TWM469391U - Oil-retaining structure of spindle reversed type heat dissipation fan motor - Google Patents

Description

Oil-retaining structure of shaft-inverted cooling fan motor

This creation relates to a reverse-discharge cooling fan motor, and in particular to an innovative design of the oil-retaining structure of an inverted cooling fan motor.

According to the structure of the axially-disclosed heat-dissipating fan motor of the present invention, the main feature is that the axial center is coupled to the stator base portion of the heat-dissipating fan motor and protrudes toward the rotor direction, and the rotor is relatively formed with a bearing. The sleeve is assembled for the shaft to be pivoted with the axis of the stator base.

This creation is especially for the oil-retaining structure of the axial-reverse cooling fan motor. As for its conventional structural design, in order to achieve the oil-retaining function, it is usually assembled in the bearing sleeve of the rotor to block the oil. The oil barrier ring or the labyrinth ring is used to achieve the components. However, these conventional structural types have been found in practical application experience, and there are still problems such as excessive assembly of components and difficulty in assembly, high manufacturing cost, high defect rate, and the like. Disadvantages, especially for the shaft-shaped inverted cooling fan motor products with thinner dimensions, because the bearing sleeve of the rotor is quite small and narrow (note: only 4mm to 5mm in diameter), it is necessary to further reassemble the aforementioned oil resistance. The technical difficulty of the ring body, labyrinth ring and other components is obviously much more difficult than the fan motor products of the general specification wind.

Therefore, in view of the problems existing in the oil-retaining structure of the above-mentioned axial-inverted heat-dissipating fan motor structure, how to develop an innovative structure with more ideal and practicality is also necessary for the relevant industry to make further efforts to develop breakthroughs. Goals and directions.

In view of this, the creator has been engaged in the manufacturing development and design experience of related products for many years. After the detailed design and careful evaluation of the above objectives, the creator will have a practical and practical creation.

The main purpose of this creation is to provide an oil-retaining structure for a shaft-centered anti-cooling fan motor. The technical problem to be solved is to develop a new type of axial-reverse cooling fan motor with more ideal and practicality. The structure is an innovative breakthrough for the goal. The oil-retaining structure is disposed at a position corresponding to a bearing seat of the rotor-impeller group, and a shaft center of the shaft-centered anti-heating fan motor is disposed at a position corresponding to the bearing seat of the rotor impeller group, and the center of the shaft center is convexly disposed with an inverted axis, the shaft center The periphery of the seat has a ring wall opposite to the wall of one of the periphery of the bearing seat, and a bearing is disposed inside the bearing seat.

The technical feature of the present invention is that the oil retaining structure comprises: an oil storage tank formed in an annular concave shape on the bottom wall of the shaft seat for holding a lubricating oil; The end wall is formed by extending the bottom end of the tubular wall of the bearing seat toward the bottom wall of the shaft seat, and the oil blocking end wall is correspondingly located in the oil reservoir; and wherein the lubricating oil has a liquid level equal to or higher On the oil blocking end wall.

With this innovative and unique design, the creation can be achieved by the use of the oil-repellent end wall to generate capillary attraction to the lubricating oil contained in the oil storage tank and to intercept the lubricating oil to prevent it from being outwardly discharged. The oil-retaining function appeals, because the oil-retaining function of the creation is directly formed by the structure of the bearing housing wall and the bottom wall of the shaft seat, so that the arrangement of the components such as the oil-blocking ring body and the labyrinth ring can be omitted. The oil-retaining structure of the heart-reverse cooling fan motor achieves the practical progress of reducing the components, reducing the manufacturing cost and the defect rate, and achieving the better oil retention effect.

10‧‧‧Axis reverse heat sink fan motor

11‧‧‧ shaft seat

115‧‧‧Reverse shaft

12‧‧‧Circle

125‧‧‧ annular groove

20‧‧‧Rotor Impeller Group

21‧‧‧ bearing housing

22‧‧‧

23‧‧‧ Bearing

A‧‧‧ oil retention structure

30‧‧‧ oil storage tank

40‧‧‧Lubricating oil

41‧‧‧Liquid height

50‧‧‧ oil barrier end wall

60‧‧‧Retracted anti-off part

61‧‧‧ wall edge thinning section

62‧‧‧Restriction Limitation Department

70‧‧‧Flexible ring

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing the overall structure of a preferred embodiment of the present invention.

Figure 2 is a partial enlarged view of Fig. 1.

Fig. 3 is a perspective view showing the exploded state of the rotor group and the stator group of the present invention.

Fig. 4 is a view showing another embodiment of the structural form of the present creation.

Please refer to Figures 1 to 6 for a preferred embodiment of the oil retaining structure of the present axially-disposed cooling fan motor. However, these embodiments are for illustrative purposes only and are not subject to this structure in patent applications. The limit. The oil-retaining structure A is disposed at a position corresponding to the bearing housing 21 of the rotor impeller group 20, and the axial center 11 of the shaft-reverse heat-dissipating fan motor 10 is disposed at a position corresponding to the bearing housing 21 of the rotor impeller group 20. The oil-retaining structure A has a ring wall 12 spaced apart from a cylindrical wall 22 of the bearing housing 21, and a bearing 23 is disposed inside the bearing housing 21; the oil retaining structure A comprises the following components: An oil reservoir 30 is formed on the bottom wall 13 of the shaft seat 11 in an annular recessed shape for holding a lubricating oil 40; an oil-resistant end wall 50, which is formed by the bottom wall 22 of the bearing housing 21 The end portion of the lubricating oil 40 is correspondingly located in the oil sump 30; and the oil level 41 of the lubricating oil 40 is equal to or higher than the oil blocking end. Wall 50.

With the above structural design, the oil-repellent end wall 50 can be used to generate capillary attraction to the lubricating oil 40 contained in the oil storage tank 30 (as shown in the portion B of FIG. 2), and to intercept the lubricating oil to prevent it from being turned toward The role of external sputum can achieve the functional appeal of oil retention. Specifically, the rotor impeller group 20 of the present axially-inverted cooling fan motor 10 is also operated as in the first As shown in Fig. 2, the lubricating oil 40 contained in the oil sump 30 will flow up along the pivotal surface between the inverted shaft 115 and the bearing 23 due to capillary action (as indicated by the arrow L1). At the top end of the bearing 23, then, the lubricating oil 40 at the top end of the bearing 23 will overflow to the outside and flow back along the gap between the cylinder wall 22 of the bearing housing 21 and the outside of the bearing 23 (as indicated by arrow L2), and then When the lubricating oil 40 is returned downward to the oil blocking end wall 50, since the liquid level 41 of the lubricating oil 40 in the oil storage tank 30 is equal to or higher than the oil blocking end wall 50, the oil blocking end wall 50 and the lubricating oil 40 liquid There is a capillary attraction between the faces (as shown in the B portion of Fig. 2), so that the downwardly flowing lubricating oil 40 can be returned to the oil reservoir 30 to form a circulating oil passage, and the oil resistant end wall 50 It can also play an oil retaining, oil blocking, intercepting effect and effect to prevent the lubricating oil 40 from escaping outward.

As shown in FIGS. 2 and 3, the bottom of the oil reservoir 30 may include a plurality of recesses 31 having spacer rings, and spacer ribs 32 are formed between the recesses 31. With this configuration, it is mainly possible to increase the capacity of the lubricating oil 40 by the recess 31, and the arrangement of the spacer ribs 32 can increase the stability of the state of the lubricating oil 40.

As shown in FIG. 3, the bottom end of the tubular wall 22 of the bearing housing 21 is provided with a shrink-type retaining portion 60, which includes a wall edge thinning section 61 and at least two pressing limit portions 62. The wall edge thinning section 61 is formed at the bottom end of the tubular wall 22, and has an annular thin wall shape in which the outer diameter of the wall thickness is thinner than the cylindrical wall 22; the pressing limit portion 62 is Formed on at least one opposite side of the wall edge thinning section 61 (Note: in this example, two sets of opposite sides, that is, four laterally disposed forms), the pressing limit portion 62 is passed through an external force to the wall edge The thinning section 61 is formed by inwardly deforming a portion of the bearing portion; the damper limiting portion 62 is configured to cause a shrinkage-type pressure limiting action on the bottom end of the bearing 23 accommodated inside the bearing housing 21. , so that the bearing 23 obtains the positioning anti-off effect. The shrink-type retaining portion 60 disclosed in this example can utilize the deformation of the structure of the tubular wall 22 to achieve the function and purpose of the limit bearing 23, which is generally adopted by means of assembling a fastener compared with the related conventional structure. Having the benefit of simplifying components, and In terms of the thinning angle, the overall structural height of the axially-disposed heat-dissipating fan motor is limited and cannot be increased, since the positioning of the fastening member is not required in the tubular wall 22 of the bearing housing 21 of the present invention. The limiting bearing 23 can shorten the convex elongation of the cylinder wall 22, so that the overall structural height of the axially-disposed cooling fan motor can be correspondingly reduced, thereby achieving the advantage of being more advantageous for thinning design; If the problem of thinning is not considered, since the bearing 23 can be restrained by assembling the positioning fastener in the tubular wall 22 of the bearing housing 21, the bottom end of the bearing 23 can be further extended to make the bearing 23 and the opposite shaft The pivoting area between the 115s is expanded, and the advantages of improving the rotor support strength, the running stability, and the service life thereof are achieved, and the bottom end of the bearing 23 can be approached to the bottom end of the tubular wall 22 of the bearing housing 21 (ie, the wall edge) The bottom end of the thinned section 61), thereby enhancing the capillary attraction of the lubricating oil described above.

As shown in FIG. 4, an annular inner groove 125 is further disposed at a height position inside the ring wall 12 of the shaft seat 11 for assembling an elastic ring 70, and the elastic ring 70 is used to generate An oil-blocking function located outside the cylindrical wall 22 of the bearing housing 21; this embodiment ensures that the lubricating oil 40 does not leak from the gap between the annular wall 12 of the hub seat 11 and the tubular wall 22 of the bearing housing 21, further regaining its Oil retention effect.

Efficacy description:

The "oil-retaining structure of the axial-reverse heat-dissipating fan motor" disclosed by the present invention mainly comprises the oil-reserving structure including an oil storage tank, an oil-retaining end wall, and a lubricating oil liquid level equal to or higher than an oil-resistant end wall. Innovative structure composition design, so that this creation can be used to obtain the capillary attraction effect of the lubricating oil contained in the oil storage tank against the conventional structure proposed by the prior art. Since the oil retaining function of the present invention is directly formed by the structure of the bearing housing wall and the bottom wall of the shaft seat, the arrangement of the components such as the oil-blocking ring body and the labyrinth ring can be omitted, and the shaft center is reversely dissipated. The oil-retaining structure of the fan motor achieves the practical progress of reducing the components, reducing the manufacturing cost and the defect rate, and having the better oil retention effect.

The disclosures of the above embodiments are used to specifically explain the present creation, and although the descriptions are made through specific terms, the scope of patents of the novel creation cannot be limited thereby; those skilled in the art can understand the spirit of the creation. Changes and modifications are made to the equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

10‧‧‧Axis reverse heat sink fan motor

11‧‧‧ shaft seat

115‧‧‧Reverse shaft

12‧‧‧Circle

20‧‧‧Rotor Impeller Group

21‧‧‧ bearing housing

22‧‧‧

23‧‧‧ Bearing

A‧‧‧ oil retention structure

30‧‧‧ oil storage tank

40‧‧‧Lubricating oil

41‧‧‧Liquid height

50‧‧‧ oil barrier end wall

Claims (4)

An oil-retaining structure of an axial-reverse heat-dissipating fan motor, wherein the oil-retaining structure is disposed at a position corresponding to a bearing seat of a rotor-impeller group of a shaft-centered anti-heating fan motor, wherein the shaft center The center of the seat is convexly disposed with an inverted shaft center, and a ring wall has a ring wall spaced apart from one of the circumferences of the bearing seat, and a bearing is disposed inside the bearing seat; the oil retaining structure includes: an oil storage tank Forming an annular concave shape on the bottom wall of the axial seat for holding a lubricating oil; an oil-resistant end wall extending from a bottom end of the cylindrical wall of the bearing seat toward a bottom wall of the shaft seat And the oil blocking end wall is correspondingly located in the oil storage tank; and wherein the lubricating oil has a liquid level height equal to or higher than the oil blocking end wall; thereby, the oil storage end wall is used to occupy the oil storage tank The lubricating oil produces capillary attraction and intercepts the lubricating oil to prevent it from escaping outward, and can achieve the function of retaining oil. The oil retaining structure of the axially-disclosed heat-dissipating fan motor according to claim 1, wherein the bottom of the oil sump includes a plurality of recesses of the spacer ring row, and the recesses are formed with the spacer ribs therebetween. The oil retaining structure of the axially-reverse heat-dissipating fan motor according to claim 2, wherein the bottom end of the tubular wall of the bearing housing is provided with a shrink-proof type The portion includes a wall edge thinning section and at least two pressure limiting portions, wherein the wall edge thinning section is formed at the bottom end of the cylinder wall, and the outer diameter of the wall thickness is thinner than the diameter of the cylinder wall. The annular thin-walled shape is formed on the at least one opposite side of the thin-walled portion of the wall edge, and the pressing limit portion locally applies pressure to the thinned portion of the wall edge by an external force The inward deformation is formed by the pressure limiting portion to produce a shrink-type pressure limiting action on the bottom end of the bearing placed inside the bearing housing, so that the bearing can obtain the positioning and anti-off effect. The oil-retaining structure of the axially-disclosed heat-dissipating fan motor according to claim 3, wherein a height of the inner side of the annular wall of the shaft seat further comprises an annular inner groove for assembling an elastic ring. The elastic ring is used to create an oil barrier function located outside the wall of the bearing housing.