Bearing bush

Abstract

The utility model discloses a bearing bush, and relates to the technical field of engineering machinery. Comprising a bushing body, the bushing oil groove comprises at least one first oil guide groove and at least one second oil guide groove which are communicated with each other; the first oil guide groove and the second oil guide groove extend in the circumferential direction of the center of the inner circumference of the bush body by a certain width and cover at least partial area of the bush body; the first oil guide grooves and the second oil guide grooves can be unfolded in the circumferential direction of the lining body to form trapezoidal structures correspondingly. Lubricating oil can be quickly diffused in the first oil guide groove and the second oil guide groove of the trapezoidal structure, the lubricating capacity of the bearing bush is improved, abrasion is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and specifically relates to a bearing bushing. Background Technology

[0002] There are many kinds of sliding bearings used in engines, including but not limited to gear bushings, camshaft bushings and rocker bushings. These different types of sliding bearings play an important role in the engine. They are designed and constructed to adapt to different working conditions and load requirements to ensure efficient and safe operation of the engine. The wear of sliding bearings will have a great impact on the reliability of the engine as a whole and will reduce the operating stability of the engine. In order to improve the wear resistance of sliding bearings, it is usually necessary to open various structures of oil grooves or oil holes on these bushings, and the lubricating oil flows in these oil grooves or oil holes to enhance the lubrication ability.

[0003] However, if too many oil grooves are opened or the size is too large, it is easy to cause the bearing capacity of the bushing to decrease, and the oil is easy to leak from both ends of the bushing under the action of internal high pressure, causing lubrication loss; if too few oil grooves are opened or the size is too small, it is easy to cause the lubrication capacity of the bushing to decrease, and some areas are not fully lubricated, thereby affecting the service life of the parts and then affecting the safe operation of the engine; moreover, the existing oil groove is opened along the axial direction of the bushing to the opening of the shaft end. During high-speed operation, the lubricating oil is also easy to be thrown out laterally from the bearing bushing under the high-speed rotation force, causing leakage of the lubricating oil. Contents of utility model

[0004] The utility model provides a bearing bushing to solve the problem of ensuring the bearing capacity of the bushing and improving the lubrication performance of the bushing.

[0005] The technical solution adopted by this utility model is:

[0006] A bearing bushing, comprising:

[0007] Bushing body;

[0008] The bushing oil groove includes at least one first oil guide groove and at least one second oil guide groove that are connected to each other; the first oil guide groove and the second oil guide groove extend along the circumferential direction of the center of the inner circumference of the bushing body with a certain width, and cover at least a part of the bushing body; the first oil guide groove and the second oil guide groove can form a trapezoidal structure respectively when they are unfolded along the circumferential direction of the bushing body.

[0009] A bearing bushing of the utility model also has the following additional technical features:

[0010] The first oil guide groove and the second oil guide groove are symmetrically distributed along the circumferential direction of the bushing body; or, the first oil guide groove and the second oil guide groove are asymmetrically distributed along the circumferential direction of the bushing body.

[0011] The first oil guide groove has a first connecting end and a first communicating end, and the width of the first communicating end is smaller than the width of the first connecting end; the second oil guide groove has a second connecting end and a second communicating end, and the width of the second communicating end is smaller than the width of the second connecting end;

[0012] The first connecting end is connected to the second connecting end; or, the first connecting end is connected to the second connecting end.

[0013] The width of the first connecting end and / or the second connecting end ranges from 1 to 3 mm.

[0014] The angle between the end of the first connecting end outside the first oil guide groove and the extension line of the side is in the range of 90° to 95°; there is an arc chamfer between the end of the first connecting end inside the first oil guide groove and the side to form a first arc guide surface; the angle between the end of the second connecting end outside the second oil guide groove and the extension line of the side is in the range of 90° to 95°; there is an arc chamfer between the end of the second connecting end inside the second oil guide groove and the side to form a second arc guide surface.

[0015] There is an arc chamfer between the end and the side of the first connecting end inside the first oil guide groove to form a third arc guide surface; there is an arc chamfer between the end and the side of the second connecting end inside the second oil guide groove to form a fourth arc guide surface.

[0016] The bushing oil groove extends 200° to 250° along the circumferential direction of the bushing body.

[0017] The thickness of the first oil guide groove and the second oil guide groove along the radial direction of the bushing body is in the range of 1 to 2 mm.

[0018] One end of the first oil guide groove is connected to a first oil groove opening that passes through the bushing body in a radial direction; one end of the second oil guide groove is connected to a second oil groove opening that passes through the bushing body in a radial direction.

[0019] The inner wall of the first oil groove opening has a first guide camber surface, and the inner wall of the second oil groove opening has a second guide camber surface.

[0020] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are:

[0021] 1. A bearing bushing, comprising a bushing body and a bushing oil groove; the bushing oil groove includes at least one first oil guiding groove and at least one second oil guiding groove that are connected and communicated; the first oil guiding groove and the second oil guiding groove extend along the circumferential direction of the center of the inner circumference of the bushing body with a certain width and cover at least part of the area of the bushing body; the first oil guiding groove and the second oil guiding groove can respectively form a trapezoidal structure when unfolded along the circumferential direction of the bushing body.

[0022] A bushing oil groove is provided on the circumferential direction of the center of the inner circumference of the bushing body, so that the bushing oil groove is located at the center of the whole bushing body, and can have a structure with at least part of the groove along the circumferential direction on the inner side center of the bushing body. Except for this part, the remaining areas can all be used as load-bearing areas. Therefore, the load-bearing capacity of the bearing bushing will not decrease, and since the bushing oil groove is provided in the middle position, the load-bearing areas on both sides are evenly distributed, and uniform load-bearing capacity can be achieved.

[0023] In addition, the bushing oil groove is set to include a first oil guiding groove and a second oil guiding groove that are connected and communicated. The first oil guiding groove and the second oil guiding groove can form a trapezoidal structure when unfolded along the circumferential direction, so that the lubricating oil entering the first oil guiding groove and the second oil guiding groove can achieve step-by-step diffusion of the liquid within the trapezoidal structure, enhancing the flow ability of the lubricating oil. Thus, the lubricating oil can be quickly diffused within the first oil guiding groove and the second oil guiding groove of the trapezoidal structure, and further fully diffused to multiple lubricating areas within the bearing bushing, improving the lubricating ability of the bearing bushing, reducing wear, and extending the service life; the oil leakage amount of the lubricating oil from the bearing bushing is reduced, so that the lubricating oil flows slowly, and sufficient lubrication can be achieved, reducing the friction between the moving element and the sliding element, preventing slipping, reducing the overall temperature, and improving the operation stability and durability of the bearing and even the engine.

[0024] 2. As a preferred embodiment of the present utility model, the first oil guiding groove and the second oil guiding groove are symmetrically distributed along the circumferential direction of the bushing body; or, the first oil guiding groove and the second oil guiding groove are asymmetrically distributed along the circumferential direction of the bushing body.

[0025] There are two distribution forms of the first oil guide groove and the second oil guide groove. In the first distribution form, the first oil guide groove and the second oil guide groove can be symmetrically distributed along the circumferential direction, that is, the first oil guide groove and the second oil guide groove have the same and symmetrical structures, so that when the lubricating oil flows from one side to the other side, for example, from the first oil guide groove to the second oil guide groove, since the first oil guide groove and the second oil guide groove are trapezoidal structures, the coverage area of ​​the lubricating oil liquid gradually changes along the trapezoidal structure, which can enhance the flow capacity of the lubricating oil liquid; in the second distribution form, the first oil guide groove and the second oil guide groove are asymmetrically distributed, that is, the first oil guide groove and the second oil guide groove are different in size, but their shapes are still trapezoidal structures, and the flow area of ​​the lubricating oil liquid along the first oil guide groove and the second oil guide groove is constantly changing, and the fluidity of the lubricating oil liquid is improved; thereby achieving rapid lubrication inside the bearing bushing, improving lubrication capacity, and reducing friction and wear.

[0026] 3. As a preferred embodiment of the utility model, the first oil guide groove has a first connecting end and a first communicating end, the width of the first communicating end is smaller than the width of the first connecting end; the second oil guide groove has a second connecting end and a second communicating end, the width of the second communicating end is smaller than the width of the second connecting end; the first communicating end is connected to the second communicating end; or, the first connecting end is connected to the second connecting end.

[0027] The first connecting end and the first communicating end of the first oil guide groove are distributed at both ends of the first oil guide groove. Since the first oil guide groove is a trapezoidal structure, the width of the first communicating end is smaller than the width of the first connecting end; similarly, the width of the second communicating end of the second oil guide groove is smaller than the width of the second connecting end.

[0028] There are two ways to connect the first oil guide groove and the second oil guide groove: the first way is to connect the first connecting end with the second connecting end, at which time the small diameter ends of the first oil guide groove and the second oil guide groove are connected, and the width of the bushing oil groove formed by the first oil guide groove and the second oil guide groove along the circumferential direction is stepped, that is, from wide to narrow and then to wide; the second way is to connect the first connecting end with the second connecting end, at which time the large diameter ends of the first oil guide groove and the second oil guide groove are connected, and the width of the bushing oil groove formed by the first oil guide groove and the second oil guide groove along the circumferential direction is stepped, that is, from narrow to wide and then to narrow.

[0029] 4. As a preferred embodiment of the present utility model, the width of the first connecting end and / or the second connecting end ranges from 1 to 3 mm.

[0030] The first connecting end and the second connecting end are small diameter ends, and the value range is 1 to 3 mm. The purpose is to ensure the smooth passage of lubricating oil and avoid the lubricating oil covering too large an area, avoid the leakage of lubricating oil, and reduce the loss of lubricating oil.

[0031] 5. As a preferred embodiment of the present utility model, the included angle between the end of the first communication end outside the first oil guide groove and the extension line of the side portion ranges from 90° to 95°; there is an arc chamfer between the end of the first communication end inside the first oil guide groove and the side portion to form a first arc flow guiding surface; the included angle between the end of the second communication end outside the second oil guide groove and the extension line of the side portion ranges from 90° to 95°; there is an arc chamfer between the end of the second communication end inside the second oil guide groove and the side portion to form a second arc flow guiding surface.

[0032] Located outside the first oil guide groove, the included angle between the first communication end and the extension line of the side portion ranges from 90° to 95°, so that an obtuse angle is formed between the first communication end and the side portion, thereby making the first oil guide groove in a trapezoidal structure; located inside the first oil guide groove, an arc chamfer is formed between the first communication end and the side portion, so that a first arc flow guiding surface is formed between the first communication end and the side portion, which can enable the lubricating oil flowing through the first oil guide groove to flow smoothly along the arc flow guiding surface and will not cause excessive movement curvature at the corner position of the first oil guide groove to generate vortex backflow, resulting in local vacuum.

[0033] Similarly, the included angle between the end of the second communication end outside the second oil guide groove and the extension line of the side portion ranges from 90° to 95°, so that an obtuse angle is formed between the second communication end and the side portion, thereby making the second oil guide groove in a trapezoidal structure; located inside the second oil guide groove, an arc chamfer is formed between the second communication end and the side portion, so that a second arc flow guiding surface is formed between the second communication end and the side portion, which can enable the lubricating oil flowing through the second oil guide groove to flow smoothly along the arc flow guiding surface and will not cause excessive movement curvature at the corner position of the second oil guide groove to generate vortex backflow, resulting in local vacuum. Description of the Drawings

[0034] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0035] Figure 1 is a schematic structural diagram of a bearing bushing under an embodiment of the present utility model;

[0036] Figure 2 is a schematic structural diagram of the bushing oil groove of a bearing bushing after being unfolded along the circumferential direction of the bushing body under an embodiment of the present utility model;

[0037] Among them,

[0038] 1. Bushing body;

[0039] 2. Bushing oil groove; 21. First oil guiding groove; 22. Second oil guiding groove;

[0040] 3. First connection end; 4. First communication end; 5. Second connection end; 6. Second communication end; 7. First arc-shaped flow guiding surface; 8. Second arc-shaped flow guiding surface; 9. Third arc-shaped flow guiding surface; 10. Fourth arc-shaped flow guiding surface; a - The included angle between the end part and the side extension line of the second communication end outside the second oil guiding groove. Detailed implementation mode

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0042] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships 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 to the present utility model.

[0043] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "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, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and 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.

[0044] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description referring to terms such as "implementation mode", "embodiment", "an embodiment", "example" or "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] To more clearly illustrate the overall concept of the present utility model, the following will be described in detail by way of examples in conjunction with the accompanying drawings of the specification.

[0046] The present utility model relates to a bearing bushing, as Figure 1-2 shown, including:

[0047] A bushing body 1;

[0048] A bushing oil groove 2, the bushing oil groove 2 includes at least one first oil guiding groove 21 and at least one second oil guiding groove 22 that are connected and communicated; the first oil guiding groove 21 and the second oil guiding groove 22 extend along the circumferential direction of the center of the inner circumference of the bushing body 1 with a certain width, and cover at least part of the area of the bushing body 1; the first oil guiding groove 21 and the second oil guiding groove 22 can respectively form a trapezoidal structure when unfolded along the circumferential direction of the bushing body 1.

[0049] An oil groove 2 is provided on the circumferential direction of the center of the inner circumference of the bushing body 1 of the present application, so that the bushing oil groove 2 is located at the center of the whole bushing body 1, and can have a structure with at least part of it being hollow along the circumferential direction on the inner side center of the bushing body 1. Except for this part, the rest of the area can be used as a bearing area. Therefore, the bearing capacity of the bearing bushing will not decrease, and since the bushing oil groove 2 is opened in the middle position, the bearing areas on both sides are evenly distributed, and a uniform bearing capacity can be achieved.

[0050] In addition, the bushing oil groove 2 is arranged to include a first oil guiding groove 21 and a second oil guiding groove 22 that are connected and communicated. The first oil guiding groove 21 and the second oil guiding groove 22 can form a trapezoidal structure when unfolded along the circumferential direction, so that the lubricating oil entering the first oil guiding groove 21 and the second oil guiding groove 22 can achieve a gradual diffusion of the liquid within the trapezoidal structure, enhancing the flow ability of the lubricating oil. Thus, the lubricating oil can be quickly diffused within the first oil guiding groove 21 and the second oil guiding groove 22 of the trapezoidal structure, and further fully diffused to multiple lubrication areas within the bearing bushing, improving the lubrication ability of the bearing bushing, reducing wear, and extending the service life; the oil leakage amount of the lubricating oil from the bearing bushing is reduced, making the lubricating oil flow slowly, enabling sufficient lubrication, reducing the friction between the moving element and the sliding element, not generating slippage, reducing the overall temperature, and improving the operating stability and durability of the bearing and even the engine.

[0051] It should be noted that preferably, the first oil guiding groove 21 and the second oil guiding groove 22 extend along the circumferential direction of the center of the inner circumference of the bushing body 1 with a certain width and cover two-thirds of the area of the bushing body 1.

[0052] Regarding the distribution of the first oil guiding groove 21 and the second oil guiding groove 22, it is not limited by the present application and there can be various implementation manners. Specifically, any one of the following can be adopted:

[0053] Embodiment 1: The first oil guide groove 21 and the second oil guide groove 22 are symmetrically distributed along the circumferential direction of the bushing body 1.

[0054] The first oil guide groove 21 and the second oil guide groove 22 can be symmetrically distributed along the circumferential direction, that is, the first oil guide groove 21 and the second oil guide groove 22 have the same structure and are symmetrical. Thus, when the lubricating oil flows from one side to the other side, for example, from the first oil guide groove 21 to the second oil guide groove 22, since the first oil guide groove 21 and the second oil guide groove 22 are trapezoidal structures, the coverage area of the lubricating oil liquid gradually changes along the trapezoidal structure, which can enhance the flow ability of the lubricating oil liquid.

[0055] Embodiment 2: The first oil guide groove 21 and the second oil guide groove 22 are asymmetrically distributed along the circumferential direction of the bushing body 1.

[0056] When the first oil guide groove 21 and the second oil guide groove 22 are asymmetrically distributed, that is, the first oil guide groove 21 and the second oil guide groove 22 have different sizes, but their shapes are still trapezoidal structures, the flow area of the lubricating oil liquid along the first oil guide groove 21 and the second oil guide groove 22 is constantly changing, and the fluidity of the lubricating oil liquid is improved; thus, rapid lubrication can be achieved inside the bearing bushing, the lubrication ability can be improved, and friction and wear can be reduced.

[0057] Specifically, the first oil guide groove 21 has a first connection end 3 and a first communication end 4, and the width of the first communication end 4 is smaller than the width of the first connection end 3; the second oil guide groove 22 has a second connection end 5 and a second communication end 6, and the width of the second communication end 6 is smaller than the width of the second connection end 5.

[0058] Regarding the connection manner of the first oil guide groove 21 and the second oil guide groove 22, it is not limited by this application and there can be various implementation manners. Specifically, any one of the following can be adopted:

[0059] Embodiment 1: The first communication end 4 is docked with the second communication end 6.

[0060] In this embodiment, the first communication end 4 is connected to the second communication end 6. At this time, the small-diameter ends of the first oil guide groove 21 and the second oil guide groove 22 are connected. At this time, the width of the bushing oil groove 2 formed by the first oil guide groove 21 and the second oil guide groove 22 along the circumferential direction is stepped, that is, from wide to narrow and then to wide.

[0061] Embodiment 2: The first connection end 3 is docked with the second connection end 5.

[0062] In this embodiment, the first connection end 3 is connected to the second connection end 5. At this time, the large-diameter ends of the first oil guiding groove 21 and the second oil guiding groove 22 are connected. At this time, the width of the bushing oil groove 2 formed by the first oil guiding groove 21 and the second oil guiding groove 22 is distributed in a stepped manner along the circumferential direction, that is, from narrow to wide and then to narrow.

[0063] As a preferred embodiment, the width of the first communication end 4 and / or the second communication end 6 ranges from 1 to 3 mm.

[0064] The first communication end 4 and the second communication end 6 are small-diameter ends, and their values range from 1 to 3 mm. The purpose is to ensure the smooth passage of lubricating oil while avoiding too large a coverage area of the lubricating oil, preventing leakage of the lubricating oil, and reducing the loss of the lubricating oil.

[0065] It should be noted that based on the three-dimensional model, considering the accessory load and speed fluctuation, a bearing bushing EHD model is built, the center orbit curve is calculated, and then the load-bearing area is judged. When designing the bushing oil groove, try to avoid the load-bearing area. And by setting variable parameters, EHD calculations are performed on different bushing oil grooves, and the optimal scheme of the bushing oil groove is evaluated by comparison. Preferably, the width dimensions of the first communication end 4 and the second communication end 6 are selected as 2 mm.

[0066] As a preferred embodiment, the included angle between the end of the first communication end 4 outside the first oil guiding groove 21 and the extension line of the side is in the range of 90° to 95°; there is an arc chamfer between the end of the first communication end 4 inside the first oil guiding groove 21 and the side to form a first arc guiding surface 7; the included angle between the end of the second communication end 6 outside the second oil guiding groove 22 and the extension line of the side is in the range of 90° to 95°; there is an arc chamfer between the end of the second communication end 6 inside the second oil guiding groove 22 and the side to form a second arc guiding surface 8.

[0067] Located outside the first oil guiding groove 21, the included angle between the first communication end 4 and the extension line of the side is in the range of 90° to 95°, so that an obtuse angle is formed between the first communication end 4 and the side, so that the first oil guiding groove 21 has a trapezoidal structure; located inside the first oil guiding groove 21, an arc chamfer is formed between the first communication end 4 and the side, so that a first arc guiding surface 7 is formed between the first communication end 4 and the side, which can make the lubricating oil flowing through the first oil guiding groove 21 flow smoothly along the first arc guiding surface 7, and will not cause too large a movement curvature at the corner position of the first oil guiding groove 21 to generate a vortex backflow, resulting in local vacuum;

[0068] Similarly, the included angle α between the end of the second communication end 6 outside the second oil guide groove 22 and the extended line of the side is in the range of 90° to 95°, so that an obtuse angle is formed between the second communication end 6 and the side, thereby making the second oil guide groove 22 have a trapezoidal structure; inside the second oil guide groove 22, an arc chamfer is formed between the second communication end 6 and the side, so that a second arc flow guiding surface 8 is formed between the second communication end 6 and the side, which can make the lubricating oil flowing through the second oil guide groove 22 flow smoothly along the second arc flow guiding surface 8, and will not cause excessive movement curvature at the corner position of the second oil guide groove 22 to generate vortex backflow, resulting in local vacuum.

[0069] It should be noted that based on the three-dimensional model, considering the accessory load and speed fluctuation, an EHD model of the bearing bushing is built, the center orbit curve is calculated, and then the load-bearing area is judged. When designing the bushing oil groove, try to avoid the load-bearing area. And by setting variable parameters, EHD calculations are carried out on bushing oil grooves of different sizes, and the optimal scheme of the bushing oil groove is evaluated by comparison. Preferably, the included angle between the end of the first communication end 4 outside the first oil guide groove 21 and the extended line of the side is taken as 92°; the included angle between the end of the second communication end 6 outside the second oil guide groove 22 and the extended line of the side is taken as 92°.

[0070] As a preferred implementation manner, there is an arc chamfer between the end of the first connection end 3 inside the first oil guide groove 21 and the side to form a third arc flow guiding surface 9; there is an arc chamfer between the end of the second connection end 5 inside the second oil guide groove 22 and the side to form a fourth arc flow guiding surface 10.

[0071] There is an arc chamfer between the end of the first connection end 3 inside the first oil guide groove 21 and the side, so that both sides in the width direction of the first oil guide groove 21 have a third arc flow guiding surface 9, which can buffer the water flow, so that the lubricating oil flowing through the first oil guide groove 21 can smoothly transition along the third arc flow guiding surface 9, and will not have excessive movement curvature here to cause vortex backflow, resulting in local vacuum, so that the lubricating liquid can be fully lubricated in each area inside the first oil guide groove 21, improving the lubrication performance and reducing the friction and wear inside the bearing bushing;

[0072] Similarly, there is an arc chamfer between the end of the second connection end 5 inside the second oil guide groove 22 and the side, so that both sides in the width direction of the second oil guide groove 22 have a fourth arc flow guiding surface 10, which can buffer the water flow, so that the lubricating oil flowing through the second oil guide groove 22 can smoothly transition along the fourth arc flow guiding surface 10, and will not have excessive movement curvature here to cause vortex backflow, resulting in local vacuum, so that the lubricating liquid can be fully lubricated in each area inside the second oil guide groove 22, improving the lubrication performance and reducing the friction and wear inside the bearing bushing.

[0073] As a preferred embodiment, the bushing oil groove 2 extends 200° to 250° along the circumferential direction of the bushing body 1.

[0074] It should be noted that based on the three-dimensional model, considering the accessory load and rotational speed fluctuation, a bearing bushing EHD model is built, the center orbit curve is calculated, and thus the load-bearing area is judged. When designing the bushing oil groove, the load-bearing area should be avoided as much as possible. And by setting variable parameters, EHD calculations are carried out for different bushing oil grooves, and the optimal scheme of the bushing oil groove is compared and evaluated. Preferably, the bushing oil groove 2 extends 240° along the circumferential direction of the bushing body 1.

[0075] As a preferred embodiment, the thickness ranges of the first oil guiding groove 21 and the second oil guiding groove 22 along the radial direction of the bushing body 1 are both 1 to 2 mm.

[0076] It should be noted that based on the three-dimensional model, considering the accessory load and rotational speed fluctuation, a bearing bushing EHD model is built, the center orbit curve is calculated, and thus the load-bearing area is judged. When designing the bushing oil groove, the load-bearing area should be avoided as much as possible. And by setting variable parameters, EHD calculations are carried out for different bushing oil grooves, and the optimal scheme of the bushing oil groove is compared and evaluated. Preferably, the thickness ranges of the first oil guiding groove 21 and the second oil guiding groove 22 along the radial direction of the bushing body 1 are both 2 mm.

[0077] As a preferred embodiment, one end of the first oil guiding groove 21 is connected with a first oil groove opening that penetrates the bushing body 1 along the radial direction; one end of the second oil guiding groove 22 is connected with a second oil groove opening that penetrates the bushing body 1 along the radial direction.

[0078] Specifically, a first oil groove opening is provided on the side of the first oil guiding groove 21 away from the second oil guiding groove 22. The first oil groove opening can penetrate the bushing body 1 along the radial direction to realize the setting of a through hole, so that lubricating oil enters the first oil guiding groove 21 through the first oil groove opening and flows along the first oil guiding groove 21 and the second oil guiding groove 22, realizing the lubrication between the bushing body 1 and the components inside the bushing body 1; a second oil groove opening is provided on the side of the second oil guiding groove 22 away from the first oil guiding groove 21. The second oil groove opening can penetrate the bushing body 1 along the radial direction to realize the setting of a through hole, so that lubricating oil enters the second oil guiding groove 22 through the second oil groove opening and flows along the second oil guiding groove 22 and the first oil guiding groove 21, realizing the lubrication between the bushing body 1 and the components inside the bushing body 1, reducing friction and wear, and enhancing the service life of the bearing bushing.

[0079] Furthermore, the inner wall of the first oil groove opening has a first guiding arc surface, and the inner wall of the second oil groove opening has a second guiding arc surface.

[0080] Specifically, the cross-sectional shape of the first oil tank opening can be designed such that the middle part has a rectangular structure and the two ends have an arc-shaped structure, so that both sides in the length direction of the first oil tank have a first guiding arc surface. The lubricating oil can achieve smooth flow under the guiding action of the first guiding arc surface, enhancing the flow capacity of the lubricating oil and achieving sufficient lubrication. Similarly, the cross-sectional shape of the second oil tank opening is designed such that the middle part has a rectangular structure and the two ends have an arc-shaped structure, so that both sides in the length direction of the second oil tank have a second guiding arc surface. The lubricating oil can achieve smooth flow under the guiding action of the first guiding arc surface, enhancing the flow performance of the lubricating oil, making the lubrication more sufficient, and enabling the lubricating oil to smoothly enter the first oil guiding groove 21 or the second oil guiding groove 22, improving the lubrication effect.

[0081] What is not described in this utility model can be realized by adopting or referring to the existing technologies.

[0082] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0083] The above description is only for the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, various modifications and changes can be made to this utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this utility model shall be included within the scope of the claims of this utility model.

Claims

1. A bearing bushing, characterized in that: include: Bushing body (1); A bushing oil groove (2), the bushing oil groove (2) comprising at least one first oil guide groove (21) and at least one second oil guide groove (22) which are connected to each other; the first oil guide groove (21) and the second oil guide groove (22) extend in a circumferential direction of the center of the inner circumference of the bushing body (1) with a certain width, and cover at least a partial area of ​​the bushing body (1); the first oil guide groove (21) and the second oil guide groove (22) can respectively form a trapezoidal structure when unfolded along the circumferential direction of the bushing body (1).

2. A bearing bushing according to claim 1, characterized in that: The first oil guide groove (21) and the second oil guide groove (22) are symmetrically distributed along the circumferential direction of the bushing body (1); or the first oil guide groove (21) and the second oil guide groove (22) are asymmetrically distributed along the circumferential direction of the bushing body (1).

3. A bearing bushing according to claim 1, characterized in that: The first oil guide groove (21) has a first connecting end (3) and a first communicating end (4), the width of the first communicating end (4) being smaller than the width of the first connecting end (3); the second oil guide groove (22) has a second connecting end (5) and a second communicating end (6), the width of the second communicating end (6) being smaller than the width of the second connecting end (5); The first connecting end (4) is connected to the second connecting end (6); or the first connecting end (3) is connected to the second connecting end (5).

4. A bearing bushing according to claim 3, characterized in that: The width of the first connecting end (4) and / or the second connecting end (6) is in the range of 1 to 3 mm.

5. A bearing bushing according to claim 3, characterized in that: The angle between the end of the first connecting end (4) outside the first oil guide groove (21) and the extension line of the side portion is in the range of 90° to 95°; the end of the first connecting end (4) inside the first oil guide groove (21) and the side portion are provided with an arc chamfer to form a first arc guide surface (7); The angle between the end of the second connecting end (6) outside the second oil guide groove (22) and the extension line of the side portion is in the range of 90° to 95°; and there is an arc chamfer between the end of the second connecting end (6) inside the second oil guide groove (22) and the side portion to form a second arc guide surface (8).

6. A bearing bushing according to claim 3, characterized in that: An arc chamfer is provided between the end and the side of the first connecting end (3) inside the first oil guide groove (21) to form a third arc guide surface (9); an arc chamfer is provided between the end and the side of the second connecting end (5) inside the second oil guide groove (22) to form a fourth arc guide surface (10).

7. A bearing bushing according to claim 1, characterized in that: The bushing oil groove (2) extends 200° to 250° along the circumferential direction of the bushing body (1).

8. A bearing bushing according to claim 1, characterized in that: The thickness of the first oil guide groove (21) and the second oil guide groove (22) along the radial direction of the bushing body (1) are both in the range of 1 to 2 mm.

9. A bearing bushing according to claim 1, characterized in that: One end of the first oil guide groove (21) is connected to a first oil groove opening that radially passes through the bushing body (1); one end of the second oil guide groove (22) is connected to a second oil groove opening that radially passes through the bushing body (1).

10. A bearing bushing according to claim 9, characterized in that: The inner wall of the first oil groove opening has a first guide camber surface; the inner wall of the second oil groove opening has a second guide camber surface.

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