Middle pressurizing actuating structure

Abstract

The utility model belongs to the technical field of numerical control machine tool auxiliary devices, and particularly relates to a middle pressurization actuation structure which comprises a pressurization table body, a first sealing ring, a supporting ring, a second sealing ring and a U-shaped sealing ring. A first sealing groove is formed in the position, close to the air pressure side, in the shaft hole, and a first sealing ring and a supporting ring supporting the first sealing ring from the back are arranged in the first sealing groove. A second sealing groove is formed in the position, close to the first sealing groove, in the shaft hole. A second sealing ring and supporting rings located on the two sides of the second sealing ring are arranged in the second sealing groove. According to the unclamping cylinder, the piston rod is sealed through the first sealing ring, the second sealing ring and the U-shaped sealing ring, the supporting ring is arranged in a matched mode, the sealing rings are supported and limited through the supporting ring, the stability of the sealing rings can be guaranteed, therefore, the sealing effect is guaranteed, the situation of oil leakage is avoided, and the service life of the unclamping cylinder is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary devices for CNC machine tools, and specifically relates to an intermediate pressurization actuation structure. Background Technology

[0002] The tool changer is a common auxiliary device on CNC machine tools, used to assist in tool changing. It consists of two parts: a pneumatic cylinder and a hydraulic cylinder. The pneumatic cylinder's cylinder barrel and the hydraulic cylinder's cylinder barrel are connected by an intermediate connecting seat (pressure booster). When the tool changer moves downwards, air enters the upper chamber of the pneumatic cylinder, and the piston rod in the pneumatic cylinder barrel passes through the pressure booster and moves into the hydraulic cylinder barrel. The piston rod enters the hydraulic cylinder barrel and, through hydraulic pressure, drives the hydraulic rod in the hydraulic cylinder barrel to move in the direction of the piston rod's movement. When the tool changer returns to its original position, air enters the lower chamber of the pneumatic cylinder, and the piston rod in the pneumatic cylinder barrel moves away from the hydraulic rod. The hydraulic rod in the hydraulic cylinder barrel moves in the direction of the piston rod's movement.

[0003] To ensure the safety and reliability of the cutter cylinder and to prevent oil from entering the pneumatic cylinder during operation, a sealing structure is installed in the pressure booster.

[0004] A search revealed that Chinese utility model patent CN219605709U discloses a "sealing structure for a cutter cylinder intermediate flange and a cutter cylinder", which includes an intermediate flange and a piston rod. The intermediate flange has an axial through hole coaxial with the intermediate flange and a radial oil inlet hole that communicates with the through hole. The through hole has a first sealing groove and a second sealing groove, both of which are equipped with matching annular sealing rings. The piston rod passes through the through hole and slides and seals with the annular sealing rings in the first and second sealing grooves, which can effectively improve the sealing performance.

[0005] The intermediate flange sealing structure in the prior art, including the one mentioned above, only sets up a number of sealing rings for sealing. Although it can guarantee the sealing effect to a certain extent, in actual use, because the piston rod needs to reciprocate during operation, the sealing rings will wear down to a certain extent after long-term use. If the cutter cylinder continues to work, it will cause the sealing rings to vibrate or even shift in position, resulting in oil leakage.

[0006] To address the aforementioned issues, this application proposes an intermediate pressurization actuation structure. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides an intermediate pressurization actuation structure, which features convenient use, good sealing effect, and long service life.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an intermediate pressurization actuation structure, including a pressurization platform body, having a shaft hole penetrating both ends of the pressurization platform body, and also having an oil inlet hole communicating with the shaft hole and an air inlet hole communicating with the air pressure side, and further including a first sealing ring, a support ring, a second sealing ring and a U-shaped sealing ring;

[0009] A first sealing groove is provided in the shaft hole near the air pressure side, and a first sealing ring and a support ring supporting the first sealing ring from the back are provided in the first sealing groove.

[0010] A second sealing groove is provided in the shaft hole near the first sealing groove. A second sealing ring and support rings located on both sides of the second sealing ring are provided in the second sealing groove.

[0011] A No. 3 sealing groove is provided in the shaft hole near the oil pressure side, and a U-shaped sealing ring and a support ring supporting the U-shaped sealing ring from the back are provided in the No. 3 sealing groove;

[0012] The connection point between the oil inlet hole and the shaft hole is located inside the second sealing groove and the third sealing groove.

[0013] As a preferred technical solution of this utility model, it also includes:

[0014] The protrusion is fixed to the front of the support ring, and the inner ring surface of the protrusion is a limiting slope.

[0015] As a preferred technical solution of this utility model, it also includes:

[0016] A wear-resistant ring is fixed to the back of the support ring.

[0017] As a preferred embodiment of this utility model, the support ring, the protrusion, and the wear-resistant ring are integral structures formed by casting.

[0018] As a preferred embodiment of this utility model, the support ring, the protrusion, and the wear-resistant ring are cast polyurethane elastomers.

[0019] As a preferred embodiment of this utility model, both sides of the U-shaped sealing ring are inclined outwards, and both sides of the U-shaped sealing ring have a first guide slope and a second guide slope, which are used to make the two sides of the U-shaped sealing ring have a triangular structure.

[0020] As a preferred technical solution of this utility model, it also includes:

[0021] The No. 3 sealing ring has a No. 4 sealing groove on the outer wall of the main body of the pressurizing platform corresponding to the air pressure side, and the No. 3 sealing ring is set in the No. 4 sealing groove.

[0022] As a preferred technical solution of this utility model, it also includes:

[0023] The No. 4 sealing ring has a No. 5 sealing groove on the inner wall of the air inlet port, and the No. 4 sealing ring is disposed in the No. 5 sealing groove.

[0024] As a preferred technical solution of this utility model, it also includes:

[0025] The No. 5 sealing ring is located in the No. 6 sealing groove on the outer wall of the booster platform body, corresponding to the oil pressure side.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] In this invention, the piston rod is sealed by a No. 1 sealing ring, a No. 2 sealing ring, and a U-shaped sealing ring. In conjunction with the supporting ring, the sealing ring is supported and limited, which ensures the stability of the sealing ring, thereby ensuring the sealing effect, preventing oil leakage, and extending the service life of the cutter cylinder.

[0028] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the cross-sectional structure of the support ring in this utility model;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of the U-shaped sealing ring in this utility model.

[0033] In the diagram: 1. Main body of the booster platform; 11. Shaft hole; 12. Oil inlet hole; 13. No. 1 sealing groove; 14. No. 2 sealing groove; 15. No. 3 sealing groove; 16. No. 4 sealing groove; 17. Air inlet hole; 171. No. 5 sealing groove; 18. No. 6 sealing groove; 2. No. 1 sealing ring; 3. Support ring; 31. Protrusion; 311. Limiting slope; 32. Wear-resistant ring; 4. No. 2 sealing ring; 5. U-shaped sealing ring; 51. First guide slope; 52. Second guide slope; 6. No. 3 sealing ring; 7. No. 4 sealing ring; 8. No. 5 sealing ring. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figures 1-3 The present invention provides the following technical solution: an intermediate pressurization actuation structure, including a pressurization platform body 1, a shaft hole 11 through both ends of the pressurization platform body 1, an oil inlet hole 12 communicating with the shaft hole 11 and an air inlet hole 17 communicating with the air pressure side, and also includes a first sealing ring 2, a support ring 3, a second sealing ring 4 and a U-shaped sealing ring 5.

[0036] Furthermore, by Figures 1-3As shown, in this embodiment, a first sealing groove 13 is provided in the shaft hole 11 near the air pressure side. A first sealing ring 2 and a support ring 3 supporting the first sealing ring 2 from the back are provided in the first sealing groove 13. A second sealing groove 14 is provided in the shaft hole 11 near the first sealing groove 13. A second sealing ring 4 and support rings 3 located on both sides of the second sealing ring 4 are provided in the second sealing groove 14. A third sealing groove 15 is provided in the shaft hole 11 near the oil pressure side. A U-shaped sealing ring 5 and a support ring 3 supporting the U-shaped sealing ring 5 from the back are provided in the third sealing groove 15. The connection point between the oil inlet hole 12 and the shaft hole 11 is located between the second sealing groove 14 and the third sealing groove 15. With the above-mentioned scheme, the cylinder of the cutting tool cylinder is located on the air pressure side and fixedly connected to the main body 1 of the pressure booster during use. The oil cylinder of the cutting tool cylinder is located on the oil pressure side and fixedly connected to the main body 1 of the pressure booster. The piston rod of the cylinder passes through the shaft hole 11. The piston rod of the cylinder is sealed by the first sealing ring 2, the second sealing ring 4 and the U-shaped sealing ring 5. With the support ring 3, the support ring 3 supports and limits the first sealing ring 2, the second sealing ring 4 and the U-shaped sealing ring 5, which can ensure the stability of the first sealing ring 2, the second sealing ring 4 and the U-shaped sealing ring 5, thereby ensuring the sealing effect, avoiding oil leakage and extending the service life of the cutting tool cylinder.

[0037] When the piston of the cylinder moves to its furthest point, the end of the cylinder piston rod is inside the second sealing groove 14 and the third sealing groove 15, and in principle, the end of the cylinder piston rod also needs to pass over the oil inlet hole 12.

[0038] Preferably, by Figure 1 and Figure 2 As shown, this embodiment also includes a protrusion 31, which is fixed to the front of the support ring 3. The inner ring surface of the protrusion 31 is a limiting slope 311. With the above solution, during use, the first sealing ring 2, the second sealing ring 4 and the U-shaped sealing ring 5 will be partially embedded inside the protrusion 31. The limiting slope 311 is used to limit the first sealing ring 2, the second sealing ring 4 and the U-shaped sealing ring 5, ensuring the stability of the first sealing ring 2, the second sealing ring 4 and the U-shaped sealing ring 5.

[0039] Preferably, by Figure 1 and Figure 2 As shown, this embodiment also includes a wear-resistant ring 32, which is fixed to the back of the support ring 3. With the above design, for example, for the support ring 3 located in the first sealing groove 13, the wear-resistant ring 32 will abut against the inner wall of the first sealing groove 13, which can ensure stability, reduce wear after long-term operation, and also have an anti-slip effect.

[0040] Preferably, by Figure 1 and Figure 2As shown, in this embodiment, the support ring 3, the protrusion 31, and the wear-resistant ring 32 are integral structures formed by casting, resulting in high structural strength.

[0041] Optionally, by Figure 1 and Figure 2 As shown in this embodiment, the support ring 3, the protrusion 31, and the wear-resistant ring 32 are cast polyurethane elastomers, which have good temperature resistance, high strength, and a wide hardness range. Customers can design the cast polyurethane elastomers to a suitable hardness according to their needs.

[0042] Preferably, by Figure 1 and Figure 3 As shown in this embodiment, both sides of the U-shaped sealing ring 5 are inclined outwards, and both sides of the U-shaped sealing ring 5 have a first guide slope 51 and a second guide slope 52, which are used to make the two sides of the U-shaped sealing ring 5 have a triangular structure, which can be used to guide the piston rod. When the piston rod passes through the U-shaped sealing ring 5, both sides of the U-shaped sealing ring 5 will be squeezed and bent inwards, and tightly abut against the outer wall of the piston rod, resulting in a good sealing effect.

[0043] Preferably, by Figure 1 As shown, in this embodiment, it also includes: a third sealing ring 6, and a fourth sealing groove 16 at the position of the outer wall of the booster body 1 corresponding to the air pressure side. The third sealing ring 6 is disposed in the fourth sealing groove 16 and is used to seal the connection between the cylinder and the booster body 1.

[0044] Preferably, by Figure 1 As shown, in this embodiment, it also includes: a fourth sealing ring 7, and a fifth sealing groove 171 on the inner wall of the air inlet 17 port. The fourth sealing ring 7 is disposed in the fifth sealing groove 171 and is used to seal the connection of the air inlet pipe.

[0045] Preferably, by Figure 1 As shown, in this embodiment, it also includes: a No. 5 sealing ring 8, and a No. 6 sealing groove 18 at the position of the outer wall of the booster body 1 corresponding to the hydraulic side. The No. 5 sealing ring 8 is disposed in the No. 6 sealing groove 18 and is used to seal the connection between the cylinder barrel and the booster body 1.

[0046] Components not described in detail in this article are existing technologies.

[0047] The working principle and usage process of this utility model: When in use, the cylinder of the knife-cutting cylinder is located on the air pressure side and is fixedly connected to the main body of the pressure platform 1. The oil cylinder of the knife-cutting cylinder is located on the oil pressure side and is fixedly connected to the main body of the pressure platform 1. The piston rod of the cylinder passes through the shaft hole 11.

[0048] This invention utilizes a first sealing ring 2, a second sealing ring 4, and a U-shaped sealing ring 5 to seal the piston rod of the cylinder. A support ring 3 is also provided to support and limit the first sealing ring 2, the second sealing ring 4, and the U-shaped sealing ring 5, ensuring their stability and thus guaranteeing a good seal, preventing oil leakage, and extending the service life of the cylinder.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An intermediate pressurization actuation structure, comprising a pressurization platform body (1), wherein the pressurization platform body (1) has shaft holes (11) penetrating both ends of the pressurization platform body (1), and the pressurization platform body (1) also has an oil inlet hole (12) communicating with the shaft holes (11) and an air inlet hole (17) communicating with the air pressure side, characterized in that, It also includes a No. 1 sealing ring (2), a support ring (3), a No. 2 sealing ring (4), and a U-shaped sealing ring (5); A first sealing groove (13) is provided in the shaft hole (11) near the air pressure side. A first sealing ring (2) and a support ring (3) supporting the first sealing ring (2) from the back are provided in the first sealing groove (13). A second sealing groove (14) is provided in the shaft hole (11) near the first sealing groove (13). A second sealing ring (4) and support rings (3) located on both sides of the second sealing ring (4) are provided in the second sealing groove (14). A No. 3 sealing groove (15) is provided in the shaft hole (11) near the oil pressure side. A U-shaped sealing ring (5) and a support ring (3) supporting the U-shaped sealing ring (5) from the back are provided in the No. 3 sealing groove (15). The connection point between the oil inlet hole (12) and the shaft hole (11) is located inside the second sealing groove (14) and the third sealing groove (15).

2. The intermediate pressurization actuation structure according to claim 1, characterized in that: Also includes: The protrusion (31) is fixed to the front of the support ring (3), and the inner ring surface of the protrusion (31) is a limiting slope (311).

3. The intermediate pressurization actuation structure according to claim 2, characterized in that: Also includes: Wear-resistant ring (32) is fixed to the back of the support ring (3).

4. The intermediate pressurization actuation structure according to claim 3, characterized in that: The support ring (3), the protrusion (31), and the wear-resistant ring (32) are integral structures formed by casting.

5. The intermediate pressurization actuation structure according to claim 4, characterized in that: The support ring (3), the protrusion (31), and the wear-resistant ring (32) are cast polyurethane elastomers.

6. The intermediate pressurization actuation structure according to claim 1, characterized in that: Both sides of the U-shaped sealing ring (5) are inclined outward, and both sides of the U-shaped sealing ring (5) have a first guide slope (51) and a second guide slope (52) to make the two sides of the U-shaped sealing ring (5) have a triangular structure.

7. The intermediate pressurization actuation structure according to claim 1, characterized in that: Also includes: The No. 3 sealing ring (6) has a No. 4 sealing groove (16) on the outer wall of the booster body (1) corresponding to the air pressure side, and the No. 3 sealing ring (6) is disposed in the No. 4 sealing groove (16).

8. The intermediate pressurization actuation structure according to claim 1, characterized in that: Also includes: The No. 4 sealing ring (7) has a No. 5 sealing groove (171) on the inner wall of the air inlet (17) port, and the No. 4 sealing ring (7) is disposed in the No. 5 sealing groove (171).

9. The intermediate pressurization actuation structure according to claim 1, characterized in that: Also includes: The No. 5 sealing ring (8) has a No. 6 sealing groove (18) on the outer wall of the booster body (1) corresponding to the oil pressure side, and the No. 5 sealing ring (8) is disposed in the No. 6 sealing groove (18).

Images