Hydraulic cylinder buffer mechanism of high-pressure hydraulic system of milling excavator

Abstract

The utility model relates to the field of hydraulic cylinders, and discloses a hydraulic cylinder buffer mechanism of a high-pressure hydraulic system of a milling excavator, which comprises a shell, a piston column is slidably connected in the shell, a fixed block is fixedly connected to the bottom of the piston column, and first rotating blocks in an annular array are rotatably connected to the outer wall of the fixed block. A sliding rod is fixedly connected to one side of the outer wall of the first rotating block, a sliding column is slidably connected to the outer wall of the sliding rod, a limiting block is fixedly connected to one end of the sliding rod, a sliding groove is formed in the limiting block, the outer wall of the limiting block is slidably connected into the sliding groove, and a second rotating block is fixedly connected to one side of the outer wall of the sliding column. And one side of the outer wall of the rotating block II is rotationally connected to the inner wall of the shell. According to the hydraulic cylinder, the first spring is matched with the second spring, the movement process of the piston column is buffered, the problem that the piston column in the hydraulic rod is really buffered during contraction is solved, and the service life of the hydraulic cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic cylinders, in particular to a hydraulic cylinder buffer mechanism for a high-pressure hydraulic system of a milling excavator. Background Technique

[0002] A hydraulic cylinder is a device that converts hydraulic energy into mechanical energy. It generates a driving force or a pulling force through high-pressure liquid provided by a hydraulic system. Milling excavators usually use hydraulic cylinders to drive milling cutters, excavation devices, and other moving parts. The hydraulic system can provide stable power for these large-scale devices, ensuring the normal progress of construction operations.

[0003] The high-pressure hydraulic system on a milling excavator can be used to drive the rotation, lifting, and lowering of the milling cutter. By controlling the hydraulic cylinder or hydraulic motor, the milling cutter can perform cutting, milling, and leveling operations on the road surface or other working surfaces. At the same time, the high-pressure hydraulic system can also be used to control the movement of the excavation device, such as the telescoping, lifting, and rotation of the excavation arm, as well as the opening, closing, and rotation of the excavation bucket or other excavation tools. This enables the milling excavator to carry out earthwork excavation, transportation, and landfill operations.

[0004] However, when the milling excavator is operating, due to the relatively large self-weight of the hydraulic equipment, when the robotic arm of the milling excavator returns to its original position, it is very difficult to slowly lower these heavy robotic arms to their original positions, which easily causes the robotic arms to drop sharply. The sharp drop of the robotic arms is likely to cause a large impact. Since the hydraulic system does not have a buffer device, it will lead to damage to the mechanical equipment. Therefore, a hydraulic cylinder buffer mechanism for a high-pressure hydraulic system of a milling excavator is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a hydraulic cylinder buffer mechanism for a high-pressure hydraulic system of a milling excavator, aiming to improve the problem that when the milling excavator in the prior art is operating, the hydraulic system does not have a buffer device, which will cause damage to the mechanical equipment.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A hydraulic cylinder buffer mechanism for a high-pressure hydraulic system of a milling excavator, including a housing. A piston column is slidably connected inside the housing. A fixed block is fixedly connected to the bottom of the piston column. A circularly arrayed first rotating block is rotatably connected to the outer wall of the fixed block. A sliding rod is fixedly connected to one side of the outer wall of the first rotating block. A sliding column is slidably connected to the outer wall of the sliding rod. A limiting block is fixedly connected to one end of the sliding rod. A sliding groove is formed inside the limiting block. The outer wall of the limiting block is slidably connected inside the sliding groove. A second rotating block is fixedly connected to one side of the outer wall of the sliding column. One side of the outer wall of the second rotating block is rotatably connected to the inner wall of the housing. A buffer assembly is arranged on the outer wall of the sliding rod;

[0008] As a further description of the above technical solution:

[0009] The buffer assembly includes a first spring and a second spring. Both the first spring and the second spring are sleeved on the outer wall of the sliding rod. One end of the first spring is fixedly connected to the outer wall of the first rotating block, and the other end of the first spring is fixedly connected to the outer wall of the sliding column. One end of the second spring is fixedly connected to one side of the outer wall of the limiting block, and the other end of the second spring is fixedly connected to the inner wall of the sliding column;

[0010] As a further description of the above technical solution:

[0011] A bottom cover is slidably connected to the bottom of the outer shell, and a spacer gasket is provided between the bottom cover and the outer shell;

[0012] As a further description of the above technical solution:

[0013] A first clamping groove is formed on the inner wall of the outer shell, and a first arc-shaped gasket is fixedly connected to one side of the outer wall of the spacer gasket;

[0014] As a further description of the above technical solution:

[0015] The outer wall of the first arc-shaped gasket is slidably connected inside the first clamping groove. A third clamping groove is formed on the outer wall of the bottom cover, and a second clamping groove is formed inside the outer shell;

[0016] As a further description of the above technical solution:

[0017] The spacer gasket is fixedly connected with symmetrically arranged upper and lower second arc-shaped gaskets on the outer wall. The outer wall of one of the second arc-shaped gaskets is slidably connected inside the second clamping groove, and the outer wall of the other second arc-shaped gasket is slidably connected inside the third clamping groove;

[0018] As a further description of the above technical solution:

[0019] A fixing frame is fixedly connected to the bottom of the bottom cover, and annularly arranged mounting columns are fixedly connected to the outer wall of the outer shell. Annularly arranged fixing columns are fixedly connected to the top of the fixing frame;

[0020] As a further description of the above technical solution:

[0021] A sliding column is fixedly connected to the top of the fixing column. The outer wall of the sliding column is slidably connected inside the mounting column. A threaded rod is fixedly connected to the top of the sliding column, and a nut is threadedly connected to the outer wall of the threaded rod.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the present utility model, first, between the piston columns, the sliding rod and the sliding column are connected, so that the movement of the piston column can be adapted by the sliding between the sliding rod and the sliding column. Then, with the cooperation of the first spring and the second spring, the movement process of the piston column is buffered, solving the problem that the piston column in the hydraulic rod lacks buffering during contraction and improving the service life of the hydraulic cylinder.

[0024] 2. In the present utility model, first, the bottom cover can be used to open the outer shell, and the nut is tightened and fixed on the threaded rod. At the same time, a spacer is arranged between the bottom cover and the outer shell. Then, the first arc-shaped gasket and the second arc-shaped gasket on the spacer can cooperate to ensure the sealing of the outer shell, solving the problem that the internal mechanism of the outer shell is inconvenient to maintain and improving the convenience of maintaining the internal mechanism of the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional schematic diagram of a buffer mechanism for a hydraulic cylinder of a high-pressure hydraulic system of a milling excavator proposed by the present utility model;

[0026] Figure 2 is a schematic cross-sectional structure diagram of the outer shell of a buffer mechanism for a hydraulic cylinder of a high-pressure hydraulic system of a milling excavator proposed by the present utility model;

[0027] Figure 3 is Figure 2 an enlarged view of part A in

[0028] LEGEND DESCRIPTION:

[0029] 1. Outer shell; 2. Piston column; 3. Mounting column; 4. Fixed column; 5. Fixed block; 6. Bottom cover; 7. Spacer; 8. First rotating block; 9. Sliding rod; 10. Sliding column; 11. First spring; 12. Chute; 13. Second rotating block; 14. Limit block; 15. Second spring; 16. First card slot; 17. Second card slot; 18. First arc-shaped gasket; 19. Second arc-shaped gasket; 20. Third card slot; 21. Sliding column; 22. Threaded rod; 23. Nut; 24. Fixed bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer to Figure 1 and Figure 2, an embodiment provided by the present utility model: a hydraulic cylinder buffering mechanism for a milling excavator high-pressure hydraulic system, including a housing 1, a piston rod 2 is slidably connected inside the housing 1, a fixed block 5 is fixedly connected to the bottom of the piston rod 2, a circumferentially arrayed first rotating block 8 is rotatably connected to the outer wall of the fixed block 5, a slide bar 9 is fixedly connected to one side of the outer wall of the first rotating block 8, a sliding column 10 is slidably connected to the outer wall of the slide bar 9, a limiting block 14 is fixedly connected to one end of the slide bar 9, a chute 12 is opened inside the limiting block 14, the outer wall of the limiting block 14 is slidably connected inside the chute 12, a second rotating block 13 is fixedly connected to one side of the outer wall of the sliding column 10, and one side of the outer wall of the second rotating block 13 is rotatably connected to the inner wall of the housing 1. A buffering assembly is arranged on the outer wall of the slide bar 9, and the buffering assembly includes a first spring 11 and a second spring 15. Both the first spring 11 and the second spring 15 are sleeved on the outer wall of the slide bar 9. One end of the first spring 11 is fixedly connected to the outer wall of the first rotating block 8, and the other end of the first spring 11 is fixedly connected to the outer wall of the sliding column 10. One end of the second spring 15 is fixedly connected to one side of the outer wall of the limiting block 14, and the other end of the second spring 15 is fixedly connected to the inner wall of the sliding column 10;

[0032] Specifically, in the hydraulic system, the piston rod 2 plays a role in transmitting pressure and pushing moving parts. When the piston rod 2 is pushed outwards, through the connection of the fixed block 5, the slide bar 9 is pulled to slide outwards. The slide bar 9 is installed inside the sliding column 10, and its movement is restricted by the limiting block 14 inside the sliding column 10, so that the acting force is buffered by the second spring 15. When the piston rod 2 retracts inwards, it pushes the slide bar 9 to slide into the sliding column 10. During this process, through the restriction of the first rotating block 8, the acting force is transferred to the first spring 11, so as to be buffered by the first spring 11. This design can effectively control the movement speed and stability of the piston rod 2.

[0033] Refer to Figure 2 And Figure 3 , a bottom cover 6 is slidably connected to the bottom of the housing 1, a spacer gasket 7 is arranged between the bottom cover 6 and the housing 1. A first clamping groove 16 is opened on the inner wall of the housing 1. An arc-shaped gasket 18 is fixedly connected to one side of the outer wall of the spacer gasket 7, and the outer wall of the arc-shaped gasket 18 is slidably connected inside the first clamping groove 16. A third clamping groove 20 is opened on the outer wall of the bottom cover 6, a second clamping groove 17 is opened inside the housing 1, and arc-shaped gaskets 19 are fixedly connected to the upper and lower symmetry on the outer wall of the spacer gasket 7. The outer wall of one side arc-shaped gasket 19 is slidably connected inside the second clamping groove 17, and the outer wall of the other side arc-shaped gasket 19 is slidably connected inside the third clamping groove 20;

[0034] Specifically, when the bottom cover 6 is fixed to the outer shell 1, in order to ensure the sealing of the system, a spacer gasket 7 is required. The spacer gasket 7 is placed in the gap between the bottom cover 6 and the outer shell 1. There are two arc-shaped gaskets II 19 on the spacer gasket 7, which are respectively snapped into the slot II 17 on the inner wall of the outer shell 1 and the slot III 20 on the outer wall of the bottom cover 6 to ensure the sealing of the outer shell 1. At the same time, the arc-shaped gasket I 18 on the outer wall of the spacer gasket 7 will be snapped into the slot I 16 on the inner wall of the outer shell 1 to further enhance the sealing effect.

[0035] Refer to Figure 2 With Figure 3 , a fixing frame 24 is fixedly connected to the bottom of the bottom cover 6, and annularly arrayed mounting posts 3 are fixedly connected to the outer wall of the outer shell 1. Annularly arrayed fixing posts 4 are fixedly connected to the top of the fixing frame 24. A sliding post 21 is fixedly connected to the top of the fixing post 4. The outer wall of the sliding post 21 is slidably connected inside the mounting post 3. A threaded rod 22 is fixedly connected to the top of the sliding post 21, and a nut 23 is threadedly connected to the outer wall of the threaded rod 22;

[0036] Specifically, when it is necessary to fix the bottom cover 6, the fixing frame 24 at the bottom of the bottom cover 6 can be used for fixing. There is a fixing post 4 on the fixing frame 24, which fits with the mounting post 3 on the outer wall of the outer shell 1. By inserting the sliding post 21 at the top of the fixing post 4 into the inside of the mounting post 3, and then rotating and tightening the nut 23 on the top of the fixing post 4 with the nut 23, the bottom cover 6 can be fixed. Through this design, the fitting between the fixing frame 24 and the mounting post 3 and the tightening of the nut 23 can provide sufficient fixing force to ensure that the bottom cover 6 is firmly fixed to the outer shell 1 of the hydraulic system.

[0037] Working principle: When the piston rod 2 is pushed outwards, it will pull the sliding rod 9 through the fixing block 5. Then the sliding rod 9 will slide outwards inside the sliding column 10. At the same time, restricted by the limiting block 14 when the sliding rod 9 slides inside the sliding column 10, the acting force of the sliding rod 9 is applied to the spring II 15, so as to buffer through the spring II 15. When the piston rod 2 retracts inwards, it will push the sliding rod 9 to slide inside the sliding column 10. Thus, restricted by the rotating block I 8, the force is applied to the spring I 11, so as to buffer through the spring I 11. When the bottom cover 6 is fixed, it can be fixed by the fixing frame 24 at the bottom of the bottom cover 6. The fixing post 4 on the fixing frame 24 will fit with the mounting post 3 on the outer wall of the outer shell 1, so that the sliding post 21 at the top of the fixing post 4 is inserted into the inside of the mounting post 3. Then, by rotating and tightening the nut 23 on the top of the fixing post 4 with the nut 23, the bottom cover 6 is fixed. When the bottom cover 6 is fixed to the outer shell 1, a spacer gasket 7 is placed in the gap between the bottom cover 6 and the outer shell 1. The two arc-shaped gaskets II 19 on the spacer gasket 7 will be respectively snapped into the slot II 17 on the inner wall of the outer shell 1 and the slot III 20 on the outer wall of the bottom cover 6 to seal the outer shell 1. At the same time, the arc-shaped gasket I 18 on the outer wall of the spacer gasket 7 will be snapped into the slot I 16 on the inner wall of the outer shell 1 to further seal.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder buffer mechanism of a high-pressure hydraulic system of a milling machine, comprising a housing (1), characterized in that: The outer shell (1) is slidably connected to a piston column (2), the bottom of the piston column (2) is fixedly connected to a fixed block (5), the outer wall of the fixed block (5) is rotatably connected to a rotating block 1 (8) of an annular array, one side of the outer wall of the rotating block 1 (8) is fixedly connected to a sliding rod (9), the outer wall of the sliding rod (9) is slidably connected to a sliding column (10), one end of the sliding rod (9) is fixedly connected to a limit block (14), a sliding groove (12) is provided inside the limit block (14), the outer wall of the limit block (14) is slidably connected to the inside of the sliding groove (12), one side of the outer wall of the sliding column (10) is fixedly connected to a rotating block 2 (13), one side of the outer wall of the rotating block 2 (13) is rotatably connected to the inner wall of the outer shell (1), and the outer wall of the sliding rod (9) is provided with a buffer component.

2. The hydraulic cylinder buffer mechanism of the high-pressure hydraulic system of a milling machine according to claim 1, characterized in that: The buffer assembly comprises a spring 1 (11) and a spring 2 (15), wherein the spring 1 (11) and the spring 2 (15) are both sleeved on the outer wall of the slide rod (9), one end of the spring 1 (11) is fixedly connected to the outer wall of the rotating block 1 (8), and the other end of the spring 1 (11) is fixedly connected to the outer wall of the sliding column (10), one end of the spring 2 (15) is fixedly connected to one side of the outer wall of the limit block (14), and the other end of the spring 2 (15) is fixedly connected to the inner wall of the sliding column (10).

3. The hydraulic cylinder buffer mechanism of the high-pressure hydraulic system of a milling machine according to claim 1, characterized in that: The bottom of the outer shell (1) is slidably connected to a bottom cover (6), and a spacing gasket (7) is provided between the bottom cover (6) and the outer shell (1).

4. The hydraulic cylinder buffer mechanism of the high-pressure hydraulic system of a milling machine according to claim 3, characterized in that: The inner wall of the housing (1) is provided with a slot (16), and one side of the outer wall of the spacing gasket (7) is fixedly connected with an arc-shaped gasket (18).

5. The hydraulic cylinder buffer mechanism of the high-pressure hydraulic system of a milling machine according to claim 4, characterized in that: The outer wall of the arc-shaped gasket 1 (18) is slidably connected to the inside of the clamping groove 1 (16), the outer wall of the bottom cover (6) is provided with a clamping groove 3 (20), and the inside of the shell (1) is provided with a clamping groove 2 (17).

6. The hydraulic cylinder buffer mechanism of the high-pressure hydraulic system of a milling machine according to claim 5, characterized in that: The outer wall of the spacer gasket (7) is fixedly connected to an arc-shaped gasket 2 (19) which is symmetrical up and down. The outer wall of the arc-shaped gasket 2 (19) on one side is slidably connected to the inside of the second clamping groove (17), and the outer wall of the arc-shaped gasket 2 (19) on the other side is slidably connected to the inside of the third clamping groove (20).

7. The hydraulic cylinder buffer mechanism of the high-pressure hydraulic system of a milling machine according to claim 3, characterized in that: The bottom of the bottom cover (6) is fixedly connected to a fixing frame (24), the outer wall of the housing (1) is fixedly connected to a ring-shaped array of mounting columns (3), and the top of the fixing frame (24) is fixedly connected to a ring-shaped array of fixing columns (4).

8. The hydraulic cylinder buffer mechanism of the high-pressure hydraulic system of a milling machine according to claim 7, characterized in that: The top of the fixed column (4) is fixedly connected to a sliding column (21), the outer wall of the sliding column (21) is slidably connected to the inside of the installation column (3), the top of the sliding column (21) is fixedly connected to a threaded rod (22), and the outer wall of the threaded rod (22) is threadedly connected to a nut (23).

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