Rotary damping holder based on electrorheological fluid

Abstract

The application discloses a rotary damping holder based on electrorheological fluid and belongs to the technical field of rotary damping holders. The rotary damping holder comprises a shell, a middle shaft, a negative pole wheel, an insulating ring, a positive pole cylinder, a negative pole wire and a positive pole terminal. The middle shaft is rotationally arranged in the shell, and the top of the middle shaft extends out of the shell. The negative pole wheel is fixed to the outer periphery of the middle shaft and located in the shell. The insulating ring is arranged in the shell. The positive pole cylinder is arranged on the inner side of the insulating ring, and a gap is formed between the positive pole cylinder and the negative pole wheel. The gap is provided with electrorheological fluid. The negative pole wire is indirectly connected with the middle shaft. The positive pole terminal is arranged on one side of the shell and connected with the positive pole cylinder. The application adopts the safety layout of the isolated electrode, in which the inner middle shaft is used as the rotor negative pole ground, and the outer positive pole cylinder is used as the stator positive pole voltage connection. The positive pole parts connected with high voltage are concentrated and isolated in the upper closed load end. The shell is isolated from the electrode, and the risk of electric leakage caused by high voltage is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of rotary damping gimbal technology, and more particularly to a rotary damping gimbal based on electrorheological fluid. Background Technology

[0002] Electrorheological fluids (ERFs) are smart materials whose rheological properties, such as shear strength and viscoelasticity, change drastically under the influence of an applied electric field. Their key characteristic is the ability to instantly transform from a free-flowing liquid to a near-solid or solid-like state under an applied electric field, exhibiting controllable yield strength and shear strength; moreover, this transformation is reversible. Rotational dampers are devices that reduce kinetic energy by providing resistance, enabling products to achieve smooth mechanical movement and improving product quality and lifespan.

[0003] Existing electrorheological fluid-based rotary damping gimbals cannot isolate the outer shell from the electrodes, posing a risk of leakage due to high voltage. For example, Chinese utility model patent application number 200820033252.4 discloses an electrorheological fluid rotary damper, which consists of an inner cylinder fixed on the same shaft and connected to the negative terminal of a DC power supply, and an outer cylinder connected to the positive terminal of a DC power supply. One end of the inner cylinder has an end cap to seal it. A space for filling electrorheological fluid is provided between the two end faces of the inner cylinder and the inner end faces of the end caps. A gap for the flow of electrorheological fluid is provided between the outer edge of the inner cylinder and the inner edge of the outer cylinder. The outer cylinder has end caps at both ends, and bearings that mate with the shaft are installed on the end caps. An insulating sleeve is provided between the bearings and the shaft. The outer cylinder has a filling hole and a sealing plug. In this rotary damper, the outer cylinder is connected to the positive terminal of the DC power supply, and the inner cylinder is connected to the negative terminal. The outer shell cannot be isolated from the electrodes, posing a risk of leakage due to high voltage. Summary of the Invention

[0004] The main objective of this invention is to provide a rotary damping gimbal based on electrorheological fluid, which aims to solve the problem that the existing rotary damping gimbals cannot isolate the shell from the electrodes, resulting in the risk of leakage due to high voltage.

[0005] To achieve the above objectives, the present invention provides a rotating damping gimbal based on electrorheological fluid, comprising: shell; A central shaft is rotatably mounted inside the housing, with its top extending out of the housing; The negative electrode wheel is fixed to the outer periphery of the central shaft and located inside the outer casing; An insulating ring is disposed inside the outer casing; A positive electrode cylinder is disposed inside the insulating ring, and there is a gap between the positive electrode cylinder and the negative electrode ring, in which electrorheological fluid is disposed; The negative electrode wire is indirectly connected to the central axis; A positive terminal is located on one side of the housing and is connected to the positive cylinder.

[0006] Optionally, the housing includes: The insulating ring is disposed within the shell body; The outer cover is fixed to the bottom of the shell body, making the shell body a closed body; A plurality of connecting screws are provided between the bottom cover and the outer cover, and the plurality of connecting screws connect the bottom cover and the outer cover to the shell body.

[0007] Optionally, a tripod connecting bolt is provided at the bottom of the bottom cover for connecting to a tripod; the portion of the top of the central axis extending out of the housing is connected to the photographic equipment.

[0008] Optionally, bearings are provided at the top and bottom of the housing, and the central shaft is disposed within the inner ring of the bearings.

[0009] Optionally, a key is provided between the negative electrode wheel and the central shaft, and the negative electrode wheel is fixedly connected to the central shaft by the key.

[0010] Optionally, retaining rings are provided between the top of the negative electrode wheel and the central shaft, and between the outer casing and the central shaft.

[0011] Optionally, a sealing ring is provided between the outer casing and the central shaft.

[0012] Optionally, a bearing clamping ring is provided on the outer side of the bearing at the bottom of the housing for clamping the bearing. A clamping screw is provided between the bearing clamping ring and the central shaft, and the clamping screw fixes the bearing clamping ring to the lower end of the central shaft.

[0013] Optionally, an insulating ring cover is provided at the bottom of the insulating ring, and the insulating ring cover is located between the bottom inner wall of the outer shell and the bottom of the insulating ring.

[0014] Optionally, an insulating ring sealing gasket is provided on the outer side of the insulating ring cover at the bottom of the housing.

[0015] The present invention proposes a rotary damping gimbal based on electrorheological fluid, which adopts an isolated electrode safety layout with the inner central shaft as the rotor negative pole grounded and the outer positive pole cylinder as the stator positive pole connected to voltage. The positive pole components connected to high voltage are concentrated and isolated at the upper closed load end, and the outer shell is isolated from the electrodes or reliably grounded, effectively preventing the risk of leakage caused by high voltage. Compared with traditional rotary damping devices, the safety protection level is greatly improved. Attached Figure Description

[0016] Figure 1A cross-sectional view of a rotating damping gimbal based on electrorheological fluid provided in an embodiment of the present invention; Figure 2 for Figure 1 A cross-sectional view from another perspective; Figure 3 A schematic diagram of a rotating damping gimbal based on electrorheological fluid provided in an embodiment of the present invention; Figure 4 for Figure 3 Another perspective view with the bottom cover removed; Figure 5 This is a schematic diagram illustrating the usage state of the present invention; In the diagram, 1. Central shaft; 2. Outer shell; 3. Outer shell cover; 4. Bottom cover; 5. Tripod connecting bolt; 6. Positive terminal; 7. Negative wire; 8. Bearing; 9. Sealing ring; 10. Snap ring; 11. Negative wheel rim; 12. Positive cylinder; 13. Insulating ring; 14. Insulating ring cover; 15. Insulating ring sealing gasket; 16. Bearing clamping ring; 17. Clamping screw; 18. Connecting screw; 19. Key. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] 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.

[0019] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0021] Please see Figures 1 to 5 This invention provides a rotary damping gimbal based on electrorheological fluid. The rotary damping gimbal may include: a shell 2, a central shaft 1, a negative electrode wheel 11, an insulating ring 13, a positive electrode cylinder 12, a negative electrode wire 7, and a positive electrode terminal 6. The central shaft 1 is rotatably disposed within the shell 2, with its top extending out of the shell 2. The negative electrode wheel 11 is fixed to the outer periphery of the central shaft 1 and located within the shell 2. The insulating ring 13 is disposed within the shell 2. The positive electrode cylinder 12 is disposed inside the insulating ring 13, and a gap exists between the positive electrode cylinder 12 and the negative electrode wheel 11, within which electrorheological fluid is disposed. The negative electrode wire 7 is indirectly connected to the central shaft 1. The positive electrode terminal 6 is disposed on one side of the shell 2 and is connected to the positive electrode cylinder 12.

[0022] In this embodiment, during use, an external power source is connected through the positive terminal 6 and the negative wire 7. Current flows from the positive terminal 6 to the positive cylinder 12, through the negative wheel 11 and the central shaft 1, and then out through the negative wire 7, forming an electric field in the gap between the positive cylinder 12 and the negative wheel 11. When it is necessary to adjust the shooting angle of the camera, the electric field strength is reduced, and the shear yield strength of the electrorheological fluid in the gap decreases accordingly, reducing viscosity. The central shaft can then drive the camera to rotate smoothly, completing the angle adjustment. After the adjustment is in place, the electric field strength is increased, and the shear yield strength of the electrorheological fluid rapidly increases, changing from a liquid state to a near-solid state. The resulting shear damping increases, locking the negative wheel 11 and the positive cylinder 12, keeping the central shaft 1 in its current rotational position, thus locking the rotation angle and maintaining the stability of the shooting angle of the camera. Because this device innovatively adopts an isolated electrode safety layout with the inner central shaft 1 as the rotor negative pole grounding and the outer positive pole cylinder 12 as the stator positive pole voltage connection, the positive pole components connected to high voltage are concentrated and isolated at the upper closed load end, and the outer shell 2 is isolated from the electrodes or reliably grounded, effectively preventing the risk of leakage caused by high voltage. Compared with traditional rotary damping devices, the safety protection level is greatly improved.

[0023] It should be noted that when the yield strength adjustment range is 0-60kPa (corresponding to an electric field strength of 3kV / mm) and the electric field strength is 0-3kV / mm, the corresponding damping torque range that can be generated is approximately 0-5.5Nm.

[0024] Please see Figures 1 to 3 In some possible implementations, the outer shell 2 may include: a shell body, an outer shell cover 3, and a bottom cover 4, wherein an insulating ring 13 is disposed in the shell body; the outer shell cover 3 is fixed to the bottom of the shell body, making the shell body a closed body; a plurality of connecting screws 18 are disposed between the bottom cover 4 and the outer shell cover 3, and the plurality of connecting screws 18 connect the bottom cover 4 and the outer shell cover 3 to the shell body.

[0025] Specifically, the outer cover 3 cooperates with the shell body to close the opening of the shell body from the bottom, and the bottom cover 4 further encapsulates the overall structure from the outside. The connecting screws 18 pass through the bottom cover 4 and the outer cover 3 in sequence and are locked with the shell body. The assembly and disassembly are convenient, which facilitates the subsequent maintenance and repair of the internal structure of the gimbal.

[0026] Please see Figure 5 In some embodiments, the bottom of the bottom cover 4 is provided with a tripod connecting bolt 5, which is used to connect with a tripod; the top of the central axis 1 extends out of the outer shell 2 and is connected to the photographic equipment.

[0027] The damping head can be fixedly mounted on a tripod using the tripod connecting bolt 5. The top of the central axis 1 is connected to the photography equipment, which allows for the adjustment and locking of the rotation angle of the photography equipment, thus meeting the usage requirements of conventional photography equipment.

[0028] Please see Figure 1 , Figure 2 In some possible implementations, bearings 8 are provided at the top and bottom of the housing 2, and the central shaft 1 is located inside the inner ring of the bearings 8.

[0029] Among them, the two bearings 8 support and limit the upper and lower ends of the central shaft 1 respectively, ensuring that the central shaft 1 can rotate smoothly around its own axis while preventing the central shaft 1 from radially offset, thus improving the rotational stability of the overall structure.

[0030] Please see Figure 2 In some embodiments, a key 19 is provided between the negative electrode wheel 11 and the central shaft 1, and the negative electrode wheel 11 is fixedly connected to the central shaft 1 through the key 19.

[0031] The above connection method can ensure that the negative electrode wheel 11 and the central shaft 1 are relatively fixed in the circumference, and the negative electrode wheel 11 can rotate synchronously with the central shaft 1, avoiding relative slippage that would affect the damping adjustment effect.

[0032] Please see Figure 1 , Figure 2In some possible implementations, a retaining ring 10 is provided between the top of the negative electrode wheel rim 11 and the central shaft 1, and between the outer casing 3 and the central shaft 1.

[0033] In this embodiment, the retaining ring 10 axially limits the negative electrode wheel 11 and the outer casing 3 respectively, restricting the negative electrode wheel 11 from moving axially along the central axis 1, while fixing the relative axial position of the outer casing 3 and the central axis 1, thereby improving the assembly stability of each component.

[0034] Please see Figure 1 , Figure 2 In some embodiments, a sealing ring 9 is provided between the outer shell 2 and the central shaft 1.

[0035] The sealing ring 9 can seal the gap to prevent leakage of the electrorheological fluid inside the housing 2, and also prevent external dust and liquid from entering the housing 2, which would affect the formation of the electric field and the normal operation of the electrorheological fluid.

[0036] Please see Figure 1 , Figure 2 In some possible implementations, a bearing clamping ring 16 is provided on the outer side of the bearing 8 at the bottom of the housing 2 to clamp the bearing 8. A clamping screw 17 is provided between the bearing clamping ring 16 and the central shaft 1 to fix the bearing clamping ring 16 to the lower end of the central shaft 1.

[0037] Specifically, the bearing clamping ring 16 is used to axially clamp and limit the bottom bearing 8 to prevent axial loosening and displacement of the bearing 8 during operation, and to ensure that the bearing 8 always maintains a stable support state.

[0038] Please see Figure 1 , Figure 2 In some embodiments, an insulating ring cover 14 is provided at the bottom of the insulating ring 13, and the insulating ring cover 14 is located between the bottom inner wall of the outer casing 2 and the bottom of the insulating ring 13.

[0039] Among them, the insulating ring cover 14, together with the insulating ring 13, further realizes the electrical isolation between the positive electrode cylinder 12 and the bottom structure of the outer shell 2, strengthens the insulation effect, and thus improves the safety during use.

[0040] Please see Figure 1 , Figure 2 In some possible implementations, an insulating ring sealing gasket 15 is provided on the outside of the bottom insulating ring cover 14 of the housing 2.

[0041] In this embodiment, the insulating ring sealing gasket 15 can fill the assembly gap between the insulating ring cover 14 and the inner wall of the outer shell 2, which on the one hand improves the sealing performance of the overall structure and avoids leakage of electrochemical fluid, and on the other hand further enhances the insulation and isolation effect to prevent leakage.

[0042] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A rotating damping gimbal based on electrorheological fluid, characterized in that, include: Outer shell (2); A central shaft (1) is rotatably disposed inside the outer casing (2), with the top of the central shaft (1) extending out of the outer casing (2). The negative electrode wheel (11) is fixed to the outer periphery of the central shaft (1) and located inside the outer shell (2); An insulating ring (13) is disposed inside the outer casing (2); A positive electrode cylinder (12) is disposed inside the insulating ring (13), and there is a gap between the positive electrode cylinder (12) and the negative electrode ring (11), in which electrorheological fluid is disposed; The negative electrode line (7) is indirectly connected to the central axis (1); A positive terminal (6) is disposed on one side of the outer casing (2), and the positive terminal (6) is connected to the positive cylinder (12).

2. The rotating damping gimbal based on electrorheological fluid according to claim 1, characterized in that, The outer casing (2) includes: The insulating ring (13) is disposed within the shell body; The outer cover (3) is fixed to the bottom of the shell body, making the shell body a closed body; A plurality of connecting screws (18) are provided between the bottom cover (4) and the outer cover (3), and the plurality of connecting screws (18) connect the bottom cover (4) and the outer cover (3) to the shell body.

3. The rotating damping gimbal based on electrorheological fluid according to claim 2, characterized in that, The bottom of the bottom cover (4) is provided with a tripod connecting bolt (5), which is used to connect with a tripod; the part of the top of the central axis (1) that extends out of the outer shell (2) is connected to the photography equipment.

4. The rotating damping gimbal based on electrorheological fluid according to claim 1, characterized in that, The top and bottom of the outer casing (2) are provided with bearings (8), and the central shaft (1) is located inside the inner ring of the bearing (8).

5. The rotating damping gimbal based on electrorheological fluid according to claim 1, characterized in that, A key (19) is provided between the negative electrode wheel (11) and the central shaft (1), and the negative electrode wheel (11) is fixedly connected to the central shaft (1) through the key (19).

6. The rotating damping gimbal based on electrorheological fluid according to claim 2, characterized in that, A retaining ring (10) is provided between the top of the negative electrode wheel (11) and the central shaft (1) and between the outer casing (3) and the central shaft (1).

7. The rotating damping gimbal based on electrorheological fluid according to claim 1, characterized in that, A sealing ring (9) is provided between the outer shell (2) and the central shaft (1).

8. The rotating damping gimbal based on electrorheological fluid according to claim 4, characterized in that, A bearing clamping ring (16) is provided on the outside of the bearing (8) at the bottom of the outer shell (2) for clamping the bearing (8). A clamping screw (17) is provided between the bearing clamping ring (16) and the central shaft (1), and the clamping screw (17) fixes the bearing clamping ring (16) to the lower end of the central shaft (1).

9. The rotating damping gimbal based on electrorheological fluid according to claim 1, characterized in that, An insulating ring cover (14) is provided at the bottom of the insulating ring (13), and the insulating ring cover (14) is located between the bottom inner wall of the outer shell (2) and the bottom of the insulating ring (13).

10. The rotating damping gimbal based on electrorheological fluid according to claim 9, characterized in that, An insulating ring sealing gasket (15) is provided on the outside of the insulating ring cover (14) at the bottom of the outer shell (2).

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