An asymmetric roller shaft bearing fan shaft component

Abstract

This utility model discloses an asymmetric roller shaft bearing fan shaft component, including a bearing housing, an inner cavity of which houses a shaft bearing, and a shaft bearing including a spindle. The outer surface of the spindle has an outer ring, and the inner surface of the outer ring, from left to right, is arranged with cylindrical rollers I, roller retainers I, steel balls, cylindrical rollers II, and roller retainers II. One side of the shaft bearing has a retaining ring for a bore, and the fan shaft is located on the right side of the inner wall of the bearing housing. Because the fan shaft component is a cantilever beam structure, the radial load borne by the cylindrical rollers II closer to the fan is greater than that of the cylindrical rollers I on the other side. Based on this characteristic, the design makes the length of the cylindrical rollers II greater than that of the cylindrical rollers I and I. With the same diameter, longer rollers can increase load-bearing capacity, precisely match different radial load requirements, avoid premature wear due to load concentration, and extend service life.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, specifically to an asymmetric roller shaft connecting bearing fan shaft component. Background Technology

[0002] An engine is a power machine that can convert other forms of energy (such as chemical energy, electrical energy, thermal energy, etc.) into mechanical energy. Its core function is to provide driving power for various equipment through specific working processes. It is widely used in automobiles, ships, aircraft, power generation equipment, construction machinery and other fields. The fan is a key component in the engine cooling system, which is directly or indirectly connected to the fan shaft component through conversion pads.

[0003] The main technical problems with existing fan shaft components lie in the mismatch between the bearing structure design and the actual force requirements. Specifically, the shaft bearings used in fan shaft components typically have a structure of "two rows of cylindrical rollers + one row of four-point contact balls," with the two rows of cylindrical rollers being the same size. However, the force characteristics of the fan shaft component are that of a cantilever beam structure. According to the principle of force balance, the radial load borne by the row of cylindrical rollers closer to the fan is greater than that of the other row. In this case, the two rows of cylindrical rollers of the same size cannot adapt to different radial load requirements: the rollers on the fan side, which bear a greater load, are not designed with their length specifically in mind, and their load-bearing capacity is not enhanced. They are prone to premature wear or damage due to long-term bearing of larger loads, thus affecting the service life of the entire fan shaft component and increasing maintenance costs. This cannot meet the requirements of application scenarios with high bearing life requirements. Therefore, we propose an asymmetric roller shaft bearing fan shaft component. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an asymmetric roller bearing fan shaft component with the advantage of long service life. It solves the technical problems of existing fan shaft components, primarily the mismatch between the bearing structure design and actual load requirements. Specifically, the bearings used in fan shaft components typically have a structure of "two rows of cylindrical rollers + one row of four-point contact balls," with the two rows of cylindrical rollers being the same size. However, the load characteristics of the fan shaft component are a cantilever beam structure. According to the principle of force balance, the radial load borne by the row of cylindrical rollers closer to the fan is greater than that of the other row. In this case, the two rows of cylindrical rollers of the same size cannot adapt to the different radial load requirements: the rollers on the fan side, which bear a greater load, are not designed with their length specifically in mind, and their load-bearing capacity is not enhanced. They are prone to premature wear or damage due to long-term exposure to larger loads, thus affecting the service life of the entire fan shaft component, leading to increased maintenance costs, and failing to meet the needs of applications requiring high bearing life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an asymmetric roller shaft-connected bearing fan shaft component, comprising a bearing housing, an inner cavity of the bearing housing containing a shaft-connected bearing, the shaft-connected bearing comprising a spindle, an outer ring on the outer surface of the spindle, and, from left to right, cylindrical roller I, roller retainer I, steel ball, cylindrical roller II, and roller retainer II arranged sequentially on the inner surface of the outer ring, a perforated elastic retainer ring on one side of the shaft-connected bearing, a fan shaft on the right side of the inner wall of the bearing housing, a dust cover on the left side of the inner wall of the bearing housing, and sealing rings on both sides of the inner surface of the outer ring, one side of the sealing ring contacting the spindle.

[0006] Preferably, the outer surface of the bearing housing is provided with a mounting bracket, and a bolt through hole is provided on one side of the mounting bracket.

[0007] Preferably, the bearing housing has an inner cavity for installing a shaft-connected bearing, and the left side of the bearing housing has a first annular groove for installing a dust cover.

[0008] Preferably, a second annular groove for an elastic retaining ring for mounting holes is provided on one side of the bearing housing cavity, and the shaft-connected bearing has an asymmetric roller structure.

[0009] Preferably, the length of the cylindrical roller II is greater than the length of the cylindrical roller I, and a steel ball retainer is provided on the surface of the steel ball, with one side of the steel ball retainer fixedly connected to the outer ring.

[0010] Preferably, the fan shaft has a multi-step structure, with an inner hole on one side for connection to the spindle and a threaded hole on the right side.

[0011] Compared with the prior art, this utility model provides an asymmetric roller shaft connected bearing fan shaft component, which has the following beneficial effects:

[0012] This utility model component is fixed to the engine via a bearing housing mounting bracket and bolt holes. The fan is directly or via a pad connected to the threaded hole of the fan shaft. Engine power is input through the spindle, driving the fan shaft to rotate the fan and complete the power output for cooling. Because the fan shaft component is a cantilever beam structure, the radial load borne by the cylindrical roller II closer to the fan is greater than that of the cylindrical roller I on the other side. Based on this characteristic, the design makes the length of cylindrical roller II greater than that of cylindrical roller I. With the same diameter, the longer roller can improve the load-bearing capacity, accurately match different radial load requirements, avoid premature wear caused by load concentration, and extend service life. Cylindrical roller I and cylindrical roller II mainly bear radial loads. The load is evenly distributed through corresponding roller retainers I and II, reducing friction loss and ensuring radial running stability. The steel balls adopt a four-point contact structure, working with the steel ball retainers to bear the axial load, restrict axial movement, and ensure the axial positioning accuracy of the components. The hole uses an elastic retaining ring installed in the second annular groove of the bearing housing to fix the axial position of the shaft-connected bearing and prevent loosening during operation. The dust cover prevents dust and impurities from entering, protecting the internal lubrication environment. The sealing ring is located on both sides of the shaft-connected bearing to enhance sealing and reduce lubricant loss. The outer ring is interference-fitted with the cavity opened in the bearing housing, and the inner hole opened in the fan shaft is interference-fitted with the spindle to ensure connection strength and avoid vibration and wear caused by relative sliding. Attached Figure Description

[0013] Figure 1 A perspective view of the asymmetric roller shaft connecting bearing fan shaft component of the utility model;

[0014] Figure 2 This is a top view of the asymmetric roller shaft connecting bearing fan shaft component of the utility model;

[0015] Figure 3 This is a cross-sectional view of the asymmetric roller shaft connecting bearing fan shaft component of the utility model.

[0016] Figure 4 This is a cross-sectional view of a utility model asymmetric roller bearing.

[0017] In the diagram: 1. Bearing housing; 2. Shaft-connected bearing; 2-1. Mandrel; 2-2. Outer ring; 2-3. Cylindrical roller I; 2-4. Roller retainer I; 2-5. Steel ball; 2-6. Steel ball retainer; 2-7. Cylindrical roller II; 2-8. Roller retainer II; 2-9. Sealing ring; 3. Hole retaining ring; 4. Fan shaft; 5. Dust cover. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0020] Please see Figures 1 to 4 As shown, this utility model provides an asymmetric roller shaft bearing fan shaft component, including a bearing housing 1, a shaft bearing 2 disposed in the inner cavity of the bearing housing 1, the shaft bearing 2 including a spindle 2-1, an outer ring 2-2 disposed on the outer surface of the spindle 2-1, and cylindrical rollers I 2-3, roller retainers I 2-4, steel balls 2-5, cylindrical rollers II 2-7 and roller retainers II 2-8 disposed sequentially from left to right on the inner surface of the outer ring 2-2, an elastic retainer 3 for the hole disposed on one side of the shaft bearing 2, a fan shaft 4 disposed on the right side of the inner wall of the bearing housing 1, a dust cover 5 disposed on the left side of the inner wall of the bearing housing 1, and sealing rings 2-9 disposed on both sides of the inner surface of the outer ring 2-2, with one side of the sealing rings 2-9 contacting the spindle 2-1.

[0021] The outer surface of the bearing housing 1 is provided with a mounting bracket, and a bolt through hole is provided on one side of the mounting bracket.

[0022] The bearing housing 1 has an inner cavity for installing the shaft bearing 2, and the left side of the bearing housing 1 has a first annular groove for installing the dust cover 5.

[0023] The bearing housing 1 has a second annular groove for mounting holes provided on one side of the inner cavity, and the shaft-connected bearing 2 has an asymmetric roller structure.

[0024] The length of cylindrical roller II 2-7 is greater than the length of cylindrical roller I 2-3. A steel ball retainer 2-6 is provided on the surface of steel ball 2-5. One side of the steel ball retainer 2-6 is fixedly connected to the outer ring 2-2.

[0025] The fan shaft 4 has a multi-step structure. One side of the fan shaft 4 has an inner hole that connects to the spindle 2-1, and the right side of the fan shaft 4 has a threaded hole.

[0026] Working principle: The component is fixed to the engine through the mounting brackets and bolt holes of the bearing housing 1. The fan is directly or via a pad connected to the threaded hole of the fan shaft 4. Engine power is input through the spindle 2-1, which drives the fan shaft 4 to rotate the fan, thus completing the power output for cooling. Because the fan shaft 4 component is a cantilever beam structure, the radial load borne by the cylindrical roller II2-7 near the fan is greater than that of the cylindrical roller I2-3 on the other side. Based on this characteristic, the length of the cylindrical roller II2-7 is made longer than that of the cylindrical roller I and I2-3 in the design. With the same diameter, the longer roller can improve the load-bearing capacity, accurately match different radial load requirements, avoid premature wear caused by load concentration, and extend service life. The cylindrical rollers I2-3 and II2-7 mainly bear the radial load. The roller retainers Ⅰ2-4 and Ⅱ2-8 maintain a uniform distribution, reducing friction loss and ensuring radial operation stability. The steel balls 2-5 adopt a four-point contact structure, which, together with the steel ball retainer 2-6, bears the axial load, restricts axial movement, and ensures the axial positioning accuracy of the components. The elastic retaining ring 3 is installed in the second annular groove of the bearing housing 1 to fix the axial position of the shaft-connected bearing 2 and prevent loosening during operation. The dust cover 5 is set to block dust and impurities from entering and protect the internal lubrication environment. The sealing rings 2-9 are located on both sides of the shaft-connected bearing 2 to enhance sealing and reduce lubricant loss. The outer ring 2-2 is interference-fitted with the cavity opened in the inner cavity of the bearing housing 1. The inner hole opened in the fan shaft 4 is interference-fitted with the spindle 2-1 to ensure connection strength and avoid vibration and wear caused by relative sliding.

[0027] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0028] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An asymmetric roller shaft bearing fan shaft assembly comprising a bearing housing (1), characterized in that: The bearing housing (1) has a shaft-connecting bearing (2) in its inner cavity. The shaft-connecting bearing (2) includes a spindle (2-1). The outer surface of the spindle (2-1) is provided with an outer ring (2-2). The inner surface of the outer ring (2-2) is provided with cylindrical roller I (2-3), roller retainer I (2-4), steel ball (2-5), cylindrical roller II (2-7), and roller retainer II (2-8) from left to right. A retaining ring (3) for a hole is provided on one side of the shaft-connecting bearing (2). A fan shaft (4) is provided on the right side of the inner wall of the bearing housing (1). A dust cover (5) is provided on the left side of the inner wall of the bearing housing (1). A sealing ring (2-9) is provided on both sides of the inner surface of the outer ring (2-2). One side of the sealing ring (2-9) is in contact with the spindle (2-1).

2. An asymmetric roller shaft bearing fan shaft component according to claim 1, characterized in that: The outer surface of the bearing housing (1) is provided with a mounting bracket, and a bolt through hole is provided on one side of the mounting bracket.

3. An asymmetric roller shaft bearing fan shaft component according to claim 1, wherein: The bearing housing (1) has an inner cavity for installing the shaft bearing (2), and the left side of the bearing housing (1) has a first annular groove for installing the dust cover (5).

4. An asymmetric roller shaft bearing fan shaft assembly according to claim 1 wherein: The bearing housing (1) has a second annular groove for an elastic retaining ring (3) for mounting holes on one side of its inner cavity, and the shaft-connected bearing (2) has an asymmetric roller structure.

5. An asymmetric roller shaft bearing fan shaft assembly according to claim 1 wherein: The length of the cylindrical roller II (2-7) is greater than the length of the cylindrical roller I (2-3), and a steel ball retainer (2-6) is provided on the surface of the steel ball (2-5). One side of the steel ball retainer (2-6) is fixedly connected to the outer ring (2-2).

6. An asymmetric roller shaft bearing fan shaft assembly according to claim 1 wherein: The fan shaft (4) has a multi-step structure. One side of the fan shaft (4) has an inner hole that connects to the spindle (2-1), and the right side of the fan shaft (4) has a threaded hole.

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