CN2371380Y - Cooling fan with dual bearings - Google Patents

Abstract

A heat radiation fan with double bearings comprises a fan blade group and a base, wherein a rotating shaft extending vertically downwards is arranged at the bottom end of a fan blade frame body of the fan blade group, a bearing seat is arranged on the base, an upper ball bearing and a lower oil-containing bearing are arranged in the bearing seat, a spacing ring is arranged between the two bearings, a retaining ring is buckled on an annular groove of the rotating shaft, a spring is arranged between the fan blade frame body and an inner shaft sleeve of the ball bearing, the retaining ring tightly abuts against the ball bearing, the rotating shaft, the inner shaft sleeve of the ball bearing and the retaining ring can rotate simultaneously, and the axial positions of the ball bearing, the spacing ring and the oil-containing bearing are fixed by a blocking ring. The utility model can be smoothly operated under various conditions without generating noise.

Description

Cooling fan with dual bearings

The utility model relates to a cooling fan, in particular to a fan with a single ball bearing and an oil bearing.

With the vigorous development of the modern technology industry, there are more and more products with exquisite design and powerful power, but the products with powerful power will inevitably generate high temperature during use, which has formed a hidden worry when using the product. Components burn out, the product is damaged and shut down, and severe cases will cause greater damage. Therefore, most of the sophisticatedly designed products are equipped with a cooling fan to achieve the effect of heat dissipation when the product is in use.

The known fan with ball bearings and oil-impregnated bearings, as shown in Figure 1, is provided with a bearing seat 12 on a base 10, and the accommodating groove in it can be used to place the upper and lower bearings, and the upper end bearing is a The ball bearing 14, the bearing at the lower end is an oil bearing 16, and a spacer ring 18 is installed between the ball bearing 14 and the oil bearing 16 to separate the two bearings 14, 16, 22 sets of rotating shafts connected at the center of the fan blade 20 Connected to the center of the two bearings 14 , 16 , the bottom end of the rotating shaft 22 has a recessed ring 24 for a snap ring 26 to be fastened to fix the rotating shaft 22 in the base 10 .

However, once the above-mentioned fan is used upside down, as shown in Figure 2, the fan blades will move downward due to the action of gravity, so that the buckle is tightly against the oil bearing. Disturbing noise, and due to long-term improper friction, the service life of the fan is reduced. Therefore, the known fan can only be operated with the fan blades at the upper end, so as not to affect the effectiveness of the fan itself, whether it is used upside down or otherwise. All will cause improper friction between the buckle ring and the bearing, and the fan will not be able to operate effectively, resulting in noise and affecting the service life of the fan. And the rotating shaft is easy to slip in the inner shaft sleeve of the ball bearing while running at high speed, which affects the operating efficiency of the fan and generates noise.

The main purpose of this utility model is to provide a cooling fan with ball bearings and oil-impregnated bearings that can operate smoothly in various situations, so that no noise will be generated during operation, and the service life will not be shortened.

In order to achieve the above-mentioned purpose, the utility model has a cooling fan with double bearings, which includes a fan blade group and a base. The fan blade group is mainly composed of a fan blade frame and connected to the outer edge of the fan blade frame. It is composed of several fan blades, wherein, the center of the bottom end of the fan blade frame is provided with a rotating shaft extending vertically downward; the base is arranged up and down in a bearing seat and an accommodation groove set in it. The ball bearing and the oil bearing are combined, and the rotating shaft is sleeved in the two bearings; a spacer ring is installed between the ball bearing and the oil bearing to separate the two bearings, and it is characterized in that: the rotating shaft An annular groove is provided at an appropriate position, a clasp is fastened to the groove on the rotating shaft, and a spring connects the fan blade frame and the inner sleeve of the ball bearing so that the clasp is tightly against the ball bearing. The inner shaft sleeve uses the clasp and the spring to fix the ball bearing on the rotating shaft, and another retaining ring is installed on the top of the accommodating groove to fix the axial position of the ball bearing, the spacer ring and the oil bearing.

The spacer ring is formed by a rubber material. The spring is a compression spring.

After adopting the above-mentioned structure of the utility model, the cooling fan can be operated smoothly in various situations, such as upside down or sideways, and because the buckle rotates simultaneously with the inner shaft sleeve of the ball bearing, it does not produce Friction and noise, and ensure the life of the fan.

In the following, specific embodiments will be described in detail with reference to the accompanying drawings, so as to make it easier to understand the purpose, technical content, features and effects of the present invention.

A brief description of the attached drawings:

Figure 1: is a known fan cross-sectional view;

Fig. 2: is another embodiment of known fan;

Fig. 3: is the sectional view of the utility model.

As shown in FIG. 3 , it is a cross-sectional view of the present invention, which is composed of a blade set 28 and a base 30 . A fan blade group 28 includes a fan blade frame body 32, and several fan blades 34 are connected to the outer edge around the fan blade frame body 32, wherein, the center of the bottom end of the fan blade frame body 32 is provided with a vertically downwardly extending rotating The shaft 36 forms an annular groove 38 at a proper position of the rotating shaft 36 .

A base 10 is composed of a bearing housing 40 and a ball bearing 42 and an oil-impregnated bearing 44 therein. The bearing housing 40 is provided with an accommodating groove in the center for placing the upper and lower bearings. The upper bearing is It is a ball bearing 42, the lower bearing is an oil bearing 44, and a spacer ring 46 is installed between the ball bearing 42 and the oil bearing 44, which is made of rubber material to separate the ball bearing 42 and the oil bearing 44.

The rotating shaft 36 of the fan blade group 28 can be sleeved in the ball bearing 42, the spacer ring 46 and the oil bearing 44 in sequence, so that the rotating shaft 36 has good contact with the two bearings 42, 44. At this time, the rotating shaft 36 The annular groove 38 is just for a clasp 50 to fasten, and the rotating shaft 36 is fixed in the bearings 42 and 44 of the base 30 .

The blade frame 32 is connected to the inner sleeve of the ball bearing 42 by a compression spring 52, the compression spring 52 is sleeved on the outside of the rotating shaft 36, so that the above-mentioned buckle 50 is tightly pressed against the inner sleeve of the ball bearing 42, The inner sleeve of the ball bearing 42 is fixed on the rotating shaft 36 by the snap ring 50 and the compression spring 52, so the ball bearing 42 does not move up and down. Another retaining ring 48 is installed on the top of the receiving tank to fix the axial positions of the ball bearing 42, the spacer ring 46 and the oil bearing 44 so as not to move up and down. And by the power provided by the base 30, the rotating shaft 36 drives the fan blades 34 to rotate, thereby achieving the purpose of heat dissipation. With the high-speed rotation of the rotating shaft 36, there is no slipping phenomenon, so it will not produce undue friction and noise with the ball bearing 42, which is the main feature of the utility model.

Another feature of the utility model is that the axial position of the ball bearing, the spacer ring and the oil bearing in the accommodating tank is fixed by the stop ring so that it cannot move up and down, and the compression spring and the buckle ring fix the ball bearing on the rotating shaft It does not move up and down, so that the cooling fan can run smoothly in various situations, such as upside down or sideways, and because the buckle rotates with the inner shaft sleeve of the ball bearing at the same time, it does not generate friction and noise, and Ensure the life of the fan.

The above-mentioned embodiments are only to illustrate the technical content and characteristics of the present utility model, and its purpose is to enable those who are familiar with cooling fans to understand the content of the present utility model and implement it accordingly, and should not limit the scope of implementation of the present utility model. , that is, all equivalent changes or modifications made according to the structural features disclosed in the technical solution of the utility model should still be covered within the scope of the technical solution of the utility model.

Claims (3)

1, a kind of radiation fan with duplex bearing, comprise a flabellum group and a pedestal, this flabellum group mainly is made up of a flabellum framework and several fan blade of being connected to this flabellum framework outer rim, and wherein, the centre of this flabellum framework bottom is provided with a running shaft that extends vertically downward; This pedestal is combined by the ball bearing and the oil-impregnated bearing that are arranged above and below in a bearing support and the interior set containing groove thereof, and this rotary sleeve is connected in this two bearing; Be equiped with a spacer ring between this ball bearing and this oil-impregnated bearing and separate this two bearing, it is characterized in that: the appropriate position on this running shaft is provided with an annular groove, one clasp snaps onto this groove on this running shaft, one spring connects the internal axle sleeve of this flabellum framework and ball bearing, make this clasp be tight against the internal axle sleeve of this ball bearing, utilize this clasp and this ball bearing of this spring handle to be fixed on this running shaft, other has a baffle ring to be installed in the top of containing groove, fixes the axial position of this ball bearing, spacer ring and oil-impregnated bearing.

2, radiation fan as claimed in claim 1 is characterized in that: this spacer ring is formed by a rubber material.

3, radiation fan as claimed in claim 1 is characterized in that: this spring is a pressure spring.

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