JPH03284137A - Mounting structure of motor - Google Patents

Abstract

PURPOSE:To prevent the chips, which are produced when a tap screw threads inside the lower hole of an adaptor, from falling into a casing by providing the lower hold of the adaptor with a bottom. CONSTITUTION:Through holes 14 and 16 are provided at the upper face 13 of the casing 12 made of magnetic material. A bearing metal 18 is set in the through hole 16. An adaptor 20 is made of synthetic material, or the like, and it can be set in the casing 12, and bosses 24 capable of being set in the through hole 14 of the casing 12 are projected on both sides, and a lower hole 26 having a bottom is made at the top side. The fixation to a mounting member 32 of a motor 10 is performed by screwing a tap screw 38 into the lower hole 26 of the adaptor 20 via a through hole 34 from outside. At this time, even if chips occur, the lower hole 26 has the bottom, so the chips do not fall into the casing.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a motor mounting structure, and in particular, a casing in which a stator is fixed and a rotor is rotatably disposed inside is connected to a mounting member. This article relates to a motor mounting structure that is mounted with screws.

(Prior Art) A conventional motor mounting structure will be described with reference to FIG. 3.

A casing 100 has stator magnets (field magnets) 102 fixed therein, and a rotor 104 rotatably arranged around a shaft 106 at the center thereof.

Attach the casing 100 to the mounting member 108 from the outside using the male screw 11.
0..., the male screws 110... are inserted into the through holes 112... of the mounting member 108, and the female screw holes 116... provided through the mounting surface 114 of the casing 100 are inserted.
・Screw it into place. As a result, the mounting member 1 of the motor 118
Fixing to 08 is completed.

120 is a protruding portion, which is protruded inward from the outer circumferential surface of the casing 100 by press working. The positions of the stator magnets 102 within the casing 100 are determined by the upper ends of the stator magnets 102 coming into contact with the protrusions 120.

(Problems to be Solved by the Invention) However, the above conventional motor mounting structure has the following problems.

In order to drill the female screw holes 116, it is necessary to drill a pilot hole and then carve a #thread by tapping. During tapping work, chips are generated and the female screw hole 11
6...It is removed in the process after the transparent installation, but it is difficult to completely remove it, and even though the motor is determined to be good by inspection after the motor is completed, the cut occurs when tightening the male screws 110... Powder flows from the female screw hole 116 to the casing 10
0 and into the gap between the stator magnet 102 and the rotor 104, causing various troubles such as locking the rotor 104 and causing electrical shorts. There is.

In addition, the stator magnet 102... is attached to the casing 1.
When forming the protrusions 120 for positioning within the casing 100, it is necessary to press in a direction perpendicular to the axis of the casing 100, so pressing along the axis of the casing 100 is different from cutting. There is a problem that an increase in processing cost cannot be avoided.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a motor mounting structure that can suppress the intrusion of chips into the casing and position the stator within the casing with a simple configuration.

(Means for solving problems) In order to solve the above problems, the present invention includes the following configuration.

The first configuration is a motor mounting structure in which a casing in which a stator is fixed and a rotor is rotatably disposed inside is mounted to a mounting member from the outside with male screws, and a through hole is formed in the mounting surface of the casing. an adapter that can be fitted into the casing and has a pilot hole with a bottom formed at a position corresponding to the through hole when the adapter is fitted into the casing; The screw is characterized in that it is a tap screw that can be screwed into the pilot hole from the outside through the through hole.

The second configuration is a motor mounting structure in which a casing in which a stator is fixed and a rotor is rotatably disposed inside is mounted to a mounting member from the outside with male screws, and a through hole is formed in the mounting surface of the casing. is capable of being fitted into the casing, and the inner bottom surface is formed with a male thread that can be screwed into the male thread at a position corresponding to the through hole when the inner bottom surface is fitted into the casing. A synthetic resin adapter is provided which is insert-molded so that the male screw can be screwed into the male screw from the outside through the through hole.

A third configuration is a motor mounting structure in which a casing in which a stator is fixed and a rotor is rotatably disposed inside is mounted to a mounting member from the outside with male screws, and the mounting surface of the casing is A female threaded hole with a bottom, which is capable of being fitted into the casing by drilling a through hole therein, and which can be screwed into the M screw at a position corresponding to the through hole when the casing is fitted into the casing. The present invention is characterized by providing an adapter in which a is formed. Furthermore, in order to position the stator within the casing, as a fourth configuration, in the motor mounting structure of the first, second, or third configuration, the adapter is fitted into the casing. is characterized in that the stator can be positioned within the casing by bringing the stator into contact with an adapter.

Furthermore, the attachment position of the adapter to the casing should be easily determined (as a fifth configuration, in the motor attachment structure of the first, second, third, or fourth configuration, the position corresponds to the through hole of the adapter). It is characterized in that a boss that can be fitted into the through hole is provided in a protruding manner at the portion where the opening is inserted.

(effect) The effect will be explained.

In the first configuration, even if chips are generated when the tap screw is threaded in the lower heat of the adapter, the pilot hole has a bottom, so the chips will not fall into the casing.

In the second configuration and the third configuration as well, the male screw hole or the female screw hole is formed with a bottom, so even if chips of the adapter are generated, they do not fall into the casing.

In the fourth configuration, the position of the stator within the casing is easily determined by bringing the stator into contact with the adapter. In the fifth configuration, the adapter can be easily positioned within the casing.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a mini motor for driving a video camera according to an embodiment, and FIG. 2 is a front sectional view of the assembled mini motor.

First, I will explain the configuration.

A casing 12 is made of a magnetic material to close a magnetic circuit. The lower end surface of the casing 12 is open, and the upper end surface 13, which is the mounting surface, has through holes 14...
and 16 are transparent.

A bearing metal 18 is fitted into the through hole 16.

Reference numeral 20 denotes an adapter, which is made of, for example, synthetic resin, and has a planar shape that can be fitted into the casing 12. A through hole 22 is provided in the center of the adapter 20.

There are bosses 24 on both sides of the through hole 22 that can be fitted into the through hole 14 of the casing 12 when the adapter 20 is fitted into the casing 12 as shown in FIG.
is installed protrudingly. The height of the posts 24 may be formed to be approximately the same as the thickness of the casing 12. Pos 24...
A pilot hole 26 with a bottom is formed in the upper surface. Note that the adapter 20 may be made of metal. Further, the adapter 20 is formed to have such a thickness that it will be at a predetermined position within the casing 12 when a stator, which will be described later, comes into contact with it.

28... is a stator magnet (field magnet) which is an example of a stator, and its upper end surface is in contact with the bottom surface of the adapter 20 to determine its vertical position and is fixed.Although not shown, If a recess into which the upper ends of the stator magnets 28 can fit is provided on the bottom surface of the adapter 20, the vertical and circumferential positions of the stator magnets 28 can be determined at the same time.

A rotor 30 is rotatably disposed in the center of the casing 12.

Reference numeral 32 denotes a mounting member, which is fixed to a mechanical device main body (not shown) to which the motor 1o is fixed. The mounting member 32 is provided with through holes 34 . . . , 36 at positions corresponding to the through holes 14 . The motor 10 is fixed to the mounting member 32 using a tap screw 3, which is an example of an M screw.
8... from the outside through the through holes 34... into the prepared holes 26... of the adapter 2o. At this time, the tap screws 38... have male threads carved on the outer peripheral surface of the pilot holes 26.... Note that even if the adapter 20 is made of aluminum, a male thread can be carved with a tapped screw.

In the above embodiment, the tap screw 38 is used as the male screw for fixing the motor 10, and the prepared hole 2 of the adapter 20 is used as the male screw for fixing the motor 10.
6..., but male screws may be insert-molded with synthetic resin at the positions of the pilot holes 26... of the adapter 20 to form the inner bottom surface of the resin, or the pilot holes 26...
... is a bottomed female screw hole with a male screw carved in advance on the inner circumferential surface,
They may be screwed together using a normal male thread.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and it goes without saying that many modifications can be made without departing from the spirit of the invention. .

(Effects of the Invention) When the motor mounting structure according to the present invention is used, chips are prevented from falling into the casing when the motor is tightened with M screws after the motor is completed. Troubles caused by short circuits can be reliably prevented. In particular, if the configuration of claim 4 is adopted, the stator can be positioned within the casing, and the process of forming a protrusion for positioning the stator on the casing, which is more costly than fitting an adapter, can be omitted, which is economical. It is. Moreover, if the configuration of claim 5 is adopted, there will be significant effects such as ease of positioning of the adapter.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a motor according to the present invention, FIG. 2 is a front sectional view showing the assembled state of the motor, and FIG. 3 is a front sectional view of a conventional motor. 10, 13, 20, 28, 30, 38, motor, 12, casing, upper end,
14...Through hole, -Adapter, 24...Boss, -Stator magnet, Rotor, 32...Mounting member, -Tap screw.

Claims (1)

[Claims] 1. A motor mounting structure in which a casing, in which a stator is fixed and a rotor is rotatably disposed inside, is mounted to a mounting member from the outside with male screws, comprising: a mounting surface of the casing; providing an adapter that is capable of being fitted into the casing by drilling a through hole and having a pilot hole with a bottom formed at a position corresponding to the through hole when the adapter is fitted into the casing; A motor mounting structure characterized in that the male screw is a tap screw that can be screwed into the prepared hole from the outside through the through hole. 2. In a motor mounting structure in which a casing in which a stator is fixed and a rotor is rotatably disposed inside is mounted to a mounting member from the outside with a male screw, a through hole is bored in the mounting surface of the casing. , Insert molding is performed so that the inner bottom surface is capable of fitting into the casing and has a female thread that can be threadedly engaged with the male thread at a position corresponding to the through hole when it is fitted into the casing. A motor mounting structure characterized in that a synthetic resin adapter is provided, and the male screw can be screwed into the female screw from the outside through the through hole. 3. In a motor mounting structure in which a casing in which a stator is fixed and a rotor is rotatably disposed inside is mounted to a mounting member from the outside with male screws, a through hole is bored in the mounting surface of the casing. , an adapter that can be fitted into the casing and has a bottomed female threaded hole that can be screwed into the male thread at a position corresponding to the through hole when fitted into the casing; A motor mounting structure characterized by providing. 4. The motor according to claim 1, 2 or 3, wherein when the adapter is fitted into the casing, the stator can be brought into contact with the adapter and the stator can be positioned within the casing. mounting structure. 5. The motor mounting structure according to claim 1, 2, 3, or 4, wherein a boss that can be fitted into the through hole is provided in a protruding manner at a portion of the adapter corresponding to the through hole.