JPH0657063U - Small motor device - Google Patents

Abstract

(57) [Summary] [Purpose] The motor can be easily attached to the mounted object. [Structure] A plurality of protrusions 14a and 14b are formed by cutting and raising the bottom surface of the outer case 11 of the motor M by pressing or the like.
The motor M is attached to the attached body 18 by forming the above, and bending the tip of the protruding portion through the through hole formed in the bottom surface of the attached body 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small motor device having a structure in which a small motor is attached to a mounted body.

[0002]

[Prior art]

 Conventionally, permanent magnet field type small DC motors can be driven by batteries, etc., and because of their small shape and large torque, they are widely used in various small devices, especially portable devices. When this small motor is attached to a device driven by the motor, it is common to attach it to the mounted object to which the motor is attached with a screw. 4A and 4B show an outer case of a conventional small-sized motor. FIG. 4A is a front view of a bottom portion, and FIG. 4B is a side sectional view. FIG. 5 is a partial cross-sectional side view of a state in which a motor using this outer case is attached to a mounted body.

In FIG. 4, reference numeral 1 denotes an outer case of a motor, which is formed by drawing an iron plate into a cup shape including a cylindrical portion 1a and a bottom portion 1b. A bearing accommodating portion 2 for accommodating the bearing of the output shaft of the rotor is formed at the center of the bottom surface portion 1b by being drawn outward. Reference numeral 3 is a center hole for accommodating the bearing. Reference numerals 4a and 4b denote screw holes formed in a bottom surface portion symmetric with respect to the center at a position 180 ° away from each other in the shape of a pottery directed inward, and a screw is cut into the inside thereof.

In FIG. 5, M is a motor using the outer case 1, 5 is a cover case made of an insulating material fitted in the outer case 1, 6 is a terminal for connecting to a power source, and 7 is a rotor shaft. Reference numeral 8 denotes a body to be attached to a device driven by a motor (such as a small pump). The body to be attached is composed of a cylindrical portion and a bottom portion like the outer case, and the bottom portion has a screw hole 4a of the outer case 1. Holes for passing screws are formed at positions corresponding to 4b. A center hole for letting the bearing housing 2 escape is also formed in the bottom surface of the mounted body 8. The motor M is brought into contact with the bottom surface of the mounted body 8 so that the bottom surface of the outer case is in contact, and the screws 9a and 9b are screwed into the screw holes 4a and 4b of the outer case 1 to mount the motor M on the mounted body 8.

[0005]

[Problems to be solved by the device]

 However, in such a conventional small-sized motor device, it takes a lot of time to press the outer case of the motor to form a screw hole, and thus the cost is high, and the length of the screw to be screwed is large. If the length is too long, it will come into contact with the rotor inside the motor and cause an accident.Therefore, it goes against the downsizing in order to create a space in the motor, and it is necessary to assemble it in order to fix it in a narrow space in the mounted object. There were many drawbacks such as difficulty in automating.

[0006]

[Means for Solving the Problems]

 In the compact motor device according to the present invention, when the motor (M) is attached to the mounted body (18), the outer case (11) of the motor includes the metal plate from the cylindrical part (11a) and the bottom part (11b). It has a plurality of protrusions (14a, 14b) formed by cutting and raising from the bottom to the outside, and the attached body corresponds to the protrusion of the outer case. Through holes (18a, 18b) are provided at the specified positions.

[0007]

[Action]

 The bottom of the outer case (11) is brought into contact with the mounted body (18), and the tip of the protrusion is bent with the protrusion (14a, 14b) penetrating the through holes (18a, 18b). To attach the motor to the mounted body.

[0008]

【Example】

 Hereinafter, the small motor device according to the present invention will be described in detail. 1A and 1B show an outer case of a motor used in a small-sized motor device of the present invention. FIG. 1A is a front view and FIG. 1B is a side sectional view. In FIG. 1, 11 is an outer case of the motor, which is the same as that of FIG. 4 except for the screw hole portion. Reference numeral 11a is a cylindrical portion, 11b is a bottom surface portion, 12 is a bearing housing portion, and 13 is a central hole. Protrusions 14a and 14b are formed symmetrically with respect to the center and separated by 180 °, and are formed by cutting and raising from the bottom surface portion 11b toward the outside.

FIG. 2 is a partial cross-sectional side view of a state in which the motor M using the outer case 11 is attached to a mounted body. FIG. 3 is a cross-sectional view of the attached body. In FIG. 2, reference numeral 15 is a lid case, 16 is a terminal, and 17 is a rotor shaft for taking out the output of the motor. Reference numeral 18 denotes a body to be mounted, and this body to be mounted 18 is composed of a cylindrical portion and a bottom surface portion like the outer case 11. As shown in FIG. 3, through holes 18a and 18b of substantially the same shape are formed on the bottom surface of the mounted body 18 at positions corresponding to the projections 14a and 14b of the outer case 11, and the outer surface of the outer case 11 is also centered. A center hole 18c is formed to allow the bearing housing portion 12 of the case 11 to escape.

The motor M is brought into contact with the mounted body 18 so that the bottom surface of the mounted body 18 contacts the bottom surface of the outer case 11. At this time, the protrusions 14a and 14b penetrate the through holes 18a and 18b, and the tips thereof project into the inside of the mounted body 18. The bearing accommodating portion 12 is inserted into the center hole 18c. If the tips of the protrusions 14a and 14b protruding into the attached body 18 are bent, the protrusions 14a and 14b will not come off from the through holes 18a and 18b, and the motor M will be attached to the attached body 18.

In the above embodiment, the outer case is assembled to the motor and then attached to the mounted body. However, the outer case may be mounted to the mounted body in advance and the outer case may be assembled to the motor in this state. . Further, as the outer case, an iron plate is used when it also serves as a field yoke, but when it is not necessary to pass magnetic flux, another metal plate that can be easily processed can be used.

[0012]

[Effect of device]

 According to the present invention, since the protrusion of the outer case for mounting the motor on the mounted body can be easily formed by press working or the like, the processing time can be extremely shortened and the cost can be reduced. Further, since no screw is used, it is not necessary to provide an extra space for the long screw in the motor as in the conventional case, and the overall shape can be made small. Further, since the motor can be attached to the attached body only by bending the tip of the protrusion inside the attached body, it is possible to easily automate the assembly process unlike the case of screwing.

[Brief description of drawings]

1 shows an outer case of a motor used in a small motor device of the present invention, (a) is a front view and (b) is a side sectional view.

FIG. 2 is a partial cross-sectional side view of a state in which a motor using the outer case of FIG. 1 is attached to a mounted body.

FIG. 3 is a cross-sectional view of an attached body used in FIG.

FIG. 4 shows an outer case of a motor used in a conventional small-sized motor device, in which (a) is a front view and (b) is a side sectional view.

5 is a partial cross-sectional side view of a state in which a motor using the outer case of FIG. 4 is attached to a mounted body.

[Explanation of symbols]

 11 Outer Case 12 Bearing Housing 14a, 14b Projection 15 Lid Case 16 Terminal 17 Rotor Shaft 18 Mounted Object 18a, 18b Through Hole

Claims (1)

[Scope of utility model registration request] 1. A small motor device in which a motor is attached to a body to be attached, wherein an outer case of the motor is formed by forming a metal plate into a cup shape including a cylindrical portion and a bottom portion, and the bottom portion is attached to the bottom surface. Has a plurality of protrusions formed by cutting and raising from the outer portion, and the attached body has a through hole at a position corresponding to the protruding portion of the outer case, and the attached body has a bottom portion of the outer case. A small motor device having a structure in which the motor is attached to the mounted body by bending the tip of the protruding portion that has come out inside the mounted body with the protruding portion penetrating through the through hole.