Hollow oil cylinder for leveler

Abstract

The utility model relates to the field of oil cylinders, in particular to a hollow oil cylinder for a leveler, which comprises a cylinder body assembly, a cylinder head and a cylinder tail are respectively arranged on two sides of the cylinder body assembly, a piston component is slidably arranged in the cylinder body assembly, a sleeve is arranged in the middle between the cylinder tail and the piston component, and a threaded sleeve is arranged in the middle of the other side in the piston component. And the middle parts of the screw sleeve and the sleeve are hollow. According to the utility model, through the arrangement of the Glyd ring, the dustproof ring, the first rod seal and the first O-shaped ring, the sealing performance after the cylinder body assembly, the cylinder head, the cylinder tail and the piston rod assembly are assembled is ensured, the oil leakage phenomenon is prevented, the piston is supported through the two second guide rings, the radial force is borne, the piston and the cylinder body assembly are prevented from being in direct metal contact and abraded, and the service life of the piston is prolonged. In addition, the piston rod is supported through the first guide ring, the radial load is borne, and the rod and a cylinder head hole are kept concentric.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a hollow hydraulic cylinder for a leveling machine. Background Technology

[0002] A hollow hydraulic cylinder for a leveling machine is a hydraulic actuator specifically designed for leveling machines. Its internal structure is hollow, allowing hydraulic oil to flow through the hollow portion, enabling bidirectional hydraulic drive during operation.

[0003] The existing hollow cylinders used in some leveling machines have weak sealing performance and rigidity. After a period of use, they are deformed due to the large pressure and friction, which can easily lead to a decrease in sealing performance and oil leakage. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a hollow hydraulic cylinder for a leveling machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hollow hydraulic cylinder for a leveling machine includes a cylinder body assembly. A cylinder head and a cylinder tail are respectively provided on both sides of the cylinder body assembly. A piston assembly is slidably arranged inside the cylinder body assembly. A sleeve is provided in the middle between the cylinder tail and the piston assembly. A threaded sleeve is provided in the middle of the other side of the piston assembly. The middle of both the threaded sleeve and the sleeve is hollow.

[0007] Furthermore, in a preferred configuration, the piston rod assembly includes a piston rod, a piston is disposed on one outer wall of the piston rod, and the piston and piston rod are connected by a plurality of first fastening screws.

[0008] Furthermore, in a preferred configuration, a Gladley ring is embedded in the middle of the outer wall of the piston, and the outer end face of the Gladley ring is flush with the outer end face of the piston.

[0009] Furthermore, in a preferred configuration, a second guide ring is embedded on both sides of the outer wall of the piston and on both sides of the glyph, and the outer end face of the second guide ring is flush with the outer end face of the piston.

[0010] In addition, a preferred structure is that the piston rod has a first groove on the side near the cylinder tail and at the sleeve, and a second rod seal and a step seal are sequentially embedded in the first groove, with the step seal located on the side near the cylinder tail.

[0011] Furthermore, in a preferred configuration, the cylinder head and cylinder body assembly are connected by a plurality of internal hexagonal screws, and a first O-ring is embedded in the outer wall of the cylinder head, with the outer end face of the first O-ring flush with the outer end face of the cylinder head.

[0012] In addition, a preferred structure is that a second groove is provided in the cylinder head at the piston rod, and a dustproof ring, a first rod seal, and a first guide ring are sequentially embedded in the second groove, with the first guide ring located on the side closer to the piston.

[0013] Furthermore, in a preferred configuration, the threaded sleeve, the bushing, and the piston rod are all connected by a plurality of second fastening screws.

[0014] Furthermore, in a preferred configuration, a first oil port is provided on one side of the outer wall of the cylinder head, a second oil port is provided on the side of the cylinder head near the piston, and a flow channel is provided inside the cylinder head between the first and second oil ports. A third oil port is provided on one side of the outer wall of the cylinder assembly, and a screw plug is provided on both the outer wall of the cylinder assembly at the third oil port and the outer wall of the cylinder head at the first oil port.

[0015] The beneficial effects of this utility model are as follows:

[0016] In this invention, the installation of a Glyd ring, a dust seal, a first rod seal, and a first O-ring ensures the sealing of the cylinder block assembly, cylinder head, cylinder tail, and piston rod assembly after assembly, preventing oil leakage. Two second guide rings support the piston, bearing radial force and preventing direct metal-to-metal contact and wear between the piston and cylinder block assembly, keeping the piston centered. Furthermore, the first guide ring supports the piston rod, bearing radial load and ensuring concentricity between the rod and the cylinder head bore. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the hollow hydraulic cylinder for the leveling machine proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the hollow hydraulic cylinder for the leveling machine proposed in this utility model.

[0019] In the diagram: 1. Cylinder head, 2. Piston rod, 3. Cylinder block assembly, 4. Piston, 5. Cylinder tail, 6. Sleeve, 7. Sleeve, 8. Dust seal, 9. First rod seal, 10. First guide ring, 11. First O-ring, 13. Second guide ring, 14. Glyd ring, 15. Plug, 16. First fastening screw, 17. Second fastening screw, 18. Socket head cap screw, 19. Second rod seal, 20. Step seal, 21. Second O-ring, 22. Third O-ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-2A hollow hydraulic cylinder for a leveling machine includes a cylinder assembly 3. A cylinder head 1 and a cylinder tail 5 are respectively provided on both sides of the cylinder assembly 3. A piston assembly is slidably arranged inside the cylinder assembly 3. A sleeve 7 is provided in the middle between the cylinder tail 5 and the piston assembly. A threaded sleeve 6 is provided in the middle of the other side of the piston assembly. The middle of both the threaded sleeve 6 and the sleeve 7 is hollow.

[0022] Meanwhile, the piston rod assembly includes a piston rod 2, a piston 4 is provided on one side of the outer wall of the piston rod, and the piston 4 and the piston rod 2 are connected by a plurality of first fastening screws 16.

[0023] Meanwhile, a Glyd ring 14 is embedded in the middle of the outer wall of the piston 4, and the outer end face of the Glyd ring 14 is flush with the outer end face of the piston 4. The Glyd ring 14 provides the main seal for the piston 4.

[0024] Furthermore, a second guide ring 13 is embedded on both sides of the outer wall of the piston 4, located on the glyph 14, and the outer end face of the second guide ring 13 is flush with the outer end face of the piston 4. The two second guide rings 13 support the piston 4, withstand radial force, prevent direct metal-to-metal contact and wear between the piston 4 and the cylinder assembly 3, and maintain the piston's centered operation. Simultaneously, a third sliding groove is formed inside the cylinder assembly 3 at the piston 4, and the outer wall of the piston 4 fits against the inner wall of the third sliding groove.

[0025] Furthermore, a first groove is provided on the piston rod 2 near the cylinder tail 5 and at the sleeve 7, and a second rod seal 19 and a step seal 20 are sequentially embedded in the first groove, with the step seal 20 located on the side near the cylinder tail 5.

[0026] Meanwhile, the cylinder head 1 and the cylinder body assembly 3 are connected by multiple hexagon socket screws 18, and a first O-ring 11 is embedded in the outer wall of the cylinder head 1, and the outer end face of the first O-ring is flush with the outer end face of the cylinder head 1.

[0027] Furthermore, a second groove is provided inside the cylinder head 1 at the piston rod 2. A dustproof ring 8, a first rod seal 9, and a first guide ring 10 are sequentially embedded in the second groove. The first guide ring 10 is located on the side closer to the piston 4. The dustproof ring 8 prevents external dust, chips, moisture, and other contaminants from entering the cylinder assembly 3 and also prevents oil leakage. The first rod seal 9 further prevents oil leakage. The first guide ring 10 supports the piston rod 2, bears radial load, and keeps the rod concentric with the cylinder head bore.

[0028] Furthermore, the threaded sleeve 6, the sleeve 7, and the piston rod 2 are all connected by multiple second fastening screws 17.

[0029] Furthermore, a first oil port is opened on one side of the outer wall of the cylinder head 1, a second oil port is opened on the side of the cylinder head 1 near the piston, and a flow channel is opened inside the cylinder head 1 between the first oil port and the second oil port. A third oil port is opened on one side of the outer wall of the cylinder assembly 3, and a screw plug 15 is provided on both the outer wall of the cylinder assembly 3 at the third oil port and the outer wall of the cylinder head 1 at the first oil port.

[0030] In this invention, the installation of the Glyd ring 14, dustproof ring 8, first rod seal 9, and first O-ring 11 ensures the sealing of the cylinder assembly 3, cylinder head 1, cylinder tail 5, and piston rod assembly after assembly, preventing oil leakage. The two second guide rings 13 support the piston 4, bear the radial force, prevent direct metal-to-metal contact and wear between the piston 4 and the cylinder assembly 3, and keep the piston running in the center. The first guide ring 10 supports the piston rod 2, bears the radial load, and keeps the rod concentric with the cylinder head bore.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hollow hydraulic cylinder for a leveling machine, comprising a cylinder body assembly (3), characterized in that, The cylinder assembly (3) is provided with a cylinder head (1) and a cylinder tail (5) on both sides respectively. A piston assembly is slidably provided inside the cylinder assembly (3). A sleeve (7) is provided in the middle between the cylinder tail (5) and the piston assembly. A threaded sleeve (6) is provided in the middle of the other side of the piston assembly. The middle of the threaded sleeve (6) and the sleeve (7) are both hollow. The piston assembly includes a piston rod (2), a piston (4) is provided on one side of the outer wall of the piston rod, and the piston (4) and the piston rod (2) are connected by a plurality of first fastening screws (16). A glyph ring (14) is embedded in the middle of the outer wall of the piston (4), and the outer wall end face of the glyph ring (14) is flush with the outer wall end face of the piston (4). The piston rod (2) has a first groove on the side near the cylinder tail (5) and located at the sleeve (7), and a second rod seal (19) and a step seal (20) are sequentially embedded in the first groove, and the step seal (20) is located on the side near the cylinder tail (5); The cylinder head (1) and the cylinder body assembly (3) are connected by a plurality of internal hexagon screws (18), and a first O-ring (11) is embedded in the outer wall of the cylinder head (1), and the outer wall end face of the first O-ring is flush with the outer wall end face of the cylinder head (1).

2. The hollow hydraulic cylinder for a leveling machine according to claim 1, characterized in that, The piston (4) has a second guide ring (13) embedded on both sides of the outer wall of the piston (4) and the outer wall end face of the second guide ring (13) is flush with the outer wall end face of the piston (4).

3. The hollow hydraulic cylinder for a leveling machine according to claim 1, characterized in that, The cylinder head (1) has a second groove located at the piston rod (2). The second groove is sequentially fitted with a dustproof ring (8), a first rod seal (9), and a first guide ring (10), and the first guide ring (10) is located on the side close to the piston (4).

4. The hollow hydraulic cylinder for a leveling machine according to claim 1, characterized in that, The threaded sleeve (6), the sleeve (7) and the piston rod (2) are all connected by a plurality of second fastening screws (17).

5. The hollow hydraulic cylinder for a leveling machine according to claim 1, characterized in that, A first oil port is opened on one side of the outer wall of the cylinder head (1), a second oil port is opened on the side of the cylinder head (1) near the piston, and a flow channel is opened in the cylinder head (1) between the first oil port and the second oil port. A third oil port is opened on one side of the outer wall of the cylinder assembly (3), and a screw plug (15) is provided on the outer wall of the cylinder assembly (3) at the third oil port and on the outer wall of the cylinder head (1) at the first oil port.

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