Flexible carrying frame oil cylinder

Abstract

The utility model relates to a flexible type carrying frame oil cylinder which comprises a cylinder barrel, a piston rod, a piston, an oil hole and a connecting mechanism, the cylinder barrel is transversely arranged, a cylinder bottom is arranged at the left end of the cylinder barrel, a cylinder cover is arranged at the right end of the cylinder barrel, the piston rod penetrates through the inner peripheries of the cylinder barrel and the cylinder cover, the piston is arranged on the tail side of the left end of the piston rod, and the tail side of the right end of the piston rod is connected with the connecting mechanism. The oil holes comprise a first oil hole which penetrates through the cylinder bottom and is communicated with the inner circumference of the cylinder barrel and a second oil hole which is positioned at the left end of the cylinder cover, penetrates through the cylinder barrel and is communicated with the inner circumference of the cylinder barrel. According to the utility model, a connecting mechanism in which the tabs are matched with the knuckle bearing is adopted, a bidirectional hydraulic oil inlet and outlet design is adopted, and a multi-sealing guide device and a buffer design are adopted, so that the movement precision and the control stability are improved, the structural strength is high, and the wear resistance is strong; the hydraulic cylinder has the beneficial effects of high flexibility and applicability, capability of accurately controlling the movement of the piston rod and remarkably improved durability.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a flexible carrier cylinder. Background Technology

[0002] In the field of existing hydraulic cylinder technology, although hydraulic cylinders are widely used in various mechanical equipment, there are still many problems that limit their performance and application scope.

[0003] I. Insufficient flexibility and applicability

[0004] Limited Connection Methods: Traditional hydraulic cylinders typically have simple connection mechanisms, mostly using rigid connections and lacking oscillating adjustment structures like those using lugs and spherical bearings. This leads to stress concentration between the cylinder and the external structure when there are installation errors or load changes during operation. In severe cases, this can damage the cylinder or cause it to malfunction, making it unsuitable for complex and changing working environments. Limited Hydraulic Circuit Design: Some existing hydraulic cylinders only allow for unidirectional oil supply or have inflexible supply methods, failing to meet the diverse needs of bidirectional piston rod movement in actual work. This limits the application of hydraulic cylinders in scenarios requiring frequent changes in movement direction.

[0005] II. Poor control precision

[0006] Poor sealing and guiding performance: Many traditional hydraulic cylinders have inadequate sealing and guiding device designs, employing only simple sealing structures that cannot effectively prevent hydraulic oil leakage, leading to unstable system pressure and consequently affecting the piston rod's motion accuracy. Simultaneously, due to the lack of precise guiding structures, the piston rod is prone to wobbling or deviating during movement, compromising the motion accuracy of external structures driven by the piston rod and failing to meet the demands of modern industrial production with high motion precision requirements. Lack of cushioning measures: Most existing hydraulic cylinders do not consider cushioning during piston movement in their structural design. Direct collisions between the piston and cylinder bottom during movement can easily occur, generating significant impact forces. This not only affects the cylinder's motion smoothness but also damages internal components, reducing the cylinder's lifespan and hindering precise control of external structure movements.

[0007] 3. Poor durability

[0008] Hydraulic pipe quality issues: Traditional hydraulic cylinders often use ordinary hydraulic pipes, which are insufficient in terms of strength and sealing, making them prone to cracking and leakage. This leads to hydraulic oil leakage, which not only pollutes the working environment but also causes the cylinder to malfunction due to lack of oil, requiring frequent pipe replacements and increasing equipment maintenance costs and downtime. Inadequate structural design and dust prevention measures: The cylinder bottom structure of traditional hydraulic cylinders is often poorly designed, making them prone to deformation under significant external forces, affecting the overall performance and service life of the cylinder. Furthermore, many hydraulic cylinders do not prioritize dust prevention, lacking effective dust control measures. This allows external dust to easily enter the cylinder, accelerating the wear of internal components and resulting in poor cylinder durability. Utility Model Content

[0009] To address the problems mentioned in the background section, this utility model provides a flexible carrier cylinder, aiming to solve the technical problems of insufficient flexibility, poor control precision, and poor durability of existing carrier cylinders. By adopting a connection mechanism with a lug and a spherical bearing, and a bidirectional hydraulic oil inlet / outlet design, the problems of poor adaptability to installation errors and changes in working conditions, and a single oil circuit, are solved. Multiple sealing guide devices and a buffer design improve motion precision and control stability. High-quality seamless oil pipes, a reasonable cylinder bottom structure design, and multiple dustproof seals enhance structural strength and wear resistance. This achieves the beneficial effects of strong flexibility, precise control of piston rod movement, and significantly improved durability, broadening the application range of cylinders, meeting high-precision work requirements, and reducing maintenance costs and downtime.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a flexible carrier cylinder, comprising a cylinder barrel, a piston rod, a piston, an oil hole, and a connecting mechanism. The cylinder barrel is arranged horizontally, with a cylinder bottom at its left end and a cylinder cover at its right end. The piston rod passes through the inner circumference of the cylinder barrel and the cylinder cover and can move left and right relative to the cylinder barrel. The piston is located at the left end of the piston rod, and the connecting mechanism is connected to the right end of the piston rod for connecting with an external structure. Under the driving action of the piston rod, the external structure performs corresponding movements. The oil hole includes a first oil hole that penetrates the cylinder bottom and communicates with the inner circumference of the cylinder barrel, and a second oil hole located at the left end of the cylinder cover that penetrates the cylinder barrel and communicates with its inner circumference. The first oil hole and the second oil hole cooperate to allow hydraulic oil to enter and exit the inner circumference of the cylinder barrel, causing the piston rod to move left and right relative to the cylinder barrel.

[0011] As a further explanation of this technical solution:

[0012] Preferably, the connecting mechanism includes a pole lug and a spherical bearing. The pole lug is connected to the spherical bearing and works with the spherical bearing to cause the cylinder to swing, so as to compensate for installation errors and relative displacement caused by load changes during operation.

[0013] Preferably, the connecting mechanism further includes a connector, and the right end of the piston rod is provided with a connecting hole that matches the shape of the connector. The connector is inserted into the connecting hole so that the electrode tab is connected to the right end of the piston rod.

[0014] Preferably, the cylinder has a mounting part on the outer periphery of the middle part, which is used to connect with an external mechanism to fix the cylinder. The cross-section of the cylinder bottom is a transverse convex shape, with its right end matching the shape of the cylinder and both the upper and lower sides of the left end protruding inward to cooperate with the mounting part to connect with the external mechanism to fix the cylinder.

[0015] Preferably, the first oil hole and the second oil hole are connected by an oil pipe, which is a seamless oil pipe used to cooperate with the first oil hole and the second oil hole to allow hydraulic oil to enter and exit the inner circumference of the cylinder.

[0016] Preferably, a first piston sealing ring and a piston sealing guide band are sequentially provided from left to right between the outer circumference of the piston and the inner circumference of the cylinder. A second piston sealing ring and a third piston sealing ring are sequentially provided from left to right between the middle inner circumference of the piston and the piston rod. The first, second, and third piston sealing rings cooperate to prevent hydraulic oil entering the inner circumference of the cylinder from the first oil hole from seeping to the right end of the piston. The piston sealing guide band is used to guide the piston when it moves left and right. A first piston rod guide band and a third piston sealing guide band are sequentially provided from left to right between the inner circumference of the cylinder head and the piston rod. The cylinder head includes a piston rod seal ring, a second piston rod seal ring, a second piston rod guide band, a first dustproof ring, and a second dustproof ring. From left to right, a cylinder head seal ring and a third dustproof ring are provided between the outer circumference of the cylinder head and the inner circumference of the cylinder barrel. The first dustproof ring, the second dustproof ring, and the third dustproof ring are used to prevent external dust from entering the inner circumference of the cylinder barrel. The first piston rod guide band and the second piston rod guide band cooperate with each other to guide the piston rod when it moves left and right. The first piston rod seal ring and the second piston rod seal ring prevent hydraulic oil entering the inner circumference of the cylinder barrel through the second oil hole from seeping outside the cylinder head.

[0017] Preferably, the right end of the cylinder bottom is provided with a buffer hole that is recessed to the left, and the left end of the piston is provided with a buffer block whose shape matches the buffer hole, which is used to buffer the piston when the piston rod moves to the left.

[0018] Preferably, the cylinder has a left-right length of 560.0mm to 570.0mm, an outer diameter of 110.0mm to 118.0mm, an inner diameter of 86.0mm to 94.0mm, a piston rod diameter of 45.0mm to 55.0mm, a left-right length of 435.0mm to 445.0mm, a piston length of 55.0mm to 65.0mm, a cylinder head length of 75.0mm to 85.0mm, a connector length of 50.0mm to 60.0mm, an oil pipe diameter of 15.0mm to 21.0mm, and a mounting portion length of 15.0mm to 25.0mm.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] Firstly, this utility model boasts strong flexibility and applicability. Firstly, its connecting mechanism compensates for displacement. The cylinder, through the engagement of the pole lugs and spherical bearings in the connecting mechanism, allows the cylinder barrel to swing. In practical applications, installation errors are inevitable, and during operation, load variations can cause relative displacement between components. Most existing cylinders lack such an adjustment mechanism, while this cylinder effectively compensates for these installation errors and relative displacements, ensuring a consistently good connection between the cylinder and the external structure. This allows the cylinder to operate normally under various working conditions, greatly improving its flexibility and applicability and broadening its application range. Secondly, this utility model employs a bidirectional hydraulic oil inlet and outlet design. The first and second oil holes cooperate with each other, combined with seamless oil pipes, to achieve the inlet and outlet of hydraulic oil within the cylinder barrel, allowing the piston rod to move flexibly left and right. Compared to some existing cylinders with unidirectional oil supply or unreasonable oil circuit designs, this design more flexibly meets different working needs, efficiently pushing or pulling external structures, further enhancing the cylinder's applicability in complex working environments.

[0021] Secondly, this utility model's multi-seal guiding device ensures motion precision. Multiple sealing and guiding devices are installed between the piston and cylinder, the piston and piston rod, and the cylinder head and piston rod. These include a first piston seal ring and a piston sealing guide band between the outer circumference of the piston and the inner circumference of the cylinder; a second piston seal ring and a third piston seal ring between the inner circumference of the piston and the piston rod; and a first piston rod guide band and a second piston rod guide band between the inner circumference of the cylinder head and the piston rod. These devices work together to effectively prevent hydraulic oil leakage, ensure stable system pressure, and provide precise guidance during piston rod and piston movement. This significantly improves the accuracy of cylinder movement and makes the movement of external structures driven by the piston rod more precise, meeting the requirements of high motion precision in working scenarios.

[0022] Thirdly, the buffer design of this utility model improves control stability. The buffer hole set at the bottom of the cylinder matches the buffer block at the left end of the piston. When the piston rod moves to the left, the buffer block can enter the buffer hole to play a buffering role, avoiding direct rigid collision between the piston and the bottom of the cylinder, reducing the impact force during the movement, making the movement of the oil cylinder more stable, and helping to achieve more precise and stable control of the movement of the external structure.

[0023] Fourthly, this utility model boasts high durability. It employs seamless oil pipes for hydraulic oil transmission, which, compared to ordinary oil pipes, offer higher strength and better sealing, effectively preventing hydraulic oil leakage, reducing the frequency of malfunctions caused by pipe damage, and extending the cylinder's service life. The cylinder bottom features a transverse convex cross-section design, making it more stable when connected and fixed to external mechanisms, able to withstand greater external forces, and less prone to deformation or damage, thus enhancing the overall structural strength and durability of the cylinder. Furthermore, this utility model employs multiple dustproof sealing protections, incorporating multiple dustproof rings, such as a first, second, and third dustproof ring, effectively preventing external dust from entering the cylinder's inner circumference. Dust entering the cylinder accelerates the wear of seals and moving parts; however, this cylinder's multiple dustproof design significantly reduces dust damage to internal components, extending the service life of seals and other critical components, thereby improving the overall durability of the cylinder. Attached Figure Description

[0024] 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:

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 for Figure 1 Enlarged structural diagram of section A;

[0027] Figure 3 for Figure 1 Enlarged structural diagram of section B.

[0028] In the diagram: 1. Cylinder barrel; 2. Piston rod; 3. Piston; 4. Cylinder head; 5. Cylinder bottom; 6. First oil hole; 7. Second oil hole; 8. End tab; 9. Spherical plain bearing; 10. Connector; 11. Mounting part; 12. Oil pipe; 13. First piston seal ring; 14. Piston seal guide band; 15. Second piston seal ring; 16. Third piston seal ring; 17. First piston rod guide band; 18. First piston rod seal ring; 19. Second piston rod seal ring; 20. Second piston rod guide band; 21. First dustproof ring; 22. Second dustproof ring; 23. Cylinder head seal ring; 24. Third dustproof ring; 25. Buffer block. Detailed Implementation

[0029] 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.

[0030] like Figures 1-3 As shown, this utility model is a flexible carrier cylinder, including a cylinder barrel 1, a piston rod 2, a piston 3, an oil hole, and a connecting mechanism. The cylinder barrel 1 is arranged horizontally, with a cylinder bottom 5 at its left end and a cylinder cover 4 at its right end. The piston rod 2 passes through the inner circumference of the cylinder barrel 1 and the cylinder cover 4 and can move left and right relative to the cylinder barrel 1. The piston 3 is located at the left end of the piston rod 2, and the connecting mechanism is connected to the right end of the piston rod 2 for connecting with an external structure. Under the driving action of the piston rod 2, the external structure performs corresponding movements. The oil hole includes a first oil hole 6 that penetrates the cylinder bottom 5 and communicates with the inner circumference of the cylinder barrel 1, and a second oil hole 7 located at the left end of the cylinder cover 4 that penetrates the cylinder barrel 1 and communicates with its inner circumference. The first oil hole 6 and the second oil hole 7 cooperate to allow hydraulic oil to enter and exit the inner circumference of the cylinder barrel 1, so that the piston rod 2 can move left and right relative to the cylinder barrel 1.

[0031] like Figure 1 As shown, the connecting mechanism includes a pole lug 8 and a spherical bearing 9. The pole lug 8 is connected to the spherical bearing 9, and the spherical bearing 9 works together to make the cylinder 1 swing, so as to compensate for installation errors and relative displacement caused by load changes during operation.

[0032] like Figure 1 As shown, the connecting mechanism also includes a connector 10. The right end of the piston rod 2 is provided with a connecting hole that matches the shape of the connector 10. The connector 10 is embedded in the connecting hole so that the tab 8 is connected to the right end of the piston rod 2.

[0033] like Figures 1-2As shown, the cylinder barrel 1 has a mounting part 11 on the outer periphery of the middle part. The mounting part 11 is used to connect with an external mechanism to fix the cylinder barrel 1. The cross-section of the cylinder bottom 5 is a transverse convex shape. Its right end is shaped to match the cylinder barrel 1, and the upper and lower sides of the left end are both convex inward to cooperate with the mounting part 11 to connect with the external mechanism to fix the cylinder barrel 1.

[0034] like Figures 1-3 As shown, the first oil hole 6 and the second oil hole 7 are connected by an oil pipe 12. The oil pipe 12 is a seamless oil pipe 12, which is used to cooperate with the first oil hole 6 and the second oil hole 7 to allow hydraulic oil to enter and exit the inner circumference of the cylinder 1.

[0035] like Figures 1-3 As shown, a first piston sealing ring 13 and a piston sealing guide band 14 are arranged sequentially from left to right between the outer circumference of the piston 3 and the inner circumference of the cylinder 1. A second piston sealing ring 15 and a third piston sealing ring 16 are arranged sequentially from left to right between the middle inner circumference of the piston 3 and the piston rod 2. The first piston sealing ring 13, the second piston sealing ring 15, and the third piston sealing ring 16 cooperate to prevent hydraulic oil entering the inner circumference of the cylinder 1 through the first oil hole 6 from seeping to the right end of the piston 3. The piston sealing guide band 14 is used to guide the piston 3 when it moves left and right. A first piston rod guide band 17 and a first piston rod guide band 18 are arranged sequentially from left to right between the inner circumference of the cylinder head 4 and the piston rod 2. The cylinder head 4 is provided with a sealing ring 18, a second piston rod sealing ring 19, a second piston rod guide band 20, a first dustproof ring 21, and a second dustproof ring 22. From left to right, a cylinder head sealing ring 23 and a third dustproof ring 24 are provided between the outer circumference of the cylinder head 4 and the inner circumference of the cylinder barrel 1. The first dustproof ring 21, the second dustproof ring 22, and the third dustproof ring 24 are used to prevent external dust from entering the inner circumference of the cylinder barrel 1. The first piston rod guide band 17 and the second piston rod guide band 20 cooperate with each other to guide the piston rod 2 when it moves left and right. The first piston rod sealing ring 18 and the second piston rod sealing ring 19 prevent hydraulic oil entering the inner circumference of the cylinder barrel 1 from the second oil hole 7 from seeping outside the cylinder head 4.

[0036] like Figures 1-2 As shown, the right end of the cylinder bottom 5 is provided with a buffer hole that is recessed to the left, and the left end of the piston 3 is provided with a buffer block 25, the shape of which matches the buffer hole, for buffering the piston 3 when the piston rod 2 moves to the left.

[0037] Further, the cylinder 1 has a left-right length of 560.0mm to 570.0mm, an outer diameter of 110.0mm to 118.0mm, an inner diameter of 86.0mm to 94.0mm, a piston rod 2 has a diameter of 45.0mm to 55.0mm, a left-right length of 435.0mm to 445.0mm, a piston 3 has a left-right length of 55.0mm to 65.0mm, a cylinder head 4 has a left-right length of 75.0mm to 85.0mm, a connector 10 has a left-right length of 50.0mm to 60.0mm, an oil pipe 12 has a diameter of 15.0mm to 21.0mm, and a mounting part 11 has a left-right length of 15.0mm to 25.0mm. In this embodiment, the cylinder 1 has a left-right length of 565.0 mm, an outer diameter of 114.0 mm, an inner diameter of 90.0 mm, a piston rod 2 with a diameter of 50.0 mm, a left-right length of 440.0 mm, a piston 3 with a left-right length of 60.0 mm, a cylinder head 4 with a left-right length of 80.0 mm, a connector 10 with a left-right length of 55.0 mm, an oil pipe 12 with a diameter of 18.0 mm, and a mounting part 11 with a left-right length of 20.0 mm.

[0038] In the description of this application, it should be understood that the terms "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 of this application.

[0039] 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. A flexible carrier cylinder, characterized by: The application relates to a cylinder device, which comprises a cylinder barrel, a piston rod, a piston, an oil hole and a connecting mechanism, wherein the cylinder barrel is arranged horizontally, the left end of the cylinder barrel is provided with a cylinder bottom, the right end of the cylinder barrel is provided with a cylinder cover, the piston rod is arranged in the inner periphery of the cylinder barrel and the cylinder cover and can move leftward and rightward relative to the cylinder barrel, the piston is arranged at the left end of the piston rod, the right end of the piston rod is connected with the connecting mechanism, the connecting mechanism is used for connecting with an external structure and enabling the external structure to move correspondingly under the driving of the piston rod, the oil hole comprises a first oil hole penetrating through the cylinder bottom and being communicated with the inner periphery of the cylinder barrel and a second oil hole penetrating through the cylinder barrel and being communicated with the inner periphery of the cylinder barrel and located at the left end of the cylinder cover, the first oil hole and the second oil hole are matched with each other to enable hydraulic oil to enter and exit the inner periphery of the cylinder barrel, so that the piston rod moves leftward and rightward relative to the cylinder barrel.

2. The flexible carrier cylinder of claim 1, wherein: The connecting mechanism comprises a pole lug and a joint bearing, the pole lug is connected with the joint bearing, and the joint bearing is matched with the pole lug to enable the cylinder barrel to swing, so as to compensate for installation errors and relative displacement caused by load changes in the working process.

3. The flexible carrier cylinder of claim 2, wherein: The connecting mechanism further comprises a connecting head, the right end of the piston rod is provided with a connecting hole matched with the shape of the connecting head, and the connecting head is embedded in the connecting hole, so that the pole lug is connected with the right end of the piston rod.

4. The flexible carrier cylinder of claim 3, wherein: The middle part of the outer periphery of the cylinder barrel is provided with a mounting part, the mounting part is used for connecting with an external mechanism to fix the cylinder barrel, the cross section of the cylinder bottom is in a horizontal convex letter shape, the right end of the cylinder bottom is matched with the shape of the cylinder barrel, and the upper and lower sides of the left end are both inwardly convex, which are used for matching the mounting part and connecting with the external mechanism to fix the cylinder barrel.

5. The flexible carrier cylinder of claim 4, wherein: The first oil hole and the second oil hole are connected through an oil pipe, the oil pipe is a seamless oil pipe, and is used for matching the first oil hole and the second oil hole to enable hydraulic oil to enter and exit the inner periphery of the cylinder barrel.

6. The flexible carrier cylinder of claim 5, wherein: First, second and third piston sealing rings are arranged in sequence from left to right between the outer periphery of the piston and the inner periphery of the cylinder barrel, second and third piston sealing rings are arranged in sequence from left to right between the middle part of the inner periphery of the piston and the piston rod, the first, second and third piston sealing rings are matched with each other to prevent hydraulic oil from the first oil hole from penetrating to the right end of the piston, the piston sealing guide belt is used for guiding the leftward and rightward movement of the piston, first and second piston rod sealing rings are arranged in sequence from left to right between the inner periphery of the cylinder cover and the piston rod, first and second dustproof rings are arranged in sequence from left to right between the outer periphery of the cylinder cover and the inner periphery of the cylinder barrel, the first, second and third dustproof rings are used for preventing external dust from entering the inner periphery of the cylinder barrel, the first and second piston rod guide belts are matched with each other to guide the leftward and rightward movement of the piston rod, and the first and second piston rod sealing rings prevent hydraulic oil from the second oil hole from penetrating to the outside of the cylinder cover.

7. The flexible carrier cylinder of claim 6, wherein: The right end of the cylinder bottom is provided with a leftwardly recessed buffer hole, and the left end of the piston is provided with a buffer block matched with the shape of the buffer hole, which is used for buffering the piston when the piston rod moves leftward.

8. The flexible carrier cylinder of any one of claims 5 to 7, wherein: The left and right length of the cylinder is 560.0mm-570.0mm, the diameter of the outer periphery of the cylinder is 110.0mm-118.0mm, the diameter of the inner periphery of the cylinder is 86.0mm-94.0mm, the diameter of the piston rod is 45.0mm-55.0mm, the left and right length of the piston rod is 435.0mm-445.0mm, the left and right length of the piston is 55.0mm-65.0mm, the left and right length of the cylinder cover is 75.0mm-85.0mm, the left and right length of the connecting head is 50.0mm-60.0mm, the diameter of the oil pipe is 15.0mm-21.0mm, and the left and right length of the mounting portion is 15.0mm-25.0mm.

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