JPS61150629A - Coil unit for motor - Google Patents

Abstract

PURPOSE:To protect coils or lead wires external force, by covering a coil unit with a coil cover so that the outer peripheral face of the coils may be covered with the peripheral wall and so that the lead wires of the coils may be covered with the side wall. CONSTITUTION:For the outer peripheral section of one collar 18 of a bobbin 16, a terminal fitting plate 22 is saliently provided, and to a pair of terminal segments 24a, 24b provided for the counter-coil side of the terminal fitting plate 22, the lead wires 21a, 21b of coils 21 are respectively connected. In the meantime, for the peripheral wall 28 of a coil cover 15, a notched section 30 wider than the terminal fitting plate 22 is provided, and for the outer peripheral section of the side wall 29, a cover unit 32 confronting the terminal fitting plate 22 in a state that a coil unit 14 is covered with the coil cover 15 is provided. In this manner, the coils or the lead wires can be protected from external force, only by covering the coil unit with the coil cover.

Description

[Detailed description of the invention] The present invention aims to solve the following problems.

(Industrial Application Field) This invention is applicable to various electrical appliances, etc.
This is used in the coil unit of the motor used in the motor.

(Prior Art) In a conventional coil unit for this type of motor, an annular coil is provided concentrically around the outer periphery of a bobbin that has flanges at both ends. Since each lead wire is connected to a terminal piece provided on the outer circumference of the coil, the outer circumferential surface of the coil and the lead wire are exposed to the outside, making it easy for the coil and lead wire to be damaged by external force during assembly and use. There is a problem in that when the lead wire is soldered to the terminal piece, the solder flows onto the coil and damages the coil, and the coil is easily damaged by the heat of the soldering iron.

(Problems to be Solved by the Invention) This invention eliminates the above-mentioned conventional problems, can protect the coil and lead wire from external forces, improves durability, and easily converts the lead wire into a terminal piece. An object of the present invention is to provide a motor coil unit that can be connected to a motor and prevent damage to the coil during connection work.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) When the coil cover is placed over the coil body, the outer peripheral surface of the coil is covered by the peripheral wall of the coil cover, and the lead wire of the coil is covered by the side wall of the coil cover, protecting the coil and lead wire from external force and dust. protected.

Also, when connecting the lead wire to the terminal piece, the lead wire is soldered to the terminal piece on the side opposite to the coil of the terminal mounting plate provided on one of the flanges of the bobbin, so the flow of solder to the coil side is prevented by the terminal mounting plate. Moreover, the heat of the soldering iron is also blocked by the terminal mounting plate, thereby preventing damage to the coil.

(Example) Below, drawings showing examples of the present application will be described. The drawing shows the case where it is applied to a guard motor. 1 is a hollow stator, and is composed of a cylindrical peripheral wall plate 2 and a flat plate-shaped first stator element 3 and a second stator element 4 that close both ends of the peripheral wall plate 2. The first stator element 3 and the second stator element 4 are made of a magnetic material, for example, an iron plate. The first stator element 3 and the peripheral wall plate 2 are integrally formed to constitute a stator body 5.

An engagement groove 2a is formed in the opening edge of the peripheral wall plate 2, and a retaining piece 4a formed on the circumference of the second stator element 4 is engaged with the engagement groove 2a, so that the second stator element 4 is It is fitted onto the peripheral wall plate 2.

Next, 6 is a center rod fixed to the first stator element 3 and second stator element 4, and 7 is a rotating shaft rotatably attached to the center rod 6, which is made of a plastic material such as polyacetal. It is composed of a boss portion 7a and a pinion 7b. A rotor 8 is fixed to the boss portion 7a and is made of a ferrite magnet. Reference numeral 9 denotes a spring interposed between the boss portion 7a and the first stator element 3, which presses the pinion 7b against the second stator element 4 to prevent vertical vibration of the rotor 8.

Next, 10.11 is a magnetic pole piece arranged around the rotor 8, and as shown in FIGS. 1 and 4, parts of the first stator element 3 and the second stator element 4 are moved inward, respectively. A large number of pieces are formed by cutting and raising them at 90 degrees, and the entire magnetic pole piece group 12
It consists of Magnetic pole piece 1 on the second stator element 4 side
1, a gap large enough to pass a transmission gear (described later) is formed between adjacent magnetic pole pieces 11 at positions corresponding to gear retaining recesses (described later).

Next, 13 is an annular coil unit disposed around the magnetic pole piece group 12, and as shown in FIG.
4 and a coil cover 15 made of plastic material. In the coil body 14, a bobbin 16 has flanges 17 and 18 on the outer periphery of both ends of a cylinder 16a, and one end of the cylinder 16a protrudes beyond the rf 18 to form a fitting part 19. 20 is a notch formed in a part of the fitting part 19, and 21 is an annular coil provided on the outer periphery of the cylindrical body 16a, and has lead wires 21a and 21b at the inner and outer peripheral ends, respectively. are doing. Reference numeral 22 denotes a terminal mounting plate that is provided on a part of the outer periphery of one of the flanges 18 and protrudes in the same direction as the protruding direction of the flanges 18, and has a pair of terminal fitting recesses 22a and 22b on the side surface opposite to the coil. Coupling pins 23a and 23b are provided protruding from the center portions of the bottom surfaces of the terminal fitting recesses 22a and 22b, respectively. 24a and 24b are terminal pieces fitted into the terminal fitting recesses 22a and 22b,
The connecting pin 23 is located between each pair of elastic pieces 25a and 2Sb.
a, 23b. 26 is one of the above tsuba 18
A cutout groove is formed on the outer circumferential portion of the cylinder body 16a, and the outer circumferential side thereof is opened, and the groove is formed at a depth that extends to the outer circumferential surface of the cylinder body 16a. The leader line 21a at the inner peripheral end is connected to the bobbin 1 from this notch groove 26.
5 and is soldered to the one terminal piece 24a. Reference numeral 27 denotes a shallow notch groove formed on the outer periphery of the flange 18, from which the leader line 2 at the outer periphery end extends.
1b is pulled out and soldered to the other terminal piece 24b.

Next, in the coil cover 15, 28 is an annular peripheral wall, and has an inner wall surface 28a large enough to cover the outer periphery of the coil body 14. A side wall 29 is integrally connected to the peripheral wall 28 and is formed to be large enough to cover the side surface of the coil body 14.

Reference numeral 30 denotes a notch formed in the peripheral wall 28, and is formed to have a width larger than the width of the terminal mounting @22 in the bobbin outer circumferential direction. Reference numeral 31 denotes an opening/closing wall connected to one edge of the notch 30 so as to be openable and closable by its own elasticity, and an engagement recess ata is formed at the tip, and this engagement recess 31a is connected to the other edge of the notch 30. The closed state can be maintained by engaging with the part. Reference numeral 32 denotes a cover projecting from a part of the outer circumference of the side wall 29, and is formed to face the terminal mounting plate 22 when the coil cover 15 is placed over the coil body 14.

Terminal holders 32a and 32b are formed on the side surface of the lid 32, and each of the terminal holders 32a and 32b has a coupling hole (not shown) that can fit into the coupling bins 23a and 23b. A fitting hole 34 is formed in the side wall 29 and is formed to be able to fit into the fitting portion 19 of the coil body 14 . 35 is a gear holding recess formed in the side wall 29, and is formed by projecting the side wall 29 inward. Reference numeral 36 denotes a gear support shaft protruding from the center of the gear holding recess 35, and its tip end is fitted into the support hole 37 of the second stator element 4.

38 is a storage recess formed in the side wall 29. This gear support shaft 3G may be formed by a pin protruding from the second stator element 4.

Next, reference numeral 39 denotes an annular contour plate stored in the storage recess 38, which passes through the hole 40 and cut groove 41 for passing the magnetic pole piece 11 on the second stator element 4 side, and the gear support shaft 36. A hole 42 is formed for this purpose.

Next, 43.44 is a shaft hole burred into the first stator element 3 and second stator element 4, and 45 is an output shaft rotatably supported by the shaft hole 43.44. It projects outward from l. Reference numeral 46 denotes a gear train storage space formed on the side of the 141-piece group 12 in the hollow portion of the stator 1, in which the well-known reduction gear train 4 is placed.
7 are arranged. The reduction gear train 47 is connected to the output shaft 4
5, a large diameter output gear 48 and an output shaft 45 provided integrally with
A two-stage gear 49 is rotatably fitted to the stator l, and two sets of two-stage gears 51 and 52 are rotatably fitted to an intermediate shaft 50 whose both ends are fixed to the stator l. . The two-stage gears 40, 51, and 52 are small gears 49a,
51a, 52a and large gears 49b, 51b, 52b
Consisting of small gear 52a - large gear 49b - small gear 49a
- Large gear 52b - Small gear 52a - Output shaft 48 are meshed in this order. Reference numeral 53 denotes a transmission gear fitted to the gear bearing shaft 36, which passes between the magnetic pole pieces 11 and connects the pinion 7b.
It is also meshed with the large gear 52b of the reduction gear train 47.

In the above structure, when the coil 21 is energized through the terminal pieces 24a, 24b and the lead wires 21a, 21b, the rotor 8 rotates in one direction as is well known, and the rotation of the rotor 8 is caused to occur. The rotation of the output shaft 45 is transmitted at a reduced speed through the pininan 7b and the reduction gear train 47, and the rotation of the output shaft 45 is transmitted to an external driven instrument. In the above case, the reduction gear train 47 includes three two-stage gears 49.51.
52 and an output gear 48, the rotor 8
can be transmitted to the output shaft 45 with a large deceleration of rotation.

In addition, in the case of the above configuration, the rotor 8
Even if the rotation of the gear is decelerated through the reduction gear train 47 and transmitted to the output shaft 45, the reduction gear train 47
is arranged in a gear train placement space 46 formed in the hollow part of the stage l and on the side of the magnetic pole piece group 12, and the reduction gear train 47 and pinion 7b are arranged in the adjacent magnetic pole pieces 10, 11.
Since the connection is made via the transmission gear 53 disposed through the gap between the stators, when designing a geared motor, there is no need to provide a gear box outside the stator 1, and as a result, the thickness of the geared motor in the rotor axial direction can be reduced. It can be made extremely small and the bulk can be reduced. Further, even if the rotation of the rotor 8 is greatly reduced by the reduction gear train 47 as described above, the reduction gear train 47 is connected to the output gear provided on the output shaft 45 as shown in the third leap. 48, a two-stage gear 49 loosely fitted to the output shaft 45, and two gears 49 loosely fitted to the intermediate shaft 50.
Consisting of stepped gears 51 and 52, an output shaft 45 and a two-step gear 4
9 and two two-stage gears 51, 5.2 are arranged in an overlapping manner, the area required for arranging the reduction gear train 47 in the direction orthogonal to the rotor axis can be reduced, and the geared motor The planar shape of can be made smaller.

Furthermore, in the case of the above structure, when manufacturing the coil unit 13, the coil 21 is first provided on the outer periphery of the bobbin 16, and two of the coils 21 are drawn out! ! 21a, 21
b are pulled out from the notch grooves 26 and 27 to the sides of the bobbin 16, respectively, and then the lead wires 21a are attached to the two terminal pieces 24a and 24b that are fixed to the terminal mounting plate 22 in advance.

21b are soldered to each other to manufacture the coil body 14. In this case, the terminal pieces 24a and 24b are attached to the terminal mounting plate 22.
Since it is attached to the opposite side of the coil 21, it is possible to prevent major accidents such as solder flowing down or damage to the coil 21 due to the heat effect of the soldering iron.
Since the upper portions of 4a and 24b are largely open, the soldering work described above can be carried out easily. Next, with the opening/closing wall 31 of the coil cover 15 open, the terminal mounting plate 22 is fitted into the notch 3o of the coil cover 15 to cover the coil body 14 with the coil cover 15, and then the lid body 32 is connected. The coupling pins 23a and 23b are fitted into the holes to integrate the lid 32 and the terminal mounting plate 22, and the opening/closing wall 31 is closed to engage the engagement recess 31a with the edge of the notch 30. As shown above, attach the coil cover 15 to the coil body 1.
4, as shown in Figure 5, the coil 2
1. The lead wires 21a, 21b and the terminal pieces 24a, 24b are completely covered, ensuring dustproofness and safety against external forces.

Therefore, even if the reduction gear train 47 is disposed in the stator 1 together with the coil body 14 as described above, the performance of the coil body 14 can be maintained for a long time.

In the coil unit 13, the coil cover 15 can be removed from the coil body 14 by pulling the opening/closing wall 31 of the coil cover 15 toward you to open it, and then pulling the coil cover 15 in the rotor axis direction. , the coil cover 15 can be easily attached and detached. In addition, in the case of a geared motor, the reduction gear train 47
is located within the stator l, so that the reduction gear train 47
can be protected from external forces and can be easily handled.

(Effects of the Invention) As described above, in the present invention, the terminal mounting plate 22 is provided protruding from the outer periphery of one of the flanges 18 of the pobbin 16, and a pair of terminal mounting plates 22 provided on the opposite side of the coil are provided on the opposite side of the terminal mounting plate 22. A lead wire 21a of the coil 21 is attached to the terminal pieces 24a and 24b, respectively.
21b, and the terminal mounting plate 2 is attached to the peripheral wall 28 of the coil cover 15, which is formed by connecting the peripheral wall 28 and the side wall 29.
A notch 30 having a width larger than the width of the coil cover 15 is provided at the outer periphery of the side wall 29 of the coil cover 15, and a lid body 32 is provided on the outer periphery of the side wall 29 of the coil cover 15, which faces the terminal mounting plate 22 with the coil cover 15 covering the coil body 14. Therefore, when assembling the coil unit 13, the coil cover 15 is attached to the coil body 14.
The outer periphery of the coil 21 can be surrounded by the peripheral wall 28 by simply covering the coil 21 with the side wall 29 and the lid 32, and the terminal pieces 24a, 24b and the lead wires 21a, 21b can be covered with the side wall 29 and the lid 32.
b can be protected from external forces, improving safety and dustproofness, and making handling easier.

Furthermore, when repairing the coil unit 13, the terminal pieces 24a, 24b and the lead wires 21a, 21b can be exposed by simply removing the coil cover 15 from the coil body 14. The terminal strips 24a, 24b can be visually inspected for failure points such as disconnections, and the terminal strips 24a, 24b can be
When soldering a and 21b, the terminal mounting plate 22
Since soldering is carried out on the opposite side of the coil, accidents such as solder falling and adhering to the coil 21 or damage to the coil 21 due to the heat of the soldering iron can be prevented, and the soldering work can be simplified.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and Fig. 1 is an exploded perspective view of the geared motor, Fig. 2 is a partially omitted plan view, Fig. 3 is an enlarged cross-sectional view of ■-■ cotton, and Fig. 4 is an exploded perspective view of the geared motor. FIG. 5 is a perspective view showing the back side of the second stator element, and FIG. 5 is a perspective view of the coil unit. 13... Coil unit, 14... Coil body, 1
5...Coil cover, 16...Bobbin, 18...
Tsuba, 21...Coil, 21a, 21b...Leader wire,
22...Terminal mounting plate, 24a, 24b...Terminal piece,
26... Notch groove, 28... Peripheral wall, 29... Side wall,
30...notch part, 32...lid body.

Claims (1)

[Claims] On the outer periphery of the bobbin, which has flanges at both ends, a ring-shaped coil having lead wires at the inner and outer ends is concentrically provided to form a coil body, and the lead wires of the coils are connected to the flanges mentioned above. In the coil unit of the motor, which is connected to a pair of terminal pieces, respectively, one of the flanges of the bobbin is provided with a terminal mounting plate on a part of its outer periphery that protrudes in the direction in which the flanges extend. , the pair of terminal pieces are provided on the side surface of the terminal mounting plate on the side opposite to the coil, and a notch groove is provided in one of the flanges, and the inner peripheral end of the coil is drawn out from the notch groove. A wire is pulled out and connected to one of the terminal pieces, a lead wire at the outer peripheral end of the coil is connected to the other terminal piece, and a peripheral wall having an inner wall surface large enough to cover the outer periphery of the coil body; It is equipped with a coil cover formed by integrally connecting a side wall large enough to cover one side of the coil body, and a terminal mounting plate having a width larger than the width of the terminal mounting plate on the peripheral wall of the coil cover. A notch for insertion is provided, and a lid body of a size is formed on the outer periphery of the side wall of the coil cover to cover the terminal mounting plate when the coil cover is placed over the coil body. A motor coil unit featuring: