JP3135413U - Structure for preventing leakage of bearing lubricant oil for fans for cooling electronic equipment - Google Patents

Abstract

An object of the present invention is to prevent leakage of lubricating oil in a bearing of a cooling fan of an electronic device.
In a cooling fan comprising a base 21, a fan 22 and a bearing 23, a shaft 211 is provided in the base to accommodate the bearing, and a concentric annular wall structure 223 and the concentric annular wall are provided at the center of the fan. A shaft rod 221 connected to the structure is provided. The shaft rod is inserted into the bearing center hole, and the concentric annular wall structure is disposed relative to the shaft rod outer peripheral surface.
A groove-shaped first oil reservoir is formed on the inner peripheral surface of the bearing, and a first oil reservoir 2113 is formed at the bottom of the shaft cylinder so that the oil rising from the shaft rod 221 through the shaft rod is concentric annular wall structure. It is received by the first ring-shaped concave portion 2231 at the upper end and dropped from the second ring-shaped convex portion 2232 at the peripheral edge to be collected.
[Selection] Figure 3

Description

The present invention relates to an oil leakage prevention structure including an oil bearing in a cooling fan of an electronic device, and more particularly to an oil leakage prevention structure that extends the service life of the fan by avoiding the consumption of lubricating oil in the bearing.

  As shown in FIG. 1, the known structure includes a main body 10 and a fan 14, and a stereotaxic base 11 is connected to the center of the main body 10. A hollow shaft cylinder 111 is projected on the stereotaxic base 11, and a bearing 12 is installed in the shaft cylinder 111. A coil 13 is installed outside the shaft tube 111. On the outer surface of the fan 14, a wing piece 141 is installed in an annular shape, on the inner periphery of the fan 14, the magnetic ring 142 and the coil 13 are installed with the magnetic poles facing each other, and the shaft 143 is installed on the inner side surface The shaft rod 143 is inserted into the above-described bearing 12 and engaged with the engagement ring 15 and the oil ring 16.

However, the above structure has a problem in actual use. The bearing 12 prevents wear due to friction of the shaft rod 143 that rotates at high speed by the lubricating oil impregnated in the sintered material. However, since the oil ring 16 is only installed on the shaft rod 143, the lubricating oil is used as the shaft cylinder. Since the leakage from the front end of the front end of 111 cannot be stopped, it leaks to the outside and flows outward due to the centrifugal force of the shaft rod 143. Further, the leakage from the gap between the shaft cylinder 111 and the shaft rod 143 takes place. If the lubricating oil decreases and the lubricating oil required for the rotation of the shaft rod 143 is exhausted, the lubricating oil will lose its effect, wear out due to friction, further generate noise, and shorten the service life. become.
Japanese Patent Laid-Open No. 2000-12751

    The problem to be solved is a solution to the point that the lubricating oil leaks out, so that the effect of the lubricating oil is likely to be lost, and wear is caused by friction.

  The present invention is an electronic device cooling fan comprising a base, a fan, and a bearing. A shaft cylinder is installed on the base to accommodate the bearing, and a concentric annular wall structure and a concentric annular wall structure are provided in the center of the fan inner surface. Install a single shaft to connect. A shaft rod is inserted through the bearing center hole, and a concentric annular wall structure is provided on the outer periphery side of the shaft rod and is opposed to the inner surface of the first end of the bearing. The bearing center hole is penetrated at both ends of the bearing to insert shaft shafts, conical inclined surfaces are formed at both ends of the center hole, and a groove-like second oil reservoir is formed on the inner surface of the center hole. The main feature is to block the flow of the lubricating oil in the radial direction relative to the shaft rod and return it to the bearing to prevent the lubricating oil from leaking out.

  The oil leakage prevention structure for an electronic device cooling fan including the oil bearing according to the present invention has an advantage of extending the service life of the fan by avoiding the consumption of lubricating oil in the bearing.

  In order to solve the above-mentioned drawbacks of the known technology, an oil leakage prevention structure for a cooling fan for electronic equipment including an oil bearing that prevents leakage of lubricating oil by a kind of oil reservoir is provided.

  By installing the second oil reservoir on the inner surface of the center hole of the bearing, the lubricating oil between the bearing and the shaft rod is moved upward along the shaft center depending on the capillary action and centrifugal force to prevent oil leakage. To prevent.

  Conical inclined surfaces are formed on the inner surfaces of both ends of the center hole of the bearing, and the oil dropped from the concentric annular wall of the shaft rod located above is collected and maintained, and the lubrication state between the bearing and the shaft rod is maintained.

  A concentric annular wall structure is provided inside the fan, and the concentric annular wall structure corresponds to the inner surface of the open end of the shaft cylinder, so that the backflow of the lubricating oil is stopped and permeated into the bearing.

  In order to achieve the above-mentioned object, the present invention provides “an oil leakage prevention structure for an electronic equipment cooling fan including an oil bearing”. In the fan including a base, a fan and a bearing, a shaft cylinder is installed on the base. The concentric annular wall structure and the shaft rod connected to the concentric annular wall structure are installed on the inner surface of the fan. The shaft rod is inserted into the bearing described above, and the concentric annular wall structure is provided outside the shaft rod and corresponds to the inner surface of the first end adjacent to each other. The bearing includes a center hole, and both ends of the bearing are penetrated into the center hole, and the above-described shaft rod is inserted therein. Further, at least the conical inclined surfaces are installed at both ends of the center hole, and at least the second oil reservoir is installed on the inner surface of the center hole, adjacent to the shaft shaft, and the lubricating oil is sealed in the radial direction to seal the bearing. Permeate to prevent lubricant from leaking out.

  The above objects and their structural and functional characteristics of the present invention will be described by way of an embodiment based on the attached diagram.

〔Example〕
The present invention provides an “oil leakage prevention structure for an electronic device cooling fan including an oil bearing”, and the drawings show an embodiment of the present invention. As shown in FIGS. 2, 3, 4, 5, 6, 7 and 8, a base 21, a fan 22 and a bearing 23 are included. The base 21 is installed in the fan frame or on the radiator, and the shaft cylinder 211 is installed there. A bearing 23 is accommodated in the shaft cylinder 211, and the fan 22 is provided with a shaft rod 221 inserted into the bearing 23, and the fan 22 is pivotally mounted on the base 21.

  The shaft cylinder 211 has a first end 2111 and a second end 2112, of which the first end 2111 communicates with the shaft cylinder 211, a first oil reservoir 2113 is installed in the second end 2112, and The abrasion-resistant piece 2114 and at least the engaging part 2115 are sequentially installed. In this figure, the second end 2112 is sealed. However, the second end 2112 is not limited to such a structure, and may be open, or the second end 2112 may be sealed with a bottom cover. (Figure not shown).

  A shaft rod 221 and a concentric annular wall structure 223 are installed on the inner surface of the fan 22, and the concentric annular wall structure 223 is provided on the outer periphery of the shaft rod 221 and faces the inner wall surface of the first end 2111. In a specific implementation, the concentric annular wall structure 223 includes at least a first ring-shaped concave portion 2231 and a second ring-shaped convex portion 2232, and the first and second ring-shaped concave and convex portions 2231 and 2232 are formed on the open end 2111 described above. The first ring-shaped concave portion 2231 is provided outside the shaft rod 221, the second ring-shaped convex portion 2232 is installed outside the first ring-shaped concave portion 2231, and the inner wall surface of the first end 2111 described above. Relative

  The bearing 23 is installed in the shaft cylinder 211 and has a center hole 231. The center hole 231 penetrates both ends of the bearing 23, conical inclined surfaces 233 are formed on the inner surfaces of both ends of the center hole 231, and at least a second oil reservoir 234 is provided on the inner peripheral surface of the center hole 231. Separately, at least one concave groove 235 is provided on the outer surface of the bearing 23 described above, and the concave groove 235 extends from one end of the bearing 23 to the other end. In the drawing, the second oil reservoir 234 is extended in the axial direction (see FIG. 7). However, the present invention is not limited to such a configuration, and in FIG. Yes.

  When one end of the shaft rod 221 is inserted into the center hole 231 of the bearing, it is hooked and fixed to the hooking part 2115 and is stored in the first oil reservoir 2113. The second oil reservoir 234 on the inner surface of the center hole 231 faces the outer surface of the shaft rod 221.

  Thus, when the shaft rod 221 rotates in the bearing 23, the lubricating oil in the first oil reservoir 2113 rises along the shaft rod 221 and keeps most of the lubricating oil in the second oil reservoir 234. The above-mentioned lubrication state is maintained. A part of the lubricating oil rising along the shaft rod 221 is restrained by the first and second ring-shaped uneven portions 2231 and 2232, falls into the conical inclined surface 233, and follows the concave groove 235 on the surface of the bearing 23. Therefore, the lubricating oil is prevented from leaking out.

  When the aforementioned conical inclined surface 233 receives the lubricating oil, the lubricating oil forms a lubricating oil protection region on the outer surface of the conical inclined surface 233 and the shaft rod 221 with the lubricating oil, and the bearing 23 depends on the inclination of the shaft rod 221. Prevent wear and tear phenomenon.

  In order to meet the requirements of utility model registration, a kind of “Anti-leakage structure for electronic equipment cooling fans including oil bearings” provided by the present invention is filed under the law.

  The above is only a preferred embodiment of the present invention, and all changes due to the method, shape, structure and apparatus described above belong to the scope of the present invention.

It is an instruction diagram of a known structure. FIG. 3 is a diagram illustrating a three-dimensional decomposition instruction according to the present invention. FIG. It is an implementation cross-section assembly instruction drawing of the present invention. It is a cone-shaped inclined surface enlargement instruction | indication figure of a center hole end. It is a cone-shaped inclined surface enlargement instruction | indication of another end of a center hole. It is a 2nd oil reservoir instruction | indication figure of implementation of this invention. It is a 2nd oil reservoir part state instruction diagram of implementation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Main body 11 Stem base 111 Shaft cylinder 12 Bearing 13 Coil 14 Fan 141 Wing piece 142 Magnetic ring 143 Shaft 15 Engagement ring 16 Oil ring 21 Base 211 Shaft cylinder 2111 First end 2112 Second end 2113 First oil reservoir 2114 Polishing resistant piece 2115 Engagement part 22 Fan 221 Shaft 223 Concentric annular wall structure 2231 1st ring-shaped recessed part 2232 2nd ring-shaped convex part 23 Bearing 231 Center hole 233 Conical inclined surface 234 2nd oil reservoir part 235 Concave groove

Claims (6)

In electronic equipment cooling fans including bases, fans, and bearings,
A shaft cylinder is installed at the center of the base, and a first oil reservoir is provided at the bottom end of the shaft cylinder.
The fan is provided with a shaft rod and a concentric annular wall structure surrounding the shaft rod at the center thereof, and the concentric annular wall structure is disposed relative to the inner peripheral surface of the upper end of the shaft cylinder,
The bearing is provided in the shaft cylinder with a center hole penetrating vertically, and the shaft rod is inserted into the center hole, and a conical inclined surface is formed on at least one of the inner peripheral surfaces of both ends of the center hole. And an oil leakage prevention structure for an electronic device cooling fan including an oil bearing, wherein at least one groove-shaped second oil reservoir is provided on an inner peripheral surface of the bearing in contact with the shaft.   The electronic device cooling fan including an oil bearing according to claim 1, wherein the bearing has at least one groove formed on an outer surface thereof, and the groove extends from one end of the bearing to the other end. Oil leakage prevention structure.   The concentric annular wall structure forms a first ring-shaped recess surrounding the shaft rod between the upper inner shaft shaft, and further surrounds the first ring-shaped recess on the outer side of the shaft cylinder upper end. 2. The oil leakage prevention structure for an electronic device cooling fan including an oil bearing according to claim 1, further comprising a second ring-shaped convex portion that hangs down relative to the inner peripheral surface.   2. The structure for preventing leakage of an electronic device cooling fan including an oil bearing according to claim 1, wherein the second oil reservoir extends from the middle portion of the inner surface of the center hole to one end.   5. The oil leakage prevention structure for an electronic device cooling fan including an oil bearing according to claim 1, wherein the second oil reservoir extends in the axial direction.   The oil leakage prevention structure for an electronic device cooling fan including an oil bearing according to claim 1, wherein the second oil reservoir extends in a spiral shape.

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