An oil-fillable spherical bearing

Abstract

This utility model belongs to the field of spherical plain bearing technology, specifically an oil-fillable spherical plain bearing, including a rod body. An outer bearing ring is provided at the upper end of the rod body, and an inner bearing ring is rotatably connected inside the outer bearing ring. An oil-filling structure is installed on the outer bearing ring, and a filter structure is installed on the oil-filling structure. Through the oil-filling structure design, the problems of existing oil-fillable spherical plain bearings having multiple sets of oil reservoirs and sealing caps on the outside, requiring opening multiple sealing caps for multi-point oiling, are solved, making the oiling method cumbersome. The multiple sets of oil reservoirs and sealing caps also increase the production cost of the bearing, resulting in a better performance of the oil-fillable spherical plain bearing. Furthermore, the filter structure design solves the problem of the fixed filter screen in existing oil-fillable spherical plain bearings, which is inconvenient for cleaning impurities and replacing the filter screen, thereby improving the filtration effect of the filter screen.

Description

Technical Field

[0001] This utility model relates to the field of spherical bearing technology, specifically an oil-fillable spherical bearing. Background Technology

[0002] Spherical plain bearings are a type of spherical sliding bearing. Their sliding contact surfaces consist of an inner spherical surface and an outer spherical surface, allowing for rotation and oscillation at any angle during operation. They are manufactured using various special processes such as surface phosphating, burring, padding, and spraying. Spherical plain bearings are characterized by high load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning properties, and good lubrication. During long-term use, the connection between the bearing housing and the inner ring needs to be filled with lubricant to increase the flexibility of bearing rotation and reduce wear between the housing and the inner ring.

[0003] Chinese utility model patent CN220791774U discloses an oil-fillable spherical plain bearing, including a rod body and an outer bearing ring. An inner bearing ring is rotatably connected to the outer bearing ring. One end of the rod body is fixedly connected to the outer bearing ring, and the other end extends outward. An oil reservoir is provided on the outer surface of the outer bearing ring for storing lubricating oil, and an oil inlet is provided at the end of the oil reservoir away from the outer bearing ring. This design, with its oil reservoir and inlet, effectively stores lubricating oil, facilitating timely refilling. However, this existing oil-fillable spherical plain bearing has multiple sets of oil reservoirs and sealing caps on its exterior, requiring the opening of multiple sealing caps for multi-point refilling, which is cumbersome. The multiple sets of oil reservoirs and sealing caps also increase the bearing's production cost. Furthermore, the filter screen of this existing oil-fillable spherical plain bearing is fixed, making it inconvenient to clean impurities and replace the filter screen.

[0004] Therefore, an oil-fillable spherical bearing is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, existing oilable spherical plain bearings have multiple sets of oil reservoirs and sealing caps on the outside, requiring the opening of multiple sealing caps for multi-point oiling, which is cumbersome. The multiple sets of oil reservoirs and sealing caps also increase the production cost of the bearings. In addition, the filter screen of existing oilable spherical plain bearings is fixed, which makes it inconvenient to clean impurities and replace the filter screen. This utility model proposes an oilable spherical plain bearing.

[0006] The technical solution adopted by this utility model to solve its technical problem is: an oil-fillable spherical bearing, including a rod body, an outer bearing ring provided at the upper end of the rod body, an inner bearing ring rotatably connected inside the outer bearing ring, an oil-filling structure installed on the outer bearing ring, and a filter screen structure installed on the oil-filling structure;

[0007] The oil injection structure includes an oil injection hole and an oil injection port on the outer ring of the bearing. The oil injection hole and the oil injection port are connected to rolling balls. An annular groove is provided on the outer ring of the bearing. An oil storage box is installed on the outer wall of the outer ring of the bearing and corresponding to the oil injection port. A box cover is provided at the upper port of the oil storage box. Two sets of bolts are provided on the front and rear side walls of the box cover through connecting holes.

[0008] Preferably, the filter structure includes two sets of vertical plates and two sets of baffles rotatably connected to the oil storage box. Filter plates are installed on the corresponding side walls of the two sets of vertical plates. The filter structure also includes two sets of springs. A connecting plate is provided at one end of each spring. A limit rod and a pull rod are provided on the outer wall of the connecting plate at the end away from the spring.

[0009] Preferably, at least three sets of oil injection holes are provided, respectively located on the left and right sides of the outer ring of the bearing and on the lower side of the outer ring of the bearing, and the annular groove is connected to the oil injection hole and the oil injection port respectively.

[0010] Preferably, the lower side of the rod body is provided with a first threaded hole, and the outer ring of the bearing is provided with a guide groove that communicates with the oil injection port.

[0011] Preferably, a rubber ring is installed on the inner end face of the cover, and a second threaded hole is opened on the oil storage box corresponding to the bolt, and the ball is in rolling connection with the inner ring of the bearing.

[0012] Preferably, the inner cavity of the oil storage box is symmetrically provided with vertical grooves, the oil storage box is slidably connected to the vertical plate through the vertical grooves, the side wall of the vertical plate is equipped with a fixing column, the inner cavity of the oil storage box is symmetrically provided with receiving grooves, the oil storage box is equipped with a support shaft through the receiving grooves, the stop rod is rotatably connected to the support shaft through a connecting hole, and the other end of the stop rod is provided with an insertion hole.

[0013] Preferably, the oil storage box has symmetrical I-shaped grooves, the oil storage box is connected to the end of the spring away from the connecting plate through the lower side of the I-shaped groove, the oil storage box is slidably connected to the connecting plate through the lower side of the I-shaped groove, and the upper end of the pull rod extends to the upper side of the I-shaped groove.

[0014] Preferably, the filter screen is adapted to the inner cavity of the oil storage box, and a fixing frame is installed in the inner cavity of the oil storage box at the bottom of the oil storage box.

[0015] The advantages of this utility model are:

[0016] 1. This utility model, through its oil-filling structure design, allows lubricating oil to be added into a single oil reservoir. The lubricating oil flows into the oil inlet and then into the annular groove. The lubricating oil is applied to multiple points on the outer wall of the inner ring of the bearing through multiple sets of oil inlets and outlets. Moreover, only one set of oil reservoir and cover is required, which reduces the production cost of the bearing. This solves the problem that existing oil-fillable spherical plain bearings have multiple sets of external oil reservoirs and sealing covers, requiring the opening of multiple sealing covers for multi-point oiling, which is cumbersome. The addition of multiple sets of oil reservoirs and sealing covers increases the production cost of the bearing. This makes the oil-filled spherical plain bearing perform better in use.

[0017] 2. This utility model, through its filter structure design, utilizes vertical plates, baffles, springs, limiting rods, and pull rods to achieve quick assembly and disassembly of the filter screen. This facilitates the cleaning of impurities from the filter screen surface and the replacement of the filter screen, solving the problem that existing oil-lubricated spherical bearing filters are fixed and inconvenient for cleaning impurities and replacing the filter screen, thereby improving the filtration effect of the filter screen. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a partial cross-section and structural diagram of the present invention;

[0022] Figure 4 This is a cross-sectional view of the oil storage box of this utility model;

[0023] Figure 5 This is an enlarged structural diagram of point A in this utility model;

[0024] Figure 6 This is a cross-sectional view of the oil storage box and a disassembled view of the filter structure of this utility model.

[0025] In the diagram: 1. Rod body; 11. First threaded hole; 12. Guide groove; 2. Bearing outer ring; 3. Bearing inner ring; 4. Oil filling structure; 41. Oil filling hole; 42. Ball; 43. Annular groove; 44. Oil reservoir; 441. Second threaded hole; 442. Vertical groove; 443. I-shaped groove; 444. Receiving groove; 45. Cover; 451. Rubber ring; 46. Bolt; 47. Oil filling port; 5. Filter structure; 51. Vertical plate; 511. Fixing column; 52. Stop bar; 521. Support shaft; 522. Insertion hole; 53. Filter screen plate; 54. Spring; 55. Connecting plate; 56. Limiting rod; 57. Pull rod; 6. Fixing frame. Detailed Implementation

[0026] 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 scope of protection of the present utility model.

[0027] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0028] This application discloses an oil-fillable spherical plain bearing. (See also...) Figure 1-6 An oil-fillable spherical bearing includes a rod body 1, an outer bearing ring 2 at the upper end of the rod body 1, an inner bearing ring 3 rotatably connected inside the outer bearing ring 2, an oil filling structure 4 installed on the outer bearing ring 2, and a filter screen structure 5 installed on the oil filling structure 4.

[0029] The oil filling structure 4 includes an oil filling hole 41 and an oil filling port 47 on the outer ring 2 of the bearing. The oil filling hole 41 and the oil filling port 47 are internally connected with rolling balls 42. The outer ring 2 of the bearing has an annular groove 43. An oil reservoir 44 is installed on the outer wall of the outer ring 2 corresponding to the oil filling port 47. The upper port of the oil reservoir 44 is provided with a cover 45. The front and rear side walls of the cover 45 are provided with two sets of bolts 46 through connecting holes. Through the design of the oil filling structure 4, the problem of the existing oilable spherical plain bearings having multiple sets of oil reservoirs and sealing covers on the outside, requiring multiple sets of sealing covers to be opened for multi-point oiling, is solved. The oiling method is relatively cumbersome, and the setting of multiple sets of oil reservoirs and sealing covers increases the production cost of the bearing.

[0030] Reference Figure 2 , Figure 4 , Figure 5 and Figure 6The filter structure 5 includes two sets of vertical plates 51 and two sets of baffles 52 rotatably connected to the oil storage box 44. Filter plates 53 are installed on the corresponding side walls of the two sets of vertical plates 51. The filter structure 5 also includes two sets of springs 54. A connecting plate 55 is provided at one end of the spring 54. A limit rod 56 and a pull rod 57 are provided on the outer wall of the connecting plate 55 away from the spring 54. At least three sets of oil injection holes 41 are provided, respectively on the left and right sides and the lower side of the outer ring 2 of the bearing. The annular groove 43 is connected to the oil injection hole 41 and the oil injection port 47, respectively. A first threaded hole 11 is opened on the lower side of the rod body 1, and a guide groove 12 is opened on the outer ring 2 of the bearing that is connected to the oil injection port 47.

[0031] Among them, through the setting of the guide groove 12, lubricating oil is injected into the oil storage box 44. The lubricating oil will flow into the oil filling port 47 after flowing into the guide groove 12, which facilitates the injection of lubricating oil into the oil filling port 47 and the annular groove 43.

[0032] Reference Figure 2 , Figure 3 and Figure 4 A rubber ring 451 is installed on the inner end face of the box cover 45, and a second threaded hole 441 is opened on the oil storage box 44 corresponding to the bolt 46. The ball 42 is in rolling connection with the inner ring 3 of the bearing.

[0033] Among them, by setting the rubber ring 451, when the cover 45 and the oil storage box 44 are connected, the rubber ring 451 is installed at the connection between the inner cavity end face of the cover 45 and the upper end of the oil storage box 44, which can increase the sealing of the oil storage box 44 and avoid oil leakage.

[0034] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6 The inner cavity of the oil storage box 44 is symmetrically provided with vertical grooves 442. The oil storage box 44 is slidably connected to the vertical plate 51 through the vertical grooves 442. A fixing post 511 is installed on the side wall of the vertical plate 51. The inner cavity of the oil storage box 44 is symmetrically provided with receiving grooves 444. A support shaft 521 is installed in the oil storage box 44 through the receiving grooves 444. A stop rod 52 is rotatably connected to the support shaft 521 through a connecting hole. The other end of the stop rod 52 is provided with an insertion hole 522. The upper part of the oil storage box 44 is symmetrically provided with I-shaped grooves 443. The lower side of the oil storage box 44 is connected to the end of the spring 54 away from the connecting plate 55 through the lower side of the I-shaped groove 443. The oil storage box 44 is slidably connected to the connecting plate 55 through the lower side of the I-shaped groove 443. The upper end of the pull rod 57 extends to the upper side of the I-shaped groove 443. The filter screen plate 53 is adapted to the inner cavity of the oil storage box 44. A fixing frame 6 is installed in the inner cavity of the oil storage box 44 and at the bottom of the oil storage box 44.

[0035] With the setting of the fixed frame 6, when the oil storage box 44 adds oil, there will be an impact force on the filter screen plate 53. The filter screen plate 53 is placed on the upper end of the fixed frame 6, and the fixed frame 6 provides support for the filter screen plate 53, which can improve the installation stability of the filter screen plate 53.

[0036] Working principle: The cover 45 is fixed to the oil reservoir 44 by bolts 46, making the cover 45 firmly installed and not easy to open, which would cause lubricating oil leakage. When adding oil, the operator removes multiple sets of bolts 46, then removes the cover 45, and adds lubricating oil to a single oil reservoir 44. The lubricating oil flows through the guide groove 12 into the oil inlet 47, and then from the oil inlet 47 into the annular groove 43. After flowing through the annular groove 43, it flows to multiple sets of oil inlets 41. At this time, the oil inlet 47 and the multiple sets of oil inlets 41 are filled with lubricating oil. Ball bearings in the oil inlets 41 and oil inlets 47... When the inner ring 3 of the bearing is rolled together with the outer ring of the inner ring 3, the inner ring 3 of the bearing can be lubricated. Only one cover 45 needs to be opened to lubricate the oil reservoir 44, which can achieve multi-point lubrication of the inner ring 3 of the bearing. Moreover, only one set of oil reservoir 44 and cover 45 is set, which reduces the production cost of the bearing. It solves the problem that the existing lubricated spherical plain bearings have multiple sets of oil reservoirs and sealing covers on the outside, which require opening multiple sets of sealing covers to lubricate multiple points. The lubrication method is more cumbersome, and the multiple sets of oil reservoirs and sealing covers increase the production cost of the bearing. The lubricated spherical plain bearing has a better performance.

[0037] When disassembling the filter screen 53, drive the two sets of pull rods 57 to move away from the stop rod 52 and compress the spring 54, causing the pull rods 57 to move down with the connecting plate 55, and also moving the limit rod 56 out of the insertion hole 522. Then, after rotating the stop rod 52 180 degrees, the stop rod 52 rotates into the front receiving groove 444 of the support shaft 521. Then, lift the two sets of fixing columns 511 by hand, and the fixing columns 511, along with the vertical plates 51, slide upward from the vertical groove 442. The two sets of vertical plates 51, along with the filter screen 53, are then removed. This makes it convenient to clean the impurities on the surface of the filter screen 53. If the filter screen 53 is severely clogged or damaged, a new filter screen 53 and vertical plates 51 can be replaced. During installation, the operation is reversed. The two sets of vertical plates 51 drive the filter screen 53 into place. The filter screen 53 is installed in the inner cavity of the oil storage box 44, and the vertical plate 51 slides into the vertical groove 442. The driving connecting plate 55, along with the limiting rod 56, presses the pull rod 57, causing the stop rod 52 to rotate 180 degrees in the opposite direction and return to the end face of the vertical plate 51. Then, the pull rod 57 is released, and under the reset action of the spring 54, the limiting rod 56 is pushed in the opposite direction into the insertion hole 522, thereby realizing the installation of the filter screen 53. The filter screen structure 5 enables the quick installation and removal of the filter screen 53, facilitating the cleaning of impurities on the surface of the filter screen 53 and the replacement of the filter screen 53. This solves the problem that the filter screen of the existing oil-fillable spherical bearing is fixed, making it inconvenient to clean impurities and replace the filter screen, thereby improving the filtration effect of the filter screen 53.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An oil-lubricated spherical bearing, comprising a rod (1), characterized in that: The upper end of the rod (1) is provided with a bearing outer ring (2), and the bearing outer ring (2) is rotatably connected to the bearing inner ring (3). An oil injection structure (4) is installed on the bearing outer ring (2), and a filter screen structure (5) is installed on the oil injection structure (4). The oil filling structure (4) includes an oil filling hole (41) and an oil filling port (47) on the outer ring (2) of the bearing. The oil filling hole (41) and the oil filling port (47) are connected by rolling balls (42). The outer ring (2) of the bearing is provided with an annular groove (43). An oil storage box (44) is installed on the outer wall of the outer ring (2) and corresponding to the oil filling port (47). The upper port of the oil storage box (44) is provided with a box cover (45). The front and rear side walls of the box cover (45) are provided with two sets of bolts (46) through connecting holes.

2. The oil-fillable spherical plain bearing according to claim 1, characterized in that: The filter structure (5) includes two sets of vertical plates (51) and two sets of baffles (52) rotatably connected to the oil storage box (44). Filter plates (53) are installed on the corresponding side walls of the two sets of vertical plates (51). The filter structure (5) also includes two sets of springs (54). A connecting plate (55) is provided at one end of the spring (54). A limit rod (56) and a pull rod (57) are provided at the end of the connecting plate (55) away from the spring (54).

3. The oil-fillable spherical plain bearing according to claim 1, characterized in that: At least three sets of oil injection holes (41) are provided, and are respectively provided on the left and right sides of the bearing outer ring (2) and the lower side of the bearing outer ring (2). The annular groove (43) is connected to the oil injection hole (41) and the oil injection port (47) respectively.

4. The oil-fillable spherical plain bearing according to claim 1, characterized in that: The rod body (1) has a first threaded hole (11) on its lower side, and the bearing outer ring (2) has a guide groove (12) that communicates with the oil injection port (47).

5. The oil-fillable spherical plain bearing according to claim 1, characterized in that: A rubber ring (451) is installed on the inner end face of the cover (45), and a second threaded hole (441) is opened on the oil storage box (44) corresponding to the bolt (46). The ball (42) is in rolling connection with the inner ring (3) of the bearing.

6. The oil-fillable spherical plain bearing according to claim 2, characterized in that: The inner cavity of the oil storage box (44) is symmetrically provided with vertical grooves (442). The oil storage box (44) is slidably connected to the vertical plate (51) through the vertical grooves (442). The side wall of the vertical plate (51) is equipped with a fixing column (511). The inner cavity of the oil storage box (44) is symmetrically provided with receiving grooves (444). The oil storage box (44) is equipped with a support shaft (521) through the receiving grooves (444). The stop rod (52) is rotatably connected to the support shaft (521) through the connecting hole. The other end of the stop rod (52) is provided with a plug hole (522).

7. The oil-fillable spherical plain bearing according to claim 2, characterized in that: The oil storage box (44) is symmetrically provided with I-shaped grooves (443). The oil storage box (44) is connected to the end of the spring (54) away from the connecting plate (55) through the lower side of the I-shaped groove (443). The oil storage box (44) is slidably connected to the connecting plate (55) through the lower side of the I-shaped groove (443). The upper end of the pull rod (57) extends to the upper side of the I-shaped groove (443).

8. The oil-fillable spherical plain bearing according to claim 2, characterized in that: The filter screen (53) is adapted to the inner cavity of the oil storage box (44), and a fixing frame (6) is installed in the inner cavity of the oil storage box (44) and at the bottom of the oil storage box (44).

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