JPH0733582Y2 - Step Motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of a step motor that facilitates external wiring while maintaining a sealed state.

(Prior Art) Conventionally, a step motor, that is, as shown in FIGS. 7 and 8, is mounted on both end surfaces of a stator frame 3 in which a stator core 2 around which a stator winding 1 is wound is press-fitted. , End caps 4 and 5 for sealing both end surfaces of the stator frame 3 are mounted, and the rotary shaft 7 of the rotor core 6 paired with the stator core 2 is supported on both end caps 4 and 5 through bearings 8. The rotary shaft 7 of the rotor core 6 is projected from the end cap 4 so that power can be taken out, and the lead wire 9 for connecting the stator winding 1 to an external circuit is grommet from the other end cap 5.
In the case of the conventional step motor 11 drawn out to the outside through 10, there were the following problems.

(Problems to be solved by the invention) That is, for example, the connection between each color-coded lead wire 9 connected to a predetermined terminal of the control unit for the step motor 11 not shown and each corresponding terminal of the stator winding 1 is Since it is necessary to appropriately mark each terminal of the stator winding 1 and the like, the work is complicated, wiring mistakes are likely to occur, and the productivity of the step motor 11 is significantly reduced. In addition,
There is a drawback that water, dust and the like enter from between the lead wire 9 and the grommet 10 to remarkably shorten the life of the step motor 11.

As a countermeasure against this, actual development No. 61-32762 and actual development No. 61-355
As described in Japanese Patent No. 55, there is a method of attaching a connector to the step motor body before attaching the case or the cover, but even in this case, each terminal connected to the predetermined terminal of the step motor control device Alternatively, no solution is provided for the method of connecting the lead wire and each corresponding terminal of the stator winding.In addition, water, dust, etc. may enter from the case or between the cover and the connector to extend the life of the step motor. There was a drawback that it significantly lowered.

(Means for Solving the Problem) The present invention is a ring-shaped synthetic resin integrally formed with an insulator for each magnetic pole winding inside from both end surfaces of a cylindrical stator core having a plurality of magnetic poles formed on the inner circumference. A bobbin made of steel is attached, and on both end faces of a stator core, in which a stator winding is wound around each magnetic pole from above the bobbin, a ring-shaped protection plate for protecting the stator winding formed of an insulating material is attached, and End caps for sealing both ends of the stator frame are attached to both end faces of the stator frame to which the stator core is attached, and the rotary shafts of the rotor core paired with the stator core are supported on both end caps through bearings, A rotary shaft of the rotor core is projected from at least one of both end caps so that power can be taken out, and a synthetic resin socket for a connector for connecting the stator winding to an external circuit is provided on the other end cap. Outsert is integrally molded together with the other of both end caps, and connector terminals are insert-molded in the socket so as to be connectable to the stator winding, and further, for each terminal facing each connector terminal of the bobbin. A first holding groove for positioning and fixing the lead wire for power supply from the stator winding is formed at a wiring position, and the first holding groove is formed at each terminal-specific wiring position facing each connector terminal of the protection plate. A second holding groove for sandwiching and fixing the power supply lead-out wire from the stator winding, and connecting the power supply lead-out wire to each of the connector terminals facing each other; This is in a step motor in which the ends of the lead wires, which are positioned and fixed by the holding groove, and the connector terminals are soldered.

(Operation) In the case of the step motor configured as described above, in the winding completed state of the stator winding, each terminal wire of the stator winding connected to each corresponding terminal of the connector is connected to each corresponding terminal of the bobbin. Each terminal wire of the stator winding, which is connected to each corresponding terminal of the connector when the ring-shaped protective plate is attached to the end face of the stator core, is inserted into the first holding groove, Further, as a result of being sandwiched between the respective first holding grooves and the corresponding second holding grooves of the ring-shaped protection plate, the respective terminal wires of the stator winding are definitely connected to the respective terminals of the corresponding connector. Moreover, at this time, the lead wire is soldered to the connector terminal while being positioned and fixed in the second holding groove, so that the lead wire is securely connected. Also, because the connector socket with insert-molded connector terminals is integrally molded with the end cap by outsert, waterproof,
A sufficient dustproof function can be ensured.

(Embodiment) Next, the construction of the first embodiment of the present invention will be described with reference to FIGS.

End caps 15 and 16 for sealing both end faces of the stator frame 14 are attached to both end faces of the stator frame 14 in which the stator core 13 having the stator windings 12 wound therein is press-fitted through through bolts (not shown). Between the end caps 15 and 16, a stator core 13 and a pair of rotor cores 17 bearing a rotary shaft 18 thereof.
It is rotatably attached while being supported via.

Then, the rotary shaft 18 of the rotor core 17 projects from the one end cap 15 so that power can be taken out, and the stator winding 12 is connected to an external circuit on the other end cap 16 made of light metal casting, for example, aluminum die casting. Socket 21 made of synthetic resin for connector 20 is integrally molded by outsert, and conductive terminal 22 for connector 20 is stator winding
It is possible to connect with 12, in this case, a ring-shaped synthetic resin bobbin 23 in which the winding insulator for each magnetic pole is integrally formed from both end surfaces of a cylindrical stator core 13 having a plurality of magnetic poles formed on the inner circumference. And a ring-shaped protective plate 24 for protecting the stator winding 12 formed of an insulating material on both end faces of a stator core 13 in which the stator winding 12 is wound around each bobbin 23 from above the bobbin 23.
The first holding groove for sandwiching and fixing the lead wire 25 for power supply from the stator winding 12 at the wiring position for each terminal 22 facing each terminal 22 for the connector 20 of the bobbin 23. 26 is formed, the stator winding 12 is provided at the wiring position of each terminal 22 facing each terminal 22 of the connector 20 of the protection plate 24.
The lead wire 25 for power supply from the connector is sandwiched for positioning and fixed, and the second holding groove 27 for connecting the lead wire 25 for power supply with each terminal 22 of the connector 20 facing each other is formed, and the socket A connection port 29 is formed at a position above the conductive terminal 22 of 21. The lead wire 25 from the second holding groove 27 is soldered to the conductive terminal 22 and then the blind cover 28 covers the connection port 29.

Next, the operation of this embodiment will be described.

In the case of the step motor 30 configured as above, in the winding completed state of the stator winding 12, each terminal wire 25 of the stator winding 12 connected to each corresponding terminal 22 of the connector 20 is connected to the bobbin 23. Of the corresponding stator holding coil 26, and in the state where the ring-shaped protection plate 24 is attached to the end face of the stator core 13, the stator winding connected to the corresponding terminal 22 of the connector 20. Each terminal wire 25 of 12 is further provided with a ring-shaped protection plate from each corresponding first holding groove 26 of the bobbin 23.
As a result of being sandwiched in each of the corresponding second holding grooves 27 of 24, each terminal wire 25 of the stator winding 12 is definitely the corresponding connector 20.
Connected to each terminal 22 of the
The insert-molded socket 21 is integrally molded with the other end cap 16 of light metal casting such as aluminum die casting by outsert, and the connection port 29 formed in the other end cap 16 is a blind lid after soldering work. Since the lid is covered with 28, the step motor 30 can be easily externally wired while the waterproof and dustproof functions are sufficiently ensured.

Next, FIG. 5 and FIG. 6 are reference examples, in which the connector 31 is formed by inserting the socket 32 into a knife-edge-shaped conductive terminal 33 and the stator core 34 into a ring-shaped end surface. The protective plate 35 made of an insulating material is formed in a removable shape with the V-shaped conductive receiving terminal 36 fitted in each terminal connection position groove (not shown), and has a knife edge shape when the other end cap 38 is fitted in the stator frame 37. The conductive terminal 33 at the tip is inserted into the V-shaped conductive receiving terminal 36 so that both terminals 33, 36 become conductive, and the lead wire 40 of the stator winding 39 is attached to the V-shaped conductive receiving terminal 36. By inserting the knife-edge conductive terminal 33 into the V-shaped conductive receiving terminal 36 so that the lead wire 40 of the stator winding 39 is covered by the V-shaped conductive receiving terminal 36. It is possible to make solderless connection as it is, peel off the coating and make solderless contact It can be continued,
It is also possible to peel off the coating for solder connection.

In these cases, it is possible to further ensure the waterproof and dustproof functions of the step motor 41 and further facilitate external consideration.

(Effects of the Invention) The present invention is equipped with a ring-shaped synthetic resin bobbin integrally formed with an insulator for each magnetic pole winding inside from both end surfaces of a cylindrical stator core having a plurality of magnetic poles formed on the inner circumference. Then, a ring-shaped protective plate for protecting the stator winding, which is formed of an insulating material, is attached to both end surfaces of a stator core in which the stator winding is wound around each magnetic pole from above the bobbin. In addition, the lead wire for power supply from the stator winding is inserted and positioned at the wiring position for each terminal facing each terminal for the connector of the socket integrally molded with outsert on the sealing end cap on the end face of the stator frame. The purpose is to form a first holding groove and a second holding groove for fixing.

Accordingly, in the present invention, in the winding completion state of the stator winding, each terminal wire of the stator winding connected to each corresponding terminal of the connector is further connected to the ring from each corresponding first holding groove of the bobbin. As a result of being sandwiched in the respective corresponding second holding grooves of the plate-like protective plate, the respective terminal wires of the stator winding are definitely connected to the respective terminals of the corresponding connector. Moreover, since the lead wire is soldered to the connector terminal in a state where the lead wire is positioned and fixed in the second holding groove, the lead wire is surely connected. Further, since the socket of the connector in which the connector terminal is insert-molded is integrally formed with the end cap by outsert, there is an effect that the waterproof and dustproof functions can be sufficiently ensured.

[Brief description of drawings]

FIG. 1 is a rear view of a step motor 30 according to the first embodiment of the present invention, FIG. 2 is a side view of a main portion of the step motor 30, and FIG. 3 is a rear view showing a state in which a blind lid 28 of the step motor 30 is removed. Fig. 4 shows a ring-shaped insulating protective plate for the step motor 30.
24 Stator frame 14 showing the state before mounting
FIG. 7 is a rear view of the stator frame 14 showing a state after the ring-shaped insulating protective plate 24 is attached, FIG. 6 is a side view of a step motor 41 of the second embodiment of the present invention, and FIG. The rear view of the stator frame 37 showing the mounting state of the ring-shaped insulating protective plate 35 of the step motor 41, and FIG.
The figure is a rear view of the stator frame 3 of the step motor 11. 12, 39… Stator winding 13, 34… Stator core 14, 37… Stator frame 15, 16, 38… End cap 17… Rotor core, 18… Rotating shaft 19… Bearing, 20, 31… Connector 21 , 32 ... Socket, 22, 33 ... Conductive terminal 23 ... Bobbin, 24, 35 ... Protective plate 25 ... Lead wire, 26 ... First holding groove 27 ... Second holding groove

Claims (1)

[Scope of utility model registration request] 1. A bobbin made of a ring-shaped synthetic resin in which an insulator for each magnetic pole winding is integrally formed is mounted inside from both end surfaces of a cylindrical stator core having a plurality of magnetic poles formed on the inner circumference. A stator with the stator windings wound around each magnetic pole from above, with a ring-shaped protective plate for protecting the stator windings, which is made of an insulating material, attached to both end faces of the stator core, and the stator with the stator cores attached. End caps for sealing the both ends of the stator frame are attached to both end faces of the frame, and the rotary shafts of the rotor cores paired with the stator cores are supported on both end caps through bearings, and are rotated from at least one of the both end caps. The rotary shaft of the child core is projected so that power can be taken out, and a synthetic resin socket for a connector for connecting the stator winding to an external circuit is attached to the other end cap on the other side of both end caps. It is integrally molded by outsert, the connector terminal is insert-molded in the socket so that it can be connected to the stator winding, and the fixing is made at each terminal-specific wiring position facing each connector terminal of the bobbin. A first holding groove for sandwiching and sandwiching a power supply lead wire from the child winding is formed, and the stator winding is provided at each terminal-specific wiring position facing each terminal for the connector of the protection plate. The power supply lead-out wire is sandwiched between the power supply lead-out wire and the power supply lead-out wire, and a second holding groove is formed for connecting the power supply lead-out wire to each of the connector terminals facing each other. A step motor, wherein the end portion of the lead wire and each connector terminal are soldered.