A novel multi-functional seahorse-inspired linear-torsional conversion vibration isolation and electromagnetic energy harvesting device

Abstract

The present invention belongs to the technical field of low-frequency bionic vibration isolation and energy harvesting, and aims to provide a novel multi-functional seahorse-like linear-torsional conversion vibration isolation and electromagnetic energy harvesting device to solve the technical pain points of traditional X-shaped bionic structures during the conversion from linear to torsional vibration, and provide technical support for the low-frequency vibration isolation and digital transformation and upgrading of high-end equipment. The technical solution is a novel multi-functional seahorse-like linear-torsional conversion vibration isolation and electromagnetic energy harvesting device, including a moving platform and a base; it is characterized in that: a seahorse-like mechanism for converting vertical vibration into reciprocating swing is provided between the moving platform and the base, and energy harvesting mechanisms for converting reciprocating swing into one-way rotation and outputting electric energy are symmetrically arranged on both sides of the seahorse-like mechanism.

Description

Technical Field

[0001] The present invention belongs to the technical field of low-frequency bionic vibration isolation and energy harvesting, and in particular relates to a novel multi-functional bionic seahorse linear-torsional conversion vibration isolation and electromagnetic energy harvesting device. Background Art

[0002] High-end equipment in national defense and military industries such as aerospace and naval vessels has become the cornerstone for measuring a country's scientific and technological level. At present, the structure is gradually developing towards large-scale, lightweight, and complex directions, making the vibration response gradually low-frequency, which severely restricts indicators such as the dynamic performance, reliability, and stability of high-end equipment. The traditional bionic X-shaped structure can obtain equivalent negative stiffness through a geometric nonlinear amplification mechanism, thereby obtaining the "high-static low-dynamic" stiffness characteristic and achieving low-frequency vibration isolation. These bionic structures can achieve X-Y two-dimensional or three-dimensional conversion, but cannot achieve the conversion from linear to torsional vibration.

[0003] The cross-section of the seahorse bone has a structure with a round inner and a square outer, and is connected to the bone in a cross shape all around (the circular spine is located in the center of the bone cross-section and extends out a cross-shaped skeleton to connect with the square outer bone). It can rotate under the action of an impact force, greatly buffering the vibration, providing an idea for the design of the linear-torsional vibration conversion of the bionic structure. In addition, by introducing an electromagnetic energy harvesting device and a mechanical rectification mechanism, the linear low-frequency vibration energy is converted into single-direction rotational electromagnetic power generation, providing energy for the low-power sensors of high-end equipment and facilitating the digital transformation and upgrading of high-end equipment. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above background art and provide a novel multi-functional bionic seahorse linear-torsional conversion vibration isolation and electromagnetic energy harvesting device to solve the technical pain points of the traditional X-shaped bionic structure in the conversion from linear to torsional vibration, and provide technical support for the low-frequency vibration isolation and digital transformation and upgrading of high-end equipment.

[0005] The technical solution of the present invention is as follows:

[0006] A novel multi-functional bionic seahorse linear-torsional conversion vibration isolation and electromagnetic energy harvesting device, including a moving platform and a base; characterized in that: a bionic seahorse mechanism for converting vertical vibration into reciprocating swing is provided between the moving platform and the base, and energy harvesting mechanisms for converting reciprocating swing into single-direction rotation and outputting electric energy are symmetrically provided on both sides of the bionic seahorse mechanism.

[0007] The seahorse - like mechanism includes a guide post vertically fixed on the base, an upper linear bearing slidably positioned on the guide post and fixed to the moving platform, a lower linear bearing slidably positioned on the guide post, a pair of drive discs rotatably positioned on both sides of the lower linear bearing around the same horizontal axis, an upper connecting rod with both ends rotatably hinged between the moving platform and the two drive discs respectively, a lower connecting rod with both ends rotatably hinged between the base and the two drive discs respectively, and a main buffer member arranged between the lower linear bearing and the base.

[0008] The upper connecting rod and the lower connecting rod are arranged in parallel; the main buffer member includes a main spring sleeved on the guide post and located between the lower linear bearing and the base.

[0009] The energy - harvesting mechanism includes a support structure slidably positioned vertically on the base, a rotating shaft rotatably positioned on the support structure, a speed increaser fixed on the support platform and connecting the drive disc and the rotating shaft, a first turntable rotatably positioned on the rotating shaft through a first one - way bearing, and a second turntable rotatably positioned on the rotating shaft through a second one - way bearing.

[0010] A number of magnets arranged in a circle are provided on the inner side of the first turntable, and a number of coils arranged in a circle are provided on the inner side of the second turntable. The coils are electrically connected to each other and lead out wires.

[0011] In the energy - harvesting mechanism on the same side, the rotation directions of the first one - way bearing and the second one - way bearing are opposite; the outer ring of the first one - way bearing is fixed to the first turntable and the inner ring is fixed to the rotating shaft, the outer ring of the second one - way bearing is fixed to the second turntable and the inner ring is fixed to the rotating shaft; the inner rings of the first one - way bearing and the second one - way bearing are both fixed to the rotating shaft through key - groove structures.

[0012] The support structure includes a first support post and a second support post vertically fixed on the base, a first linear bearing slidably positioned on the first support post, a second linear bearing slidably positioned on the second support post, and a secondary buffer member arranged between the second linear bearing and the base.

[0013] The speed increaser is fixed to the first linear bearing through a first connecting member; the input shaft of the speed increaser is coaxially connected to the drive disc, the output shaft of the speed increaser is coaxially connected to one end of the rotating shaft, and the other end of the rotating shaft is rotatably positioned on a second connecting member; the second connecting member is fixed to the second linear bearing.

[0014] The secondary buffer member includes a secondary spring sleeved on the second support post and located between the second linear bearing and the base; the speed increaser is a speed - increasing gearbox.

[0015] The drive disc, the first turntables and the second turntables of the two energy - harvesting mechanisms are coaxially arranged.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. In the seahorse-inspired mechanism, the moving platform and the base simulate the square exoskeleton of a seahorse, the driving disk simulates the spine of a seahorse, and the upper connecting rod and the lower connecting rod simulate the connection between the seahorse exoskeleton and the spine, realizing the conversion of linear-torsional vibration; when the moving platform approaches the base under vibration, the upper connecting rod and the lower connecting rod drive the driving disk to swing, converting linear vibration into swing vibration, and then converting the swing vibration into the high-speed rotation of the first turntable and the second turntable through the energy harvesting mechanism, consuming the energy generated by vibration and greatly improving the power generation efficiency under low-frequency vibration;

[0018] 2. The seahorse-inspired mechanism provides non-linear mass and non-linear damping when the driving disk swings, improving the vibration isolation performance of the overall structure;

[0019] 3. One-way bearings are arranged on the first turntable and the second turntable, converting bidirectional reciprocating swing into unidirectional rotation, greatly improving the power generation efficiency;

[0020] 4. The energy harvesting mechanisms are symmetrically arranged on both sides of the seahorse-inspired mechanism, and the overall structure has good stability;

[0021] 5. The structure of the present invention is simple, compact, safe and reliable, and suitable for popularization and use. Description of the Drawings

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0023] Figure 2 is a front view structural schematic diagram of the present invention.

[0024] Figure 3 is a three-dimensional structural schematic diagram of the seahorse-inspired mechanism of the present invention.

[0025] Figure 4 is a sectional structural schematic diagram of the seahorse-inspired mechanism of the present invention.

[0026] Figure 5 is an exploded structural schematic diagram of the seahorse-inspired mechanism of the present invention.

[0027] Figure 6 is a three-dimensional structural schematic diagram of the energy harvesting mechanism of the present invention.

[0028] Figure 7 is an exploded structural schematic diagram of the energy harvesting mechanism of the present invention.

[0029] Figure 8 is a three-dimensional structural schematic diagram of the rotating shaft of the present invention.

[0030] Reference Numerals in the Drawings:

[0031] 1. Moving platform; 2. Base; 3. Seahorse-like mechanism; 3-1. Driving disk; 3-2. Lower linear bearing; 3-3. Upper connecting rod; 3-4. Upper linear bearing; 3-5. Guide post; 3-6. Upper connecting seat; 3-7. Main spring; 3-8. Lower connecting rod; 3-9. Lower connecting seat; 4. Energy harvesting mechanism; 4-1. First connecting piece; 4-2. First support column; 4-3. Speed increaser; 4-4. Connecting plate; 4-5. First turntable; 4-6. First one-way bearing; 4-7. Magnet; 4-8. Flat key; 4-9. Rotating shaft; 4-10. Coil; 4-11. Second one-way bearing; 4-12. Second turntable; 4-13. Snap; 4-14. Copper sheet; 4-15. Second linear bearing; 4-16. Second connecting piece; 4-17. Second support column; 4-18. Auxiliary spring; 4-19. First linear bearing; 4-91. Keyway; 4-92. Snap ring; 4-93. Card slot. Detailed implementation manners

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] As Figure 1 shown, a new type of multifunctional seahorse-like linear-torsional conversion vibration isolation and electromagnetic energy harvesting device includes a moving platform 1, a base 2, a seahorse-like mechanism 3, and an energy harvesting mechanism 4.

[0034] The seahorse-like mechanism connects the moving platform and the base. The seahorse-like mechanism is used to convert the vertical vibration of the moving platform into the reciprocating swing of the driving disk. There are two energy harvesting mechanisms on the base, and these two energy harvesting mechanisms are symmetrically arranged on both sides of the seahorse-like mechanism ( Figure 2 on the left and right sides), and the energy harvesting mechanism is used to convert the reciprocating swing of the driving disk into the reverse rotation of the first turntable and the second turntable, and then convert the rotational energy into electrical energy to achieve energy harvesting.

[0035] The moving platform and the base are arranged vertically, and the seahorse-like mechanism is arranged between the moving platform and the base. The seahorse-like mechanism includes a guide post 3-5, a driving disk 3-1, an upper connecting rod 3-3, a lower connecting rod 3-8, an upper linear bearing 3-4, a lower linear bearing 3-2, and a main buffer member.

[0036] The guide post is vertically fixed on the base. The upper linear bearing and the lower linear bearing are arranged vertically and slidably positioned on the guide post. The upper linear bearing is fixed to the moving platform. Two driving disks are arranged in parallel and are respectively arranged on both sides of the guide post ( Figure 2 on the left and right sides), and the two driving disks are also rotatably positioned on both sides of the lower linear bearing, and the rotation axes of these two driving disks are coaxially arranged ( Figure 2The top end of the upper connecting rod is rotatably positioned on the bottom surface of the moving platform through the upper connecting seat 3-6. The bottom end of the upper connecting rod is rotatably positioned on the side surfaces of the two driving discs (the side facing the other driving disc). The top end of the lower connecting rod is rotatably positioned on the side surfaces of the two driving discs (the side facing the other driving disc). The bottom end of the lower connecting rod is rotatably positioned on the top surface of the base through the lower connecting seat 3-9. The upper connecting rod and the lower connecting rod are arranged in parallel. The main buffer is arranged between the lower linear bearing and the base. The main buffer is used to buffer the vibration of the moving platform. The main buffer is the main spring 3-7. The main spring is sleeved on the guiding column and is fixed to the lower linear bearing and the base at both ends respectively.

[0037] When the moving platform vibrates under external excitation, the moving platform moves linearly up and down relative to the base, and then drives the driving discs to swing reciprocally through the upper connecting rod and the lower connecting rod (the driving discs also vibrate slightly up and down simultaneously), realizing the linear-torsional conversion. The swinging amplitude of the driving discs depends on the vibration of the moving platform and is usually in the range of 10-15 degrees.

[0038] The energy harvesting mechanism includes a support structure, a rotating shaft 4-9, a speed increaser 4-3, a first turntable 4-5, a second turntable 4-12, a first one-way bearing 4-6, and a second one-way bearing 4-11.

[0039] The support structure is vertically movably positioned on the base ( Figure 2 in the vertical direction). The rotating shaft is rotatably positioned on the support structure around a horizontal axis ( Figure 2 in the horizontal direction). The speed increaser is coaxially connected to the rotating shaft and the driving disc on the same side. The first turntable is rotatably positioned on the rotating shaft through the first one-way bearing. The second turntable is rotatably positioned on the rotating shaft through the second one-way bearing.

[0040] The speed increaser is a speed increasing gearbox for amplifying the speed ratio. The speed increaser is an existing component.

[0041] A number of magnets 4-7 are arranged in a circular pattern on the inner side of the first turntable. A number of coils 4-10 are arranged in a circular pattern on the inner side of the second turntable. The coils are electrically connected to each other and lead out wires. The positions of the magnets correspond to the positions of the coils. All the coils on the second turntable can be connected in series and lead out wires to be connected to a copper sheet 4-14 for facilitating external power supply. The copper sheet is fixed on the rotating shaft.

[0042] The first one-way bearing is used to limit the rotation direction of the first turntable to make the first turntable rotate unidirectionally. The second one-way bearing is used to limit the rotation direction of the second turntable to make the second turntable rotate unidirectionally. The rotation directions of the first one-way bearing and the second one-way bearing are opposite. The first one-way bearing and the second one-way bearing are existing components.

[0043] Both the first one-way bearing and the second one-way bearing include an inner ring and an outer ring. The outer ring of the first one-way bearing is fixed to the first turntable through a connecting plate 4-4 and the inner ring is fixed to the rotating shaft. The outer ring of the second one-way bearing is fixed to the second turntable through a connecting plate 4-4 and the inner ring is fixed to the rotating shaft. The inner rings of the first one-way bearing and the second one-way bearing are both fixed to the rotating shaft through a keyway structure.

[0044] In the keyway structure, a keyway 4-91 is provided on the rotating shaft, a flat groove 4-8 is arranged in the keyway, the inner ring is sleeved on the rotating shaft and a groove (omitted in the figure) for mating with a flat key is provided on the inner ring. A snap ring 4-92 and a clamping groove 4-93 are also provided on the rotating shaft. A buckle 4-13 is installed in the clamping groove. The buckle and the snap ring are arranged on both sides of the inner ring to axially fix the inner ring.

[0045] In the support structure, a first support column 4-2 and a second support column 4-17 are vertically fixed on the base. A first linear bearing 4-19 is slidably positioned on the first support column, and a second linear bearing 4-15 is slidably positioned on the second support column. A secondary buffer is arranged between the second linear bearing and the base. The speed increaser is fixed to the first linear bearing through a first connecting piece 4-1. The input shaft of the speed increaser is coaxially connected to the driving disk, the output shaft of the speed increaser is coaxially connected to one end of the rotating shaft, and the other end of the rotating shaft is rotatably positioned on a second connecting piece 4-16. The second connecting piece is then fixed to the second linear bearing.

[0046] The secondary buffer is used to buffer the vibration of the support structure. The secondary buffer is a secondary spring 4-18. The secondary spring is sleeved on the second support column and its two ends are respectively fixed to the second linear bearing and the base.

[0047] The driving disk, the first turntable and the second turntable of the two energy harvesting mechanisms are all coaxially arranged. The driving disk drives the rotating shaft to perform reciprocating swings synchronously. Due to the limitation of the first one-way bearing and the second one-way bearing, when the rotating shaft drives the first turntable to swing in the same direction by a certain angle, the second turntable maintains its original motion state due to inertia. When the rotating shaft swings in the other direction, it drives the second turntable to swing in the same direction by a certain angle, and the first turntable maintains its original motion state (continues to rotate) due to inertia. Therefore, the first turntable and the second turntable keep rotating continuously. According to the electromagnetic induction law, an induced current is generated on the coil, realizing energy harvesting.

[0048] The working principle of the present invention is:

[0049] When external vibration occurs, it drives the moving platform to move up and down along the vertical direction. The moving platform applies a tangential force to the driving disk through the upper connecting rod and the lower connecting rod, driving the driving disk to swing reciprocally. The main buffer is used to buffer the up and down vibration of the driving disk to ensure the stability of the whole device. When the driving disk swings, it provides non-linear mass and non-linear damping to consume the energy generated by the vibration. The swinging speed of the driving disk is amplified by the speed increaser and transmitted to the rotating shaft. The two one-way bearings are installed reversely to convert the reciprocating swing of the driving disk into the one-way continuous rotation of the first turntable and the second turntable, realizing mechanical rectification. The coil cuts the magnetic induction lines during rotation to convert mechanical energy into electrical energy. The two reversely rotating turntables improve the power generation efficiency. The secondary buffer is used to buffer the up and down vibration of the rotating shaft and the two turntables to ensure the stability of the whole device.

[0050] The above components are all prior arts and can be obtained by outsourcing.

[0051] The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Claims

1. A novel multi-functional seahorse-like linear-torsional conversion vibration isolation and electromagnetic energy harvesting device, comprising a moving platform (1) and a base (2); characterized in that: A seahorse-like mechanism (3) for converting vertical vibration into reciprocating swing is provided between the moving platform and the base, and energy harvesting mechanisms (4) for converting reciprocating swing into unidirectional rotation and outputting electric energy are symmetrically arranged on both sides of the seahorse-like mechanism; The seahorse-like mechanism includes a guide post (3-5) vertically fixed on the base, an upper linear bearing (3-4) slidably positioned on the guide post and fixed to the moving platform, a lower linear bearing (3-2) slidably positioned on the guide post, a pair of drive disks (3-1) rotatably positioned on both sides of the lower linear bearing around the same horizontal axis, an upper connecting rod (3-3) with both ends rotatably hinged between the moving platform and the two drive disks respectively, a lower connecting rod (3-8) with both ends rotatably hinged between the base and the two drive disks respectively, and a main buffer member arranged between the lower linear bearing and the base; The upper connecting rod and the lower connecting rod are arranged in parallel; the main buffer member includes a main spring (3-7) sleeved on the guide post and located between the lower linear bearing and the base; The energy harvesting mechanism includes a support structure slidably positioned vertically on the base, a rotating shaft (4-9) rotatably positioned on the support structure, a speed increaser (4-3) fixed on the support platform and connecting the drive disk and the rotating shaft, a first turntable (4-5) rotatably positioned on the rotating shaft through a first one-way bearing (4-6), and a second turntable (4-12) rotatably positioned on the rotating shaft through a second one-way bearing (4-11); A plurality of magnets (4-7) arranged in a circle are provided on the inner side of the first turntable, and a plurality of coils (4-10) arranged in a circle are provided on the inner side of the second turntable. The coils are electrically connected to each other and lead out wires; The support structure includes a first support post (4-2) and a second support post (4-17) vertically fixed on the base, a first linear bearing (4-19) slidably positioned on the first support post, a second linear bearing (4-15) slidably positioned on the second support post, and a secondary buffer member arranged between the second linear bearing and the base; The speed increaser is fixed to the first linear bearing through a first connecting member (4-1); the input shaft of the speed increaser is coaxially connected to the drive disk, the output shaft of the speed increaser is coaxially connected to one end of the rotating shaft, and the other end of the rotating shaft is rotatably positioned on a second connecting member (4-16); the second connecting member is fixed to the second linear bearing.

2. A novel multi-functional seahorse-like linear-torsional conversion vibration isolation and electromagnetic energy harvesting device according to claim 1, characterized in that: In the energy harvesting mechanisms on the same side, the rotation directions of the first one-way bearing and the second one-way bearing are opposite; the outer ring of the first one-way bearing is fixed to the first turntable and the inner ring is fixed to the rotating shaft, the outer ring of the second one-way bearing is fixed to the second turntable and the inner ring is fixed to the rotating shaft; the inner rings of the first one-way bearing and the second one-way bearing are both fixed to the rotating shaft through keyway structures.

3. A novel multi-functional seahorse-like linear-torsional conversion vibration isolation and electromagnetic energy harvesting device according to claim 2, characterized in that: The secondary buffer member includes a secondary spring (4-18) sleeved on the second support post and located between the second linear bearing and the base; the speed increaser is a speed increasing gearbox.

4. A novel multi-functional seahorse-inspired linear-torsional conversion vibration isolation and electromagnetic energy harvesting device according to claim 3, characterized in that: The drive disk, the first turntables and the second turntables of the two energy harvesting mechanisms are coaxially arranged.

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