Rotating shaft assembly and fan using same

Abstract

The utility model discloses a rotating shaft assembly and a fan using the same, comprising: a bearing body, a through hole penetrating along the axial direction is arranged in the bearing body, and the hole wall of the through hole is provided with a first spiral groove extending along the axial direction of the through hole; a second spiral groove extending in the axial direction of the rotating shaft is formed in the outer surface of the part, used for being in clearance fit with the through hole, of the rotating shaft; the first spiral groove and the second spiral groove are suitable for being matched in a staggered mode, and the rotation direction of the first spiral groove is opposite to that of the second spiral groove. According to the rotating shaft assembly, friction between the rotating shaft and the bearing body in the operation process can be reduced, so that operation noise is reduced, and the service life of the fan adopting the rotating shaft assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a rotating shaft assembly and a fan using the same. Background Art

[0002] At present, most of the bearings of fans use oil-impregnated bearings for cost considerations. Such fans are prone to oil slinging and oil leakage during long-term continuous operation. The reduction of lubricating grease will increase the power consumption and noise of the fan, and shorten the service life of the fan.

[0003] In this regard, a general method is to add an oil storage groove to the inner hole wall where the bearing is fitted with the motor rotating shaft, so that the inner hole wall of the bearing can store oil, improving the lubrication effect between the bearing and the motor rotating shaft. For example, a hydrodynamic bearing, a bearing assembly and a high-speed motor disclosed in the patent with the publication number CN220726895U include a through hole penetrating through the center of the bearing body, and an oil storage groove is arranged in the middle part of the through hole. The rotating shaft is lifted by several high oil pressures in the through hole, so that the rotating shaft and the hydrodynamic bearing rotate at high speed non-contact through the action of lubricating oil, without mechanical part contact friction, thus making the noise of the high-speed motor smaller, and the wear of the components smaller, so that the high-speed motor has a longer service life, effectively solving the problems of large noise and short service life when the existing high-speed motor rotates.

[0004] Based on the situation of designing an oil storage groove in the inner hole of the bearing, although the mating surface with the motor rotating shaft can be lubricated to a certain extent by storing oil, in this case, although the design of the anti-oil leakage groove can prevent the oil in the oil storage groove from being slung out to a certain extent, its overall anti-oil leakage effect is still poor. The existence of oil leakage may, on the one hand, cause the lubrication effect to decrease due to the leakage of lubricating oil after the long-term cooperation of the motor shaft and the bearing, and at the same time, the leaked lubricating oil may also contaminate other components.

[0005] Therefore, for the mating method of the oil-impregnated bearing and the rotating shaft of the motor used in the prior art, in terms of reducing the leakage problem of lubricating oil, its structure needs to be further optimized. Summary of the Utility Model

[0006] The first object of the utility model is to provide a rotating shaft assembly to solve the technical problem of balancing the lubrication effect between the bearing and the rotating shaft and reducing the leakage problem of lubricating oil.

[0007] The second object of the utility model is to provide a fan to solve the technical problem of balancing the lubrication effect between the bearing and the rotating shaft and reducing the leakage problem of lubricating oil.

[0008] The rotating shaft assembly of the utility model is realized as follows:

[0009] A rotating shaft assembly includes:

[0010] A bearing body is provided with a through hole penetrating axially therein, and a first helical groove extending axially is provided on the hole wall of the through hole.

[0011] A rotating shaft is provided with a second helical groove extending axially on the outer surface of the part for clearance fit with the through hole; wherein

[0012] The first helical groove and the second helical groove are adapted to be staggered and mated, and the helix directions of the first helical groove and the second helical groove are opposite.

[0013] In an optional embodiment of the present utility model, the bearing body includes an inner bearing provided with a through hole and an outer bearing located outside the inner bearing; wherein

[0014] The axial length of the outer bearing is greater than the axial length of the inner bearing; and

[0015] Both axial ends of the outer bearing protrude beyond both axial ends of the inner bearing, so that a concave oil storage cavity is formed between the shaft ends of the outer bearing and the shaft ends of the inner bearing.

[0016] In an optional embodiment of the present utility model, the inner bearing and the outer bearing are integrally processed and formed.

[0017] In an optional embodiment of the present utility model, at least one axial outer groove extending axially along the outer surface of the outer bearing is provided.

[0018] In an optional embodiment of the present utility model, at least one radial outer groove extending radially and in one-to-one communication with the outer groove is provided at one of the shaft side ends of the outer bearing.

[0019] In an optional embodiment of the present utility model, the outer bearing includes a first shaft member and a second shaft member integrally formed and arranged axially in sequence;

[0020] The first shaft member is cylindrical, and the second shaft member is frustum-shaped; and the axial length of the first shaft member is greater than the axial length of the second shaft member; and

[0021] The radial outer groove is provided on the first shaft member, and the axial outer groove extends only along the axial direction of the first shaft member, or the axial outer groove extends along the axial directions of both the first shaft member and the second shaft member.

[0022] In an optional embodiment of the present utility model, at least one radial inner groove extending radially is provided at each of the two shaft side ends of the inner bearing.

[0023] The fan of the present utility model is realized as follows:

[0024] A blower, comprising: the rotation shaft assembly, a support frame cooperating with the bearing body, and a blade connected to the rotation shaft; wherein

[0025] An assembly cavity for accommodating the bearing body is provided in the support frame.

[0026] In an alternative embodiment of the present utility model, an installation portion for mating with the blade is further provided on the rotation shaft; and an annular limiting groove is provided between the installation portion and the portion of the rotation shaft for clearance fit with the through hole.

[0027] In an alternative embodiment of the present utility model, the blower further comprises a motor assembly cooperating with the rotation shaft;

[0028] An annular boss is provided at the axis of the stator frame of the motor assembly, and a counterbore adapted to be embedded in the assembly cavity is provided in the annular boss; a shaft hole adapted to mate with the rotation shaft is provided in the counterbore;

[0029] A cross-shaped card slot communicating with the shaft hole is provided on the circumferential side of the shaft hole, and the cross-shaped card slot is adapted to be deformed to be clamped into the annular limiting groove.

[0030] In an alternative embodiment of the present utility model, a lubricating oil buffer cavity is formed between the assembly cavity and the counterbore of the stator frame.

[0031] By adopting the above technical solutions, the present utility model has the following beneficial effects: For the rotation shaft assembly of the present utility model and the blower using the same, a storage effect for lubricating oil is formed by providing a second spiral groove on the rotation shaft and a first spiral groove in the through hole of the bearing body, thereby reducing the friction during the operation between the rotation shaft and the bearing body, reducing the operation noise, and thus prolonging the service life of the blower using the rotation shaft assembly. On this basis, by designing a structure in which the spiral directions of the first spiral groove and the second spiral groove are opposite, an interleaved structure is formed between the rotation shaft and the bearing body, so that when the rotation pressure of the lubricating oil is opposite, the probability of the lubricating oil being thrown out is reduced. In addition, for the blower using the rotation shaft assembly, a buffer for the lubricating oil is formed by the cooperation of the stator frame and the assembly cavity of the support frame, so that even the lubricating oil leaking from the interleaved structure between the bearing body and the rotation shaft can be temporarily stored in the lubricating oil buffer cavity, preventing it from directly overflowing onto the blade of the blower. Description of the Drawings

[0032] Figure 1 Is a three-dimensional structural schematic diagram of the bearing body of the rotation shaft assembly of the present utility model;

[0033] Figure 2 Is a structural schematic diagram of the rotation shaft of the rotation shaft assembly of the present utility model;

[0034] Figure 3Schematic cross-sectional structure diagram of the bearing body of the rotating shaft assembly of the present utility model;

[0035] Figure 4 Schematic structure diagram of the rotating shaft assembly of the present utility model applied in a fan;

[0036] Figure 5 Schematic structure diagram of the cooperation between the stator skeleton and the rotating shaft of the rotating shaft assembly of the present utility model applied in a fan;

[0037] Figure 6 Schematic partial exploded structure diagram of the fan of the present utility model;

[0038] Figure 7 Schematic first perspective structure diagram of the stator skeleton of the fan of the present utility model;

[0039] Figure 8 Schematic second perspective structure diagram of the stator skeleton of the fan of the present utility model.

[0040] In the figure: rotating shaft 1, second spiral groove 11, annular limiting groove 12, mounting portion 13, outer bearing 2, axial outer groove 21, radial outer groove 22, first shaft member 23, second shaft member 24, inner bearing 3, radial inner groove 31, first spiral groove 32, wind blade 4, support portion 51, support column 52, assembly cavity 53, stator skeleton 6, annular boss 7, counterbore 8, shaft hole 81, cross-shaped card slot 82, lubricating oil buffer cavity 9, magnetic ring assembly 101, stator structure 102. Detailed implementation manners

[0041] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments and in conjunction with the accompanying drawings.

[0042] Embodiment 1:

[0043] Please refer to Figures 1 to 5 As shown, this embodiment provides a rotating shaft assembly, including: a bearing body and a rotating shaft 1 used in cooperation. A through hole penetrating axially is provided in the bearing body, and this through hole is used to form a clearance fit with the rotating shaft 1.

[0044] Furthermore, a first spiral groove 32 extending along its axial direction is provided on the hole wall of the through hole; and a second spiral groove 11 extending along the axial direction of the rotating shaft 1 is provided on the outer surface of the part of the rotating shaft 1 for clearance fit with the through hole. The first spiral groove 32 and the second spiral groove 11 are adapted to be staggered and matched to form an effect of storing lubricating oil, thereby reducing the friction during the operation between the rotating shaft 1 and the bearing body and thus reducing the operation noise.

[0045] Based on the above situation, furthermore, the spiral direction of the first spiral groove 32 is opposite to that of the second spiral groove 11, so that an interleaved structure is formed between the rotating shaft 1 and the bearing body, reducing the probability of the lubricating oil being thrown out under the condition of opposite rotating pressure.

[0046] In addition, regarding the bearing body of this embodiment, it should be further noted that the bearing body includes an inner bearing 3 provided with a through hole and an outer bearing 2 located outside the inner bearing 3; in a preferred embodiment, the inner bearing 3 and the outer bearing 2 are integrally processed.

[0047] On the basis of the above structure, furthermore, the axial length of the outer bearing 2 is greater than that of the inner bearing 3; and both axial ends of the outer bearing 2 protrude from both axial ends of the inner bearing 3, so that a concave oil storage cavity is formed between the axial ends of the outer bearing 2 and the axial ends of the inner bearing 3.

[0048] In addition, for the outer bearing 2:

[0049] First of all, in terms of structure, the outer bearing 2 includes a first shaft member 23 and a second shaft member 24 which are integrally formed and arranged in sequence along the axial direction; the first shaft member 23 is cylindrical, and the second shaft member 24 is frustum-shaped; and the axial length of the first shaft member 23 is greater than that of the second shaft member 24.

[0050] Furthermore, at least one axially extending outer axial groove 21 is provided on the outer surface of the outer bearing 2. It should be noted that the axially outer groove 21 here can extend only along the axial direction of the first shaft member 23, or the axially outer groove 21 can extend along the axial directions of both the first shaft member 23 and the second shaft member 24 at the same time. Both of these situations meet the usage requirements of this embodiment, and this embodiment does not make an absolute limitation in this regard. Taking an optional embodiment as an example with reference to the accompanying drawings, 6 to 12 axially outer grooves 21 are provided on the outer surface of the bearing, and these axially outer grooves 21 can be evenly arranged along the circumferential direction.

[0051] And, at least one radially extending radial outer groove 22 that communicates with the outer groove one-to-one is provided at one of the axial ends of the outer bearing 2. The radially outer groove 22 here is provided on the first shaft member 23. It should be noted here that regarding the radially outer groove 22, its quantity can be exactly the same as the quantity of the bearing outer groove to form a one-to-one matching situation. Of course, in another possible situation, the quantity of the radially outer groove 22 is more than that of the bearing outer groove, that is to say, in addition to satisfying the one-to-one matching with the axially outer groove 21, there can be extra radially outer grooves 22. The above situations all meet the usage requirements of this embodiment.

[0052] Based on the above situation, further, at least one radially extending inner radial groove 31 is provided at each of the two axial ends of the inner bearing 3. Preferably, the number of the inner radial grooves 31 here is not less than the number of the outer radial grooves 22. Based on this situation, an oil passage channel suitable for the circulation of lubricating oil is formed among the first spiral groove 32, the inner radial groove 31, the outer radial groove 22, and the axial outer groove 21.

[0053] In summary, for the rotating shaft assembly of this embodiment, it can not only achieve the lubricating fit effect between the rotating shaft 1 and the bearing body, but also reduce the risk of the lubricating oil being thrown out from the mating surface between the rotating shaft 1 and the bearing body.

[0054] Embodiment 2:

[0055] Please refer to Figures 1 to 8 As shown, based on the rotating shaft assembly of Embodiment 1, this embodiment provides a fan, including: the rotating shaft assembly of Embodiment 1, a support skeleton that cooperates with the bearing body, and a wind blade 4 that is connected to the rotating shaft 1; wherein an assembly cavity 53 for accommodating the bearing body is provided in the support skeleton. Regarding the fan of this embodiment, it also includes, for example but not limited to, a magnetic ring assembly 101 that is maturely used in the prior art.

[0056] Taking the attached drawings as an example, the support skeleton includes a disc-shaped support portion 51 and a protruding support column 52 provided on the support portion 51, and the assembly cavity 53 is formed inside the support column 52.

[0057] Furthermore, an installation portion 13 for mating with the wind blade 4 is also provided on the rotating shaft 1; and an annular limiting groove 12 is provided between the installation portion 13 and the portion of the rotating shaft 1 that is used for clearance fit with the through hole. Here, the installation portion 13 and the wind blade 4 can be selected to be in an interference fit manner.

[0058] In addition, it should be further noted that the fan adopted in this embodiment also includes a motor assembly that cooperates with the rotating shaft 1. An annular boss 7 is provided at the center of the stator skeleton 6 of the stator structure 102 adopted in the motor assembly here, and a counterbore 8 suitable for being embedded into the assembly cavity 53 is provided in the annular boss 7; a shaft hole 81 suitable for mating with the rotating shaft 1 is provided in the counterbore 8.

[0059] In order to enable the stator skeleton 6 to cooperate with the rotating shaft 1, a cross-shaped card slot 82 communicating with the shaft hole 81 is provided on the circumferential side of the shaft hole 81, and the cross-shaped card slot 82 is adapted to deform and be clamped into the annular limiting groove 12. This structure, through the cooperation between the stator skeleton 6 and the rotating shaft 1, replaces the traditional way of adding a separate card to fix the impeller and adding an oil-proof gasket in a blower, which can greatly simplify the assembly procedure. The outer diameter of the annular limiting groove 12 is larger than the inner diameter of the shaft hole 81, but smaller than the circumferential inner diameter of the cross-shaped card slot 82. However, the outer diameter of the part of the rotating shaft 1 that is not the annular limiting groove 12 is larger than the circumferential inner diameter of the cross-shaped card slot 82. After the rotating shaft 1 passes through the stator skeleton 6, the cross-shaped card slot 82 is deformed into an inverted state, so as to form a lubricating oil buffer cavity 9 between the sunk platform 8 of the stator skeleton 6 and the assembly cavity 53. In this structure, even if the lubricating oil leaking from the staggered structure between the bearing body and the rotating shaft 1 can be temporarily stored in the lubricating oil buffer cavity 9, preventing it from directly overflowing onto the blower blade 4. The cooperation between the sunk platform 8 and the assembly cavity 53 here can, firstly, prevent the stator structure from falling off the support skeleton, and secondly, effectively prevent the leakage of lubricating oil.

[0060] It should be noted that the design of the axial outer groove 21 on the outer bearing 2 enables the lubricating oil in the through hole of the inner bearing 3 to form an oil body loop after being thrown onto the inner wall of the assembly cavity 53 of the support skeleton, and can eliminate the air pressure generated when the bearing body is pressed into the assembly cavity 53, which is beneficial to the smooth progress of the assembly operation of the blower blade 4.

[0061] In summary, for the blower of this embodiment, under the action of centrifugal force, the lubricating oil will rotate with the blower blade 4 and be thrown outwards from the rotating shaft 1. The thrown lubricating oil will flow along the inner wall of the lubricating oil buffer cavity 9 and into the radial inner groove 22, then flow into the first spiral groove 32 on the through hole of the inner bearing 3 and the second spiral groove 11 on the rotating shaft 1 to form an interlaced oil storage structure, reducing the leakage of the lubricating oil in the through hole of the inner bearing 3 and forming an oil body circulation loop with the axial outer groove 21 of the outer bearing 2. In this structure, not only can the running noise be reduced, its service life be extended, and the higher running speed requirements of the blower be supported, but also the risk of the lubricating oil used in the rotating shaft assembly overflowing onto the blade 4 can be reduced.

[0062] In the above specific embodiments, the purpose, technical solution and beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0063] In the description of the present utility model, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0064] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0065] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0066] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0067] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

Claims

1. A rotating shaft assembly, characterized in that, Comprising: A bearing body, in which there is a through hole penetrating axially, and on the hole wall of the through hole, there is a first spiral groove extending along its axial direction; A rotating shaft, on the outer surface of the part of the rotating shaft for clearance fit with the through hole, there is a second spiral groove extending along the axial direction of the rotating shaft; wherein The first spiral groove and the second spiral groove are adapted to be staggeredly fitted, and the spiral directions of the first spiral groove and the second spiral groove are opposite.

2. The rotating shaft assembly according to claim 1, wherein The bearing body includes an inner bearing with a through hole and an outer bearing located outside the inner bearing; wherein The axial length of the outer bearing is greater than that of the inner bearing; and Both axial ends of the outer bearing protrude beyond the axial ends of the inner bearing, so that a recessed oil storage cavity is formed between the axial ends of the outer bearing and the axial ends of the inner bearing.

3. The rotating shaft assembly according to claim 2, characterized in that, The inner bearing and the outer bearing are integrally processed and formed.

4. The rotating shaft assembly according to claim 2 or 3, characterized in that, On the outer surface of the outer bearing, there is at least one axial outer groove extending along the axial direction of the outer bearing.

5. The shaft assembly according to claim 4, characterized in that, On one of the axial side ends of the outer bearing, there is at least one radial outer groove extending radially and communicating with the outer groove one by one.

6. The shaft assembly according to claim 5, wherein The outer bearing includes a first shaft member and a second shaft member integrally formed and arranged axially in sequence; The first shaft member is cylindrical, and the second shaft member is frustum-shaped; and the axial length of the first shaft member is greater than that of the second shaft member; and The radial outer groove is arranged on the first shaft member, and the axial outer groove only extends along the axial direction of the first shaft member, or the axial outer groove extends along the axial directions of both the first shaft member and the second shaft member.

7. The rotating shaft assembly according to claim 5, characterized in that On both axial side ends of the inner bearing, there are at least one radial inner groove extending radially.

8. A fan, characterized in that, Comprising: A rotating shaft assembly as described in any one of claims 1 to 7, a support skeleton cooperating with the bearing body, and a wind blade connected to the rotating shaft; Wherein In the support skeleton, there is an assembly cavity for accommodating the bearing body.

9. The blower according to claim 8, characterized in that, On the rotating shaft, there is also an installation part for mating with the wind blade; and between the installation part and the part of the rotating shaft for clearance fit with the through hole, there is an annular limiting groove.

10. The fan according to claim 9, characterized in that, The fan further includes a motor assembly cooperating with the rotating shaft; At the center of the stator skeleton of the motor assembly, there is an annular boss, and in the annular boss, there is a counterbore adapted to be embedded into the assembly cavity; in the counterbore, there is a shaft hole adapted to mate with the rotating shaft; On the circumferential side of the shaft hole, there is a cross-shaped card slot communicating with the shaft hole, and the cross-shaped card slot is adapted to be deformed to be clamped into the annular limiting groove.

11. The fan according to claim 10, characterized in that, A lubricating oil buffer cavity is formed between the assembly cavity and the counterbore of the stator skeleton.

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