阅读说明：本技术 含油轴承马达新结构 (Novel structure of oil-retaining bearing motor ) 是由 王金莲 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种含油轴承马达新结构,包括固定安装于风扇马达壳上的轴心和安装于风扇框内的轴承,轴心上端与固定连接,所述轴心能够转动的插设于轴承内,轴心圆周外侧面与轴承内侧面之间注有润滑油,其特征在于：所述轴心圆周外侧面上设有若干内凹的压力沟,所述压力沟沿轴心旋转方向横截面逐渐减小,本发明通过在轴心与轴承对应的配合面上设置延着轴心旋转方向设置截面从大到小的沟槽,借助轴心旋转时润滑油从大截面向小截面流动体积被压缩而形成的推力把轴心与轴承隔离,避免了接触摩擦,节能省耗,运行顺畅。(The invention discloses a new structure of an oil-retaining bearing motor, which comprises an axle center fixedly arranged on a fan motor shell and a bearing arranged in a fan frame, wherein the upper end of the axle center is fixedly connected with the bearing, the axle center can be rotatably inserted in the bearing, lubricating oil is injected between the outer side surface of the circumference of the axle center and the inner side surface of the bearing, and the new structure is characterized in that: the invention sets a groove with a section from large to small along the rotation direction of the axis on the matching surface of the axis and the bearing, and separates the axis from the bearing by the thrust formed by compressing the flowing volume of the lubricating oil from the large section to the small section during the rotation of the axis, thereby avoiding contact friction, saving energy and consumption and smoothly running.)

1. The utility model provides an oiliness bearing motor new construction, includes axle center (1) of fixed mounting on fan motor shell and installs bearing (2) in the fan frame, axle center upper end and fixed connection, the axle center can be pivoted insert locate the bearing in, annotate between axle center circumference lateral surface and the bearing medial surface lubricating oil, its characterized in that: a plurality of concave pressure grooves (3) are arranged on the outer side surface of the circumference of the axis, and the cross section of each pressure groove is gradually reduced along the rotation direction of the axis.

2. The new structure of oil-impregnated bearing motor according to claim 1, wherein: the pressure grooves are uniformly arranged at intervals along the circumferential direction of the axis to form at least one annular distribution zone.

3. The new structure of oil-impregnated bearing motor according to claim 1, wherein: the pressure groove is in any one or combination of a triangle shape, a herringbone shape and an arrow shape.

4. The new structure of oil-impregnated bearing motor according to claim 1, wherein: the clearance between the outer diameter of the shaft center and the inner diameter of the bearing is 0.002-0.005 mm.

5. The new structure of oil-impregnated bearing motor according to claim 1, wherein: the bearing is characterized in that the edges of two ends of the bearing are provided with chamfer structures (4), a circle of annular neck (5) which is concave inwards in the radial direction is formed on the axis, the lower side face of the neck is arranged between the upper end face of the bearing and the lower side edge of the chamfer face of the upper end of the bearing, and the upper side face of the neck of the axis is higher than the upper end face of the bearing.

6. The new structure of oil-impregnated bearing motor according to claim 5, wherein: the ratio of the diameter of the axle center neck to the outer diameter of the axle center is between 0.6 and 0.95.

7. The new structure of oil-impregnated bearing motor according to claim 1, wherein: the length ratio of the height of the bearing to the axial center is between 0.3 and 1.

8. The new structure of oil-impregnated bearing motor according to claim 1, wherein: an arc surface (6) is formed at the lower end of the shaft center, a friction plate (7) is fixedly arranged at the lower end of the bearing, the arc surface at the lower end of the shaft center is in contact with the friction plate, and the intersection line of the arc surface at the lower end of the shaft center and the cylindrical surface is lower than the upper side edge line of the chamfered surface at the lower end of the bearing.

9. The new structure of oil-impregnated bearing motor according to claim 8, wherein: the fan is characterized in that a base (8) is fixedly arranged at the lower end of a fan frame (9), a shaft sleeve (10) is fixedly arranged on the base, a bearing is inserted into the shaft sleeve, a fixing ring (11) is fixedly arranged on the inner side of the opening end of the shaft sleeve, a friction plate is placed on the bottom surface of the inner side of the shaft sleeve, an annular gasket (12) is arranged on the upper side of the friction plate, and the upper end and the lower end of the bearing respectively abut.

10. The new structure of oil-impregnated bearing motor according to claim 1, wherein: the shaft center is fixedly connected with the fan motor shell (13) in an in-mold injection molding, welding or interference fit mode, and the shaft sleeve is fixedly connected with the fan frame base in an in-mold injection molding, interference fit or buckling connection mode.

Technical Field

The invention relates to a fan, in particular to a novel structure of an oil-retaining bearing motor.

Background

The oil-impregnated bearing motor often encounters the problem of contact friction between the shaft center and the bearing due to insufficient oil film strength, the common treatment method is to improve the oil film strength and reduce the contact friction by improving the part precision and reducing the shaft clearance, and the treatment method increases the product cost and the processing difficulty.

Disclosure of Invention

In order to overcome the defects, the invention provides a novel structure of an oil-retaining bearing motor, which can isolate an axis from a bearing and avoid contact friction.

The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides an oiliness bearing motor new construction, includes axle center and the bearing of installing in the fan frame of fixed mounting on fan motor shell, axle center upper end and fixed connection, the axle center can be rotated insert locate the bearing in, annotate between axle center circumference lateral surface and the bearing medial surface lubricating oil, its characterized in that: the outer side surface of the circumference of the axis is provided with a plurality of concave pressure grooves, and the cross section of each pressure groove is gradually reduced along the rotation direction of the axis.

As a further improvement of the invention, the pressure grooves are uniformly arranged at intervals along the circumferential direction of the shaft center to form at least one annular distribution belt.

As a further improvement of the invention, the pressure channel is in any one or more combination of a triangle shape, a herringbone shape and an arrow shape.

As a further improvement of the invention, the clearance between the outer diameter of the shaft center and the inner diameter of the bearing is between 0.002 and 0.005 mm.

As a further improvement of the invention, the two end edges of the bearing are formed with chamfer structures, a circle of annular neck part which is concave inwards in the radial direction is formed on the axle center, the lower side surface of the neck part is arranged between the upper end surface of the bearing and the lower side edge of the chamfer surface at the upper end of the bearing, and the upper side surface of the neck part of the axle center is higher than the upper end surface of the bearing.

As a further improvement of the invention, the ratio of the diameter of the axle center neck to the outer diameter of the axle center is between 0.6 and 0.95.

As a further improvement of the invention, the ratio of the height of the bearing to the length of the axle center is between 0.3 and 1.

As a further improvement of the invention, the lower end of the shaft center forms an arc surface, the lower end of the bearing is fixedly provided with a friction plate, the arc surface at the lower end of the shaft center is contacted with the friction plate, and the intersection line of the arc surface at the lower end of the shaft center and the cylindrical surface is lower than the upper side edge line of the chamfer surface at the lower end of the bearing.

As a further improvement of the invention, the lower end of the fan frame is fixedly provided with a base, a shaft sleeve is fixedly arranged on the base, a bearing is inserted in the shaft sleeve, a fixing ring is fixedly arranged on the inner side of the opening end of the shaft sleeve, a friction plate is arranged on the bottom surface of the inner side of the shaft sleeve, an annular gasket is arranged on the upper side of the friction plate, and the upper end and the lower end of the bearing are respectively and tightly abutted against the surfaces of the.

As a further improvement of the invention, the shaft center is fixedly connected with the fan motor shell in an in-mold injection molding, welding or interference fit manner, and the shaft sleeve is fixedly connected with the fan frame base in an in-mold injection molding, interference fit or buckling connection manner.

The invention has the beneficial effects that: the invention separates the axle center from the bearing by the thrust formed by compressing the flowing volume of the lubricating oil from the large cross section to the small cross section when the axle center rotates by arranging the groove with the cross section from large to small along the rotating direction of the axle center on the matching surface of the axle center and the bearing, thereby avoiding contact friction, saving energy and consumption and having smooth operation.

Drawings

FIG. 1 is an axial perspective view of the prior art;

FIG. 2 is a perspective view of a first embodiment of the present invention;

FIG. 3 is a perspective view of a second embodiment of the present invention;

FIG. 4 is a schematic front view of a fan constructed in accordance with the present invention;

FIG. 5 is a schematic diagram showing the ratio of the axial center to the radial dimension of the bearing;

FIG. 6 is a schematic view showing the relationship between the axial center and the axial position of the bearing;

FIG. 7 is a schematic view of an assembly structure of a bearing and a shaft sleeve;

FIG. 8 is a first expanded view of the hub surface of the present invention;

FIG. 9 is a second expanded view of the hub surface of the present invention;

FIG. 10 is a third expanded view of the hub surface of the present invention;

fig. 11 is a fourth developed view of the axial surface of the present invention.

Distance between lower side surface of axle center neck and lower side edge of bearing upper end chamfer surface- - -A

Distance between upper side surface of axle center neck and upper end surface of bearing- - -B

Axle center neck diameter-c axle center outer diameter-D bearing inner diameter-D

E, the distance between the intersection line of the arc surface and the cylindrical surface at the lower end of the axis and the edge line of the upper side of the chamfer surface at the lower end of the bearing is E

Distance between lower side surface of axle center neck and upper end surface of bearing- - -F

Height of matching surface of axis and bearing-L height of bearing-L

Height of axis-H coil stator-14 circuit board-15

Magnet 16 fan-17

Detailed Description