JPS6223228Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a motor mounting structure for mounting the motor on the mounting surface of a mounting base.

Conventionally, when attaching a motor to a predetermined mounting position of a device, etc., a mounting base (equipment, etc.) to which the mounting leg is fixed is attached to a motor mounting leg extending from a motor case.
The method of installation is to provide a mounting hole that corresponds to the hole on the mounting surface of the mounting leg, and screw a set screw into the hole of the mounting leg and the mounting hole, and the mounting surface of the mounting leg has an ordinary planar shape. ing. Therefore, if you simply use a set screw, there is a problem that the set screw will come loose, so after screwing in the set screw, apply adhesive between the screw and the mounting leg, or install a spring washer. Methods such as interposing it between the leg and the set screw have been adopted. However, the former method has problems in that it uses a harmful organic solvent, which is bad for the health of the workers, and also requires time for the adhesive to dry, resulting in poor workability. Furthermore, the latter method has the problem that the number of parts increases due to the use of spring washers, which increases costs and makes parts management inconvenient.

In view of the problems with the conventional motor mounting structure, the present invention provides a motor mounting leg extending from the motor case with a mounting hole that corresponds to a hole in the mounting surface of the mounting base to which the mounting leg is fixed. At the same time, the intermediate portion of the mounting leg including the mounting hole is formed to be spaced apart from the mounting surface of the mounting base, and by tightening a set screw at the spaced apart portion, the formed portion is elastically bent, and this deflection is In addition to having the effect of a conventional spring washer, the screws are tightened in two places, but the mounting surface is attached to the mounting base surface at three points, resulting in a stable installation with three-point support. An object of the present invention is to provide a motor mounting structure that can reliably fix a motor to a mounting base using only a small number of parts.

Hereinafter, one embodiment of the motor mounting structure according to the present invention will be described, applying it to a cylinder motor of a video tape recorder in which the motor section is directly connected to the cylinder shaft and is directly driven to rotate.

Figure 1 shows a cylinder for a video tape recorder.
2 is an exploded perspective view showing only the motor section of the cylinder unit shown in FIG. 1; FIG. Figure 3 is similar to Figure 1 and 2.
FIG. 3 is a vertical cross-sectional view taken along the axial direction of the motor portion of the cylinder unit shown in the figure.

In FIGS. 1 to 3, 1 is a cylinder consisting of a rotating upper cylinder 2 and a fixed lower cylinder 3,
4 is a cylinder shaft. The cylinder shaft 4 is rotatably supported by a bearing 5 held at a predetermined interval in a bearing storage part 6 of the fixed lower cylinder 3 by a collar 7. A cylinder 2 is fixed, and a rotor of a motor section 8, which will be described later, is fixed to one end of a lower part of the lower cylinder 3 projecting from the lower part thereof, and is rotated by the rotational driving force of the motor section 8. The stator of the motor section 8 is fixed to a screw hole 9 provided on the lower surface of the lower cylinder 3. Reference numeral 10 denotes a magnetic head fixed to the upper cylinder 2. The magnetic head 10 rotates together with the upper cylinder 2 and records magnetic signals on a magnetic tape (not shown) running on the tape guide path 11 of the cylinder 1. These are generally well-known configurations.

Next, the configuration of the motor section 8 will be explained. 12
is a rotor yoke made of press-formed soft iron material.
The rotor yoke 12 is formed into a flat cup shape with a hole 12A formed at the center of the bottom. 13 is fitted into the hole 12A of the yoke 12, and a part thereof 13A
The holder 13 is caulked and fixed concentrically to the yoke 12. The holder 13 is formed into a substantially cylindrical shape with a positioning cylinder portion 13A, and the caulked end side has a cylindrical shape. A recess 13B is formed. Reference numeral 14 denotes an annular permanent magnet formed by alternately magnetizing a total of six N and S poles, and the permanent magnet 14 is fixed to the inner circumference and bottom surface of the yoke 12. The yoke 12, the holding body 13, and the permanent magnet 14 constitute a rotor of the motor section 8.

Reference numeral 15 denotes a stator yoke made of press-molded soft iron material, and the stator yoke 15 has a through hole 15A having an inner diameter larger than the outer diameter of the cylindrical portion 13A of the holding body 13 at the center of the bottom, and a through hole 15A at a predetermined position on the bottom. A hole 15B is provided in the rotor yoke 12, which is formed into a flat cup shape with an inner diameter larger than the outer diameter of the rotor yoke 12, and a cutout 15C cut out to the bottom is formed in a part of the inner circumference of the cup. There is. 16
is a printed wiring board on which electric wiring is printed on the surface opposite to the surface facing the bottom inner wall of the stator yoke 15, and the printed wiring board 16 has a through hole at a position corresponding to the through hole 15A of the stator yoke 15. 16A and a hole 16B, respectively, and an extending portion 16C extending from the notch 15C of the stator yoke 15 to the outside of the stator yoke 15 when disposed on the bottom inner wall of the stator yoke 15. The extending portion 16C is further provided with a plurality of holes 16D.
Further, six single coils 17 ₁ to 17 6 are adhesively fixed on the wiring surface of the printed wiring board 16 at approximately equal intervals, and the single coils 17 ₁ to 17 ₆ are fixed at predetermined positions on the wiring surface of the _printed wiring board 16. electrically connected to the position. Reference numeral 18 denotes a fixing plate fixed to the outer surface of the bottom of the stator yoke 15, and the fixing plate 18 has a through hole 18A having a diameter slightly larger than the outer diameter of the bearing housing 6 protruding from the lower part of the lower cylinder 3. ,
Hole 1 formed in the bottom surface of the stator yoke 15
When the fixing plate 18 is disposed at a predetermined position of the stator yoke 15, the extending portion 16 of the printed wiring board 16 is formed to correspond to the hole 18B.
It consists of an extending portion 18C having a positional relationship corresponding to C, and substantially L-shaped mounting legs 18D and 18E extending in the axial direction at positions displaced by about 180 degrees from each other. The extending portion 18C is provided with a hole 18F formed to correspond to the hole 16D provided in the extending portion 16C of the printed wiring board 16. or,
One of the mounting legs 18D and 18E
is bent into an ordinary L shape, and has a hole 1 in its mounting surface.
9, and the other mounting leg 18D has two leg portions 18D ₁ and 18D ₂ bent from positions widely spaced from each other, and extends approximately 90 degrees further outward from the leg portions 18D ₁ and 18D ₂ .゜Both bent legs 18D ₁ , 1
The bridge part _18D3 is connected between the fixing plate _18D2 , and the bridge part _18D3 is also provided with a hole 19, and the intermediate portion including the hole 19 bulges toward the main body of the fixing plate 18. The mounting surface 18d is retracted from the mounting surface 18d. The positions of the holes 19 provided in the mounting legs 18D and 18F correspond to the positions of the screw holes 9 provided in the lower cylinder 3.

Further, a printed wiring board 1 is provided with single coils 17 ₁ to 17 ₆ that serve as stators of these motor sections 8.
6. The stator yoke 15 and the fixed plate 18 include the eyelet member 20 inserted through the holes 16B, 15B, and 18B, and the holes 16D of the extension portions 16C and 18C,
18F is integrated with the eyelet member 21 through which the eyelet is fixed. Note that an intermediate flange portion 21a having a dimension and thickness approximately equal to the bottom wall thickness of the stator yoke 15 is provided at the intermediate portion of the eyelet member 21.

Next, the method of assembling this motor section 8 to the cylinder 1 will be explained. First, the stator is assembled by integrating the printed wiring board 16 on which the single coils 17 ₁ to 17 ₆ are arranged, the stator yoke 15, and the fixing plate 18. The stator is provided with each center hole 18A,
With the cylinder shaft 4 inserted through the cylinder shafts 15A and 16A, the holes 19 of the mounting legs 18D and 18E are arranged to correspond to the positions of the screw holes 9 provided in the lower cylinder 3, and the holes 19 of the mounting legs 18D and 18E are arranged to correspond to the positions of the screw holes 9 provided in the lower cylinder 3. It is fixed to the lower part of the lower cylinder 3 with an assembly screw 22 screwed into the screw hole 9 of No. 3. At this time, the mounting legs 18D, 18E
Inside, one of the mounting legs 18D is provided with a bridge portion _18D3 including a bulge;
The screw 22 on the D side is fixed more firmly because the bridge portion _18D3 is bent. The rotor is assembled after the stator is assembled in this way, and the rotor, which is integrated with the yoke 12, the holder 13, and the permanent magnets 14,
The cylinder shaft 4 is attached so that a part of it passes through the inner cylinder 13B of the holder 13, and the tip surface of the holder 13 is attached to the bearing 5.
It is positioned on the cylinder shaft 4 while being in contact with the side surface of the cylinder. Then, the rotor is fixed on the cylinder shaft 4 by interposing the washer 23 on the threaded portion 4A of the cylinder shaft 4 extending from the opposite surface of the holder 13 and further screwing in the nut 24.

In this way, an axial gap type flat DC motor is disposed at the bottom of the cylinder 1, and when the motor section 8 is rotated, it is affected by the rotational force of the rotor that is integrally fixed to the cylinder shaft 4. Thus, the cylinder shaft 4 and the upper cylinder 2 are rotated.

In this embodiment, the fixed plate 18 and the stator yoke 15 are formed separately, and the mounting legs 18D, 1
8E is formed from the fixed plate 18, but it goes without saying that it may be formed by bending from the stator yoke 15.

As explained above, the motor mounting structure according to the present invention extends from the motor case and is approximately 180 degrees from each other.
゜Motor mounting legs are formed at displaced positions, one of the mounting legs is bent into an L shape, and its mounting surface has a mounting hole so that it is entirely in close contact with the mounting base. The other mounting leg is formed in a planar shape, and the other mounting leg has two L-shaped leg parts that are widely spaced apart, and a bridge part that is connected between these two leg parts and has a mounting hole in the center. When this bridge part is in the retracted state, protruding and spaced apart mounting surfaces are formed. can be attached at three points, and it is possible to stably attach it with two screws in a three-point support configuration, and when screwing the assembly screw into the mounting hole provided on the bridge and fixing it, the bridge part Since the intermediate portion is bent and tightened, there is no need to use a spring washer, and the number of parts can be reduced to reduce costs.

[Brief explanation of the drawing]

Figure 1 shows a cylinder for a video tape recorder.
2 is an exploded perspective view showing only the motor section of the cylinder unit shown in FIG. 1; FIG. Figure 3 is similar to Figure 1 and 2.
FIG. 3 is a vertical cross-sectional view taken along the axial direction of the motor portion of the cylinder unit shown in the figure. 1...Cylinder, 2...Upper cylinder, 3...Lower cylinder, 4...Cylinder shaft, 18...Fixing plate,
18D, 18E...Motor mounting leg, 19...hole,
9...screw hole, 18D ₃ ...bridge part.

Claims (1)

[Scope of utility model registration request] Among the motor mounting legs extending from the motor case and provided at positions displaced approximately 180 degrees from each other, one of the mounting legs is bent into an L shape, and its mounting surface has a mounting hole. The other mounting leg has two widely spaced L-shaped legs, and is connected between the two legs to form a mounting hole. The motor mounting leg has one planar mounting surface and two spaced apart projecting mounting surfaces. A motor mounting structure characterized in that it is configured to be mounted on a mounting base with a face and a face.