of salient pole cover portions 21 protruding from the main portion 18 toward the center and having an inner peripheral side convex portion 21a provided at the tip thereof.

The main portion 18 has a plurality of concave portions provided therein, which are engaged with the semi-circular convex portions formed around the end portion of the caulking shaft 17 (see FIG. 2), whereby the stator 12 of the stator 12 is made. It is provided so as to be circumferentially stopped and positioned at the end in the thickness direction. The salient pole cover portion 21 is superposed on the end face 12a2 in the thickness direction of each salient pole 12a. The winding 15 is wound around the salient pole 12 a covered with the salient pole cover portion 21. Each of the pin 19 and each of the protrusions 20 and 21a protrudes along the thickness direction of the stator 12, and particularly the inner peripheral side protrusion 21a serves to prevent the winding 15 from coming off from the salient pole 12a.

An electric wire end treatment device 11 is provided in a part of one of the slot insulations 14 which performs end treatment of the electric wire. This processing device 1
1 is formed by including a terminal processing portion 31 formed integrally with a part of the one slot insulation 14 and a plurality of connecting terminals 32 made of conductive metal fittings attached thereto.

The terminal processing section 31 is arranged so as not to interfere with the winding work of the winding 15 over the pair of adjacent outer peripheral projections 20, as shown in FIGS. 2 and 5 and 6. It has a rectangular shape in plan view and has a plurality of, for example, six grooves 33 which are parallel to each other. Each groove 33 is
As shown in FIG. 3 and the like, both ends in the longitudinal direction and the upper surface are opened, and the longitudinal direction is the stator 12.
Approximately coincides with the radial direction.

Winding temporary fixing grooves 34 are provided at the corners formed by the horizontal bottom surface and the end surface perpendicular to the ends of the grooves 33, which are far from the center of the stator 12. Each temporary fixing groove 34 is formed so as to be cut, and the width becomes narrower as it becomes deeper, so that the winding 15 can be sandwiched on the groove bottom side and temporarily fixed.

Each connection terminal 32 is housed and fixed in each groove 33 by press fitting or the like while avoiding the temporary fixing groove 34. These metal fittings 32 have the same structure, and are provided with a lead wire connecting portion 35, a caulking end portion 36, and a winding connecting end portion 37 as shown in FIGS.

The lead wire connecting portion 35 is formed by denting the opposite side walls of a rectangular tubular pipe inward so as to approach each other. The side wall is used as the core wire contact wall 35a. The contact wall 35a has a caulking end portion 36 side which is tapered so as to widen a frontage for guiding and easily inserting a core wire of a lead wire described later.

The crimping end portion 36 is integrally provided at one end of the lead wire connecting portion 35, and is formed by bending the crimping pieces 36b at right angles on both sides of the bottom plate portion 36a along the bottom surface of the groove 35. The root side of the caulking piece 36b is continuous with the core wire contact wall 35a, but the tip side thereof is the core wire contact wall 35a.
It is provided so that it can be bent without being disturbed.

The winding connecting end 37 is connected to the lead wire connecting portion 35.
The bottom plate portion of the connecting portion 35 is integrally formed at the other end of the.

Each caulking end portion 36 of each connection terminal 32 having the above-described structure is exposed to the outside of the slot insulation 14, and the winding connection end portion 37 is exposed to the inside (center side) of the slot insulation 14. The electric wire end processing device 11 is formed together with the end processing part 31 by being press-fitted into the grooves 33.

The wire end processing device 11 is connected to the end portion 15a of the winding 15 and the end portion of the lead wire 38 with an insulation coating as follows. The core wire 38a exposed at the terminal portion of the lead wire 38 is provided with so-called preliminary solder by applying a solder layer to the outer surface of the core wire 38a in advance.

First, the wire end processing device 11 is formed by winding the winding 15 wound around the salient pole 12a of the stator core 13 covered with the slot insulation 14 through the necessary crossover wiring pin 19.
And the terminal portion 15a is passed through the connection terminal 32 and hooked in the winding temporary fixing groove 34 for temporary fixing. This temporarily fixed state is representatively shown at the position A in FIG.
The terminal portion 15a of No. 5 vertically cuts on the winding connecting end portion 37, penetrates the lead wire connecting portion 35, and further vertically cuts on the bottom plate portion 36a of the caulking end portion 36.

Thereafter, the core wire 38a of the lead wire 38 is press-fitted into the lead wire connecting portion 35 from the side of the caulking end portion 36. By this press-fitting work, the core wire 38a is strongly sandwiched between the core wire contact walls 35a of the lead wire connection portion 35 facing each other, and the lead wire 38 and the lead wire connection portion 35 are electrically connected.
The press-fitting operation is performed until the insulating coating of the lead wire 38 hits the end surface of the lead wire connecting portion 35 on the side of the caulking end portion 36 (see FIG. 4) and is stopped. This lead wire insertion state is representatively shown at the position B in FIG. 6, and in this state, the end portion of the lead wire 38 covered with the insulating coating is inserted into the caulking end portion 36. In the lead wire insertion described above, the terminal portion 15a of the winding 15 is located below the core wire 38a, is difficult to contact the core wire 38a, and is temporarily fixed as described above. Core wire 38
It is not extruded even when it comes into contact with a.

Next, the pair of caulking pieces 36b of the caulking end portion 36 are bent so as to come close to each other, and the caulking pieces 36b are caulked to be pressed against the insulating coating at the end portion of the lead wire 38. The caulking work is performed by caulking piece 36
This is performed by sandwiching the bottom surface of the terminal processing unit 31 with pliers or the like and applying pressure. This caulked state is representatively shown at the position C in FIG. 6, and in this state, the insulating coating at the end portion of the lead wire 38 is the bottom plate portion 3 of the caulked end portion 36.
6a and the caulking piece 36b are strongly sandwiched, and the caulking end 3
6 mechanically supported.

Finally, the terminal portion 15a of the winding 15 which has already been passed through the connecting terminal 32 is soldered to the winding connecting end portion 37 with solder 3.
The terminal portion 15a and the winding connection end portion 37 are mechanically and electrically connected to each other by soldering via the wiring 9. This connection state is representatively shown at the position D in FIG.

The connection terminal 32 is formed by each connection as described above.
The terminal portion 15a of the winding 15 and the terminal portion of the lead wire 38 are electrically connected via the. In the above connection, two of the total four terminal portions 15a of the two windings 15 of each phase wound by the bifilar winding are commonly connected as a common.

As described above, the winding 15 and the lead wire 3
Wire end processing device 1 for electrically connecting each terminal part with
1 is a core wire 3 of a lead wire 38 that is inserted into a lead wire connecting portion 35 of the connection terminal 32 through a caulking end portion 36.
Since 8a is press-fitted to electrically connect to the lead wire 38, soldering to the lead wire 38 is unnecessary. Therefore, in the electrical connection between the winding wire 15 and the lead wire 38, only the winding wire 15 needs to be soldered, and the number of soldering steps can be halved compared to the conventional case.

Further, since each connection terminal 32 to which the terminal portion 15a of the winding 15 is soldered is attached to the groove 33 of the terminal processing portion 31 and gathered in one place, the winding terminal portion 1
The soldering of 5a can be concentrated at one place. Moreover, since the connection terminals 32 have the same direction, the soldering work can be performed from the same direction.

In addition, in the present embodiment, the terminal portions 15a of the windings 15 are preliminarily locked and temporarily fixed in the winding temporary fixing grooves 34, so that each terminal portion 15a is manually operated. No hassle of soldering while positioning.

Therefore, for the above reasons, it is possible to improve the workability of the terminal treatment for electrically connecting both the terminal portions of the lead wire 38 and the winding wire 15.

As described above, each connection terminal 32 has the crimping end portion 36, and the crimping piece 36b is bent to form an insulating coating on the terminal portion of the lead wire 38 passed through the crimping end portion 36. The end portion of the lead wire 38 can be mechanically clamped by pressing. Therefore, the pulling force acting on the lead wire 38 can be supported by the caulking end portion 36 that sandwiches the end portion of the lead wire 38, whereby the lead wire 38 is prevented from coming off from the connection terminal 32 by the pulling force. It can be prevented. In other words, the reliability of the electrical connection between both ends of the lead wire 38 and the winding 15 is high, and the quality of terminal processing can be improved.

[0036]

As described in detail above, according to the electric wire terminal treatment device for a motor of the present invention, the electrical soldering of both ends of the lead wire and the winding is performed only on the winding. Well, it is not necessary for the lead wire, the number of soldering steps can be reduced, and the soldering of the winding terminal can be concentrated at one place. The workability of terminal processing for electrically connecting can be improved. Moreover, in order to support the pulling force acting on the lead wire by mechanically sandwiching the end portion of the lead wire with the crimped end portion of the connection terminal, the lead wire and the winding wire formed through the connection terminal The electrical connection is not compromised by pulling forces on the leads.

[Brief description of drawings]

FIG. 1 is a perspective view showing a stator included in a hybrid type stepping motor provided with an electric wire end treatment device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the stator shown in FIG. 1 in a state before winding is wound.

FIG. 3 is a perspective view showing a part of an electric wire end treatment device according to the same embodiment.

FIG. 4 is a perspective view showing a state in which both end portions of the lead wire and the winding are connected to the connection terminals of the electric wire end treatment device according to the same embodiment.

FIG. 5 is a plan view showing the entire electric wire terminal treatment device according to the same embodiment before use.

FIG. 6 is a plan view for explaining a procedure for connecting both end portions of the lead wire and the winding to the electric wire end treatment device according to the same embodiment.

FIG. 7 is an exploded perspective view showing a situation of terminal treatment of electric wires in a hybrid type stepping motor according to a conventional example.

[Explanation of symbols]

 11 ... Winding end treatment device, 13 ... Stator core, 14 ... Slot insulation, 15 ... Winding, 15a ... Winding end part, 31 ... End treatment part, 32 ... Connection terminal, 35 ... Lead wire connection part, 36 ... Caulking end portion, 36a ... Bottom portion of caulking end portion, 36b ... Caulking end portion of caulking piece, 37 ... Winding connecting end portion, 38 ... Lead wire, 38a ... Lead wire core wire.

Claims (1)

[Claims] 1. A terminal processing part is integrally molded with a part of a slot insulation made of a synthetic resin to be mounted on a stator core, and the processing part has a terminal part of a winding wound around the stator core and electrically connected thereto. A plurality of connecting terminals to which the terminal portions of the lead wires to be connected are respectively attached are attached, and each of the connecting terminals is a cylindrical lead wire connecting portion into which the core wire in the terminal portion of the lead wire is press-fitted. , Is integrally provided at one end on the outer side of the slot insulation in this connection portion,
A crimping end portion having a crimping piece that is bent and press-contacted to the insulating coating at the end portion of the lead wire, and integrally with the other end of the lead wire connecting portion on the inner side of the slot insulation from the lead wire connecting portion. An electric wire terminal treatment device for a motor, comprising: a winding connecting end to which the winding is extended and a terminal portion of the winding is soldered.