A lubricating device for the roller disc and ring rail of an electric excavator

Abstract

The utility model relates to a lubricating device of electric excavator roller disc and ring rail, including revolving stage, closed loop's upper ring rail and gyro wheel, the upper ring rail includes gyro wheel walking surface and outside, be equipped with oil drip pipe in the upper ring rail, the oil inlet of oil drip pipe is in the outside of upper ring rail, the oil outlet of oil drip pipe is in gyro wheel walking surface, be equipped with check assembly in oil drip pipe, check assembly includes the sleeve ring fixedly connected in oil drip pipe, the sleeve ring is pasted with piston board in, the lower end fixedly connected with guide rod of piston board, the support plate that is connected with oil drip pipe slidingly through sliding assembly is fixedly connected on the guide rod, be equipped with spring in the sliding assembly, be equipped with connecting piece on oil drip pipe, be equipped with plugging assembly in oil drip pipe, realize the real -time lubrication of upper ring rail and gyro wheel when revolving mechanism works, and prevent lubricating oil backflow, when not using, can prevent foreign matter to enter into oil drip pipe.

Description

Technical Field

[0001] This utility model relates to the field of lubrication structure technology, and in particular to a lubrication device for the roller disc and ring rail of an electric excavator. Background Technology

[0002] The slewing mechanism of an electric excavator includes a slewing platform, ring rails, and rollers (also known as slewing wheels). Large electric excavators use automatic thin oil drip lubrication for the rollers and ring rails. This method involves placing the drip pipe of the automatic thin oil dripping device above the rollers (where there is no upper ring rail). The drip pipe directly drips oil onto the rollers or lower ring rail. However, the upper ring rail of the slewing mechanism in small and medium-sized electric excavators is almost a closed loop (the upper ring rail only has a gap for replacing rollers on the side and rear). Lubrication in these machines mainly relies on manually applying lubricating grease to the rollers or ring rails. The problem is that lubrication cannot be delivered effectively and promptly to the required lubrication points while the slewing mechanism is operating, resulting in limited lubrication effectiveness, wasted time, and reduced work efficiency. Summary of the Invention

[0003] The lubrication device for the roller disc and ring rail of the electric excavator provided by this utility model realizes real-time lubrication of the upper ring rail and rollers when the rotary mechanism is working, and prevents the lubricating oil from flowing back. When not in use, it can prevent foreign objects from entering the oil drip pipe.

[0004] The technical solution of this utility model is a lubrication device for the roller disc and ring rail of an electric excavator, including a rotary platform, a closed-loop upper ring rail and rollers. The upper ring rail includes a roller traveling surface and an outer surface. An oil dripping pipe is provided inside the upper ring rail. The oil inlet of the oil dripping pipe is on the outer surface of the upper ring rail, and the oil outlet of the oil dripping pipe is on the roller traveling surface. A check valve assembly is provided inside the oil dripping pipe. The check valve assembly includes a collar fixedly connected inside the oil dripping pipe. A piston plate is fitted inside the collar. A guide rod is fixedly connected to the lower end of the piston plate. A support plate is fixedly connected to the guide rod and slidably connected to the oil dripping pipe through a sliding assembly. A spring is provided inside the sliding assembly. A connector is provided on the oil dripping pipe, and a sealing assembly is provided inside the oil dripping pipe.

[0005] Furthermore, the connector includes a threaded sleeve that is threadedly connected to the dripping oil pipe. The end of the threaded sleeve away from the dripping oil pipe is rotatably and sealingly connected to a second threaded sleeve. In use, the second threaded sleeve is rotated to connect to the external oil pipe, and the threaded sleeve is rotated to connect to the dripping oil pipe, which facilitates connection to the external oil pipe.

[0006] Furthermore, the sealing assembly includes a second collar fixedly connected inside the dripping oil pipe. A second piston plate is fitted inside the second collar, and a second fixing rod is fixedly connected to the second piston plate. A second support plate is fixedly connected to the second fixing rod. The second support plate is slidably connected to the dripping oil pipe via a second sliding assembly. Hydraulic oil enters the dripping oil pipe from the second collar, compressing the second piston plate. The hydraulic oil then passes through the collar and enters the space between the upper ring rail and the roller for lubrication. Furthermore, the sliding assembly includes a slider fixedly connected to the support plate, a groove adapted to the slider and provided on the oil dripping pipe, and a spring disposed in the groove and connected to the slider and the oil dripping pipe. When no hydraulic oil is supplied, the piston plate and the collar are in contact under the action of the spring force to prevent hydraulic oil backflow. Furthermore, the second sliding assembly includes a second slider fixedly connected to the second support plate and a second sliding groove adapted to the second slider and disposed on the oil dripping pipe. The second sliding groove is provided with a second spring connected to the second slider and the oil dripping pipe. When no hydraulic oil is introduced, the threaded sleeve is rotated and unscrewed. Under the action of the elastic force of the second spring, the second piston plate and the second collar fit together to prevent foreign objects from entering the oil dripping pipe.

[0007] Furthermore, the cross-sections of the first collar and the second collar are trapezoidal.

[0008] Furthermore, a connecting plate is fixedly connected inside the threaded sleeve, and a push rod is fixedly connected to the connecting plate. When the threaded sleeve is rotated to connect with the oil dripping pipe, the push rod pushes the second piston plate and separates from the second collar.

[0009] The beneficial effects of this utility model are as follows: The automatic lubrication device for the roller disc and ring rail of the electric excavator provided by this utility model realizes real-time lubrication of the upper ring rail and rollers when the rotating mechanism is working, and prevents the lubricating oil from flowing back. When not in use, it can prevent foreign objects from entering the oil drip pipe. Attached Figure Description

[0010] Figure 1 This is a structural diagram of the automatic lubrication device for the roller disc and ring rail of the electric excavator according to this utility model.

[0011] Figure 2 This is a cross-sectional view of the automatic lubrication device for the roller disc and ring rail of the electric excavator according to this utility model.

[0012] Figure 3 This is an enlarged view of point A of the automatic lubrication device for the roller disc and ring rail of the electric excavator according to this utility model.

[0013] Figure 4 This is an enlarged view of point B of the automatic lubrication device for the roller disc and ring rail of the electric excavator according to this utility model.

[0014] In the diagram, 1. Rotary platform, 2. Upper ring rail, 3. Roller, 4. Oil drip pipe, 5. Collar, 6. Piston plate, 7. Guide rod, 8. Second spring, 9. Sliding assembly, 10. Support plate, 11. Spring, 12. Threaded sleeve, 13. Second threaded sleeve, 14. Second collar, 15. Second piston plate, 16. Second fixed rod, 17. Second support plate, 18. Second sliding assembly, 19. Connecting plate, 20. Top rod. Detailed Implementation

[0015] The following description, in conjunction with the accompanying drawings, further illustrates this embodiment.

[0016] like Figure 1-4 The lubrication device for the roller disc and ring rail of the electric excavator in this embodiment includes a rotary platform 1, a closed-loop upper ring rail 2, and rollers 3. The upper ring rail 2 includes a roller traveling surface and an outer surface. An oil dripping pipe 4 is provided inside the upper ring rail 2. The oil inlet of the oil dripping pipe 4 is on the outer surface of the upper ring rail 2, and the oil outlet of the oil dripping pipe 4 is on the roller traveling surface. A check valve assembly is provided inside the oil dripping pipe 4. The check valve assembly includes a collar 5 fixedly connected inside the oil dripping pipe 4. A piston plate 6 is fitted inside the collar 5. A guide rod 7 is fixedly connected to the lower end of the piston plate 6. A support plate 10 is fixedly connected to the guide rod 7 and slidably connected to the oil dripping pipe 4 via a sliding assembly 9. A spring 11 is provided inside the sliding assembly 9. A connector is provided on the oil dripping pipe 4, and a sealing assembly is provided inside the oil dripping pipe 4.

[0017] The connector described in this embodiment includes a threaded sleeve 12 that is threadedly connected to the oil dripping pipe 4, and a second threaded sleeve 13 is rotatably and sealingly connected to one end of the threaded sleeve 12 away from the oil dripping pipe 4.

[0018] The sealing assembly described in this embodiment includes a second collar 14 fixedly connected inside the oil dripping pipe 4. A second piston plate 15 is attached inside the second collar 14. A second fixing rod 16 is fixedly connected to the second piston plate 15. A second support plate 17 is fixedly connected to the second fixing rod 16. The second support plate 17 is slidably connected to the oil dripping pipe 4 through a second sliding assembly 18.

[0019] The sliding component 9 described in this embodiment includes a slider fixedly connected to the support plate 10, a groove adapted to the slider and provided on the oil dripping pipe 4, and a spring 11 provided in the groove and connected to the slider and the oil dripping pipe 4.

[0020] In this embodiment, the second sliding component 18 includes a second slider fixedly connected to the second support plate 17, a second sliding groove adapted to the second slider and provided on the oil dripping pipe 4, and a second spring 8 connected to the second slider and the oil dripping pipe 4 is provided in the second sliding groove.

[0021] In this embodiment, the cross-sections of the collar 5 and the second collar 14 are trapezoidal structures.

[0022] In this embodiment, a connecting plate 19 is fixedly connected inside the threaded sleeve 12, and a push rod 20 is fixedly connected to the connecting plate 19.

[0023] The principle of this embodiment is as follows: In use, the second threaded sleeve 13 is rotated to connect with the external oil pipe, and the threaded sleeve 12 is rotated to connect with the drip oil pipe 4. When the threaded sleeve 12 is rotated to connect with the drip oil pipe 4, the push rod 20 pushes the second piston plate 15, and the hydraulic oil enters the drip oil pipe 4 from the second collar 14, squeezing the second piston plate 15. The hydraulic oil enters the space between the upper ring rail 2 and the roller 3 through the collar 5 for lubrication. When no hydraulic oil enters, the piston plate 6 and the collar 5 are in contact under the action of the spring force of the spring 11 to prevent the hydraulic oil from flowing back. Rotate and unscrew the threaded sleeve 12. Under the action of the spring force of the second spring 8, the second piston plate 15 and the second collar 14 are in contact to prevent foreign objects from entering the drip oil pipe 4.

[0024] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A lubrication device for the roller disc and ring rail of an electric excavator, comprising a rotary platform (1), a closed-loop upper ring rail (2), and rollers (3), characterized in that: The upper ring rail (2) includes a roller traveling surface and an outer surface. An oil dripping pipe (4) is provided inside the upper ring rail (2). The oil inlet of the oil dripping pipe (4) is on the outer surface of the upper ring rail (2), and the oil outlet of the oil dripping pipe (4) is on the roller traveling surface. A check valve assembly is provided inside the oil dripping pipe (4). The check valve assembly includes a collar (5) fixedly connected inside the oil dripping pipe (4). A piston plate (6) is attached inside the collar (5). A guide rod (7) is fixedly connected to the lower end of the piston plate (6). A support plate (10) is fixedly connected to the guide rod (7) and slidably connected to the oil dripping pipe (4) through a sliding assembly (9). A spring (11) is provided inside the sliding assembly (9). A connector is provided on the oil dripping pipe (4). A sealing assembly is provided inside the oil dripping pipe (4).

2. The lubrication device for the roller disc and ring rail of the electric excavator according to claim 1, characterized in that: The connector includes a threaded sleeve (12) that is threaded to the dripping pipe (4), and a second threaded sleeve (13) is rotatably and sealingly connected to one end of the threaded sleeve (12) away from the dripping pipe (4).

3. The lubrication device for the roller disc and ring rail of the electric excavator according to claim 1, characterized in that: The sealing assembly includes a second collar (14) fixedly connected inside the dripping oil pipe (4), a second piston plate (15) is attached inside the second collar (14), a second fixing rod (16) is fixedly connected to the second piston plate (15), a second support plate (17) is fixedly connected to the second fixing rod (16), and the second support plate (17) is slidably connected to the dripping oil pipe (4) through a second sliding assembly (18).

4. The lubrication device for the roller disc and ring rail of the electric excavator according to claim 1, characterized in that: The sliding assembly (9) includes a slider fixedly connected to the support plate (10), a groove adapted to the slider and provided on the oil dripping pipe (4), and the spring (11) is provided in the groove and connected to the slider and the oil dripping pipe (4).

5. The lubrication device for the roller disc and ring rail of the electric excavator according to claim 3, characterized in that: The second sliding assembly (18) includes a second slider fixedly connected to the second support plate (17), a second groove adapted to the second slider and provided on the oil dripping pipe (4), and a second spring (8) connected to the second slider and the oil dripping pipe (4) is provided in the second groove.

6. The lubrication device for the roller disc and ring rail of the electric excavator according to claim 3, characterized in that: The cross-sections of the collar (5) and the second collar (14) are trapezoidal.

7. The lubrication device for the roller disc and ring rail of an electric excavator according to claim 2, characterized in that: A connecting plate (20) is fixedly connected inside the threaded sleeve (12), and a push rod (21) is fixedly connected on the connecting plate (20).

Images