Roller bearing for excavator

Abstract

The utility model relates to the technical field of roller bearings, in particular to a roller bearing for an excavator, which comprises an outer ring, a roller retainer, a rear sealing structure and a front sealing structure, a cooling liquid output pipe is arranged at one end of the front side of the front sealing structure, and a cooling liquid input pipe is arranged at the other end of the front side of the front sealing structure. A cooling liquid circulating component is installed at the other end of the cooling liquid output pipe, and a lubricating oil output pipe is arranged at the position, close to the cooling liquid output pipe, of the front side of the front sealing structure. Cooling liquid is circulated on the inner side of the inner ring through the cooling liquid circulating component, lubricating oil is circulated on the inner side of the outer ring through the cooling liquid circulating component, the bearing is cooled, the situation that the lubricating oil is evaporated due to too large heat of the bearing is avoided, the fluidity of the lubricating oil is improved through the cooling liquid circulating component, and the smoothness of the bearing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of roller bearings, and specifically relates to a roller bearing for an excavator. Background Art

[0002] The outer ring of the roller bearing adopts a full complement cylindrical roller bearing with a relatively thick outer ring wall. The outer diameter surface of the roller has a cylindrical shape and an arc shape, which can be designed according to the use occasion to cooperate with the raceway surface. With this kind of outer ring, the roller can directly roll on the raceway and can bear heavy loads and impact loads. The roller bearing for an excavator has a greater demand for load-bearing. For example, a Chinese patent discloses a roller bearing (authorization publication number CN218971675U). The patented technology has a novel structure and good sealing performance, preventing pollutants such as dust and mud from entering the raceway and causing failure, and extending the service life of the bearing in a harsh environment;

[0003] However, when the existing disclosed roller bearings are actually applied, there are still some defects that need to be improved. For example:

[0004] Firstly, the heat generated by friction during the working process is relatively large, resulting in the evaporation of lubricating oil and affecting the service life of the bearing;

[0005] Secondly, the lubricating oil is located inside the bearing for a long time, and its fluidity is poor. Metal chips worn during the working process of the bearing are mixed into the lubricating oil, affecting the lubrication effect of the lubricating oil and the smoothness of the bearing. Therefore, those skilled in the art provide a roller bearing for an excavator to solve the problems raised in the above background art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a roller bearing for an excavator to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A roller bearing for an excavator includes an outer ring, a roller retainer, a rear sealing structure and a front sealing structure. The roller retainer is located inside the outer ring. The rear sealing structure is located at the rear side of the roller retainer. The front sealing structure is located at the front side of the roller retainer;

[0009] At one end of the front side of the front sealing structure, a coolant output pipe is provided. At the other end of the front side of the front sealing structure, a coolant input pipe is provided. The other end of the coolant output pipe is installed with a coolant circulation component. At a position adjacent to the coolant output pipe on the front side of the front sealing structure, a lubricating oil output pipe is provided. At a position adjacent to the coolant input pipe on the front side of the front sealing structure, a lubricating oil input pipe is provided. A bearing plate is provided on the lower side of the coolant circulation component;

[0010] The rear sealing structure includes a rear sealing cover. An inner ring is provided on the front side of the rear sealing cover, and a mounting hole is provided on the inner side of the inner ring. The front sealing structure includes a front sealing cover.

[0011] As a further solution of the present utility model: A positioning hole is formed on the front side of the front sealing cover, and fixing screws are installed on the front side of the front sealing cover. Both the coolant circulation member and the lubricating oil circulation member include a storage tank. Cooling coils are provided on the upper side of the storage tank, and heat dissipation fans are installed at both ends of the upper side of the storage tank. A suction pipe is provided at a lower position on one side of the storage tank, and an output pump is installed at one end of the suction pipe.

[0012] As a further solution of the present utility model: The inner ring is located inside the roller retainer, the outer ring is located outside the roller retainer, and the outer ring rotates outside the rear sealing structure through the roller retainer.

[0013] As a further solution of the present utility model: The inner side of the inner ring is communicated with the input end of the coolant output pipe, the output end of the coolant output pipe is communicated with the input end of the coolant circulation member, the output end of the coolant circulation member is communicated with the input end of the coolant input pipe, and the output end of the coolant input pipe is communicated with the inner side of the inner ring.

[0014] As a further solution of the present utility model: The inner side of the outer ring is communicated with the input end of the lubricating oil output pipe, the output end of the lubricating oil output pipe is communicated with the input end of the lubricating oil circulation member, the output end of the lubricating oil circulation member is communicated with the input end of the lubricating oil input pipe, and the output end of the lubricating oil input pipe is communicated with the inner side of the outer ring.

[0015] As a further solution of the present utility model: The front end of the mounting hole is located inside the positioning hole, and the front sealing cover is fixed to the front side of the inner ring through the fixing screws.

[0016] As a further solution of the present utility model: The output end of the cooling coil is communicated with the upper end of the storage tank, the lower end of the storage tank is communicated with the input end of the suction pipe, the output end of the suction pipe is communicated with the input end of the output pump, the output end of the coolant output pipe is communicated with the input end of the cooling coil, the output end of the output pump is communicated with the input end of the coolant input pipe, the output end of the lubricating oil output pipe is communicated with the input end of the cooling coil, and the output end of the output pump is communicated with the input end of the lubricating oil input pipe.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] 1. A roller bearing for an excavator circulates coolant inside the inner ring through a coolant circulation component, dissipates heat from the bearing through the coolant, circulates lubricating oil inside the outer ring through the coolant circulation component, and can also dissipate heat, avoiding excessive heat of the bearing causing evaporation of the lubricating oil and increasing the service life of the bearing.

[0019] 2. A roller bearing for an excavator circulates lubricating oil inside the outer ring through a coolant circulation component, improves the fluidity of the lubricating oil, and takes out metal chips generated by bearing wear, maintaining the lubrication effect of the lubricating oil and improving the smoothness of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a roller bearing for an excavator;

[0021] Figure 2 It is an exploded view of a roller bearing for an excavator;

[0022] Figure 3 It is a schematic structural diagram of the rear seal structure in a roller bearing for an excavator;

[0023] Figure 4 It is a schematic structural diagram of the front seal structure in a roller bearing for an excavator;

[0024] Figure 5 It is a schematic structural diagram of the coolant circulation component in a roller bearing for an excavator.

[0025] In the figure: 1. Outer ring; 2. Roller retainer; 3. Rear seal structure; 4. Front seal structure; 5. Coolant output pipe; 6. Coolant input pipe; 7. Coolant circulation component; 8. Lubricating oil output pipe; 9. Lubricating oil input pipe; 10. Lubricating oil circulation component; 11. Bearing plate; 12. Rear seal cover; 13. Inner ring; 14. Mounting hole; 15. Front seal cover; 16. Alignment hole; 17. Fixing screw; 18. Storage tank; 19. Cooling coil; 20. Cooling fan; 21. Suction pipe; 22. Output pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Please refer to Figures 1 to 5, in the embodiment of the present utility model, a roller bearing for an excavator includes an outer ring 1, a roller retainer 2, a rear sealing structure 3 and a front sealing structure 4. The roller retainer 2 is located inside the outer ring 1. The rear sealing structure 3 is located at the rear side of the roller retainer 2. The front sealing structure 4 is located at the front side of the roller retainer 2. At one end of the front side of the front sealing structure 4, a coolant output pipe 5 is provided. At the other end of the front side of the front sealing structure 4, a coolant input pipe 6 is provided. The other end of the coolant output pipe 5 is installed with a coolant circulation member 7. At a position on the front side of the front sealing structure 4 near the coolant output pipe 5, a lubricating oil output pipe 8 is provided. At a position on the front side of the front sealing structure 4 near the coolant input pipe 6, a lubricating oil input pipe 9 is provided. A bearing plate 11 is provided below the coolant circulation member 7. The rear sealing structure 3 includes a rear sealing cover 12. An inner ring 13 is provided on the front side of the rear sealing cover 12. An installation hole 14 is provided inside the inner ring 13. The front sealing structure 4 includes a front sealing cover 15. The inner ring 13 is located inside the roller retainer 2. The outer ring 1 is located outside the roller retainer 2. The outer ring 1 rotates outside the rear sealing structure 3 through the roller retainer 2. The inner side of the inner ring 13 is communicated with the input end of the coolant output pipe 5. The output end of the coolant output pipe 5 is communicated with the input end of the coolant circulation member 7. The output end of the coolant circulation member 7 is communicated with the input end of the coolant input pipe 6. The output end of the coolant input pipe 6 is communicated with the inner side of the inner ring 13. The inner side of the outer ring 1 is communicated with the input end of the lubricating oil output pipe 8. The output end of the lubricating oil output pipe 8 is communicated with the input end of the lubricating oil circulation member 10. The output end of the lubricating oil circulation member 10 is communicated with the input end of the lubricating oil input pipe 9. The output end of the lubricating oil input pipe 9 is communicated with the inner side of the outer ring 1. First, fix the rear sealing structure 3 to the installation position through the installation hole 14. Install the outside of the outer ring 1 inside the rotating part of the excavator. Fix the coolant circulation member 7 and the lubricating oil circulation member 10 to the excavator through the bearing plate 11. Then, start using. During the use process, the outer ring 1 rotates outside the inner ring 13 through the roller retainer 2. The lubricating oil circulation member 10 operates, and imports lubricating oil into the inner side of the outer ring 1 through the lubricating oil input pipe 9 to lubricate the roller retainer 2. The lubricating oil inside the outer ring 1 circulates to the inside of the coolant circulation member 7 through the lubricating oil output pipe 8. The coolant circulation member 7 operates, and imports coolant into the inner side of the inner ring 1 through the coolant input pipe 6 to cool the inner ring 1. The coolant inside the inner ring 1 circulates to the inside of the coolant circulation member 7 through the coolant output pipe 5.

[0027] In Figure 1 , 2Among 3, 4, and 5: A positioning hole 16 is provided on the front side of the front seal cover 15, and a fixing screw 17 is installed on the front side of the front seal cover 15. Both the coolant circulation member 7 and the lubricating oil circulation member 10 include a storage tank 18. A cooling coil 19 is provided on the upper side of the storage tank 18. Heat dissipation fans 20 are installed at both ends of the upper side of the storage tank 18. A suction pipe 21 is provided at a position near the lower end of one side of the storage tank 18. An output pump 22 is installed at one end of the suction pipe 21. The front end of the installation hole 14 is located inside the positioning hole 16. The front seal cover 15 is fixed to the front side of the inner ring 13 by the fixing screw 17. The output end of the cooling coil 19 communicates with the upper end of the storage tank 18. The lower end of the storage tank 18 communicates with the input end of the suction pipe 21. The output end of the suction pipe 21 communicates with the input end of the output pump 22. The output end of the coolant output pipe 5 communicates with the input end of the cooling coil 19. The output end of the output pump 22 communicates with the input end of the coolant input pipe 6. The output end of the lubricating oil output pipe 8 communicates with the input end of the cooling coil 19. The output end of the output pump 22 communicates with the input end of the lubricating oil input pipe 9. During use, the outer ring 1 rotates on the outside of the inner ring 13 through the roller retainer 2. The output pump 22 on the lubricating oil circulation member 10 operates, extracts the lubricating oil inside the storage tank 18 through the suction pipe 21, and introduces the lubricating oil into the inside of the outer ring 1 through the lubricating oil input pipe 9 to lubricate the roller retainer 2. The lubricating oil inside the outer ring 1 circulates into the inside of the cooling coil 19 through the lubricating oil output pipe 8. The heat dissipation fan 20 air-cools the cooling coil 19. The lubricating oil inside the cooling coil 19 enters the inside of the storage tank 18. The output pump 22 on the coolant circulation member 7 operates, extracts the coolant inside the storage tank 18 through the suction pipe 21, and introduces the coolant into the inside of the inner ring 13 through the coolant input pipe 6 to cool the inner ring 13. The coolant inside the inner ring 13 circulates into the inside of the cooling coil 19 through the coolant output pipe 5. The heat dissipation fan 20 air-cools the cooling coil 19. The coolant inside the cooling coil 19 enters the inside of the storage tank 18.

[0028] The working principle of the present utility model is as follows: First, the rear sealing structure 3 is fixed to the installation position through the installation hole 14, the outer side of the outer ring 1 is installed on the inner side of the rotating part of the excavator, and the coolant circulation component 7 and the lubricating oil circulation component 10 are fixed to the excavator through the bearing plate 11. Then, start using. During the use process, the outer ring 1 rotates on the outer side of the inner ring 13 through the roller retainer 2. The output pump 22 on the lubricating oil circulation component 10 operates, extracts the lubricating oil inside the storage tank 18 through the suction pipe 21, and introduces the lubricating oil into the inner side of the outer ring 1 through the lubricating oil input pipe 9 to lubricate the roller retainer 2. The lubricating oil inside the outer ring 1 circulates into the inside of the cooling coil 19 through the lubricating oil output pipe 8, and the cooling fan 20 air-cools the cooling coil 19. The lubricating oil inside the cooling coil 19 enters the inside of the storage tank 18. The output pump 22 on the coolant circulation component 7 operates, extracts the coolant inside the storage tank 18 through the suction pipe 21, and introduces the coolant into the inner side of the inner ring 13 through the coolant input pipe 6 to cool the inner ring 13. The coolant inside the inner ring 13 circulates into the inside of the cooling coil 19 through the coolant output pipe 5, and the cooling fan 20 air-cools the cooling coil 19. The coolant inside the cooling coil 19 enters the inside of the storage tank 18.

[0029] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A roller bearing for an excavator, characterized in that: The roller retainer (2) comprises an outer ring (1), a roller retainer (2), a rear sealing structure (3) and a front sealing structure (4), wherein the roller retainer (2) is located at an inner position of the outer ring (1), the rear sealing structure (3) is located at a rear side position of the roller retainer (2), and the front sealing structure (4) is located at a front side position of the roller retainer (2); A coolant output pipe (5) is provided at one end of the front side of the front sealing structure (4), a coolant input pipe (6) is provided at the other end of the front side of the front sealing structure (4), a coolant circulation component (7) is installed at the other end of the coolant output pipe (5), a lubricating oil output pipe (8) is provided at a position adjacent to the coolant output pipe (5) on the front side of the front sealing structure (4), a lubricating oil input pipe (9) is provided at a position adjacent to the coolant input pipe (6) on the front side of the front sealing structure (4), and a bearing plate (11) is provided at the lower side of the coolant circulation component (7); The rear sealing structure (3) comprises a rear sealing cover (12), the front side of the rear sealing cover (12) is provided with an inner ring (13), the inner side of the inner ring (13) is provided with a mounting hole (14), and the front sealing structure (4) comprises a front sealing cover (15).

2. The roller bearing for excavator according to claim 1, characterized in that: An alignment hole (16) is provided on the front side of the front sealing cover (15), and a fixing screw (17) is installed on the front side of the front sealing cover (15). The coolant circulation component (7) and the lubricating oil circulation component (10) both include a storage box (18), a cooling coil (19) is provided on the upper side of the storage box (18), cooling fans (20) are installed at both ends of the upper side of the storage box (18), a suction pipe (21) is provided at the lower end of one side of the storage box (18), and an output pump (22) is installed at one end of the suction pipe (21).

3. The roller bearing for excavator according to claim 1, characterized in that: The inner ring (13) is located at an inner position of the roller holder (2), the outer ring (1) is located at an outer position of the roller holder (2), and the outer ring (1) is rotated to an outer position of the rear sealing structure (3) through the roller holder (2).

4. The roller bearing for excavator according to claim 1, characterized in that: The inner side of the inner ring (13) is connected to the input end of the coolant output pipe (5), the output end of the coolant output pipe (5) is connected to the input end of the coolant circulation component (7), the output end of the coolant circulation component (7) is connected to the input end of the coolant input pipe (6), and the output end of the coolant input pipe (6) is connected to the inner side of the inner ring (13).

5. The roller bearing for excavator according to claim 1, characterized in that: The inner side of the outer ring (1) is connected to the input end of the lubricating oil output pipe (8), the output end of the lubricating oil output pipe (8) is connected to the input end of the lubricating oil circulation component (10), the output end of the lubricating oil circulation component (10) is connected to the input end of the lubricating oil input pipe (9), and the output end of the lubricating oil input pipe (9) is connected to the inner side of the outer ring (1).

6. The roller bearing for excavator according to claim 2, characterized in that: The front end of the mounting hole (14) is located at an inner side of the alignment hole (16), and the front sealing cover (15) is fixed to the front side of the inner ring (13) by means of fixing screws (17).

7. The roller bearing for excavator according to claim 2, characterized in that: The output end of the cooling coil (19) is connected to the upper end of the storage box (18), the lower end of the storage box (18) is connected to the input end of the suction pipe (21), the output end of the suction pipe (21) is connected to the input end of the output pump (22), the output end of the coolant output pipe (5) is connected to the input end of the cooling coil (19), the output end of the output pump (22) is connected to the input end of the coolant input pipe (6), the output end of the lubricating oil output pipe (8) is connected to the input end of the cooling coil (19), and the output end of the output pump (22) is connected to the input end of the lubricating oil input pipe (9).

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