CN2634156Y

CN2634156Y - Improved fan circulation oil return structure

Info

Publication number: CN2634156Y
Application number: CN 03266576
Authority: CN
Inventors: 李念伦
Original assignee: Dalong Scence & Technology Co Ltd
Current assignee: Dalong Scence & Technology Co., Ltd.
Priority date: 2003-07-02
Filing date: 2003-07-02
Publication date: 2004-08-18
Anticipated expiration: 2013-07-02

Abstract

The utility model relates to an improved fan circulation oil return structure. A bearing arranged on a fan casing is provided with a central shaft hole and is in movable fit with a fan shaft core. An internal oil collection groove arranged on the shaft hole of the bearing is provided with an internal thread oil guide slot, wherein a first radial through hole and a second radial through hole are respectively arranged on the two ends of the internal thread oil guide slot, and an external oil collection groove arranged on the outside wall of the bearing is communicated with the first radial through hole and the second radial through hole, thereby preventing grease oil from overflowing from the end surface of the bearing, and realizing the internal circulation oil return in the shaft hole of the bearing.

Description

The fan circulation oil return structure of improvement

Technical field

The utility model relates to a kind of fan circulation oil return structure of improvement, is meant a kind of fan circulation oil return structure of bearing lubrication structure of brushless DC fan especially.

Background technique

Electronic component can produce heat at calculating process, remove heat if failing effectively looses, electronic component will be easy to the damage of being heated, utilize brushless DC fan to be installed on the electronic component commonly, dispel the heat, known brushless DC fan is provided with various bearing between fan and blower-casting, as ball bearing or oil-impregnated bearing [oily bearing], with rotation and the minimizing noise of promoting fan, and oil-impregnated bearing is sintered into by Cuprum alloy or ferro-alloy and has porous structure, absorbing lubricant oil, yet when the axle center of fan during in the oil-impregnated bearing quick rotation, lubricant oil can move be taken out of and pollute whole blower-casting because of the axle center, simultaneously the oil content of oil-impregnated bearing also can thereby minimizing and skewness, when this fan used when of a specified duration, make the bearing lubrication deleterious, and can increase noise and even do not change.

China's patent announcement No. 471557 " the oil return structure that the fan axle is lubricated " has disclosed a kind of radiation fan, by frame, schedule, rotor is formed, the location periphery of frame forms caulking groove, to form the oil storage tank of sealing, one bearing be one have perforation (be axis hole] body, this bearing body one end extends loop portions, form oil groove in the ring, offer groove on the body in end face, make the lubricant oil that disengages can be via the groove of perforation with end face, and by trench flow oil-return groove and perforation, this oil groove is located at the outer diameter part of this bearing, and this groove is located at the ring of this bearing face, therefore, lubricant oil can flow to the end face of this bearing, makes the oil content of this bearing reduce, and weakens lubrication effect, in addition, oil storage tank on the known bearing and groove are straight line shape, cause lubricant oil to be gathered in single side easily, and the circulation oil return efficient of lubricant oil is comparatively not good.

Summary of the invention

The purpose of this utility model is to provide a kind of fan circulation oil return structure of improvement, it utilizes in the axis hole of bearing and is formed with an inner oil pooling groove, and this inner oil pooling groove is provided with an internal thread oil guide slot [inner screw shape oil-guiding trench], the two ends of this internal thread oil guide slot are respectively equipped with a penetration hole radially, it is communicated to the outer oil pooling groove of bearing outer side, make that spread in this axis hole by turn along with the Fan axial center turn for lubricant oil, and via this radially penetration hole flow into this outer oil pooling groove, to bearing face, reach the effect of circulation oil return in promoting in not overflow.

The utility model is to provide a kind of fan circulation oil return structure of improvement, its bearing is located on the blower-casting, this bearing has a central axis hole, and itself and a Fan axial center are movingly, it is characterized in that: be formed with an inner oil pooling groove in the axis hole of this bearing, this inner oil pooling groove is established an inner thread oil guiding groove, the two ends of this inner thread oil guiding groove are respectively equipped with one first penetration hole and one second penetration hole radially radially, and the outer side wall at this bearing is formed with an outer oil pooling groove, its with this first radially penetration hole with second radially penetration hole be connected.

The utility model is to provide a kind of fan circulation oil return structure of improvement, and this inner thread oil guiding groove is left-handed thread shape or right-handed thread shape.

The utility model is to provide a kind of fan circulation oil return structure of improvement, and this outer oil pooling groove is an outside thread oil collection grooves.

The utility model can avoid lubricant oil to be overflowed by the end face of this bearing, with the oil return that circulates in the axis hole that reaches this bearing.

Description of drawings

Fig. 1 combination of fans part of the present utility model generalized section.

Fig. 2 stereogram of the present utility model.

Fig. 3 top view of the present utility model.

Fig. 4 the utility model is along the schematic cross-section of the 4-4 line of Fig. 3.

Fig. 5 the utility model is along the schematic cross-section of the 5-5 line of Fig. 3.

The schematic cross-section of Fig. 6 the utility model user mode.

Embodiment

About the utility model fan circulation oil return structure, see also Fig. 1, this radiation fan 100 consists predominantly of a blower-casting 110, one impeller 120, one bearing 130 is formed with stator 140, this blower-casting 110 has a pin joint seat 111, this bearing 130 is installed in the pin joint seat 111 of this blower-casting 110, outer periphery at this pin joint seat 111 supplies installing as coil, the stator 140[stator of circuit board etc.] element, driving this impeller 120 with magnetic rotates, this bearing 130 has a central axis hole 131, one outer side wall 132, and the end face 133 between this central authorities' axis hole 131 and this outer side wall 132, wherein this axis hole articulates for the Fan axial center 121 of this impeller 120.When 140 energisings of this stator produce electromagnetic effects, make impeller 120 rotate, and the Fan axial center 121 that is articulated in the central axis hole 131 of this bearing 130 also rotate.

See also Fig. 2,3,4 and 5, this bearing 130 in a tubular form, has a central axis hole 131, one outer side wall 132, and the end face 133 between this central authorities' axis hole 131 and this outer side wall 133, this axis hole 131 of this bearing 130 is formed with an inner oil pooling groove 134, this inner oil pooling groove 134 is provided with an inner thread oil guiding groove 135[inner screw shape oil-guiding trench] [j shown in Fig. 4 and 5, this inner thread oil guiding groove 135 can be left-handed thread shape (Left-hand thread) or right-handed thread shape (Right-hand thread), making that lubricant oil can be driven along with the rotation in axle center 121 in this inner thread oil guiding groove 135 up spreads in this axis hole 131, in the present embodiment, this inner thread oil guiding groove 135 is a V-type cross section oil guide slot, this inner thread oil guiding groove 135 also can be square, circular arc, trapezoidal, wherein the two ends up and down of this inner thread oil guiding groove 135 are respectively equipped with first penetration hole 136 and second penetration hole 137 radially radially, it connects the axis hole 131 and outer side wall 132 of this bearing 130, in addition, the outer side wall 132 of this bearing 130 is formed with an outer oil pooling groove 138, this outer oil pooling groove 138 can be depression annular groove or outside thread oil collection grooves, this outer oil pooling groove 138 with this first radially penetration hole 136 with second radially penetration hole 137 be connected.

See also Fig. 6, above-mentioned bearing 130 is installed in a pin joint seat 111, and this bearing 130 is cooperating of interfering with this pin joint seat 111, make this outer oil pooling groove 138 and this pin joint seat 111 form an outer oil storage space, and non-leakagely go out lubricant oil, when this Fan axial center 121 is done rotation, lubricant oil flows along this inner thread oil guiding groove 135, and axis hole 131 and this inner oil pooling groove 134 in this bearing 130 are spread in turn, just be not subjected to bearing 130, anti-or be tilted to installing, when lubricant oil by Fan axial center 121 drive the end that flows to this inner thread oil guiding groove 135 (upper end], can via first radially penetration hole 136 flow to this outer oil pooling groove 138, and be difficult for the end face 133 of overflow to this bearing 130, having avoided in the past lubricant oil to be thrown off to bearing fully runs off to the shortcoming of bearing outside along end face, and the lubricant oil of this outer oil pooling groove 138 can be again via this second penetration hole 137 radially, or other groove is back to the other end [lower end] of this inner thread oil guiding groove 135, reach lubricant oil and can't help the effect of the excessive interior circulation oil return of bearing face, can not need to install known guarantor's oil ring member of being located between Fan axial center and the bearing.

Protection domain of the present utility model is as the criterion when looking accompanying the claim person of defining, and anyly knows this skill person, and any variation and the modification done in not breaking away from spirit and scope of the present utility model all belong to protection domain of the present utility model.

Claims

1, a kind of fan circulation oil return structure of improvement, its bearing is located on the blower-casting, this bearing has a central axis hole, and itself and a Fan axial center are movingly, it is characterized in that: be formed with an inner oil pooling groove in the axis hole of this bearing, this inner oil pooling groove is established an inner thread oil guiding groove, the two ends of this inner thread oil guiding groove are respectively equipped with one first penetration hole and one second penetration hole radially radially, and the outer side wall at this bearing is formed with an outer oil pooling groove, its with this first radially penetration hole with second radially penetration hole be connected.

2, the fan circulation oil return structure of improvement according to claim 1 is characterized in that: this inner thread oil guiding groove is left-handed thread shape or right-handed thread shape.

3, the fan circulation oil return structure of improvement according to claim 1 is characterized in that: this outer oil pooling groove is an outside thread oil collection grooves.