A lubricated bushing
By designing annular oil reservoirs and oil guide grooves in the bushing, the problems of insufficient oil storage and uneven lubrication in traditional bushings are solved, achieving efficient and stable lubrication, extending equipment service life and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ERISK MINING CONSTR MASCH CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional bushings have limited oil storage capacity and small lubrication area, resulting in high lubrication frequency, poor lubrication effect, and easy intrusion of impurities such as mineral powder, which affects the life and stability of the equipment.
Design an annular oil reservoir to increase oil storage capacity and lubrication area. Construct a direct lubrication path through oil guide grooves and guide holes. Group the oil reservoirs to ensure uniform distribution of lubricating oil and avoid localized wear.
It improves lubrication efficiency, reduces the frequency of lubrication, extends equipment life, reduces maintenance costs, and ensures the stability and uniformity of lubrication effect.
Smart Images
Figure CN224339339U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bushing technology, and in particular to a lubricating bushing. Background Technology
[0002] In the field of mechanical transmission, bushings are key components, and their lubrication performance is crucial to equipment operation. Traditional bushings mostly adopt a perforated oil reservoir structure, which has many drawbacks. Their oil capacity is extremely limited, making it difficult to meet the needs of long-term operation, leading to excessively frequent lubrication, increasing maintenance costs and downtime. The lubrication area is relatively small, failing to fully cover the friction surfaces, resulting in unsatisfactory lubrication and easily causing component wear. Impurities such as mineral powder can easily penetrate into the perforated structure. Once intruded, they quickly destroy the lubrication layer, causing lubrication failure, which in turn greatly increases the bushing wear rate, seriously affecting the service life and operational stability of the equipment.
[0003] Chinese Patent Publication No. CN103241281A, Publication Date: August 14, 2013, discloses a Chinese patent entitled "Steering Gear Rack Bushing," which includes a bushing body. The bushing body has several oil storage holes for storing solid lubricating grease. The opening diameter of the oil storage holes on the outer wall of the bushing body is smaller than the opening diameter on the inner wall of the bushing body. Both ends of the bushing body also have outwardly extending bosses, and each boss has four locking slots at its bottom. This bushing has a perforated oil storage structure, a relatively small oil storage capacity, and requires frequent refilling. Utility Model Content
[0004] This utility model discloses a lubrication bushing that increases the oil storage capacity and lubrication area by setting an annular oil storage groove, thereby reducing the frequency of oiling and improving the lubrication effect.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lubricating bushing, comprising a body portion, the body portion being an internally hollow cylinder, with a first oil guide groove on its outer circumference, and a plurality of oil guide holes within the first oil guide groove; a second oil guide groove on the inner wall of the body portion, with the guide holes penetrating the second oil guide groove; a plurality of annular oil storage grooves on the inner wall surface of the body portion, the plurality of oil storage grooves being arranged in ascending order of diameter, and the second oil guide groove passing through the oil storage grooves and communicating with them.
[0006] Preferably, the second oil guide groove and the first oil guide groove are disposed on the same radial plane of the body, and the oil guide hole is disposed through the body. This structural design makes the oil guiding path more direct, and the lubricating oil can be transferred more smoothly from the first oil guide groove to the second oil guide groove through the oil guide hole, further improving lubrication efficiency and reducing the loss of lubricating oil during the transmission process.
[0007] Preferably, the oil reservoirs are divided into several groups, and these groups of oil reservoirs are distributed along the length of the second oil guide groove. Grouping the oil reservoirs allows for a more even distribution of lubricating oil, resulting in more stable lubrication and preventing wear caused by insufficient lubrication in certain areas. It also helps optimize the spatial layout of the oil reservoirs and improve space utilization.
[0008] Preferably, the centers of several oil reservoirs in each group are all on the second guide groove, and the diameters of the oil reservoirs are distributed outwards from small to large. This ensures a more uniform distribution of lubricating oil within the oil reservoirs. As the diameter of the oil reservoirs gradually increases, the lubricating oil can more fully cover the friction surfaces, further improving the lubrication effect and reducing wear.
[0009] Preferably, several oil reservoirs are symmetrically arranged along the second oil guide groove. The symmetrical arrangement of the oil reservoirs ensures that the lubricating oil is evenly distributed during rotation, avoiding local overheating or wear caused by uneven lubricating oil distribution, and improving the service life and operational stability of the bushing.
[0010] Preferably, the several oil storage tanks are not interconnected, and the diameters of the oil storage tanks within each group are uniformly increased and nested together. The fact that the oil storage tanks are not interconnected prevents excessive flow of lubricating oil within the tanks, reducing lubricating oil waste.
[0011] Preferably, one end of the oil guide hole is located at the bottom of the first oil guide groove, and the other end is located at the bottom of the second oil guide groove. This arrangement makes the oil guide path of the oil guide hole more direct, allowing the lubricating oil to be transferred more efficiently from the first oil guide groove to the second oil guide groove, reducing the resistance of the lubricating oil during the transfer process, and improving lubrication efficiency.
[0012] Preferably, a plurality of oil guide holes are evenly distributed along the length of the second oil guide groove. The evenly distributed oil guide holes can ensure that the lubricating oil is distributed more evenly in the second oil guide groove, avoid wear caused by insufficient lubricating oil in some areas, and improve the overall lubrication effect of the bushing.
[0013] Preferably, the first and second oil guide grooves are annular and are disposed on the opposing inner and outer wall surfaces of the main body. This improves the comprehensiveness and stability of lubrication and reduces localized wear caused by uneven distribution of lubricating oil.
[0014] Preferably, the length of the outermost oil reservoir is less than the height of the main body. The length of the outermost oil reservoir is slightly less than the height of the main body, and both ends of the outermost oil reservoir are located near the two sides of the main body along its axis to ensure lubrication area.
[0015] Preferably, the main body is fitted onto the pin, with the inner wall of the main body in contact with the pin. A hydraulic cylinder is fitted onto the outer side of the main body, with the outer circumferential surface of the main body in contact with the hydraulic cylinder. The hydraulic cylinder has an oil injection channel, which is connected to the first oil guide groove, and an oil injection nozzle is provided at the opening of the oil injection channel. The oil injection nozzle injects solid lubricating oil into the first oil guide groove. The first oil guide groove not only serves to guide the oil but also to store some oil. The lubricating oil passes through the oil guide hole in the first oil guide groove, through the main body, and into the second oil guide groove. Since the second oil guide groove is connected to the oil storage groove, the pin rotates during rotation, causing the lubricating oil to spread throughout the oil storage groove. The several annular oil storage grooves have a larger contact area with the pin, resulting in better lubrication. Lubricating oil can be easily injected into the bushing through the oil inlet and oil nozzle of the hydraulic cylinder. The oil storage function of the first guide groove can further increase the storage capacity of lubricating oil and reduce the frequency of oiling. At the same time, the lubricating oil can be better distributed in the oil reservoir during the rotation of the pin shaft, improving the lubrication effect, reducing wear, and extending the service life of the bushing.
[0016] Beneficial effects: This utility model increases the oil storage capacity by setting an annular oil storage groove: the groove-shaped oil storage structure has a larger storage capacity, which can better store lubricating oil, reduce the frequency of refilling, and reduce labor costs. It also increases the lubrication area: the groove-shaped oil storage structure increases the contact area between the oil and the shaft, allowing for better lubrication. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] Figure 2 This is a cross-sectional view of the present invention.
[0019] Figure 3 This is a cross-sectional view of the present invention, the pin, and the hydraulic cylinder.
[0020] Reference numerals in the attached drawings: 1: Body part; 2: First oil guide groove; 3: Second oil guide groove; 4: Oil guide hole; 5: Oil reservoir; 6: Pin; 7: Hydraulic cylinder; 8: Oil injection nozzle; 9: Oil injection channel. Detailed Implementation
[0021] The bushing disclosed in this utility model effectively solves the problems of insufficient lubrication and frequent refilling of traditional bushings through its carefully designed oil guiding structure and oil reservoir 5 layout, significantly improving the lubrication effect and service life.
[0022] exist Figure 1In the illustrated embodiment, the bushing has a core body 1, which is a hollow cylindrical structure. This shape allows it to fit shaft-like parts, forming a sliding mating surface. A first oil guide groove 2 is provided on the outer circumference of the body 1, continuously distributed along the circumferential direction of the outer surface of the body 1, providing a channel for the injection of external lubricating oil. Several oil guide holes 3 are provided within the first oil guide groove 2, penetrating the wall of the body 1 to introduce external lubricating oil into the bushing. A second oil guide groove 3 is provided on the inner circumferential side of the body 1, and the second oil guide groove 3 is connected to the first oil guide groove 2 through the oil guide holes 3, forming a complete lubricating oil delivery path. The inner wall surface is also provided with several annular oil storage grooves 5. These oil storage grooves 5 are arranged in sequence with increasing diameter, like concentric circles. The second oil guide groove 3 passes through these oil storage grooves 5 and is connected to them. The second oil guide groove 3 passes through the center of several oil storage grooves 5, so that the lubricating oil can flow from the oil guide groove into each oil storage groove 5 for storage.
[0023] exist Figure 1 and Figure 2 In the preferred embodiment shown, the second oil guide groove 3 and the first oil guide groove 2 are disposed on the same radial plane of the body part 1, and the oil guide hole 3 penetrates through the body part 1. This structural design makes the transmission path of lubricating oil more direct. When external lubricating oil is injected into the first oil guide groove 2, it can pass vertically through the wall of the body part 1 through the oil guide hole 3 and directly enter the second oil guide groove 3. This reduces the detour of the lubricating oil during transmission, reduces flow resistance, makes the transmission of lubricating oil smoother and more efficient, reduces lubricating oil loss caused by excessively long paths, and ensures that more lubricating oil can reach the inner wall surface that needs lubrication. The oil guide hole 3 is preferably a circular hole, and the diameter direction of the oil guide hole 3 is perpendicular to the wall of the body part 1.
[0024] exist Figure 1 In the preferred embodiment shown, the two ends of the oil guide hole 3 are respectively located at the bottom of the first oil guide groove 2 and the second oil guide groove 3. This layout further optimizes the oil guiding efficiency. The lubricating oil in the first oil guide groove 2 will naturally accumulate at the bottom of the groove. The inlet of the oil guide hole 3 is located at the bottom of the groove to maximize the absorption of lubricating oil. Similarly, the outlet of the oil guide hole 3 is located at the bottom of the second oil guide groove 3, so that the lubricating oil entering falls directly into the lowest point of the second oil guide groove 3, which facilitates the diffusion and flow of lubricating oil in the second oil guide groove 3, avoids the waste of lubricating oil, and improves the utilization rate of lubricating oil.
[0025] exist Figure 1 and Figure 2In the preferred embodiment shown, several oil reservoirs 5 are divided into several groups, and the groups of oil reservoirs 5 are distributed along the length of the second oil guide groove 3. This grouping layout allows the lubricating oil to be evenly distributed at different axial positions on the inner wall of the bushing, avoiding the situation where the lubricating oil is concentrated in one area while other areas are insufficiently lubricated. For example, when the bushing rotates with the shaft, the friction surfaces at different axial positions need lubrication. The grouped oil reservoirs 5 can ensure that each area has sufficient lubricating oil reserves, thereby making the overall lubrication effect more stable. At the same time, it also optimizes the layout of the oil reservoirs 5 in a limited space and improves the space utilization rate. In this embodiment, each group of oil reservoirs 5 preferably has four oil reservoirs 5, and the second oil guide groove 3 is arranged through the four oil reservoirs 5, which increases the contact area between the oil reservoirs 5 and the pin 6.
[0026] exist Figure 1 and Figure 2 In the preferred embodiment shown, the centers of several oil reservoirs 5 in each group are all on the second oil guide groove 3, and their diameters are distributed outwards from small to large. This design allows the oil reservoirs 5 to be arranged radially around the second oil guide groove 3, so that when lubricating oil flows from the second oil guide groove 3 into the oil reservoir 5, it can be evenly distributed along the diffusion direction. As the diameter of the oil reservoir 5 gradually increases, the area of its inner wall also expands, allowing the lubricating oil to more fully cover the entire friction surface. Especially when the bushing and shaft rotate relative to each other, the friction surfaces at different radii can be effectively lubricated, further reducing wear.
[0027] exist Figure 1 and Figure 2 In the preferred embodiment shown, several oil reservoirs 5 are symmetrically arranged along the second oil guide groove 3. This symmetrical structure ensures that during the rotation of the bushing, the lubricating oil can be evenly distributed to the oil reservoirs 5 on both sides under the action of centrifugal force and the pin 6. Whether rotating clockwise or counterclockwise, the symmetrically distributed oil reservoirs 5 can ensure consistent lubrication on both sides, avoiding localized friction and temperature increases caused by uneven lubricating oil distribution, thereby improving the service life and operational stability of the bushing.
[0028] exist Figure 1 and Figure 2 In the preferred embodiment shown, the several oil reservoirs 5 are not interconnected, and the diameters of the oil reservoirs 5 within each group are uniformly increasing and nested together. This non-interconnected design prevents excessive flow of lubricating oil within the reservoirs, avoiding situations where one reservoir 5 has too much lubricating oil while others have insufficient oil. This ensures that each reservoir 5 maintains a certain amount of oil, reducing lubricating oil waste. The uniformly increasing diameter arrangement ensures that the capacity of the oil reservoirs 5 increases systematically with the increase in diameter, providing appropriate oil reserves according to the lubrication needs at different radii, resulting in more precise lubrication.
[0029] In actual use, the lubrication process of this bushing is efficient and stable. External lubricating oil is added to the first oil guide groove 2 through the grease nipple 8. Under pressure, the lubricating oil in the first oil guide groove 2 flows into the oil guide hole 3 at the bottom of the groove, and then directly into the bottom of the second oil guide groove 3. The lubricating oil entering the second oil guide groove 3 diffuses along the groove body and flows into the various oil storage grooves 5 connected to it. The oil storage grooves 5, according to their grouping and symmetrical layout, evenly distribute the lubricating oil to different areas of the inner wall of the bushing. When the bushing rotates relative to the shaft, the lubricating oil in the oil storage grooves 5 will gradually seep out under the action of friction, forming an oil film to continuously lubricate the friction surface. Because the oil storage grooves 5 have a large capacity and reasonable distribution, lubrication can be maintained for a long time after one filling, reducing the frequency of oiling.
[0030] The design advantages of this bushing are particularly evident in long-term use. The annular oil reservoir 5 significantly increases the oil storage capacity and lubrication area, ensuring that the friction surfaces are always well lubricated. The direct connection between the oil guide groove and the oil guide hole 3 ensures efficient oil transfer and reduces losses. The grouped, symmetrical, and non-connected layout of the oil reservoir 5 ensures uniform oil distribution and stable oil storage, effectively preventing localized wear and overheating. These features work together to significantly improve the bushing's lubrication effect, extend its service life, and reduce maintenance costs, making it suitable for various mechanical transmission scenarios requiring sliding fits.
[0031] exist Figure 1 and Figure 2 In the preferred embodiment shown, a plurality of oil guide holes 3 are evenly distributed along the length of the second oil guide groove 3. This layout ensures that the lubricating oil can be evenly diffused within the second oil guide groove 3. When the lubricating oil enters the second oil guide groove 3 from the first oil guide groove 2 through the oil guide holes 3, the evenly distributed oil guide holes 3 disperse the lubricating oil to each section of the second oil guide groove 3, preventing the lubricating oil from concentrating in a certain area. For example, if the oil guide holes 3 are concentrated in the middle of the second oil guide groove 3, it may result in insufficient lubricating oil at both ends. However, the evenly distributed oil guide holes 3 ensure that each section of the second oil guide groove 3 receives sufficient lubricating oil. Furthermore, through the connection between the second oil guide groove 3 and the oil reservoir 5, the lubricating oil is evenly distributed to each group of oil reservoirs 5, preventing wear caused by insufficient local lubrication and improving the overall lubrication effect of the bushing.
[0032] exist Figure 1 and Figure 2In the preferred embodiment shown, both the first oil guide groove 2 and the second oil guide groove 3 are annular and are respectively disposed on the inner and outer wall surfaces of the body portion 1. The annular design allows the oil guide grooves to extend continuously along the circumference of the body portion 1, covering the entire outer and inner circumferential surfaces, ensuring that the lubricating oil is distributed 360 degrees without dead angles. When external lubricating oil is injected into the annular first oil guide groove 2, the lubricating oil will diffuse along the circumference and then enter the annular second oil guide groove 3 through the evenly distributed oil guide holes 3. The second oil guide groove 3 is also distributed along the inner circumference, allowing the lubricating oil to be quickly transferred to each oil reservoir 5. This annular layout avoids the lubricating oil transfer blind spots caused by the segmentation of the oil guide grooves, improves the comprehensiveness of lubrication, reduces local wear caused by uneven lubricating oil distribution, and ensures that every contact surface between the bushing and the mating parts is effectively lubricated. Both the first oil guide groove 2 and the second oil guide groove 3 are disposed in the middle part of the height direction of the body portion 1.
[0033] exist Figure 1 and Figure 2 In the preferred embodiment shown, the outer oil reservoir 5 is designed to balance lubrication area and structural stability. The length of the outer oil reservoir 5 is slightly less than the height of the body 1, and both ends of it along the axis of the body 1 are close to the sides of the body 1. This design ensures that the oil reservoir 5 covers most of the inner wall surface while maintaining a certain degree of structural integrity at both ends of the body 1, preventing a decrease in the strength of the bushing ends due to excessive length of the oil reservoir 5. The outermost oil reservoir 5 has the largest diameter and the widest coverage area. Its placement near the ends allows the oil reservoir 5 to cover most of the contact surface between the bushing and the mating shaft from one end to the other, maximizing the lubrication area without affecting the overall structural strength of the bushing.
[0034] exist Figure 3 In the preferred embodiment shown, during actual assembly, the main body 1 of the bushing is fitted onto the pin 6, with its inner wall surface directly contacting the pin 6; a hydraulic cylinder 7 is fitted onto the outer side of the main body 1, with its outer circumferential surface contacting the inner wall of the hydraulic cylinder 7, forming a three-layer mating structure of "pin 6—bushing—hydraulic cylinder 7". The hydraulic cylinder 7 is provided with an oil injection channel 9, one end of which is connected to the first oil guide groove 2, and the other end is provided with an oil injection nozzle 8, which serves as the interface for external lubricant injection. The operator injects solid lubricant through the oil injection nozzle 8, and the lubricant flows into the first oil guide groove 2 along the oil injection channel 9. The annular first oil guide groove 2 not only serves as an oil guide but also temporarily stores a certain amount of lubricant, acting as a temporary oil depot. When further lubrication is needed, the stored lubricant in the first oil guide groove 2 can be transferred through the oil guide hole 3, reducing the need for frequent oil injection.
[0035] The lubricating oil transfer and distribution process is efficient and orderly. Solid lubricating oil enters the oil channel 9 through the grease nipple 8, then flows into the annular first oil guide groove 2, where it diffuses circumferentially. Subsequently, the lubricating oil passes through the body part 1 via the evenly distributed oil guide holes 3 and enters the annular second oil guide groove 3. The lubricating oil in the second oil guide groove 3 flows circumferentially and simultaneously flows into the connected sets of oil reservoirs 5. When the pin 6 rotates, its surface contacts the oil reservoirs 5 on the inner wall of the bushing, causing the lubricating oil in the oil reservoirs 5 to diffuse, forming a uniform oil film on the contact surface between the annular oil reservoirs 5 and the pin 6. Because multiple annular oil reservoirs 5 are nested with increasing diameters, the contact area with the pin 6 is significantly increased, allowing for more comprehensive coverage of the pin 6 surface and improving the lubrication effect.
[0036] In this assembly structure, the fit between the bushing and external components ensures convenient and continuous lubrication. The grease nipple 8 on the hydraulic cylinder 7 allows for lubrication without disassembling parts, reducing maintenance difficulty; the oil storage function of the first oil guide groove 2 reduces the frequency of lubrication, saving labor costs. The rotation of the pin 6 drives the lubricating oil, ensuring a continuous supply of lubricating oil from the oil reservoir 5 to the friction surface. Even after prolonged operation, the stored lubricating oil in the oil reservoir 5 maintains lubrication effectiveness, reducing wear caused by insufficient lubrication and extending the service life of the bushing and pin 6.
[0037] This invention constructs a highly efficient lubrication system through the uniform distribution of oil guide holes 3, the complete coverage of the annular oil guide groove, the optimized size of the outer oil storage tank 5, and its cooperation with the pin 6 and hydraulic cylinder 7. After being injected through the grease nipple 8, the lubricating oil is transferred through the annular oil guide groove and the uniformly distributed oil guide holes 3, then evenly distributed through the grouped oil storage tanks 5, ultimately forming a comprehensive oil film when the pin 6 rotates. This design increases the oil storage capacity and lubrication area, reduces the frequency of oiling, lowers labor costs, and simultaneously reduces wear through comprehensive lubrication, extending the service life of components, fully demonstrating the advantages of the grooved oil storage structure in lubrication performance.
Claims
1. A lubricating bushing, characterized in that, It includes a main body, which is a hollow cylinder with a first oil guide groove on its outer periphery and a number of oil guide holes inside the first oil guide groove. The inner wall of the main body is provided with a second oil guide groove in the circumferential direction. The guide hole passes through the second oil guide groove. Several annular oil storage grooves are provided on the inner wall surface of the main body. The diameter of the oil storage grooves is arranged in ascending order. The second oil guide groove passes through the oil storage grooves and communicates with them.
2. A lubricating bushing according to claim 1, characterized in that, The second oil guide groove and the first oil guide groove are located on the same radial surface of the main body, and the oil guide hole is provided through the main body.
3. A lubricating bushing according to claim 1, characterized in that, Several oil storage tanks are divided into several groups, and the groups of oil storage tanks are distributed along the length of the second oil guide channel.
4. A lubricating bushing according to claim 1 or 3, characterized in that, The centers of several oil storage tanks in each group are all on the second guide channel, and the diameters of the oil storage tanks are distributed outwards from small to large.
5. A lubricating bushing according to claim 1 or 3, characterized in that, Several oil storage tanks are symmetrically arranged along the second oil guide channel.
6. A lubricating bushing according to claim 5, characterized in that, Several oil storage tanks are not connected to each other, and the diameters of the oil storage tanks in each group are uniformly increased and nested together.
7. A lubricating bushing according to claim 1 or 2, characterized in that, One end of the oil guide hole is located at the bottom of the first oil guide groove, and the other end is located at the bottom of the second oil guide groove.
8. A lubricating bushing according to claim 7, characterized in that, Several oil guide holes are evenly distributed along the length of the second oil guide groove.
9. A lubricating bushing according to claim 7, characterized in that, The first and second oil guide grooves are annular and are located on the opposite inner and outer walls of the main body.
10. A lubricating bushing according to claim 6, characterized in that, The length of the outer oil storage tank is less than the height of the main body.