Guide structure and tool breaking cylinder with same

Abstract

The utility model provides a kind of guiding structure and the tool breaking cylinder with it, guiding structure is applicable to tool breaking cylinder, tool breaking cylinder includes cylinder, oil cylinder, connecting seat, cylinder piston rod and oil cylinder piston rod, and cylinder is connected between oil cylinder by connecting seat connection.Guiding structure includes: first guide, it is set in oil cylinder, first guide includes guide portion, and the end of oil cylinder piston rod close to connecting seat is movably connected with guide portion cooperation;Second guide, it is set on the cylinder barrel inner wall of oil cylinder and is set in the end of oil cylinder piston rod away from connecting seat, to be guided and supported to oil cylinder piston rod by first guide and second guide;Wherein, first guide further includes first connecting part for being connected with oil cylinder and second connecting part for being connected with connecting seat, to make first guide relative tool breaking cylinder fixed.The utility model solves the problem that the piston rod of tool breaking cylinder in prior art only relies on single-point support, leading to the bending vibration of piston rod and the eccentric wear and leakage of sealing element.

Description

Technical Field

[0001] This utility model relates to the field of knife-cutting cylinder technology, and more specifically, to a guide structure and a knife-cutting cylinder having the same. Background Technology

[0002] Currently, in the field of machining, the tool-changing cylinder is an important component of machine tools, and its performance directly affects the machining accuracy and stability of the machine tool. In existing technologies, the piston rod of the tool-changing cylinder mainly adopts a single-point movable sleeve support at the head, which to a certain extent ensures the basic guiding requirements of the piston rod.

[0003] However, when the machine tool is undergoing high-speed tool changes or is subjected to eccentric loads, the piston rod is prone to bending vibration due to the lack of effective support at the tail end. This leads to uneven wear on the contact surface with the seals, causing oil leakage. Statistics show that this type of failure accounts for over 70% of all tool changer cylinder failures, severely impacting the normal operation and machining accuracy of the machine tool. Furthermore, the maintenance process for traditional tool changer cylinders is quite complex. In the event of a leak, the rear end cover, oil pipe, and drawbar need to be disassembled. This series of operations not only takes at least two hours, but also, during reassembly, the difficulty in ensuring positioning accuracy easily leads to alignment errors between the piston rod and the moving sleeve, further aggravating seal wear and reducing the service life of the tool changer cylinder. Utility Model Content

[0004] The main objective of this invention is to provide a guide structure and a cutter cylinder having the same, in order to solve the problem in the prior art where the piston rod of the cutter cylinder is supported by only a single point, resulting in bending and vibration of the piston rod and subsequent uneven wear and leakage of the seal.

[0005] To achieve the above objectives, according to one aspect of the present invention, a guide structure is provided, suitable for a knife-cutting cylinder. The knife-cutting cylinder includes a pneumatic cylinder, a hydraulic cylinder, a connecting seat, a pneumatic cylinder piston rod, and a hydraulic cylinder piston rod. The pneumatic cylinder and the hydraulic cylinder are connected by the connecting seat, which has a first through hole. The pneumatic cylinder piston rod passes through the first through hole to compress liquid and push the hydraulic cylinder piston rod. The guide structure includes: a first guide member disposed inside the hydraulic cylinder, the first guide member including a guide portion, the end of the hydraulic cylinder piston rod near the connecting seat being movably connected to the guide portion; and a second guide member disposed on the inner wall of the hydraulic cylinder barrel and sleeved on the end of the hydraulic cylinder piston rod away from the connecting seat, so as to guide and support the hydraulic cylinder piston rod through the first guide member and the second guide member; wherein the first guide member further includes a first connecting portion for connecting with the hydraulic cylinder and a second connecting portion for connecting with the connecting seat, so as to fix the first guide member relative to the knife-cutting cylinder.

[0006] Furthermore, the first guide member includes: a main body, a first connecting part and a second connecting part respectively disposed on the main body; the guide part is connected to the end of the main body away from the connecting seat, and a movable sleeve is disposed at the end of the cylinder piston rod near the connecting seat, the movable sleeve being movably sleeved on at least a portion of the guide part; wherein, the diameter of the main body is larger than the diameter of the guide part.

[0007] Furthermore, the connecting seat is provided with a liquid inlet channel, the main body is provided with a liquid guide hole communicating with the liquid inlet channel, and the outer peripheral wall of the guide part is provided with a first liquid guide groove communicating with the liquid guide hole, so that the oil flowing out of the liquid guide hole through the liquid inlet channel flows into the movable sleeve through the first liquid guide groove; wherein, the first liquid guide groove is an arc-shaped groove, and the diameter and center of the circle in which the first liquid guide groove is located are the same as the diameter and center of the liquid guide hole.

[0008] Furthermore, an installation portion is provided on the inner wall of the cylinder barrel of the hydraulic cylinder. The installation portion includes a first cylindrical surface, a second cylindrical surface, and a third cylindrical surface connected sequentially along the direction from the connecting seat to the hydraulic cylinder. The third cylindrical surface is located on the side of the first cylindrical surface away from the outer wall of the cylinder barrel. At least a portion of the connecting seat is engaged with the first cylindrical surface. The first connecting portion protrudes from the outer peripheral wall of the main body and is located at one end of the main body near the connecting seat. The first connecting portion is engaged with the second cylindrical surface, and the main body is engaged with the third cylindrical surface. The cross-sectional shape of the second cylindrical surface along the direction perpendicular to the axis of the hydraulic cylinder is a planar or arc-shaped surface.

[0009] Furthermore, the second connecting part includes a plurality of first connecting holes, and the connecting seat is provided with a plurality of second connecting holes that correspond one-to-one with the plurality of first connecting holes, so that the connecting component is sequentially inserted into the corresponding first connecting hole and second connecting hole, so that the first guide member is fixed relative to the connecting seat.

[0010] Furthermore, multiple second liquid guiding grooves are provided at intervals on the outer peripheral wall of the guide part, and each second liquid guiding groove is connected to the movable sleeve; and / or, the main body and the guide part are integrally formed structures.

[0011] Furthermore, the first guide member is provided with a plurality of first mounting grooves and a guide hole communicating with the first through hole. At least a portion of the cylinder piston rod is movably inserted into the guide hole. The plurality of first mounting grooves are spaced apart on the hole wall of the guide hole along the extension direction of the guide hole. The guide structure also includes a plurality of first seals, which are provided in correspondence with the plurality of first mounting grooves. Each first seal is disposed in the first mounting groove and sleeved on the cylinder piston rod.

[0012] Furthermore, the connecting seat is provided with a plurality of second mounting grooves, which are spaced apart on the wall of the first through hole along the extension direction of the first through hole. The guide structure also includes a plurality of second seals, which are provided in correspondence with the plurality of second mounting grooves. Each second seal is disposed in a second mounting groove and sleeved on the cylinder piston rod.

[0013] Furthermore, the cutting cylinder also includes a mounting base, which is located at the end of the hydraulic cylinder away from the pneumatic cylinder. The mounting base has a second through hole, through which the hydraulic cylinder piston rod is movably inserted. The mounting base has a third mounting groove, which is located on the wall of the second through hole. A second guide member is located in the third mounting groove and sleeved on the end of the hydraulic cylinder piston rod away from the connecting seat. The guide structure also includes a third sealing member. A fourth mounting groove is located on the outer peripheral wall of the hydraulic cylinder piston rod, and the third sealing member is located in the fourth mounting groove and abuts against the inner wall of the second guide member.

[0014] According to another aspect of the present invention, a knife-cutting cylinder is provided, including the aforementioned guide structure.

[0015] This invention provides a guiding structure suitable for a knife-cutting cylinder. The knife-cutting cylinder includes a pneumatic cylinder, a hydraulic cylinder, a connecting seat, a pneumatic cylinder piston rod, and a hydraulic cylinder piston rod. The pneumatic cylinder and the hydraulic cylinder are connected by the connecting seat, which has a first through hole. The pneumatic cylinder piston rod passes through the first through hole to compress liquid and push the hydraulic cylinder piston rod. The guiding structure includes: a first guide member disposed inside the hydraulic cylinder, comprising a guide portion, with the end of the hydraulic cylinder piston rod near the connecting seat movably connected to the guide portion; and a second guide member disposed on the inner wall of the hydraulic cylinder barrel and sleeved on the end of the hydraulic cylinder piston rod away from the connecting seat, for guiding and supporting the hydraulic cylinder piston rod through the first and second guide members. The first guide member further includes a first connecting portion for connecting to the hydraulic cylinder and a second connecting portion for connecting to the connecting seat, so that the first guide member is fixed relative to the knife-cutting cylinder.

[0016] Through the dual guiding design of the first and second guide members in this application, the first and second guide members act on both ends of the hydraulic cylinder piston rod, respectively, providing stable and precise guidance for the hydraulic cylinder piston rod. Their combined action reduces radial sway and vibration of the hydraulic cylinder piston rod during movement, ensuring high precision and stability of the tool-changing cylinder during tool changing or machining. Furthermore, the first guide member's guiding portion cooperates with the hydraulic cylinder piston rod, while the second guide member is fitted onto the end of the piston rod furthest from the connecting seat. This distributed support design effectively disperses the load on the hydraulic cylinder piston rod during movement, reduces single-point wear, and extends the service life of the guiding structure.

[0017] Furthermore, compared to the traditional single-guide structure, which concentrates the load on the cylinder piston rod at a single point, easily leading to wear and leakage, the dual-guide structure of this application can evenly distribute the load, reduce the stress on individual guide components, improve the motion accuracy of the cylinder piston rod, ensure machining quality, and extend the service life of the cutting cylinder. This solves the problem in existing technologies where the cutting cylinder piston rod relies on only a single point of support, causing piston rod bending vibration and resulting in uneven wear and leakage of the seals.

[0018] Furthermore, the first guide component is connected to the hydraulic cylinder via a first connecting part and to the connecting seat via a second connecting part, forming a stable fixed structure. This prevents the first guide component from moving during operation, ensuring the rigidity and guiding accuracy of the guide structure, significantly improving the stability and machining accuracy of the tool-changing cylinder, and enhancing the reliability and adaptability of the system. It is evident that this design not only ensures the stability of the first guide component but also allows for direct replacement of the first guide component during maintenance without disassembling the hydraulic cylinder or connecting seat, greatly simplifying maintenance operations and reducing maintenance costs and time. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A cross-sectional view from a first perspective is shown, provided by an embodiment of the knife-changing cylinder according to the present invention;

[0021] Figure 2 A cross-sectional view from a second perspective is shown, provided in an embodiment of the knife-changing cylinder according to the present invention;

[0022] Figure 3 A schematic diagram of the structure of the first guide member provided in an embodiment of the knife-cutting cylinder according to the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 1. Cylinder; 2. Hydraulic cylinder; 3. Connecting seat; 301. Second connecting hole; 302. Second mounting groove; 4. Cylinder piston rod; 5. Hydraulic cylinder piston rod; 6. Movable sleeve; 7. Liquid inlet channel; 8. Mounting seat; 801. Third mounting groove;

[0025] 10. First guide member; 11. Guide hole; 12. First connecting part; 13. Second connecting part; 130. First connecting hole; 14. Main body; 140. Liquid guiding hole; 141. First mounting groove; 15. Guide part; 150. First liquid guiding groove; 151. Second liquid guiding groove;

[0026] 20. Mounting section; 21. First cylindrical surface; 22. Second cylindrical surface; 23. Third cylindrical surface;

[0027] 30. First seal; 31. Second seal; 32. Third seal;

[0028] 40. Second guide component. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To address the problem in existing knife-cutting cylinders where the piston rod is supported only at a single point, leading to bending vibration of the piston rod and subsequent wear and leakage of the seals, this invention provides a guide structure and a knife-cutting cylinder incorporating it.

[0031] Please refer to Figures 1 to 3 As shown, one aspect of the technical solution of this utility model provides a guide structure suitable for a knife-cutting cylinder. The knife-cutting cylinder includes a cylinder 1, a hydraulic cylinder 2, a connecting seat 3, a cylinder piston rod 4, and a hydraulic cylinder piston rod 5. The cylinder 1 and the hydraulic cylinder 2 are connected by the connecting seat 3. The connecting seat 3 is provided with a first through hole. The cylinder piston rod 4 passes through the first through hole to squeeze liquid to push the hydraulic cylinder piston rod 5. The guide structure includes: a first guide member 10, which is disposed inside the hydraulic cylinder 2. The first guide member 10 includes a guide portion 15. The end of the hydraulic cylinder piston rod 5 near the connecting seat 3 is movably connected to the guide portion 15; a second guide member 40, which is disposed on the inner wall of the cylinder of the hydraulic cylinder 2 and sleeved on the end of the hydraulic cylinder piston rod 5 away from the connecting seat 3, so as to guide and support the hydraulic cylinder piston rod 5 through the first guide member 10 and the second guide member 40; wherein, the first guide member 10 also includes a first connecting portion 12 for connecting with the hydraulic cylinder 2 and a second connecting portion 13 for connecting with the connecting seat 3, so that the first guide member 10 is fixed relative to the knife-cutting cylinder.

[0032] Through the dual guiding design of the first guide member 10 and the second guide member 40 in this application, the first guide member 10 and the second guide member 40 act on both ends of the hydraulic cylinder piston rod 5, respectively, providing stable and precise guidance for the hydraulic cylinder piston rod 5. Under their combined action, the radial sway and vibration of the hydraulic cylinder piston rod 5 during movement are reduced, ensuring the high precision and stability of the tool changing cylinder during tool changing or machining. Furthermore, through the cooperation of the guiding part 15 of the first guide member 10 with the hydraulic cylinder piston rod 5, and the second guide member 40 being sleeved on the end of the piston rod away from the connecting seat 3, this distributed support design effectively disperses the load on the hydraulic cylinder piston rod 5 during movement, reduces single-point wear, and extends the service life of the guiding structure.

[0033] Furthermore, compared to the traditional single-guide structure, which concentrates the load on the cylinder piston rod 5 at a single point, easily leading to wear and leakage, the dual-guide structure of this application can evenly distribute the load, reduce the stress on individual guide components, improve the motion accuracy of the cylinder piston rod 5, ensure machining quality, and extend the service life of the cutting cylinder. This solves the problem in the prior art where the cutting cylinder piston rod relies on only a single point of support, leading to piston rod bending vibration and subsequent uneven wear and leakage of the seals.

[0034] Furthermore, the first guide member 10 is connected to the hydraulic cylinder 2 via the first connecting part 12 and to the connecting seat 3 via the second connecting part 13, forming a stable fixed structure. This prevents the first guide member 10 from moving during operation, ensuring the rigidity and guiding accuracy of the guide structure, significantly improving the stability and machining accuracy of the tool-changing cylinder, and enhancing the reliability and adaptability of the system. It is evident that this design not only ensures the stability of the first guide member 10, but also allows for direct replacement of the first guide member 10 during maintenance without disassembling the hydraulic cylinder 2 or the connecting seat 3, greatly simplifying maintenance operations and reducing maintenance costs and time.

[0035] In this embodiment, the first guide member 10 includes a main body 14 and a guide part 15. The first connecting part 12 and the second connecting part 13 are respectively disposed on the main body 14. The guide part 15 is connected to the end of the main body 14 away from the connecting seat 3. The piston rod 5 of the oil cylinder is provided with a movable sleeve 6 at the end near the connecting seat 3. The movable sleeve 6 is movably sleeved on at least a portion of the guide part 15. The diameter of the main body 14 is larger than the diameter of the guide part 15.

[0036] The main body 14 is fixedly connected to the hydraulic cylinder 2 and the connecting seat 3 via the first connecting part 12 and the second connecting part 13, respectively, so that the guide part 15 is fixed relative to the hydraulic cylinder 2 and more securely connected to the movable sleeve 6 on the hydraulic cylinder piston rod 5. When the hydraulic cylinder piston rod 5 works under high pressure, the guide part 15, which is securely connected to the hydraulic cylinder 2 and the connecting seat 3, can effectively disperse the pressure and support the hydraulic cylinder piston rod 5, thereby reducing the vibration and offset of the cylinder piston rod 4, improving the straightness of the movement and the machining accuracy, making the hydraulic cylinder piston rod 5 smoother during reciprocating motion, reducing axial sway, and enhancing the accuracy of guidance.

[0037] Furthermore, through the synergistic effect of the main body 14 and the guide 15, the first guide 10 can effectively cope with various loads and impacts during the machining process, improving the system reliability of the cutting cylinder under high-precision and high-intensity machining conditions. Even under extreme working conditions, the first guide 10 can ensure the stable movement of the cylinder piston rod 5, reducing equipment failures caused by guide failure. At the same time, the guide 15 forms a tight fit with the movable sleeve 6 on the cylinder piston rod 5, which helps to improve sealing, reduce oil leakage, and maintain the stability and efficiency of the hydraulic system. Moreover, the large diameter of the main body 14 can provide additional support, which is conducive to forming a stable sealing environment.

[0038] It is evident that the design of the first guide component 10 not only improves the guiding accuracy and stability of the hydraulic cylinder piston rod 5, but also optimizes the load distribution, simplifies the maintenance process, enhances the overall performance of the tool-changing cylinder, extends its service life, and reduces operating costs. When maintenance or replacement of the first guide component 10 is required, the connection method between the main body 14 and the hydraulic cylinder 2 and connecting seat 3 simplifies the maintenance process, allowing maintenance personnel to easily disassemble and assemble, reducing maintenance difficulty and costs, and improving maintenance efficiency.

[0039] In this embodiment, the connecting seat 3 is provided with a liquid inlet channel 7, the main body 14 is provided with a liquid guide hole 140 communicating with the liquid inlet channel 7, and the outer peripheral wall of the guide part 15 is provided with a first liquid guide groove 150 communicating with the liquid guide hole 140, so that the oil flowing out of the liquid inlet channel 7 and the liquid guide hole 140 flows into the movable sleeve 6 through the first liquid guide groove 150; wherein, the first liquid guide groove 150 is an arc-shaped groove, and the diameter and center of the circle in which the first liquid guide groove 150 is located are the same as the diameter and center of the liquid guide hole 140.

[0040] In this way, by providing a liquid guide hole 140 on the main body 14, which communicates with the liquid inlet channel 7 on the connecting seat 3, and by providing a first liquid guide groove 150 on the outer peripheral wall of the guide part 15, a smooth oil flow path can be formed from the liquid inlet channel 7 to the movable sleeve 6. This design ensures that the oil flowing out of the liquid guide hole 140 can flow into the movable sleeve 6 evenly and quickly, improving the flow efficiency and distribution uniformity of the oil. The arc-shaped first liquid guide groove 150 design not only avoids the guide hole to the greatest extent, but also reduces the resistance and turbulence during oil flow, preventing excessively high local pressure when the oil flows into the guide sleeve quickly, thereby avoiding the impact of pressure fluctuations on the movement stability of the cylinder piston rod 5. This makes the pressure distribution more uniform, helps maintain the linear movement of the cylinder piston rod 5, and improves machining accuracy.

[0041] Furthermore, this design, through improvements to the existing first guide member 10, eliminates the need for additional components or complex assembly, effectively utilizing the structure of the first guide member 10 itself to optimize oil flow. This not only simplifies the structure of the tool-changing cylinder but also helps control manufacturing costs.

[0042] like Figure 2 and Figure 3As shown, in this embodiment, an installation portion 20 is provided on the inner wall of the cylinder of the hydraulic cylinder 2. The installation portion 20 includes a first cylindrical surface 21, a second cylindrical surface 22, and a third cylindrical surface 23 connected sequentially along the direction from the connecting seat 3 to the hydraulic cylinder 2. The third cylindrical surface 23 is located on the side of the first cylindrical surface 21 away from the outer wall of the cylinder of the hydraulic cylinder 2. At least a portion of the connecting seat 3 is engaged with the first cylindrical surface 21. The first connecting portion 12 protrudes from the outer peripheral wall of the main body portion 14 and is located at one end of the main body portion 14 near the connecting seat 3. The first connecting portion 12 is engaged with the second cylindrical surface 22, and the main body portion 14 is engaged with the third cylindrical surface 23. The cross-sectional shape of the second cylindrical surface 22 along the direction perpendicular to the axis of the hydraulic cylinder 2 is a planar or arc-shaped surface.

[0043] The above configuration, through the mating connection between the first connecting part 12 and the second cylindrical surface 22, and the mating connection between the main body part 14 and the third cylindrical surface 23, forms a stable fixed structure. This structure can keep the first guide member 10 fixed relative to the hydraulic cylinder 2, thereby ensuring the stability of the first guide member 10 when subjected to high-pressure hydraulic fluid and the movement of the hydraulic cylinder piston rod 5, so as to provide precise guidance and stable support for the hydraulic cylinder piston rod 5, thereby improving the guiding accuracy of the hydraulic cylinder piston rod 5 and the machining accuracy of the cutting cylinder. Furthermore, the multi-segment design of the mounting part 20 can provide a larger contact area, thereby enhancing the load-bearing capacity between the first guide member 10 and the cylinder barrel of the hydraulic cylinder 2. In high-load machining environments, this design can effectively disperse stress, thereby reducing the wear of the first guide member 10 and the cylinder barrel of the hydraulic cylinder 2, and extending the service life of the cutting cylinder.

[0044] Furthermore, the mating connection design between the main body 14 and the third cylindrical surface 23 provides a tighter sealing surface, helping to reduce oil leakage and maintain the hydraulic stability of the system. By precisely controlling the gap between the first guide 10 and the inner wall of the cylinder 2, the sealing performance can be further optimized, reducing malfunctions caused by poor sealing. Meanwhile, the cross-sectional shape of the second cylindrical surface 22 is designed as a planar or curved surface, and the second connecting part 13 is also designed to match the shape of the second cylindrical surface 22, making the mating of the first connecting part 12 more flexible and facilitating the disassembly and replacement of the first guide 10. Compared to complex geometric shapes, planar or curved surfaces are more user-friendly for maintenance personnel, reducing maintenance difficulty and time, and providing a good mating connection effect.

[0045] It should be noted that, in this application, the cross-sectional shape of the second cylindrical surface 22 is not limited to this, and can be selected accordingly according to different usage requirements and actual working conditions. The shape of the first connecting part 12 is also set to match the cross-sectional shape of the second cylindrical surface 22.

[0046] In this embodiment, the three-section design of the mounting part 20 allows the first guide member 10 to be quickly disassembled and replaced without tools. It also supports the rapid replacement of first guide members 10 of different specifications (such as standard bushings, high-wear-resistant bushings, and corrosion-resistant bushings).

[0047] In this embodiment, both the first guide 10 and the second guide 40 are equipped with wear indicator marks (such as scale lines or color codes). The wear indicator marks provide intuitive feedback on the degree of wear of the first guide 10 and the second guide 40, allowing maintenance personnel to perform early detection and replacement before the first guide 10 and the second guide 40 wear to the point of affecting performance.

[0048] Specifically, the second connecting portion 13 includes a plurality of first connecting holes 130, and the connecting seat 3 is provided with a plurality of second connecting holes 301 corresponding to the plurality of first connecting holes 130. Connecting components are sequentially inserted into the corresponding first connecting holes 130 and second connecting holes 301 to fix the first guide member 10 relative to the connecting seat 3. The plurality of first connecting holes 130 are spaced apart along the circumferential direction of the main body 14 and are arranged to avoid the liquid guiding hole 140. Both the first connecting holes 130 and the second connecting holes 301 are threaded holes or pin holes.

[0049] In this way, by connecting multiple first connecting holes 130 with corresponding second connecting holes 301 using connecting components such as bolts or pins, a stable connection between the first guide member 10 and the connecting seat 3 can be ensured. This connection method can effectively prevent the first guide member 10 from shifting when impacted by high-pressure oil or when the cylinder piston rod 5 moves rapidly, maintaining the fixing accuracy of the first guide member 10, thus providing precise guidance and stable support for the cylinder piston rod 5, thereby improving the overall stability and machining accuracy of the cutting cylinder.

[0050] This connection method also makes the disassembly and replacement of the first guide component 10 more convenient. Simply loosen the corresponding connecting parts to easily remove the first guide component 10 for inspection or replacement. At the same time, the design of multiple first connecting holes 130 can adapt to different assembly requirements. For example, depending on different processing conditions or equipment designs, different numbers or positions of the first connecting holes 130 can be selected for connection, providing greater design flexibility.

[0051] In this embodiment, a plurality of second liquid guiding grooves 151 are provided at intervals on the outer peripheral wall of the guide portion 15, and each second liquid guiding groove 151 is connected to the movable sleeve 6.

[0052] The design of multiple second guide channels 151 ensures that after the oil flows out of the guide hole 140, it flows evenly to various parts within the movable sleeve 6 through the multiple second guide channels 151 and the first guide channel 150. This helps to balance the pressure distribution of the oil, improving the stability and efficiency of the machining process. Furthermore, the even distribution of oil through the second guide channels 151 prevents excessive oil accumulation in any area, thereby reducing the risk of localized overheating and extending the service life of the cylinder piston rod 5. Simultaneously, the design of multiple second guide channels 151 improves the flow characteristics of the oil, reduces flow resistance, and makes the oil flow smoother, contributing to improved response speed and control accuracy of the hydraulic system.

[0053] In this embodiment, the main body 14 and the guide part 15 are integrally formed structures.

[0054] The aforementioned design, with its one-piece molded structure, eliminates seams between different components, improves the overall structural strength and rigidity of the first guide component 10, reduces deformation under high pressure and high load conditions, and ensures the stability and reliability of the first guide component 10. It also reduces potential leakage points, especially at critical locations where the first guide component 10 contacts the inner wall of the cylinder 2, providing a tighter seal, reducing oil leakage, and maintaining the cleanliness and efficiency of the hydraulic system. Furthermore, the one-piece molded first guide component 10 reduces the number of parts in the assembly process, lowers production costs and assembly difficulty, improves production efficiency, and also reduces problems caused by improper assembly.

[0055] In this embodiment, the first guide member 10 is provided with a plurality of first mounting grooves 141 and a guide hole 11 communicating with the first through hole. At least a portion of the cylinder piston rod 4 is movably disposed in the guide hole 11. The plurality of first mounting grooves 141 are spaced apart on the hole wall of the guide hole 11 along the extension direction of the guide hole 11. The guide structure also includes a plurality of first sealing members 30. The plurality of first sealing members 30 are disposed in a one-to-one correspondence with the plurality of first mounting grooves 141. Each first sealing member 30 is disposed in the first mounting groove 141 and sleeved on the cylinder piston rod 4.

[0056] The arrangement of multiple first seals 30 provides sealing at multiple locations on the cylinder piston rod 4. Compared to a single first seal 30, this multi-point sealing design more effectively prevents oil or air leakage, improving the overall sealing performance of the cutter cylinder. Even if one first seal 30 wears down, the other first seals 30 can still maintain a good sealing effect, extending the working time of the cutter cylinder in a leak-free state.

[0057] Furthermore, distributing the first seals 30 within multiple first mounting grooves 141 on the wall of the guide hole 11 effectively disperses the wear and pressure on the first seals 30 during the movement of the cylinder piston rod 4. The pressure and wear borne by each first seal 30 are reduced, decreasing the risk of premature failure of a single first seal 30, thereby improving the service life of the first seals 30 and the reliability of the first guide 10. Simultaneously, multi-point sealing reduces radial offset of the cylinder piston rod 4 during movement, improving guiding accuracy. During high-precision machining, it ensures the linear movement of the cylinder piston rod 4, thereby improving machining quality and efficiency.

[0058] The design of the first mounting slot 141 makes the replacement of the first seal 30 more convenient. Maintenance personnel can replace the worn first seal 30 as needed without replacing the entire first guide 10, reducing maintenance costs and time. In addition, the design of multiple first seals 30 provides more maintenance options, allowing for selective replacement based on the wear condition of the first seal 30.

[0059] In this embodiment, the connecting seat 3 is provided with a plurality of second mounting grooves 302. The plurality of second mounting grooves 302 are spaced apart on the wall of the first through hole along the extension direction of the first through hole. The guide structure also includes a plurality of second sealing elements 31. The plurality of second sealing elements 31 are provided in a one-to-one correspondence with the plurality of second mounting grooves 302. Each second sealing element 31 is disposed in the second mounting groove 302 and sleeved on the cylinder piston rod 4.

[0060] Multiple second seals 31 can provide multi-layer sealing protection. Even if one second seal 31 wears or fails, the other second seals 31 can still continue to provide a sealing effect, which significantly improves the sealing performance of the entire system, effectively prevents oil or gas leakage, maintains the pressure stability of the hydraulic system, and improves the reliability and machining accuracy of the tool-changing cylinder.

[0061] Distributing the second seals 31 within multiple second mounting grooves 302 on the wall of the first through hole effectively disperses the load and pressure exerted by the cylinder piston rod 4 on the connecting seat 3 and the second seals 31 during movement. Reducing the pressure on each second seal 31 helps extend its service life and lowers maintenance costs. Furthermore, the multi-point sealing design reduces radial offset of the cylinder piston rod 4 during guiding motion, ensuring linear movement and improving guiding accuracy. This is particularly important for processing equipment requiring high-precision guidance, ensuring processing quality and production efficiency. Simultaneously, the second mounting grooves 302 facilitate the replacement of the second seals 31. Maintenance personnel can selectively replace the second seals 31 based on their wear level without replacing the entire connecting seat 3, reducing maintenance costs and time. This design also facilitates regular inspections, allowing for timely detection and replacement of worn second seals 31, preventing potential malfunctions.

[0062] In this embodiment, the cutting cylinder also includes a mounting base 8, which is located at the end of the hydraulic cylinder 2 away from the pneumatic cylinder 1. The mounting base 8 has a second through hole, and the hydraulic cylinder piston rod 5 is movably inserted into the second through hole. The mounting base 8 has a third mounting groove 801, which is located on the wall of the second through hole. The second guide member 40 is located in the third mounting groove 801 and sleeved on the end of the hydraulic cylinder piston rod 5 away from the connecting seat 3. The guide structure also includes a third sealing member 32. The outer peripheral wall of the hydraulic cylinder piston rod 5 has a fourth mounting groove, and the third sealing member 32 is located in the fourth mounting groove and abuts against the inner wall of the second guide member 40.

[0063] In this way, the second guide member 40 is disposed in the third mounting groove 801 of the mounting base 8, forming a fixed guiding relationship with the cylinder piston rod 5. The third sealing member 32 also cooperates with the fourth mounting groove on the outer peripheral wall of the cylinder piston rod 5, which not only plays a sealing role, but also assists the second guide member 40 in positioning and guiding the cylinder piston rod 5. The dual guiding design combined with the first guide member 10 improves the smoothness and accuracy of the movement of the cylinder piston rod 5, which is especially important for high-precision machining.

[0064] Furthermore, the third seal 32 directly abuts against the inner wall of the second guide 40, forming a tight sealing structure that effectively prevents oil leakage and maintains the stability and efficiency of the hydraulic system. This design is particularly suitable for high-pressure environments, ensuring the sealing performance of the cutter cylinder under prolonged and high-intensity use. By setting the first guide 10 and the second guide 40 at both ends of the cylinder piston rod 5, the stress during the movement of the cylinder piston rod 5 can be dispersed, reducing wear. At the same time, the combined action of the second guide 40 and the third seal 32 ensures the radial stability of the cylinder piston rod 5 during movement, reduces sway and vibration, and helps extend the service life of the cylinder piston rod 5 and the second guide 40.

[0065] In this embodiment, the first seal 30, the second seal 31 and the third seal 32 are all made of high temperature resistant and wear-resistant materials (such as fluororubber + polytetrafluoroethylene composite material).

[0066] In this embodiment, the cutting cylinder features a dual-stage pressure release mechanism with dual solenoid valves. This is achieved through a first channel and a second channel on the connecting seat 3. The first channel is a low-flow pressure relief port (1.5mm in diameter), with a small diameter and limited flow, allowing only slow pressure release. Its opening degree is controlled by a proportional electromagnet, enabling adjustable flow. The second channel is a high-flow exhaust port (6.0mm in diameter), with a large diameter, used for rapid venting of residual pressure, and only opens after the first stage is completed. The pressure relief time and pressure threshold can be set according to equipment load, temperature, and machining accuracy level to achieve a "personalized reset strategy."

[0067] In this application, by applying the guide structure of this embodiment, the motion accuracy of the hydraulic cylinder piston rod 5 is improved, and the processing quality is guaranteed; the tail end of the hydraulic cylinder piston rod 5 near the connecting seat 3 has a wobble of 0.2mm reduced to ≤0.05mm, a reduction of 80%.

[0068] According to another aspect of the present invention, a knife-cutting cylinder is provided, including the aforementioned guide structure.

[0069] Because the guide structure employs a dual-guide support and multi-point sealing design, it effectively reduces radial runout and axial vibration of the cylinder piston rod 5 during movement, thereby significantly improving guiding accuracy. This is especially important in applications requiring high-precision machining, ensuring machining quality and production efficiency.

[0070] The innovative design of the guide structure effectively extends the service life of the cutter cylinder by dispersing stress, reducing wear, and improving sealing. Reducing maintenance frequency and extending equipment life has a significant impact on lowering long-term operating costs and improving production continuity. Furthermore, the independent replaceable design of each component in the guide structure simplifies and speeds up maintenance. Worn seals or guide components can be replaced individually without disassembling the entire cutter cylinder, saving time and controlling costs. Simultaneously, the improved sealing and guiding performance reduces failures caused by improper maintenance.

[0071] Through the multi-layer sealing design (first seal 30, second seal 31 and third seal 32), not only is a tight seal provided when the cylinder piston rod 4 and the oil cylinder piston rod 5 move to prevent oil or gas leakage, but it can also adapt to different working conditions, such as high pressure, high temperature or corrosive environment, thus improving the overall sealing performance of the system.

[0072] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0073] Through the dual guiding design of the first guide member 10 and the second guide member 40 in this application, the first guide member 10 and the second guide member 40 act on both ends of the hydraulic cylinder piston rod 5, respectively, providing stable and precise guidance for the hydraulic cylinder piston rod 5. Under their combined action, the radial sway and vibration of the hydraulic cylinder piston rod 5 during movement are reduced, ensuring the high precision and stability of the tool changing cylinder during tool changing or machining. Furthermore, through the cooperation of the guiding part 15 of the first guide member 10 with the hydraulic cylinder piston rod 5, and the second guide member 40 being sleeved on the end of the piston rod away from the connecting seat 3, this distributed support design effectively disperses the load on the hydraulic cylinder piston rod 5 during movement, reduces single-point wear, and extends the service life of the guiding structure.

[0074] Furthermore, compared to the traditional single-guide structure, which concentrates the load on the cylinder piston rod 5 at a single point, easily leading to wear and leakage, the dual-guide structure of this application can evenly distribute the load, reduce the stress on individual guide components, improve the motion accuracy of the cylinder piston rod 5, ensure machining quality, and extend the service life of the cutting cylinder. This solves the problem in the prior art where the cutting cylinder piston rod relies on only a single point of support, leading to piston rod bending vibration and subsequent uneven wear and leakage of the seals.

[0075] Furthermore, the first guide member 10 is connected to the hydraulic cylinder 2 via the first connecting part 12 and to the connecting seat 3 via the second connecting part 13, forming a stable fixed structure. This prevents the first guide member 10 from moving during operation, ensuring the rigidity and guiding accuracy of the guide structure, significantly improving the stability and machining accuracy of the tool-changing cylinder, and enhancing the reliability and adaptability of the system. It is evident that this design not only ensures the stability of the first guide member 10, but also allows for direct replacement of the first guide member 10 during maintenance without disassembling the hydraulic cylinder 2 or the connecting seat 3, greatly simplifying maintenance operations and reducing maintenance costs and time.

[0076] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0077] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0078] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0079] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0080] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0081] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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. A guiding structure suitable for a cutting cylinder, the cutting cylinder comprising a pneumatic cylinder (1), a hydraulic cylinder (2), a connecting seat (3), a pneumatic cylinder piston rod (4), and a hydraulic cylinder piston rod (5), wherein the pneumatic cylinder (1) and the hydraulic cylinder (2) are connected via the connecting seat (3), the connecting seat (3) is provided with a first through hole, and the pneumatic cylinder piston rod (4) passes through the first through hole to squeeze liquid to push the hydraulic cylinder piston rod (5), characterized in that, The guiding structure includes: A first guide member (10) is disposed inside the oil cylinder (2). The first guide member (10) includes a guide portion (15). The end of the oil cylinder piston rod (5) near the connecting seat (3) is movably connected to the guide portion (15). The second guide (40) is disposed on the inner wall of the cylinder of the oil cylinder (2) and sleeved on the end of the oil cylinder piston rod (5) away from the connecting seat (3) so as to guide and support the oil cylinder piston rod (5) through the first guide (10) and the second guide (40); The first guide (10) further includes a first connecting part (12) and a second connecting part (13). The first connecting part (12) is used to connect with the oil cylinder (2), and the second connecting part (13) is used to connect with the connecting seat (3) so that the first guide (10) is fixed relative to the knife-cutting cylinder.

2. The guide structure according to claim 1, characterized in that, The first guide member (10) includes: The main body (14) is provided with the first connecting part (12) and the second connecting part (13) respectively; the guide part (15) is connected to the end of the main body (14) away from the connecting seat (3); the piston rod (5) of the oil cylinder is provided with a movable sleeve (6) at the end near the connecting seat (3); the movable sleeve (6) is movably fitted on at least part of the guide part (15); The diameter of the main body (14) is larger than the diameter of the guide (15).

3. The guide structure according to claim 2, characterized in that, The connecting seat (3) is provided with a liquid inlet channel (7), the main body (14) is provided with a liquid guide hole (140) communicating with the liquid inlet channel (7), and the outer peripheral wall of the guide part (15) is provided with a first liquid guide groove (150) communicating with the liquid guide hole (140), so that the oil flowing out of the liquid inlet channel (7) through the liquid guide hole (140) flows into the movable sleeve (6) through the first liquid guide groove (150); The first liquid guiding groove (150) is an arc-shaped groove, and the diameter and center of the circle containing the first liquid guiding groove (150) are the same as the diameter and center of the liquid guiding hole (140).

4. The guide structure according to claim 2, characterized in that, The cylinder (2) has an installation part (20) on its inner wall. The installation part (20) includes a first cylindrical surface (21), a second cylindrical surface (22), and a third cylindrical surface (23) connected sequentially along the direction from the connecting seat (3) to the cylinder (2). The third cylindrical surface (23) is located on the side of the first cylindrical surface (21) away from the outer wall of the cylinder (2). At least a portion of the connecting seat (3) is connected to the first cylindrical surface (21). The first connecting part (12) protrudes from the outer peripheral wall of the main body (14) and is located at one end of the main body (14) near the connecting seat (3). The first connecting part (12) is connected to the second cylindrical surface (22), and the main body (14) is connected to the third cylindrical surface (23). The cross-sectional shape of the second cylindrical surface (22) along the direction perpendicular to the axis of the oil cylinder (2) is a planar or arc-shaped surface.

5. The guide structure according to claim 1, characterized in that, The second connecting part (13) includes a plurality of first connecting holes (130), and the connecting seat (3) is provided with a plurality of second connecting holes (301) corresponding to the plurality of first connecting holes (130) in turn, so that the connecting member is sequentially inserted into the corresponding first connecting hole (130) and second connecting hole (301) so that the first guide member (10) is fixed relative to the connecting seat (3).

6. The guide structure according to claim 2, characterized in that, The outer peripheral wall of the guide portion (15) is provided with a plurality of second liquid guiding grooves (151) spaced apart, and each of the second liquid guiding grooves (151) is in communication with the movable sleeve (6); and / or, The main body (14) and the guide (15) are integrally formed structures.

7. The guide structure according to claim 1, characterized in that, The first guide member (10) is provided with a plurality of first mounting grooves (141) and a guide hole (11) communicating with the first through hole. At least a portion of the cylinder piston rod (4) is movably inserted into the guide hole (11). The plurality of first mounting grooves (141) are spaced apart on the hole wall of the guide hole (11) along the extending direction of the guide hole (11). The guide structure further includes: Multiple first seals (30) are provided one-to-one with the multiple first mounting grooves (141), and each first seal (30) is disposed in the first mounting groove (141) and sleeved on the cylinder piston rod (4).

8. The guide structure according to claim 1, characterized in that, The connecting seat (3) is provided with a plurality of second mounting grooves (302), which are spaced apart on the wall of the first through hole along the extending direction of the first through hole. The guide structure further includes: Multiple second seals (31) are provided one-to-one with the multiple second mounting grooves (302), and each second seal (31) is disposed in the second mounting groove (302) and sleeved on the cylinder piston rod (4).

9. The guide structure according to claim 1, characterized in that, The cutting cylinder also includes a mounting base (8), which is located at the end of the oil cylinder (2) away from the pneumatic cylinder (1). The mounting base (8) has a second through hole, and the oil cylinder piston rod (5) is movably inserted into the second through hole. The mounting base (8) has a third mounting groove (801), which is located on the wall of the second through hole. The second guide member (40) is located in the third mounting groove (801) and sleeved on the end of the oil cylinder piston rod (5) away from the connecting seat (3). The guide structure also includes: The third seal (32) is provided in the fourth mounting groove on the outer peripheral wall of the cylinder piston rod (5), and the third seal (32) is disposed in the fourth mounting groove and abuts against the inner wall of the second guide (40).

10. A knife-beating cylinder, characterized in that, The guide structure includes any one of claims 1 to 9.

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