Fan bearing fixing anti-sliding structure

Abstract

The utility model provides a fan bearing fixing anti-sliding structure. The fan bearing fixing anti-sliding structure comprises a fan frame, a shaft core, two bearings and a first spring. A base provided with a bearing sleeve in a protruding mode is arranged on the air outlet side of the fan frame. The shaft core is arranged in the bearing sleeve; the two bearings are respectively mounted in the bearing sleeves and arranged on the shaft core, and each bearing comprises an inner ring matched with the shaft core and an outer ring matched with the corresponding bearing sleeve; the first spring is arranged on the shaft core in a sleeved mode and located between the inner rings of the two bearings, axial force for elastic supporting is generated between the two inner rings, the two inner rings are fixed to the preset positions, and therefore radial relative sliding between the inner rings of the two bearings and the shaft core is limited, the stability of the two bearings is improved, and the service life of the two bearings is prolonged.

Description

Technical Field

[0001] This utility model relates to a bearing fixing structure, and more particularly to a fan bearing fixing anti-slip structure. Background Technology

[0002] like Figure 1 The fan bearing structure shown includes a fan blade 11, a base bracket 12, two bearings 13 and 14, and upper and lower springs 151 and 152. The fan blade 11 has a rotating shaft 111, and the base bracket 12 has a bearing sleeve 121. The two bearings 13 and 14 are respectively installed inside the bearing sleeve 121. The rotating shaft 111 cooperates with the two bearings 13 and 14. A baffle 122 is provided inside the bearing sleeve 121, with the two bearings 13 and 14 positioned above and below the baffle 122. The upper and lower springs 151 and 152 are respectively positioned between the baffle 122 and the two bearings 13 and 14, applying pressure to the outer rings of the bearings 13 and 14 to ensure smooth and balanced force distribution on the outer ring track during operation. This double-spring design allows the balls inside the bearings 13 and 14 to rotate smoothly, reducing ball friction noise at low fan speeds. Meanwhile, during installation and transportation, springs 151 and 152 provide effective buffer protection for bearings 13 and 14, reducing bearing damage caused by external impact.

[0003] However, this structure primarily focuses on the stability of the outer rings of bearings 13 and 14, failing to adequately address the radial slippage problem between the inner ring of the bearing and the rotating shaft 111 during high-speed operation. Therefore, under high-speed operating conditions, there remains a risk of premature bearing failure due to radial slippage.

[0004] Furthermore, the bearing assembly within current fans may employ one of the following two methods:

[0005] 1. Clearance Fit Fixing: This method uses a clearance fit between the bearing inner ring and the rotating shaft, as well as the outer ring and the bearing sleeve. While this assembly method is simple, efficient, and low-cost, the clearance fit between the bearing inner ring and the rotating shaft, and between the bearing outer ring and the bearing sleeve, means that as the fan speed increases, the centrifugal force generated by the high-speed operation of the fan blades becomes insufficient to overcome radial slippage. After prolonged operation, the bearing is prone to wear and failure, shortening the fan's lifespan.

[0006] 2. Interference fit and glue fixing: This way uses the interference fit between the bearing inner ring and the rotating shaft core, and the glue fixing between the bearing outer ring and the bearing sleeve. However, the assembly process is complex, precise size control and accurate control of glue amount are required, resulting in low assembly efficiency and significantly increased manufacturing cost. In addition, when the fan is impacted by external force, micro cracks are easily generated at the glue joint, resulting in loss of pre-pressure in the bearing interior. At this time, the balls cannot be kept on the predetermined raceway between the inner ring and the outer ring, causing micro-motion wear, and eventually leading to premature failure of the bearing.

[0007] Therefore, the above two assemblies have obvious deficiencies in high-speed running stability and cost control: (1) The bearing is assembled in a clearance fit manner, which cannot effectively resist radial sliding under high speed. (2) The bearing is assembled in an interference fit and glue fixing manner, which has high assembly cost and is still prone to failure under external force. Therefore, the existing technology cannot simultaneously meet the needs of fan high-speed stability, simple assembly and cost control.

[0008] Therefore, how to solve the above-mentioned problems and deficiencies of the prior art is the research and improvement direction of the designers and related manufacturers in this industry. Content of the utility model

[0009] The utility model aims at providing a fan bearing fixing anti-sliding structure which can solve the above-mentioned problems.

[0010] The utility model provides a fan bearing fixing anti-sliding structure, characterized by comprising:

[0011] A fan frame has a base, and the base is provided with a bearing sleeve protruding;

[0012] A shaft core has a connecting end and a free end, the connecting end is connected to a fan wheel, and the free end extends into the bearing sleeve;

[0013] A first bearing and a second bearing are located in the bearing sleeve and arranged on the shaft core, the first bearing and the second bearing comprise an inner ring, an outer ring and a plurality of rolling elements arranged between the inner ring and the outer ring, the outer ring is matched with the bearing sleeve, and the inner ring is matched with the shaft core;

[0014] A first spring is sleeved on the shaft core and located between the first bearing and the second bearing, two ends of the first spring respectively abut against the inner rings of the first bearing and the second bearing to form an elastic supporting axial force between the inner rings of the first bearing and the second bearing, so that the inner rings of the first bearing and the second bearing are stably fixed at a predetermined position and the radial relative sliding between the inner rings of the first bearing and the second bearing and the shaft core is limited during high-speed operation of the fan.

[0015] The fan bearing fixed anti-sliding structure, wherein the bearing sleeve has an upper abutting portion and a lower abutting portion, and the first bearing and the second bearing are arranged in the upper abutting portion and the lower abutting portion respectively.

[0016] The fan bearing fixed anti-sliding structure, wherein a second spring is arranged between the outer ring of the second bearing and the lower abutting portion, and one end of the second spring abuts against the lower abutting portion and the other end abuts against the outer ring of the second bearing.

[0017] The fan bearing fixed anti-sliding structure, wherein the shaft core has a neck portion adjacent to the free end, and the neck portion is buckled by a buckle ring, and the buckle ring abuts against the inner ring of the second bearing from the other side of the second bearing.

[0018] The fan bearing fixed anti-sliding structure, wherein the outer ring of the first bearing abuts against the upper abutting portion.

[0019] Thus, the stability of the first bearing and the second bearing can be effectively improved, and the service life thereof can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the prior art;

[0021] Figure 2 is a sectional exploded view of the utility model;

[0022] Figure 3 is a local sectional view of the utility model;

[0023] Figure 4 is a local enlarged view of Figure 3 ; is a local enlarged view of

[0024] Figure 5 is a local enlarged view of Figure 3 .

[0025] Reference Signs List: 21 fan frame; 211 base; 212 bearing sleeve; 213 upper abutting portion; 214 lower abutting portion; 22 shaft core; 221 connecting end; 222 free end; 223 neck portion; 23 first bearing; 231 inner ring; 232 outer ring; 233 rolling element; 24 second bearing; 241 inner ring; 242 outer ring; 243 rolling element; 25 first spring; 26 buckle ring; 27 fan wheel; 28 stator; 29 second spring. DETAILED DESCRIPTION

[0026] The above-mentioned objects, structural and functional characteristics of the utility model will be described according to the preferred embodiments of the accompanying drawings.

[0027] Please refer to the accompanying drawings, Figure 2 is a sectional exploded view of the utility model; Figure 3The partial sectional view combined schematic view of the utility model; Figure 4 For Figure 3 The partial enlarged view of Figure 5 For Figure 3 The partial enlarged view of.

[0028] As shown in the figure, the utility model provides a fan bearing fixed anti-sliding structure, including a fan frame 21, a shaft core 22, a first bearing 23 and a second bearing 24 and a first spring 25.

[0029] Fan frame 21 has an air inlet side and an air outlet side, and is provided with a base 211 on the air outlet side, and the base 211 is upwardly protruding to form a hollow bearing sleeve 212. The outer side of bearing sleeve 212 is provided with a stator 28, and the stator 28 is installed around the bearing sleeve 212. The inside of bearing sleeve 212 is provided with an upper abutting part 213 and a lower abutting part 214, which are located at the upper end and the lower end of bearing sleeve 212 respectively, and are arranged in a stepped form on the inner wall to provide positioning support for the bearing.

[0030] The shaft core 22 includes a connecting end 221 and a free end 222. The connecting end 221 is used for fixing the fan wheel 27, and the free end 222 extends into the inside of the bearing sleeve 212, and a neck part 223 is arranged adjacent to the free end 222 for further installation of other elements.

[0031] The first bearing 23 and the second bearing 24 are installed in the bearing sleeve 212 and are arranged at the upper abutting part 213 and the lower abutting part 214 respectively. The first bearing 23 and the second bearing 24 each include an inner ring 231, 241, an outer ring 232, 242 and a plurality of rolling elements 233, 243 arranged between the inner ring 231, 241 and the outer ring 232, 242. The inner ring 231, 241 and the outer ring 232, 242 rotate relative to each other through the rolling elements 233, 243. The outer ring 232, 242 is matched with the inner side of the bearing sleeve 212 (for example, the outer diameter of the outer ring 232, 242 matches the inner diameter of the bearing sleeve 212). The inner ring 231, 241 is matched with the outer surface of the shaft core 22 and is arranged on the shaft core (for example, the inner diameter of the inner ring 231, 241 matches the outer diameter of the shaft core 22), so that the first and second bearings 23, 24 can stably support the rotation of the shaft core 22 and the fan wheel 27.

[0032] The outer ring 232 of the first bearing 23 abuts against the upper abutting part 213, and the first spring 25 is sleeved on the shaft core 22 and located between the inner ring 231 of the first bearing 23 and the inner ring 241 of the second bearing 24. The two ends of the first spring 25 are tightly abutted against the inner ring 231 of the first bearing 23 and the inner ring 241 of the second bearing 24 respectively, to provide elastic support and positioning effect.

[0033] In addition, a second spring 29 is arranged between the outer ring 242 of the second bearing 24 and the lower abutting portion 214. One end of the second spring 29 abuts against the lower abutting portion 214, and the other end contacts the outer ring 242 of the second bearing 24. The free end 222 of the shaft core 22 penetrates through the inner ring 241 of the second bearing 24 and extends downward. The neck portion 223 of the free end 222 is buckled with a clasp 26, which is tightly pressed against the inner ring 241 from the lower side of the second bearing 24, thereby limiting the second bearing 24 and the second spring 29, and avoiding the second bearing 24 and the second spring 29 from being separated from the shaft core 22 and the bearing sleeve 212.

[0034] Through the above arrangement, the pre-pressing force generated by the first spring 25 forms an elastic supporting axial force between the inner ring 231 of the first bearing 23 and the inner ring 241 of the second bearing 24, so as to stably fix the two inner rings 231 and 241 at the predetermined positions, thereby limiting the radial relative sliding between the inner rings 231 and 241 and the shaft core 22 when the fan wheel 27 is running at high speed. The structure not only improves the stability of the first bearing 23 and the second bearing 24, but also prolongs the service life of the first bearing 23 and the second bearing 24.

[0035] The above has made a detailed description of the utility model, and the above is only a preferred embodiment of the utility model, and the utility model should not be limited by the above. That is, any equivalent changes and modifications made according to the utility model should still belong to the patent coverage range of the utility model.

Claims

1. A fan bearing fixing anti-sliding structure characterized by comprising: Comprising: a fan frame having a base with a protruding bearing sleeve; a shaft core having a connecting end connected to a fan wheel and a free end extending into the bearing sleeve; a first bearing and a second bearing located in the bearing sleeve and disposed on the shaft core, the first bearing and the second bearing comprising an inner ring and an outer ring and a plurality of rolling elements disposed between the inner ring and the outer ring, the outer ring being matched with the bearing sleeve, and the inner ring being matched with the shaft core; a first spring sleeved on the shaft core and located between the first bearing and the second bearing, two ends of the first spring respectively abutting against the inner rings of the first bearing and the second bearing to form an elastic supporting axial force between the inner rings of the first bearing and the second bearing, so that the inner rings of the first bearing and the second bearing are stably fixed at a predetermined position, and the radial relative sliding between the inner rings of the first bearing and the second bearing and the shaft core in high-speed operation of the fan is limited.

2. The fan bearing fixation anti-sliding structure according to claim 1, wherein: The bearing sleeve has an upper abutting portion and a lower abutting portion, and the first bearing and the second bearing are respectively disposed in the upper abutting portion and the lower abutting portion.

3. The fan bearing fixation anti-sliding structure according to claim 2, wherein: A second spring is provided between the outer ring of the second bearing and the lower abutting portion, one end of the second spring abutting against the lower abutting portion, and the other end abutting against the outer ring of the second bearing.

4. The fan bearing fixation anti-sliding structure according to claim 3, wherein: The shaft core has a neck portion adjacent to the free end, and the neck portion is buckled by a buckle ring, the buckle ring abutting against the inner ring of the second bearing from the other side of the second bearing.

5. The fan bearing fixation anti-sliding structure according to claim 2, wherein: The outer ring of the first bearing abuts against the upper abutting portion.

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