Bionical variable stiffness electro-hydraulic hybrid cylinder

Abstract

The utility model relates to the field of mixing jar, proposes a kind of bionic variable stiffness electro-hydraulic mixing jar, including base, the top of base is fixedly connected with mixing jar body, the top of base is fixedly connected with oil-liquid mixing module, the side surface of oil-liquid mixing module is equipped with hydraulic interface, the side surface of oil-liquid mixing module is also equipped with loop interface, the side surface of hydraulic interface is provided with sealing device;The utility model sealing device is fixed initially by the thread connection of connecting pipe and hydraulic interface, cooperate with the multiple adhesion sealing of adaptive sealing block, sealing groove, sealing block, and the outer periphery protection of sealing outer ring, form the multilayer sealing structure of inner sealing and outer protection, effectively reduce high-pressure oil leakage risk, improve its sealing reliability and working stability, and the arc section of adaptive sealing block is adapted to sealing groove, increase the contact area of both, make sealing surface adhesion more closely, and protection effect is better.

Description

Technical Field

[0001] This utility model relates to the field of mixing cylinders, specifically to a biomimetic variable stiffness electro-hydraulic mixing cylinder. Background Technology

[0002] A hybrid cylinder is an actuator that combines two or more different power sources or working principles.

[0003] In existing technologies, most use a single sealing ring or simple thread seal, relying on only one sealing barrier to resist high-pressure oil. Under high-pressure conditions, the oil can easily break through the barrier through the tiny gaps in the sealing surface, resulting in a high risk of leakage. This cannot meet the sealing requirements during dynamic pressure regulation. Furthermore, the seal and the inner wall of the interface are mostly in planar contact, with a small contact area, and are prone to misalignment due to assembly deviations and high-pressure impacts. Therefore, we propose a biomimetic variable stiffness electro-hydraulic mixing cylinder. Utility Model Content

[0004] This invention proposes a biomimetic variable stiffness electro-hydraulic mixing cylinder.

[0005] The technical solution of this utility model is as follows: A biomimetic variable stiffness electro-hydraulic mixing cylinder includes a base, a mixing cylinder body is fixedly connected to the top of the base, an oil mixing module is fixedly connected to the top of the base, a hydraulic interface is provided on the side of the oil mixing module, a circuit interface is also provided on the side of the oil mixing module, and a sealing device is provided on the side of the hydraulic interface. The sealing device includes a connecting pipe, the inner wall of which is threaded to the circumferential surface of the hydraulic interface. An adapter sealing block is fixedly connected to the inner wall of the hydraulic interface. A sealing groove is formed on the inner side wall of the hydraulic interface. A sealing block is fixedly connected to the inner wall of the connecting pipe. A sealing outer ring, an adapter sealing block, a sealing groove, and multiple sealing of the sealing block are fixedly connected to the outer circumferential surface of the connecting pipe, as well as the outer circumferential protection of the sealing outer ring, forming a double sealing structure of inner sealing and outer protection, which effectively reduces the risk of high-pressure oil leakage.

[0006] The cross-section of the adapter sealing block is arc-shaped and matches the sealing groove. The arc-shaped cross-section of the adapter sealing block matches the sealing groove, increasing the contact area between the two and making the sealing surfaces fit more tightly. This can effectively prevent high-pressure oil from leaking from the gap between the hydraulic interface and the connecting pipe. At the same time, the arc-shaped structure has a certain buffering effect, which can offset the damage to the sealing surface caused by oil impact and extend the service life of the adapter sealing block and the sealing groove.

[0007] A sealing ring is fixedly connected to the inner wall of the outer sealing ring, and an adapter groove is provided on the side of the connecting pipe. The sealing ring on the inner wall of the outer sealing ring further strengthens the seal between the connecting pipe and the subsequent outer circumferential anti-leakage device, preventing external dust and impurities from entering the sealing gap, and also helps to prevent oil leakage.

[0008] The side of the sealing block is located on the displacement trajectory of the sealing groove. When the connecting pipe is threaded and locked with the hydraulic interface, the sealing block can be precisely embedded into the inner side of the sealing groove and form a tight fit.

[0009] The hydraulic interface is provided with an outer circumferential anti-leakage device. The outer circumferential anti-leakage device includes a fixed pipe. The inner side wall of the fixed pipe is threaded to the circumferential surface of the hydraulic interface. A sealing groove is opened on the inner side wall of the fixed pipe. A sealing ring is fixedly connected to the inner side wall of the sealing groove. The outer circumferential anti-leakage device and the sealing device form a double sealing protection effect, which can prevent oil from leaking from the outer circumferential gap between the hydraulic interface and the connecting pipe. It makes up for the protection shortcomings of a single sealing structure. It is especially suitable for high-pressure, high-frequency vibration biomimetic variable stiffness working scenarios, and significantly improves the sealing stability and resistance to harsh working conditions of the electro-hydraulic mixing cylinder.

[0010] The sealing ring has a cylindrical cross-section, and the sealing groove has an arc-shaped structure. The cylindrical cross-section of the sealing ring and the arc-shaped structure of the sealing groove are adapted to each other, making the force on the sealing ring more uniform within the sealing groove, fully filling the sealing gap, and improving the fit of the sealing surface.

[0011] The sealing ring is positioned on the displacement trajectory of the adapter groove. This allows the outer circumferential leak-proof device and the sealing device to form a synergistic sealing structure, and the sealing ring can be precisely embedded into the adapter groove of the connecting pipe, resulting in better protection.

[0012] The side of the fixed tube is located on the displacement trajectory of the sealing outer ring. When the fixed tube thread is tightened, its side can fit tightly against the sealing outer ring, forming an outer circumferential compaction seal, which enhances the sealing pressure of the sealing outer ring.

[0013] The working principle and beneficial effects of this utility model are as follows: 1. The sealing device of this utility model achieves initial fixation through the threaded connection between the connecting pipe and the hydraulic interface. Combined with the matching sealing block, sealing groove, and multiple sealing of the sealing block, as well as the outer circumferential protection of the sealing outer ring, a multi-layer sealing structure of inner sealing and outer protection is formed, which effectively reduces the risk of high-pressure oil leakage, improves its sealing reliability and working stability, and the arc-shaped cross section of the matching sealing block is compatible with the sealing groove, increasing the contact area between the two, making the sealing surface fit more tightly and the protection effect better.

[0014] 2. This utility model forms a double sealing protection effect through the outer circumferential anti-leakage device and the sealing device, which can prevent oil from leaking from the outer circumferential gap between the hydraulic interface and the connecting pipe, making up for the protection shortcomings of the single sealing structure. It is especially suitable for high-pressure, high-frequency vibration biomimetic variable stiffness working scenarios, and significantly improves the sealing stability and resistance to harsh working conditions of the electro-hydraulic mixing cylinder.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Figure 1 This is a structural schematic diagram of the overall three-dimensional appearance of this utility model; Figure 2 This is a schematic diagram of the structure of the oil mixing module of this utility model; Figure 3 This is a schematic diagram of the sealing device of this utility model; Figure 4 This utility model Figure 3 A three-dimensional magnified structural diagram of A in the middle; Figure 5 This is a schematic diagram of the structure of the outer circumferential leak-proof device of this utility model; Figure 6 This utility model Figure 5 A three-dimensional magnified structural diagram of B.

[0017] In the diagram: 1. Base; 2. Mixing cylinder body; 3. Oil mixing module; 4. Hydraulic interface; 5. Circuit interface; 6. Sealing device; 7. Outer circumferential anti-leakage device; 601. Connecting pipe; 602. Adaptive sealing block; 603. Sealing groove; 604. Sealing block; 605. Sealing outer ring; 701. Fixing pipe; 702. Sealing ring; 703. Sealing groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] Example 1 like Figures 1-6As shown, this embodiment proposes a biomimetic variable stiffness electro-hydraulic mixing cylinder, including a base 1, a mixing cylinder body 2 fixedly connected to the top of the base 1, an oil mixing module 3 fixedly connected to the top of the base 1, a hydraulic interface 4 opened on the side of the oil mixing module 3, a circuit interface 5 opened on the side of the oil mixing module 3, and a sealing device 6 provided on the side of the hydraulic interface 4. The sealing device 6 includes a connecting pipe 601, the inner wall of which is threaded to the circumferential surface of the hydraulic interface 4. A matching sealing block 602 is fixedly connected to the inner wall of the hydraulic interface 4. A sealing groove 603 is provided on the inner side wall of the hydraulic interface 4. A sealing block 604 is fixedly connected to the inner wall of the connecting pipe 601. A sealing outer ring 605 is fixedly connected to the outer circumferential surface of the connecting pipe 601. The multiple fitting and sealing of the sealing block 602, the sealing groove 603, and the sealing block 604, as well as the outer circumferential protection of the sealing outer ring 605, form a double sealing structure of inner sealing and outer protection, which effectively reduces the risk of high-pressure oil leakage.

[0020] The cross-section of the adapter sealing block 602 is arc-shaped and matches the sealing groove 603. The arc-shaped cross-section of the adapter sealing block 602 matches the sealing groove 603, increasing the contact area between the two and making the sealing surfaces fit more tightly. This effectively prevents high-pressure oil from leaking through the gap between the hydraulic interface 4 and the connecting pipe 601. At the same time, the arc-shaped structure has a certain buffering effect, which can offset the damage to the sealing surface caused by oil impact and extend the service life of the adapter sealing block 602 and the sealing groove 603.

[0021] A sealing ring is fixedly connected to the inner wall of the sealing outer ring 605, and an adapter groove is provided on the side of the connecting pipe 601. The sealing ring on the inner wall of the sealing outer ring 605 further strengthens the seal between the connecting pipe 601 and the subsequent outer circumferential anti-leakage device 7, preventing external dust and impurities from entering the sealing gap, and also helps to prevent oil leakage.

[0022] The side of the sealing block 604 is located on the displacement trajectory of the sealing groove 603. When the connecting pipe 601 is threaded and locked with the hydraulic interface 4, the sealing block 604 can be precisely embedded into the inner side of the sealing groove 603 and form a tight fit.

[0023] In this embodiment, before the operation begins, the inner wall thread of the connecting pipe 601 is screwed and locked to the circumferential thread of the hydraulic interface 4, completing the initial positioning and installation of the sealing device 6. At this time, the sealing block 604 on the inner wall of the connecting pipe 601 is aligned with the displacement trajectory of the sealing groove 603 on the inner side wall of the hydraulic interface 4, the adapting sealing block 602 on the inner wall of the hydraulic interface 4 is initially in contact with the sealing groove 603, and the sealing outer ring 605 on the outer circumferential surface of the connecting pipe 601 is tightly attached to the outer circumferential surface of the hydraulic interface 4, laying the structural foundation for subsequent sealing. When the electro-hydraulic mixture... When the cylinder is engaged and oil supply is started, the high-pressure oil enters from the hydraulic interface 4. The oil pressure generates a radial thrust, which pushes the sealing block 604 to be fully embedded in the sealing groove 603, forming the first rigid fitting seal. At the same time, the oil pressure forces the arc-shaped cross section of the matching sealing block 602 to fully fit the inner wall of the sealing groove 603. Utilizing the automatic centering characteristics of the arc surface, the sealing gap is eliminated, forming the second flexible fitting seal. This stage achieves a self-tightening effect where the greater the oil pressure, the tighter the sealing surface fits, accurately resisting the impact of high-pressure oil.

[0024] Example 2 like Figures 1-6 As shown, based on the same concept as Embodiment 1 above, this embodiment also proposes that the circumferential surface of the hydraulic interface 4 be provided with an outer circumferential anti-leakage device 7. The outer circumferential anti-leakage device 7 includes a fixed pipe 701. The inner side wall of the fixed pipe 701 is threaded to the circumferential surface of the hydraulic interface 4. A sealing groove 703 is opened on the inner side wall of the fixed pipe 701. A sealing ring 702 is fixedly connected to the inner side wall of the sealing groove 703. The outer circumferential anti-leakage device 7 and the sealing device 6 form a double sealing protection effect, which can prevent oil from leaking from the outer circumferential gap between the hydraulic interface 4 and the connecting pipe 601, making up for the protection shortcomings of the single sealing structure. It is especially suitable for biomimetic variable stiffness working scenarios with high pressure and high frequency vibration, and significantly improves the sealing stability and resistance to harsh working conditions of the electro-hydraulic mixing cylinder.

[0025] The sealing ring 702 has a cylindrical cross-section, and the sealing groove 703 has an arc-shaped structure. The cylindrical cross-section of the sealing ring 702 and the arc-shaped structure of the sealing groove 703 are adapted to each other, so that the sealing ring 702 is subjected to more uniform force in the sealing groove 703, which can fully fill the sealing gap and improve the fit of the sealing surface.

[0026] The sealing ring 702 is located on the displacement trajectory of the adapter groove. The sealing ring 702 being located on the displacement trajectory of the adapter groove enables the outer circumferential anti-leakage device 7 and the sealing device 6 to form a cooperative sealing structure. The sealing ring 702 can be accurately embedded in the adapter groove of the connecting pipe 601, resulting in better protection.

[0027] The side of the fixed tube 701 is located on the displacement trajectory of the sealing outer ring 605. When the fixed tube 701 is threaded and tightened, its side can fit tightly against the sealing outer ring 605, forming an outer circumferential compaction seal, which enhances the sealing pressure of the sealing outer ring 605.

[0028] In this embodiment, before the operation begins, the fixing pipe 701 is screwed and locked to the circumferential surface of the hydraulic interface 4 through the inner wall thread, completing the initial fixing of the device. At this time, the sealing ring 702 in the sealing groove 703 on the inner wall of the fixing pipe 701 is precisely aligned along the displacement trajectory of the adapter groove on the side of the connecting pipe 601. At the same time, the side of the fixing pipe 701 is attached to the sealing outer ring 605 of the sealing device 6, forming a structural connection between the inner seal and the outer leak prevention. When the electro-hydraulic mixing cylinder starts to supply oil, if the high-pressure oil seeps outward from the gap of the sealing device 6, the oil pressure will act on the cylindrical sealing ring 702. Under the guidance of the arc-shaped sealing groove 703, the sealing ring 702 is evenly stressed and expands towards the sealing gap. The sealing ring 702 not only fits tightly against the inner wall of the sealing groove 703, but also firmly presses against the outer circumference of the connecting pipe 601, forming an elastic sealing barrier. This achieves a self-tightening effect where the greater the leakage pressure, the tighter the seal. The fixed pipe 701 continuously presses against the sealing outer ring 605 through threaded locking, which on the one hand enhances the sealing pressure on the outer circumference of the sealing device 6, and on the other hand restricts the axial displacement of the connecting pipe 601, preventing misalignment of the sealing surface under vibration conditions. At the same time, the sealing ring 702 is embedded in the matching groove of the connecting pipe 601, forming an inner double locking with the inner sealing structure of the sealing device 6. This stage not only prevents oil from leaking outward, but also further fixes the assembly position of the sealing device 6, improving the overall sealing system's resistance to vibration and impact.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A biomimetic variable stiffness electro-hydraulic mixing cylinder, characterized in that, Includes a base (1), a mixing cylinder body (2) is fixedly connected to the top of the base (1), an oil mixing module (3) is fixedly connected to the top of the base (1), a hydraulic interface (4) is provided on the side of the oil mixing module (3), a circuit interface (5) is also provided on the side of the oil mixing module (3), and a sealing device (6) is provided on the side of the hydraulic interface (4). The sealing device (6) includes a connecting pipe (601), the inner wall of which is threaded to the circumferential surface of the hydraulic interface (4), the inner wall of which is fixedly connected to a matching sealing block (602), the inner sidewall of which is provided with a sealing groove (603), the inner wall of which is fixedly connected to a sealing block (604), and the outer circumferential surface of which is fixedly connected to a sealing outer ring (605).

2. The biomimetic variable stiffness electro-hydraulic mixing cylinder according to claim 1, characterized in that, The cross-section of the adapter sealing block (602) is arc-shaped and is adapted to the sealing groove (603).

3. The biomimetic variable stiffness electro-hydraulic mixing cylinder according to claim 2, characterized in that, The inner wall of the sealing outer ring (605) is fixedly connected with a sealing ring, and the side of the connecting pipe (601) is provided with an adapter groove.

4. The biomimetic variable stiffness electro-hydraulic mixing cylinder according to claim 3, characterized in that, The side of the sealing block (604) is located on the displacement trajectory of the sealing groove (603).

5. A biomimetic variable stiffness electro-hydraulic mixing cylinder according to claim 4, characterized in that, The circumferential surface of the hydraulic interface (4) is provided with an outer circumferential anti-leakage device (7). The outer circumferential anti-leakage device (7) includes a fixed pipe (701). The inner side wall of the fixed pipe (701) is threaded to the circumferential surface of the hydraulic interface (4). A sealing groove (703) is opened on the inner side wall of the fixed pipe (701). A sealing ring (702) is fixedly connected to the inner side wall of the sealing groove (703).

6. A biomimetic variable stiffness electro-hydraulic mixing cylinder according to claim 5, characterized in that, The sealing ring (702) has a cylindrical cross-section, and the sealing groove (703) has an arc-shaped structure.

7. A biomimetic variable stiffness electro-hydraulic mixing cylinder according to claim 6, characterized in that, The sealing ring (702) is located on the displacement trajectory of the adapter groove.

8. A biomimetic variable stiffness electro-hydraulic mixing cylinder according to claim 7, characterized in that, The side of the fixed tube (701) is located on the displacement trajectory of the sealing outer ring (605).

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