A giant magnetostrictive displacement amplification device

Abstract

The application discloses a kind of super magnetostrictive displacement amplification devices, comprising: main body, first end is equipped with installation cavity, second end is equipped with hydraulic cavity and sliding cavity;Two push plates are respectively arranged in two hydraulic cavities in the hydraulic cavity between two push plates filled with hydraulic medium;Piston is arranged in sliding cavity and is slidably connected with its inner wall;Piston rod is arranged in sliding cavity, one end of piston rod is connected with piston, and the other end of piston rod extends out the second end of sliding cavity;Conductive coil is arranged in installation cavity;Super magnetostrictive piece is arranged in conductive coil and its both ends pass through installation cavity;Two lever assemblies are respectively arranged on the two sides of main body;Lever assembly comprises: lever first end is connected to one end of super magnetostrictive piece;Push rod is arranged in the side wall of hydraulic cavity and is slidably connected with it;Support rod is arranged in the side end of main body and is hinged between the two ends of lever.The amplification device can amplify the displacement of super magnetostrictive material, and the response speed is fast, convenient, efficient, high precision.

Description

Technical Field

[0001] This invention belongs to the technical field of displacement amplification devices, and particularly relates to a supermagnetostrictive displacement amplification device. Background Technology

[0002] With the rapid development of modern technology, the automation of hospital nursing is also keeping pace with the times. Therefore, intelligent infusion monitoring systems have emerged, which not only reduce the workload of nurses but also lower the risk of cross-infection between doctors and patients. Simultaneously, nurses can monitor the patient's infusion status and control the infusion rate in real time through a cloud platform, ensuring the patient remains in optimal condition during infusion and reducing the risk of blood backflow when medication is finished.

[0003] To achieve real-time control of the infusion rate, a cloud-controlled actuator is necessary, which must be responsive and easy to control. Existing actuators designed with giant magnetostrictive materials meet these requirements. Giant magnetostrictive materials exhibit corresponding changes in expansion and contraction when subjected to a changing magnetic field, possessing advantages such as large expansion and contraction strain, rapid response, and ultra-low magnetostrictive anisotropy. Furthermore, the required structure for these expansion and contraction changes is simple and small in size. These characteristics fully meet the needs of cloud control. However, a drawback is the relatively small displacement resulting from the expansion and contraction of giant magnetostrictive materials, which is insufficient to propel the injection device. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a giant magnetostrictive displacement amplification device that can amplify the displacement of giant magnetostrictive materials, and features fast response, convenience, high efficiency, and high precision.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A giant magnetostrictive displacement amplification device, comprising:

[0007] The main body has an installation cavity at the first end and a hydraulic cavity and a sliding cavity at the second end. The first end of the sliding cavity is connected to the hydraulic cavity, and the second end is open.

[0008] Two push plates are respectively disposed on both sides of the hydraulic cavity, and the push plates are slidably and sealingly connected to the inner wall of the hydraulic cavity, and the hydraulic cavity is filled with hydraulic medium between the two push plates;

[0009] The piston is located inside the sliding cavity and is slidably and sealingly connected to its inner wall.

[0010] A piston rod is disposed within the sliding cavity, with one end of the piston rod connected to the piston and the other end extending out of the second end of the sliding cavity;

[0011] A conductive coil is disposed in the mounting cavity;

[0012] A super magnetostrictive component is inserted through the conductive coil and its two ends protrude from the mounting cavity;

[0013] Two lever assemblies are respectively located on both sides of the main body, and the first ends of the two lever assemblies are respectively connected to the two ends of the super magnetostrictive component, and the second ends are respectively connected to the two push plates;

[0014] The lever assembly includes:

[0015] The lever has its first end connected to one end of the super magnetostrictive component;

[0016] A push rod passes through the side wall of the hydraulic chamber and is slidably and sealingly connected thereto. One end of the push rod is hinged to the second end of the lever, and the other end is connected to the push plate.

[0017] A support rod is located at the side end of the main body and hinged between the two ends of the lever. The distance between the support rod and the first end of the lever is less than the distance between the support rod and the second end of the lever.

[0018] According to one embodiment of the present invention, the sliding cavity is disposed inside the hydraulic cavity and located between the two push plates.

[0019] According to an embodiment of the present invention, the main body includes a first housing and a second housing, the second housing is disposed at the upper end of the first housing, the mounting cavity is disposed in the first housing, and the hydraulic cavity and the sliding cavity are disposed in the second housing.

[0020] According to one embodiment of the present invention, the device includes a housing and a base, the base being disposed at the lower end of the housing, and the first box and the second box being disposed inside the housing and on the base.

[0021] According to one embodiment of the present invention, both the push rod and the support rod are hinged to the lever using spherical flexible hinges.

[0022] According to one embodiment of the present invention, the connection between the lever and the super magnetostrictive member is pre-tightened by a pre-tightening force.

[0023] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art:

[0024] In this embodiment of the invention, a lever assembly is provided, which can amplify the deformation of the super magnetostrictive component through the lever, and then push the push plate to move. The moving push plate compresses the hydraulic medium, and the hydraulic medium then pushes the piston and piston rod to move, thereby realizing the amplification of hydraulic displacement. In other words, the deformation of the super magnetostrictive component achieves two-stage displacement amplification through the lever and hydraulic pressure. The amplified displacement is output through the piston rod. The whole process has a fast response speed, is convenient and efficient, and has high precision. Attached Figure Description

[0025] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is a cross-sectional view of a magnetostrictive displacement amplification device according to the present invention;

[0027] Figure 2 This is a perspective view of a magnetostrictive displacement amplification device according to the present invention;

[0028] Figure 3 This is a schematic diagram of the lever displacement amplification principle of a super magnetostrictive displacement amplification device according to the present invention;

[0029] Figure 4 This is a schematic diagram of the hydraulic displacement amplification principle of a magnetostrictive displacement amplification device according to the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1: Piston rod; 2: Push rod; 3: Spherical flexible hinge; 4: Second upper sealing plate; 5: Push plate; 6: Base; 7: Piston; 8: Sliding cavity; 9: Second side sealing plate; 10: Second lower sealing plate; 11: Hydraulic cavity; 12: Lever; 13: Support rod; 14: Support rod; 15: First upper sealing plate; 16: First side sealing plate; 17: First lower sealing plate; 18: Conductive coil; 19: Magnetostrictive component; 20: Sealing ring; 21: Outer shell; 22: Base. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] See Figures 1 to 4 The core of this invention is to provide a super magnetostrictive displacement amplification device, including a main body, two push plates 5, a piston 7, a piston rod 1, a conductive coil 18, a super magnetostrictive component 19, and two lever 12 assemblies.

[0035] The main body has an installation cavity at the first end and a hydraulic cavity 11 and a sliding cavity 8 at the second end. The first end of the sliding cavity 8 is connected to the hydraulic cavity 11, and the second end is open.

[0036] The main body specifically includes a first housing and a second housing. The second housing is located at the upper end of the first housing, and the mounting cavity is located in the first housing. The hydraulic cavity 11 and the sliding cavity 8 are located in the second housing. It also includes an outer shell 21 and a base 22. The base 22 is located at the lower end of the outer shell 21. The first housing and the second housing are located inside the outer shell 21 and are mounted on the circular base 22.

[0037] The first housing includes four support rods 13. The upper ends of the four support rods 13 are connected to the first upper sealing plate 15, the lower ends are connected to the first lower sealing plate 17, and the periphery is connected to the first side sealing plate 16. The first lower sealing plate 17 is fixedly connected to the base 22. The second housing includes a second upper sealing plate 4, a second lower sealing plate 10, and surrounding second side sealing plates 9. The second lower sealing plate 10 is fixedly connected to the first upper sealing plate 15. The connections between the various plates of the second housing and the connection with the outer shell 21 are all sealed with sealing rings 20 to prevent liquid leakage.

[0038] Two push plates 5 are respectively disposed on both sides of the hydraulic cavity 11, and the push plates 5 are slidably and sealingly connected to the inner wall of the hydraulic cavity 11. The hydraulic cavity 11 is filled with hydraulic medium between the two push plates 5. In this embodiment, the sliding cavity 8 is disposed inside the hydraulic cavity 11 and located between the two push plates 5 to reduce the volume of the entire body. Furthermore, the surface area of ​​the push plates 5 is larger than the area at the connection point between the first end of the sliding cavity 8 and the hydraulic cavity 11.

[0039] The piston 7 is located within the sliding cavity 8 and is slidably and sealingly connected to its inner wall. The piston rod 1 is located within the sliding cavity 8, with one end connected to the piston 7 and the other end extending out of the second end of the sliding cavity 8. The second end of the piston rod 1 is used to connect to the device that needs to be driven. A sealing ring 20 is provided at the connection between the piston rod 1 and the outer casing 21 for sealing.

[0040] A conductive coil 18 is fixedly disposed within the mounting cavity, and a magnetostrictive element 19 passes through the conductive coil 18 with both ends extending out of the mounting cavity to the sides of the first housing. The magnetostrictive element 19 is made of a magnetostrictive material.

[0041] Two lever assemblies 12 are respectively located on both sides of the main body, and the first end of the two lever assemblies 12 is connected to both ends of the super magnetostrictive component 19, and the second end is connected to the two push plates 5 respectively.

[0042] Specifically, the lever 12 assembly includes a lever 12, a push rod 2, and a support rod 14. The first end of the lever 12 is connected to one end of the magnetostrictive member 19, and the connection is pre-tightened by a preload. Preferably, the first end of the lever 12 is hinged to one end of the magnetostrictive member 19.

[0043] The push rod 2 passes through the side wall of the hydraulic chamber 11 and is slidably sealed to it. One end of the push rod 2 is hinged to the second end of the lever 12, and the other end is connected to the push plate 5.

[0044] The support rod 14 is located at the side end of the main body and hinged between the two ends of the lever 12. The distance between the support rod 14 and the first end of the lever 12 is less than the distance between the support rod 14 and the second end of the lever 12. In this embodiment, both the push rod 2 and the support rod 14 are hinged to the lever 12 using spherical flexible hinges 3. The support rod 14 serves as the fulcrum of the lever 12.

[0045] The working process of this invention will be further explained below:

[0046] When in operation, the conductive coil 18 is energized, and a magnetic field is formed inside the conductive coil 18. The strength of the magnetic field changes with the change of current. When a magnetic field is formed inside the conductive coil 18, the supermagnetostrictive component 19 will elongate. As the strength of the magnetic field increases or decreases, the supermagnetostrictive component 19 will elongate or contract accordingly.

[0047] When the magnetostrictive component 19 extends, it pushes the first end of the lever 12 to rotate around the support rod 14, causing the second end of the lever 12 to rotate toward the main body to push the push rod 2. The push rod 2 pushes the push plate 5 to move within the hydraulic chamber 11.

[0048] See Figure 3 The principle of first-order displacement amplification for lever 12 is derived from the properties of similar triangles:

[0049]

[0050] This represents the displacement of the first end of lever 12; This represents the displacement of the second end of lever 12; The distance between the upper support rod 14 of lever 12 and the first end of lever 12; The distance between the support rod 14 on lever 12 and the push rod 2;

[0051] because Greater than , making Greater than Displacement of the second end of lever 12 This is amplified, and with and The larger the proportion, the greater the displacement of the second end of lever 12. The magnification is also greater.

[0052] When the push plate 5 undergoes a displacement change, it pushes the hydraulic medium, causing the volume of the hydraulic chamber 11 to decrease. The hydraulic medium then enters the sliding chamber 8, thereby pushing the piston 7 and piston rod 1 to move, thus achieving secondary displacement amplification. Its basic principle is as follows: Figure 4 As shown, the mathematical relationship between area and volume is as follows:

[0053]

[0054] The surface area of ​​push plate 5; The area at the connection point between the first end of the sliding cavity 8 and the hydraulic cavity 11; This represents the distance that push rod 2 moves; This represents the distance piston 7 moves.

[0055] because Greater than The distance piston 7 moves It is greater than This achieves two-stage displacement amplification.

[0056] This invention provides a controllable and fast-response displacement amplification device. When selecting a giant magnetostrictive material, the advantages of the material were considered, but its displacement limitations were also taken into account. Therefore, a two-stage amplification mechanism (lever-12 principle amplification and hydraulic amplification) was proposed to amplify the displacement, enabling the controllable infusion pump to drive the infusion device to its maximum stroke. This invention features a simple structure and small size; most importantly, its driving response is fast and reversible, achieving convenient, efficient, and high-precision results.

[0057] This invention not only solves the problem of insufficient displacement but also achieves a controllable effect. Furthermore, it promotes automation in hospital nursing care. Therefore, this invention is of great significance to the research of controllable infusion devices.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A giant magnetostrictive displacement amplification device, characterized in that, The utility model relates to a kind of two-stage displacement amplification mechanism, including: Main body, first end is equipped with installation cavity, second end is equipped with hydraulic chamber and sliding cavity, the first end of the sliding cavity is communicated with the hydraulic chamber, and the second end is open; Two push plates, respectively in the two sides of the hydraulic chamber, and the push plate is slidably sealedly connected to the inner wall of the hydraulic chamber, and the hydraulic chamber is filled with hydraulic medium between two push plates; Piston, is equipped in the sliding cavity and is slidably sealedly connected with its inner wall; Piston rod, equipped in the sliding cavity, one end of the piston rod is connected with the piston, and the other end extends out of the second end of the sliding cavity; Conductive coil, equipped in the installation cavity; Super magnetostrictive piece, is threaded in the conductive coil and its two ends are threaded out of the installation cavity; Two lever assemblies, respectively on the two sides of the main body, and the first end of two lever assemblies is respectively connected with the two ends of the super magnetostrictive piece, and the second end is respectively connected with two push plates; The lever assembly includes: Lever, first end is connected to one end of the super magnetostrictive piece; Push rod, threaded in the side wall of the hydraulic chamber and slidably sealedly connected with it, one end of the push rod is hinged with the second end of the lever, and the other end is connected to the push plate; Support rod, is equipped in the side end of the main body and is hinged between the two ends of the lever, and the distance between the support rod and the first end of the lever is less than the distance between the support rod and the second end of the lever; The sliding cavity is located in the hydraulic chamber and between two push plates; The main body includes a first box and a second box, the second box is arranged on the upper end of the first box, the installation cavity is arranged in the first box, and the hydraulic chamber and the sliding cavity are arranged in the second box; Including shell and base, the base is arranged on the lower end of the shell, and the first box and the second box are arranged in the shell and on the base; The surface area of the push plate is s1, the area of the opening between the first end of the sliding cavity and the hydraulic chamber is s2, the moving distance of the push rod is d3, and the moving distance of the piston is d4; 2s1 d3=s2 d4; 2s1 is greater than s2, and the moving distance d4 of the piston is greater than d3, to realize two-stage displacement amplification.

2. The magnetostrictive displacement amplification device of claim 1, wherein, The push rod and the support rod are hinged with the lever by spherical flexible hinge.

3. The magnetostrictive displacement amplification device of claim 1, wherein, The connection between the lever and the super magnetostrictive piece is pre-tightened by pre-tightening force.

Images