JP2006180671A - Structure to prevent falling of motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure to prevent falling of a motor by placing at least one normal position element at the appropriate position of the shaft seat of the motor, and strengthening supporting action generated by the motor on a stator. <P>SOLUTION: The structure to prevent falling of the motor includes at least the shaft seat with a slot provided in a recessed manner, and a motor unit which includes an insulating rack and a silicon steel strip, and has the normal position element between the insulating rack and the slot. The normal position element includes a fitting portion, a first end and a second end, and the fitting portion is fitted into the slot. The first end and the second end restrains upper edges of the shaft seat and the silicon steel strip of the motor unit to be lower, respectively, and exert action to make the motor unit to be positioned at a normal position. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a motor drop-off prevention structure, and in particular, the apparatus relates to a structure that uses a motor shaft seat to install a localization element and fix the motor to prevent the motor from falling off. is there.

The development of the modern computer information industry is remarkable, and the computing speed of the CPU of information products is getting faster and the amount of heat generated is increasing. In order to effectively eliminate the amount of heat, a heat dissipating device is used as a basic facility, but the most commonly used heat dissipating device is inconvenient in use and the work of the motor is unstable. Motor bearings are also key to motor mass and work stability.

The stator of the motor is fixed to the fan base shaft seat by gel coating. When the motor is operated, the gel easily peels off due to vibration, and the motor falls off from the orientation, affecting the operation of the motor and its effectiveness, such as noise, heat generation, and efficiency.

In the Republic of Taiwan (Taiwan) publication number 567757, a motor stator fixing structure is disclosed. The holding portion 10B is inserted into the slot of the copper portion 12 of the motor by the fixing hook 10 including the positioning portion 10A and the holding portion 10B, and the positioning portion 10A is the top surface of the coil base 14 of the motor stator. It is in contact with. However, since the altitudes of the copper portion 12 and the coil base 14 are often different, it is difficult to produce and the cost increases. In addition, one side extended to the coil base 14 of the fixed portion 10 </ b> A of the fixed hook 10 extends until it covers the entire coil 18 of the stator 16, thereby preventing friction between the coil 18 and the rotor 22. The coil 18 is rubbed with the rotor 22 and stretched until the localization portion 10A covers the entire coil 18 of the stator 16, and the frictional portion is transferred from the coil 18 to the localization portion 10A to generate noise. The above techniques are inconsistent. Not only does the material of the fixed hook 10 increase, but the localization portion 10A extends until it covers the entire coil 18 of the stator 16, and the amount of heat generated by the operation of the motor is less likely to be dissipated.

  In order to solve the above-mentioned problems, the present invention provides a structure for preventing the motor from falling off, and by providing at least one positioning element at an appropriate position of the shaft seat of the motor, the supporting action generated with respect to the stator of the motor is provided. The purpose is to strengthen and prevent the motor from falling off.

Another object of the present invention is to extend the above-mentioned localization element into the shaft seat, form a preload on the bearing accommodated in the shaft seat, and keep the bearing in a stable operating state.

In order to achieve the above-described object, the present invention provides a structure for preventing a motor from falling off, and includes at least a shaft seat in which a slot is recessed, an insulating rack, and a silicon steel piece, between the insulating rack and the slot. The localization unit has an engaging part, a first end part, and a second end part, and the engaging part fits into the slot, The first end portion and the second step portion respectively restrain the upper edge of the shaft seat and the silicon steel piece of the motor unit, and generate an action for localizing the motor unit.

Prevents the motor from falling off and keeps the bearing in a stable operating state.

FIG. 1 is a view showing a first embodiment of a motor single bearing structure according to the present invention, which includes a fan blade 10, a motor unit 20, and a fan base 30. The fan blade 10 includes a fan hub 11, an axis 12, a motor case 13, and a magnet 14. The axis 12 is installed on an axis base 111 formed at the bottom center of the fan hub 11, and the motor case 13 includes the fan hub 11. The magnet 14 is installed at the side edge in the motor case 13.

The motor unit 20 is installed on the fan base 30, and the motor unit 20 includes an insulating rack 21, a silicon steel piece 22, a circuit board 23, and a coil 24. The silicon piece 22 is provided outside the insulating rack 21, and the coil 24 The silicon steel pieces are wrapped around the insulating rack 21. The center of the fan base 30 has a hollow shaft seat 31, the circuit board 23 is installed between the bottom of the insulating rack 21 and the shaft seat 31, and the shaft center 12 is installed in a housing space formed by the shaft seat 31. At least one bearing 32 is installed between the outside of the shaft center 12 and the shaft seat 31 (the bearing 32 is a roll bearing and has a plurality of spheres in the housing, not shown), The shaft center 12 rotates upon receiving the bearing 32 and has an elastic element R between the bearing 32 and the fan hub 11.

  The inner edge of the shaft seat 31 has a projecting portion 311, and a ring 15 is provided at one end where the shaft center 12 is not connected to the fan hub 11 of the fan blade 10. The bearing 32 is restrained by the projecting portion 311, and the bearing 32 is positioned. . In addition, the bearing 32 generates an interference action with respect to the ring 15 and prevents the shaft seat 31 from coming off when the shaft center 12 is operated.

  In addition, referring to FIG. 2, the shaft seat 31 has a slot 312 recessed, and a positioning element 40 is provided between the slot 312 of the shaft seat 31 and the insulating frame 21 of the motor unit 20. The localization element 40 is substantially annular (see FIGS. 3, 6, 6, and 8) or non-annular (FIGS. 9, 10, 11, and 12) and the engaging portion 41. When the engaging portion 41 is fitted in the slot 312, the first end portion 42 and the second step portion 42 'are respectively connected to the shaft seat 31 and the second end portion 42'. The upper edge of the silicon steel piece 22 of the motor unit 20 is restrained, and the action of localizing the motor unit 20 is generated.

4 and 5 show the second embodiment of the present invention. The difference from the first embodiment described above is that the first end portion 42 extends downward toward the inside of the hollow shaft seat 31. Then, the bearing 32 is lifted to form a preload, and the bearing 32 is stably operated with reduced vibration (when the bearing 32 uses a roll bearing, the bearing housing and its inner sphere are Lack of pre-pressure causes gaps inside, reducing friction, noise and heat generation), improving motor driving performance, preventing motor dropout and increasing service life.

  7 and 8 are possible embodiments of the localization element 40 of the present invention. The difference from the first and second embodiments described above is that the engagement portion 41, the first end portion 42, and the first end portion 42 of the localization element 40 are different. The two end portions 42 ′ are locally installed, and when the engaging portion 41 is inserted into the slot 312, the first end portion 42 and the second end portion 42 ′ are respectively connected to the shaft seat 31 and the silicon steel piece 22 of the motor unit 20. It is to generate an action to restrain the upper edge and localize the motor unit.

9, FIG. 10, FIG. 11 and FIG. 12 show another embodiment of the localization element 40 of the present invention. The difference from the above-described embodiment is that the localization element 40 has a non-annular shape and a plurality of localization elements. 40 is discretely arranged on the motor unit 20 (see FIG. 13). That is, the engaging portion 41 is fitted into the slot 312, and the first end portion 42 and the second end portion 42 ′ restrain the hollow shaft seat 31 and the upper edge of the silicon steel piece 22 of the motor unit 20, respectively. Either the stereotaxic action of the unit 20 is generated (FIGS. 11 and 12), or the first end portion 42 extends downward toward the inside of the hollow shaft seat 31 so that the bearing 32 is raised ( Since FIG. 9, FIG. 10) and others are the same as the first and second embodiments, they will not be described in detail here.

In the present invention, preferred embodiments have been disclosed as described above. However, the present invention is not limited to the present invention, and any person who is familiar with the technology can use various methods within the spirit and scope of the present invention. Therefore, the protection scope of the present invention is based on the content specified in the claims.

It is a figure which shows the 1st Example of this invention. It is a local enlarged view of FIG. FIG. 3 is a three-dimensional view of the localization element of FIG. 2. It is a figure which shows the 2nd Example of this invention. It is a local enlarged view of FIG. FIG. 6 is a three-dimensional view of the localization element of FIG. 5. FIG. 4 is a three-dimensional view of the localization element of FIG. 3. FIG. 7 is a three-dimensional view of the localization element of FIG. 6. FIG. 7 is another three-dimensional view of the localization element of FIG. 6. FIG. 7 is still another three-dimensional view of the localization element of FIG. 6. FIG. 4 is another three-dimensional view of the localization element of FIG. 3. FIG. 4 is still another three-dimensional view of the localization element of FIG. 3. It is a figure which shows the application Example of the localization element of FIG.9, FIG.10, FIG.11, FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Fan blade unit 11 ... Fan hub 111 ... Shaft base 12 ... Shaft center 13 ... Motor case 14 ... Magnet 15 ... Ring 20 ... Motor unit 21 ... Insulation rack 22 ... Silicon steel piece 23 ... Circuit board 24 ... Coil 30 ... Fan Base 31 ... Shaft 311 ... Projection 312 ... Slot 33 ... Hole 40 ... Localization element 41 ... Engagement part 42 ... First end part 42 '... Second end part
R ... Elastic element

Claims (4)

A structure that prevents the motor from falling off, at least,
A shaft seat in which the slot is recessed,
A motor unit having an insulating rack, a piece of silicon steel, and a localization element between the insulating rack and the slot;
Consists of
The feature is that the localization element has an engaging portion, a first end portion, and a second end portion, the engaging portion is fitted into the slot, and the first end portion and the second step portion are A structure in which the shaft seat and the upper edge of the silicon steel piece of the motor unit are restrained to generate an action to localize the motor unit. 2. The structure according to claim 1, wherein the first end portion extends downward into the hollow shaft seat and rests the bearing. The structure according to claim 1 or 2, wherein the engaging element and the second end of the localization element are locally installed. The structure according to claim 1 or 2, wherein a plurality of the localization elements are arranged in a discrete manner on the motor unit.

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