A bearing internal grease injection device

Abstract

This utility model relates to the field of bearing grease injection technology, and more particularly to a bearing internal grease injection device, including a frame, a sealing assembly, a positioning assembly, and a filling assembly. The frame includes a base, a vertical plate, and a top plate. A mounting plate is provided in the middle of the front end face of the vertical plate, and a positioning hole is provided in the middle of the mounting plate. A bearing to be greased is provided on the upper end face of the mounting plate, corresponding to the positioning hole. The sealing assembly includes a servo motor, a screw, an upper sealing plate, and a lower sealing plate. The servo motor is located on the top plate. Both the upper and lower sealing plates are threadedly connected to the screw, with the upper sealing plate located above the mounting plate and the lower sealing plate located below the mounting plate. The servo motor drives both the upper and lower sealing plates to move towards the bearing, sealing both ends of the bearing. The positioning assembly clamps the bearing when the upper sealing plate moves downward. The filling assembly fills the bearing internally with grease when the lower sealing plate seals the lower end face of the bearing. This utility model effectively improves bearing grease injection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bearing grease injection technology, and in particular to a bearing internal grease injection device. Background Technology

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during their movement, and ensure their rotational accuracy.

[0003] After the bearing is assembled, it needs to be filled with grease. The current bearing grease filling process is a production line type. Usually, grease is filled at the bottom of the bearing and then the bearing is flipped over. Then, grease is filled at the top of the bearing. This method has low grease filling efficiency, there is a risk that the grease will leak out from inside the bearing, and during the bearing flipping process, grease is easy to drip onto the production line, affecting the production environment. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a bearing internal grease injection device.

[0005] This utility model provides the following technical solution: a bearing internal grease injection device, including a frame, a sealing assembly, a positioning assembly, and an injection assembly. The frame includes a base, a vertical plate, and a top plate. The vertical plate is connected to the rear end of the upper surface of the base, and the top plate is connected to the upper end of the front surface of the vertical plate. A mounting plate is provided in the middle of the front surface of the vertical plate, and a positioning hole is provided in the middle of the mounting plate. A bearing to be greased is provided on the upper surface of the mounting plate, corresponding to the positioning hole. The diameter of the positioning hole is consistent with the inner diameter of the outer ring of the bearing. The sealing assembly includes a servo motor, a screw, an upper sealing plate, and a lower sealing plate. The servo motor is mounted on the top plate, and the upper end of the screw penetrates through the top plate. The screw is connected to the servo motor, and its lower end passes through the mounting plate and connects to the base. The upper sealing plate and the lower sealing plate are both threadedly connected to the screw, with the upper sealing plate located above the mounting plate and the lower sealing plate located below the mounting plate. The servo motor drives the upper and lower sealing plates to move toward the bearing and close the upper and lower ends of the bearing. The locking assembly is connected to the upper sealing plate and is used to clamp the bearing when the upper sealing plate moves downward. The filling assembly is connected to the lower sealing plate and is used to fill the bearing with grease when the lower sealing plate closes the lower end face of the bearing.

[0006] This utility model discloses a bearing internal grease injection device. By setting an upper and lower sealing plate and cooperating with the drive of a servo motor, the upper and lower ends of the bearing on the mounting plate can be sealed off. Then, the grease is injected into the bearing using the injection component, achieving one-time injection without the need to flip the bearing or cause grease leakage. This effectively improves grease injection efficiency and ensures a hygienic production environment. By setting a locking component, the bearing on the mounting plate can be locked in place, ensuring that it is precisely above the positioning hole. Only then can the upper and lower sealing plates effectively seal the upper and lower ends of the bearing, ensuring stable operation of the equipment.

[0007] Furthermore, the screw is provided with a positive thread and a reverse thread, the upper sealing plate is connected to the positive thread, and the lower sealing plate is connected to the reverse thread.

[0008] Furthermore, the screw is provided in two parts, located on both sides of the rear end of the bearing. The top plate is provided with two servo motors. The rear end of the upper sealing plate is provided with two first extension side plates, which are respectively connected to the positive threads on the two screws. The rear end of the lower sealing plate is provided with two second extension side plates, which are respectively connected to the reverse threads on the two screws.

[0009] Furthermore, the upper sealing plate has a first extended rear plate at the middle of its rear end, and the front end of the upright plate has a vertical first sliding groove. The rear end of the first extended rear plate is adapted to the first sliding groove, and the rear end of the first extended rear plate is embedded in the first sliding groove and slidably connected to the first sliding groove. The lower sealing plate has a second extended rear plate at the middle of its rear end, and the rear end of the second extended rear plate is adapted to the first sliding groove. The rear end of the second extended rear plate is embedded in the first sliding groove and slidably connected to the first sliding groove.

[0010] Furthermore, the lower end face of the upper sealing plate is provided with a first protruding ring, which is adapted to the gap between the inner and outer rings of the bearing. The upper end face of the lower sealing plate is provided with a second protruding ring, which is adapted to the gap between the inner and outer rings of the bearing. The second protruding ring is uniformly provided with a plurality of filling holes, and the filling assembly is connected to the filling holes.

[0011] Furthermore, the positioning assembly is provided in two sets, with the two sets of positioning assemblies located on both sides of the bearing. Each positioning assembly includes a connecting plate, a roller, a connecting plate, a push plate, and a positioning plate. The connecting plate has a "7"-shaped cross-section. The transverse section of the connecting plate connects to the side wall of the upper sealing plate. The vertical section of the connecting plate has a first through groove running from front to back, and the lower end of the vertical section of the connecting plate is bent away from the bearing. The first through groove is adapted to the vertical section of the connecting plate. The roller runs through the first through groove from front to back. The mounting plate has two through slots that extend vertically through the bearing. The second through slots are located on both sides of the bearing. The positioning plate is located at the upper end of the second through slot. The upper end of the push plate passes through the second through slot and is connected to the positioning plate. The push plate is slidably connected to the second through slot. There are two connecting plates. Both ends of the roller are connected to the connecting plate. The other end of the connecting plate is connected to the lower end of the push plate. The positioning plate has a positioning slot on the side near the bearing that is adapted to the side wall of the bearing.

[0012] Furthermore, the top of the vertical section of the connecting plate is provided with a sliding rod, and the front end face of the upright plate is provided with second sliding grooves on both sides. The sliding rod extends backward and is embedded in the second sliding groove. The sliding rod is adapted to the second sliding groove and slidably connected with it.

[0013] Furthermore, a third through groove is provided at the position corresponding to the push plate on the front end face of the upright plate. The rear end of the push plate extends rearward and passes through the third through groove. The part of the push plate embedded in the third through groove is adapted to the third through groove. The height of the part of the push plate protruding from the third through groove is greater than the height of the third through groove. The push plate and the third through groove are slidably connected.

[0014] Furthermore, the filling assembly includes a mounting plate, filling needles, a connecting main pipe, and multiple connecting branch pipes. The mounting plate is located directly below the lower sealing plate. The mounting plate and the lower sealing plate are connected by a telescopic cylinder. The filling needles are evenly distributed on the upper surface of the mounting plate. The filling needles correspond vertically to the filling holes and are embedded in the filling holes. The upper end of the connecting branch pipe passes through the mounting plate and communicates with the filling needles. The lower end of the connecting branch pipe communicates with the connecting main pipe. One end of the connecting main pipe communicates with the grease storage tank. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0016] Figure 1 This is a schematic diagram of the internal grease injection device for bearings according to this utility model;

[0017] Figure 2 This is a schematic diagram of the frame structure in the bearing internal grease injection device of this utility model;

[0018] Figure 3 This is a schematic diagram showing the cooperation between the sealing component and the locking component in the bearing internal grease injection device of this utility model;

[0019] Figure 4 for Figure 3 A magnified schematic diagram of part A in the middle;

[0020] Figure 5 This is a schematic diagram of the mounting plate in the bearing internal grease injection device of this utility model;

[0021] Figure 6 This is a schematic diagram of the overhead structure of the upper sealing plate in the bearing internal grease injection device of this utility model.

[0022] Figure 7 This is a schematic diagram of the filling component in the bearing internal grease injection device of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Bearing; 10. Frame; 11. Base; 12. Vertical plate; 13. Top plate; 14. Mounting plate; 141. Positioning hole; 142. Second through groove; 15. First slide groove; 16. Second slide groove; 17. Third through groove; 20. Sealing assembly; 21. Servo motor; 22. Screw; 221. Positive thread; 222. Reverse thread; 23. Upper sealing plate; 231. First extended side plate; 232. First extended rear plate; 233. First convex ring; 24. 241. Lower sealing plate; 242. Second extended side plate; 243. Second extended rear plate; 244. Second protruding ring; 245. Filling hole; 30. Positioning assembly; 31. Connecting plate; 311. First through groove; 312. Slide rod; 32. Roller; 33. Connecting plate; 34. Push plate; 35. Positioning plate; 351. Positioning groove; 40. Filling assembly; 41. Mounting plate; 42. Filling needle; 43. Connecting main pipe; 44. Connecting branch pipe; 45. Telescopic cylinder. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] Reference Figures 1 to 7In one embodiment of this utility model, a bearing internal grease injection device includes a frame 10, a sealing assembly 20, a positioning assembly 30, and an injection assembly 40. The frame 10 includes a base 11, a vertical plate 12, and a top plate 13. The vertical plate 12 is connected to the rear end of the upper surface of the base 11, and the top plate 13 is connected to the upper end of the front surface of the vertical plate 12. A mounting plate 14 is provided in the middle of the front surface of the vertical plate 12, and a positioning hole 141 is provided in the middle of the mounting plate 14. A bearing 1 to be greased is provided on the upper surface of the mounting plate 14, corresponding to the positioning hole 141. The diameter of the positioning hole 141 is consistent with the inner diameter of the outer ring of the bearing 1. The sealing assembly 20 includes a servo motor 21, a screw 22, an upper sealing plate 23, and a lower sealing plate 24. The servo motor 21 is located on the top plate. On plate 13, the upper end of screw 22 passes through top plate 13 and is connected to servo motor 21, and the lower end of screw 22 passes through mounting plate 14 and is connected to base 11. Upper sealing plate 23 and lower sealing plate 24 are both threadedly connected to screw 22, with upper sealing plate 23 located above mounting plate 14 and lower sealing plate 24 located below mounting plate 14. Servo motor 21 is used to drive upper sealing plate 23 and lower sealing plate 24 to move toward bearing 1 and close the upper and lower ends of bearing 1. Clamping assembly 30 is connected to upper sealing plate 23 and is used to clamp bearing 1 when upper sealing plate 23 moves down. Filling assembly 40 is connected to lower sealing plate 24 and is used to fill bearing 1 with grease when lower sealing plate 24 closes the lower end face of bearing 1.

[0030] The bearing internal grease injection device of this utility model, by setting an upper sealing plate 23 and a lower sealing plate 24, and cooperating with the drive of the servo motor 21, can seal the upper and lower ends of the bearing 1 on the mounting plate 14. Then, the grease injection component 40 is used to inject grease into the bearing 1, realizing one-time injection without flipping the bearing 1 and without grease leakage, effectively improving grease injection efficiency and ensuring a hygienic production environment. By setting a locking component 30, the bearing 1 on the mounting plate 14 can be locked, so that it is precisely at the upper end of the positioning hole 141. Only then can the upper sealing plate 23 and the lower sealing plate 24 play the role of sealing the upper and lower ends of the bearing 1, ensuring that the equipment can operate stably.

[0031] The screw 22 is provided with a positive thread 221 and a reverse thread 222. The upper sealing plate 23 is connected to the positive thread 221, and the lower sealing plate 24 is connected to the reverse thread 222. Since the threads are opposite, when the servo motor 21 is started, the upper sealing plate 23 and the lower sealing plate 24 will move towards each other, thereby achieving the effect of sealing the upper and lower ends of the bearing 1. In this embodiment, the cooperation between the servo motor 21 and the screw 22 is similar to the principle of a lead screw, which will not be elaborated here.

[0032] Two screws 22 are provided, located on both sides of the rear end of the bearing 1. Two servo motors 21 are provided on the top plate 13. Two first extension side plates 231 are provided at the rear end of the upper sealing plate 23. The two first extension side plates 231 are connected to the positive threads 221 on the two screws 22 respectively. Two second extension side plates 241 are provided at the rear end of the lower sealing plate 24. The two second extension side plates 241 are connected to the reverse threads 222 on the two screws 22 respectively. By setting two sets of servo motors 21 and screws 22, and cooperating with the first extension side plates 231 and the second extension side plates 241, the upper sealing plate 23 and the lower sealing plate 24 are made to move more smoothly and are less prone to shaking.

[0033] The upper sealing plate 23 has a first extended rear plate 232 at its rear center, and the front face of the upright plate 12 has a vertical first sliding groove 15. The rear end of the first extended rear plate 232 is adapted to the first sliding groove 15, and the rear end of the first extended rear plate 232 is embedded in the first sliding groove 15 and slidably connected to it. The lower sealing plate 24 has a second extended rear plate 242 at its rear center, and the rear end of the second extended rear plate 242 is adapted to the first sliding groove 15. The rear end of the second extended rear plate 242 is embedded in the first sliding groove 15. 5. It is slidably connected to the first slide groove 15. By setting the first slide groove 15, and then setting the first extended rear plate 232 and the second extended rear plate 242 that are adapted to and slidably connected to the first slide groove 15, the upper sealing plate 23 and the lower sealing plate 24 are further supported and limited, which further improves the stability of the movement of the upper sealing plate 23 and the lower sealing plate 24 and avoids misalignment with the bearing 1 during the movement. In this embodiment, the main structure of the upper sealing plate 23 and the lower sealing plate 24 is a thin cylinder, which is convenient for docking with the bearing 1.

[0034] The lower end face of the upper sealing plate 23 is provided with a first protruding ring 233, which is adapted to the gap between the inner and outer rings of the bearing 1. The upper end face of the lower sealing plate 24 is provided with a second protruding ring 243, which is adapted to the gap between the inner and outer rings of the bearing 1. The second protruding ring 243 is provided with a plurality of filling holes 244 evenly distributed on it. The filling component 40 is connected to the filling holes 244. By setting the first protruding ring 233 and the second protruding ring 243, the bearing 1 can be effectively sealed by the upper sealing plate 23 and the lower sealing plate 24. Then, the filling holes 244 are set so that the grease can enter the interior of the bearing 1 through the filling holes 244. The bearing 1 can be filled with grease in one go without flipping it in the sealed state. The filling efficiency is high, the grease will not leak, the production environment is kept clean, and the outside of the bearing 1 will not be contaminated by the grease.

[0035] Two sets of positioning assemblies 30 are provided, located on both sides of the bearing 1. Each positioning assembly 30 includes a connecting plate 31, a roller 32, a connecting plate 33, a push plate 34, and a positioning plate 35. The connecting plate 31 has a "7"-shaped cross-section. The transverse section of the connecting plate 31 connects to the side wall of the upper sealing plate 23. The vertical section of the connecting plate 31 has a first through groove 311 running from front to back, and the lower end of the vertical section of the connecting plate 31 bends away from the bearing 1. The vertical section of the connecting plate 31 is adapted to the roller 32, which passes through the first through groove 311 and is slidably connected to it. The mounting plate 14 has two through grooves 142 that pass through it vertically. The two through grooves 142 are located on both sides of the bearing 1. The positioning plate 35 is located at the upper end of the second through groove 142. The upper end of the push plate 34 passes through the second through groove 142 and is connected to the positioning plate 35. The push plate 34 is slidably connected to the second through groove 142. There are two connecting plates 33. Both ends of the roller 32 are connected to the roller 32. Connected to the connecting plate 33, the other end of the connecting plate 33 is connected to the lower end of the push plate 34. The positioning plate 35 is provided with a positioning groove 351 that fits the side wall of the bearing 1 on the side near the bearing 1. When the upper sealing plate 23 is driven to move downward, the connecting plate 31 also moves. At this time, the roller 32 in the first through groove 311 will slide along the first through groove 311. Due to the bending structure at the lower end of the vertical section of the connecting plate 31, the roller 32 will be subjected to a force towards the bearing 1, which is transmitted through the connecting plate 33. The push plate 34 is handed over, and then the positioning plate 35 is pushed to move horizontally toward the bearing 1. Finally, the bearing 1 is positioned under the clamping of the positioning plates 35 on both sides, so that it is aligned with the positioning hole 141, ensuring that the first convex ring 233 and the second convex ring 243 can be accurately embedded in the middle of the bearing 1. In this embodiment, the push plate 34 is adapted to the second through groove 142, and the mounting plate 14 is also provided with two grooves so that the vertical section of the connecting plate 31 passes through the mounting plate 14 and the slide rod 312 passes through the mounting plate 14 when it moves down.

[0036] The top of the vertical section of the connecting plate 31 is provided with a slide rod 312, and the front end face of the upright plate 12 is provided with a second slide groove 16 on both sides. The slide rod 312 extends backward and is embedded in the second slide groove 16. The slide rod 312 is adapted to the second slide groove 16 and is slidably connected to it. The slide rod 312 can support and stabilize the connecting plate 31, prevent it from shaking when it moves down, and improve the stability of the positioning assembly 30.

[0037] A third through groove 17 is provided at the position corresponding to the front end of the upright plate 12 and the push plate 34. The rear end of the push plate 34 extends backward and passes through the third through groove 17. The part of the push plate 34 embedded in the third through groove 17 is adapted to the third through groove 17. The height of the part of the rear end of the push plate 34 protruding from the third through groove 17 is greater than the height of the third through groove 17. The push plate 34 and the third through groove 17 are slidably connected. The cooperation between the push plate 34 and the third through groove 17 can improve the stability of the push plate 34. The structure of the push plate 34 embedded in the third through groove 17 can lock the push plate 34 and prevent the push plate 34 from shaking, further ensuring the smoothness of the locking component 30 during operation.

[0038] The filling assembly 40 includes a mounting plate 41, filling needles 42, a connecting main pipe 43, and multiple connecting branch pipes 44. The mounting plate 41 is located directly below the lower sealing plate 24. The mounting plate 41 and the lower sealing plate 24 are connected by a telescopic cylinder 45. The filling needles 42 are evenly distributed on the upper surface of the mounting plate 41, and the filling needles 42 correspond vertically to the filling holes 244 and are embedded in the filling holes 244. The upper end of the connecting branch pipe 44 passes through the mounting plate 41 and communicates with the filling needles 42. The lower end of the connecting branch pipe 44 communicates with the connecting main pipe 43. One end of the connecting main pipe 43 communicates with the grease storage tank. Under the connection of the telescopic cylinder 45, the mounting plate 41 moves upward as the lower sealing plate 24 moves upward. After the upper sealing plate 23 and the lower sealing plate 24 close the bearing 1, the telescopic cylinder 45 is activated, pulling the mounting plate 41 upward, so that the filling needles 42 pass through the filling holes 244. The grease enters the interior of bearing 1, and then the grease is transferred from one side of the main pipe 43 to the connecting branch pipe 44, so that the grease enters the interior of bearing 1 through the filling needle 42, completing the grease filling process of bearing 1. In this embodiment, there are two telescopic cylinders 45, and the line connecting the two telescopic cylinders 45 coincides with the diameter of the mounting plate 41 to ensure the stability of the movement of the mounting plate 41. The filling holes 244 on the second convex ring 243 are arranged in pairs, and correspondingly, the filling needles 42 on the mounting plate 41 are also arranged in pairs, for a total of ten sets. The ten sets of filling needles 42 are circumferentially distributed, and there are ten corresponding connecting branch pipes 44. Each connecting branch pipe 44 is connected to a set of filling needles 42. In specific implementation, a water pump or other suction equipment needs to be installed at the end of the main pipe 43 connected to the grease storage tank to ensure that the grease can enter the main pipe 43 from the storage tank.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bearing internal grease injection device, characterized in that, The device includes a frame, a sealing assembly, a positioning assembly, and a filling assembly. The frame includes a base, a vertical plate, and a top plate. The vertical plate is connected to the rear end of the upper surface of the base, and the top plate is connected to the upper end of the front surface of the vertical plate. A mounting plate is provided in the middle of the front surface of the vertical plate, and a positioning hole is provided in the middle of the mounting plate. A bearing to be filled with grease is provided on the upper surface of the mounting plate, corresponding to the positioning hole. The diameter of the positioning hole is consistent with the inner diameter of the outer ring of the bearing. The sealing assembly includes a servo motor, a screw, an upper sealing plate, and a lower sealing plate. The servo motor is mounted on the top plate. The upper end of the screw passes through the top plate and is connected to the servo motor. The lower end of the screw passes through the mounting plate and is connected to the base. The upper sealing plate and the lower sealing plate are both threadedly connected to the screw. The upper sealing plate is located above the mounting plate, and the lower sealing plate is located below the mounting plate. The servo motor drives the upper sealing plate and the lower sealing plate to move towards the bearing and seal the upper and lower ends of the bearing. The locking assembly is connected to the upper sealing plate and is used to clamp the bearing when the upper sealing plate moves downward.

2. The bearing internal grease injection device according to claim 1, characterized in that, The screw is provided with a positive thread and a reverse thread. The upper sealing plate is connected to the positive thread, and the lower sealing plate is connected to the reverse thread.

3. The bearing internal grease injection device according to claim 2, characterized in that, The screw is provided in two parts, located on both sides of the rear end of the bearing. The top plate is provided with two servo motors. The rear end of the upper sealing plate is provided with two first extension side plates, which are respectively connected to the positive threads on the two screws. The rear end of the lower sealing plate is provided with two second extension side plates, which are respectively connected to the reverse threads on the two screws.

4. The bearing internal grease injection device according to claim 1, characterized in that, The upper sealing plate has a first extended rear plate at the middle of its rear end, and the front end of the upright plate has a vertical first sliding groove. The rear end of the first extended rear plate is adapted to the first sliding groove, and the rear end of the first extended rear plate is embedded in the first sliding groove and slidably connected to the first sliding groove. The lower sealing plate has a second extended rear plate at the middle of its rear end, and the rear end of the second extended rear plate is adapted to the first sliding groove. The rear end of the second extended rear plate is embedded in the first sliding groove and slidably connected to the first sliding groove.

5. The bearing internal grease injection device according to claim 1, characterized in that, The lower end face of the upper sealing plate is provided with a first protruding ring, which is adapted to the gap between the inner and outer rings of the bearing. The upper end face of the lower sealing plate is provided with a second protruding ring, which is adapted to the gap between the inner and outer rings of the bearing. The second protruding ring is provided with a plurality of filling holes evenly distributed on it, and the filling assembly is connected to the filling holes.

6. The bearing internal grease injection device according to claim 1, characterized in that, The positioning assembly is provided in two sets, with each set located on one side of the bearing. Each positioning assembly includes a connecting plate, a roller, a connecting plate, a push plate, and a positioning plate. The connecting plate has a "7"-shaped cross-section. The transverse section of the connecting plate connects to the side wall of the upper sealing plate. The vertical section of the connecting plate has a first through groove running from front to back, and the lower end of the vertical section bends away from the bearing. The first through groove is adapted to the vertical section of the connecting plate. The roller passes through the first through groove from front to back and... The mounting plate has two through slots that run vertically through each other. The two through slots are located on both sides of the bearing. The positioning plate is located at the upper end of the two through slots. The upper end of the push plate passes through the two through slots and is connected to the positioning plate. The push plate is slidably connected to the two through slots. There are two connecting plates. Both ends of the roller are connected to the connecting plate. The other end of the connecting plate is connected to the lower end of the push plate. The positioning plate has a positioning slot on the side near the bearing that is adapted to the side wall of the bearing.

7. The bearing internal grease injection device according to claim 6, characterized in that, The top of the vertical section of the connecting plate is provided with a sliding rod, and the front end face of the upright plate is provided with second sliding grooves on both sides. The sliding rod extends backward and is embedded in the second sliding groove. The sliding rod is adapted to the second sliding groove and slidably connected with it.

8. The bearing internal grease injection device according to claim 6, characterized in that, The front end face of the upright plate is provided with a third through groove at the position corresponding to the push plate. The rear end of the push plate extends backward and passes through the third through groove. The part of the push plate embedded in the third through groove is adapted to the third through groove. The height of the part of the rear end of the push plate protruding from the third through groove is greater than the height of the third through groove. The push plate and the third through groove are slidably connected.

9. The bearing internal grease injection device according to claim 5, characterized in that, The filling assembly includes a mounting plate, filling needles, a connecting main pipe, and multiple connecting branch pipes. The mounting plate is located directly below the lower sealing plate. The mounting plate and the lower sealing plate are connected by a telescopic cylinder. The filling needles are evenly distributed on the upper surface of the mounting plate. The filling needles correspond vertically to the filling holes and are embedded in the filling holes. The upper end of the connecting branch pipe passes through the mounting plate and communicates with the filling needles. The lower end of the connecting branch pipe communicates with the connecting main pipe. One end of the connecting main pipe communicates with the grease storage tank.

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