Foldable pendulum type vibration energy collecting device

Abstract

The invention relates to the technical field of vibration energy collection, in particular to a foldable swing type vibration energy collection device which comprises an inertia swing arm and a power generation mechanism, and the inertia swing arm comprises a mass block, a multi-stage telescopic rod assembly and an inertia arm rotating flange plate; the power generation mechanism comprises a telescopic pendulum fixing frame, a rotating shaft, a coupler and a power generator. The inertia arm rotating flange plate is rotationally connected with the telescopic pendulum fixing frame through a rotating shaft, a cavity groove with an opening is formed in the mass block in a hollowed-out mode, the top of the multi-stage telescopic rod assembly is fixedly connected with the inertia arm rotating flange plate, and the tail end of the multi-stage telescopic rod assembly is fixed to the bottom of the cavity groove. The size of the multi-stage telescopic rod assembly is matched with that of the cavity groove in the contraction state of the multi-stage telescopic rod assembly; the generators are installed at the two ends of the rotating shaft through couplings. The energy collecting device can be folded under the condition of external interference, so that the pendulum length is reduced, and the maximum storable mechanical energy of the energy collecting device is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of vibration energy collection, and in particular to a foldable pendulum-type vibration energy collection device. Background Art

[0002] At the current level of science and technology, various marine unmanned systems, including underwater unmanned vehicles, unmanned ships, and ocean buoys, play an important role in ocean mapping, hydrological observation, resource exploration, underwater operations, transportation, anti-submarine and search and rescue. The endurance of such marine unmanned systems is an important indicator. The more convenient solution today is to directly use rechargeable batteries. This solution requires the marine unmanned system to be periodically recovered, charged and redeployed, so it requires a high investment in human resources and economic costs in terms of operation.

[0003] In recent years, wave energy harvesting technology with vibration energy harvesting technology as the core is becoming more and more mature and is being used in marine unmanned systems. This is because vibration energy harvesting technology can enable marine unmanned systems to directly obtain sufficient energy in the ocean and use it to power the electronic components and power systems on board. As for vibration energy harvesting technology, how to solve the problem of protecting the vibration energy harvesting device when the sea conditions are high is an issue that technicians in this field need to solve urgently. Summary of the invention

[0004] In order to solve the above technical problems existing in the prior art, the present invention proposes a foldable pendulum-type vibration energy collection device, and its specific technical solution is as follows: A foldable pendulum-type vibration energy collection device comprises an inertial swing arm and a power generation mechanism, wherein the inertial swing arm comprises: a mass block, a multi-stage telescopic rod assembly and an inertial arm rotating flange; The power generation mechanism comprises: a telescopic pendulum fixed frame, a rotating shaft, a coupling and a generator; the inertia arm rotating flange is rotatably connected to the telescopic pendulum fixed frame through the rotating shaft, the interior of the mass block is hollowed out to provide an open cavity, the top of the multi-stage telescopic rod assembly is fixedly connected to the inertia arm rotating flange, the end is fixed to the bottom of the cavity, and the multi-stage telescopic rod assembly is matched with the size of the cavity in its contracted state; the generator is installed at both ends of the rotating shaft through the coupling.

[0005] Furthermore, the cavity is divided into: a bottom groove and an upper cavity; the multi-stage telescopic rod assembly includes: a plurality of telescopic rods that are sleeved step by step from the inside to the outside, wherein the end of the innermost telescopic rod is embedded in the bottom groove and is fastened to the mass block by screws and nuts, and the outer diameter of the outermost telescopic rod matches the cavity size and its top end is fastened to the inertia arm rotating flange by screws and nuts.

[0006] Furthermore, a retaining ring protruding radially inward is provided at the end of each telescopic rod, and a cylindrical edge protruding radially outward is provided at the top of each telescopic rod, and two adjacent telescopic rods are limitedly slidably connected via the retaining ring and the cylindrical edge.

[0007] Furthermore, a plurality of through holes are formed on the side wall of each telescopic rod.

[0008] Furthermore, the multi-stage telescopic rod assembly also includes: an elastic rope, which is arranged and connected between the innermost telescopic rod and the rotating flange of the inertia arm.

[0009] Furthermore, the telescopic pendulum fixing frame is provided with two bearing supports spaced apart from each other, both bearing supports are provided with mounting holes and mounting holes, and the rotating shaft is rotatably connected to the two mounting holes through a bearing limit assembly.

[0010] Furthermore, a connecting seat with an axial hole is provided on the rotating flange of the inertia arm, and the connecting seat is located between two bearing supports with a spacing therebetween. The rotating shaft is connected to the mounting hole and is connected to the connecting seat through the axial hole.

[0011] Furthermore, the rotating shaft has a stepped shaft portion; the bearing limiting assembly includes: a sleeve, a bearing and an end cover, the bearing and the sleeve are cooperated to be installed in the mounting hole and connected to the rotating shaft; the end cover is installed at the outer interface of the two bearing support mounting holes, and the bearing is axially limited by cooperating with the sleeve and the stepped shaft portion.

[0012] Furthermore, generator fixing frames are installed at both ends of the telescopic pendulum fixing frame, one end of the coupling is connected to the rotating shaft, and the other end is installed and connected to the generator fixing frame, the generator is fixedly installed on the generator fixing frame and the generator input shaft is connected to the other end of the coupling.

[0013] Furthermore, the rotating shaft is provided with a flat key.

[0014] The energy collection device of the present invention can swing under the excitation of waves or multiple degrees of freedom of a carrier, thereby driving the motor to output induced electromotive force outward; and can complete folding under the condition of external interference, thereby reducing the pendulum length to reduce its own maximum storable mechanical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the foldable pendulum-type vibration energy collection device of the present invention; Figure 2 It is a schematic diagram of the overall assembly structure of the foldable pendulum-type vibration energy collection device of the present invention; Figure 3It is a front view structural schematic diagram of the foldable pendulum type vibration energy collection device of the present invention when the foldable inertial arm is in an unfolded state; Figure 4 It is a schematic diagram of the side cross-sectional structure of the foldable pendulum-type vibration energy collection device of the present invention when the foldable inertial arm is in an unfolded state; Figure 5 It is a front view structural schematic diagram of the foldable pendulum type vibration energy collection device of the present invention when the foldable inertial arm is in a folded state; Figure 6 It is a schematic diagram of the cross-sectional structure of the foldable pendulum-type vibration energy collection device of the present invention when the foldable inertial arm is in a folded state; The accompanying drawings are marked as follows: 1. mass block; 2. first-stage telescopic rod; 3. second-stage telescopic rod; 4. third-stage telescopic rod; 5. fourth-stage telescopic rod; 6. inertia arm rotating flange; 7. rotating shaft; 8. flat key; 9. bushing; 10. end cover; 11. coupling; 12. telescopic pendulum fixing frame; 13. generator fixing frame; 14. generator; 15. generator input shaft; 16. bearing; 17. elastic rope. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and technical effect of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1 and Figure 2 As shown, a foldable pendulum-type vibration energy collection device according to an embodiment of the present invention includes: a retractable and foldable inertial swing arm and a power generation mechanism.

[0018] Specifically, the telescopic and foldable inertial swing arm includes: a mass block 1, a primary telescopic rod 2, a secondary telescopic rod 3, a tertiary telescopic rod 4, a quaternary telescopic rod 5, an inertial arm rotating flange 6 and an elastic rope 17.

[0019] Among them, the mass block 1 is fastened to the primary telescopic rod 2 by four screws and nuts, the primary telescopic rod 2 is inserted from the top opening of the secondary telescopic rod 3, the secondary telescopic rod 3 is inserted from the top opening of the tertiary telescopic rod 4, and the tertiary telescopic rod 4 is inserted from the top opening of the fourth telescopic rod 5, thereby forming the basic structure of the inertial arm and realizing its telescopic and foldable function.

[0020] The end of each telescopic rod is provided with a radially inwardly protruding retaining ring, and each telescopic rod is provided with a radially outwardly protruding cylindrical edge at the top, so that the next telescopic rod can be limited in one direction, and a stable sliding track is formed between each telescopic rod and the telescopic rod of the previous level. The elastic rope 17 is connected between the first telescopic rod 2 and the inertia arm rotating flange 6, and then the top of the fourth telescopic rod 5 is fastened to the inertia arm rotating flange 6 with screws and nuts, and the assembly of the foldable inertia arm part can be completed.

[0021] The power generation mechanism includes: a rotating shaft 7, a flat key 8, a shaft sleeve 9, an end cover 10, a coupling 11, a telescopic pendulum fixing frame 12, a generator fixing frame 13, a generator 14, a generator input shaft 15, and a bearing 16.

[0022] Two bearing supports with a distance between them are provided in the middle of the telescopic pendulum fixing frame 12. The centers of the two bearing supports are aligned with the centers of the bearing 16, the bushing 9 and the connecting seat of the inertia arm rotating flange 6. The rotating shaft 7 with the flat key 8 is passed through the bearing 16 installed on the bearing support on one side of the telescopic pendulum fixing frame 12, the connecting seat of the inertia arm rotating flange 6, the bushing 9 and the bearing 16 installed on the bearing support on the other side of the telescopic pendulum fixing frame 12 in sequence. Then the end cover 10 is fastened to the outer end interfaces of the bearing supports on both sides with screws and bolts, so that the bearing 16 is axially limited under the combination of the end cover 10 and the bushing 9 and the combination of the stepped shaft part of the rotating shaft 7 and the end cover 10. Then, the coupling 11 is installed at both ends of the rotating shaft 7, and then the generator fixing frame 13 is installed at both ends of the telescopic pendulum fixing frame 12, and the coupling 11 at both ends of the rotating shaft 7 is connected to the generator fixing frame 13 with screws. Finally, the generator 14 is fixedly installed on the generator fixing frame 13 and connected to one end of the coupling 11, thereby completing the assembly of the overall mechanism.

[0023] The foldable pendulum vibration energy harvesting device of this embodiment can perform periodic oscillating motion around the rotating shaft 7 under the action of external excitation, specifically, any power signal containing a periodic vibration mode. When the intensity of the external vibration excitation is large enough, the device can perform periodic rotational motion around the rotating shaft 7, which is collectively referred to as periodic motion below. The external excitation first acts on the telescopic pendulum fixed frame 12. Since the telescopic pendulum fixed frame 12 and the rotating shaft 7 are connected by a bearing 16, the two have low damping in the rotation direction, thereby generating periodic motion; on the other hand, under the action of the gravity of the mass block 1, the part driven by the rotating shaft 7 will make a recovery motion toward the balance point, thereby promoting periodic motion.

[0024] When the device performs periodic motion, since the generators 14 on both sides are fixed on the telescopic pendulum fixing frame 12, there is a relative angular velocity difference between them and the rotating shaft 7 and the generator input shaft 15, so the stator and the rotor inside the generator 14 also have a relative angular velocity difference, thereby generating an induced electromotive force, and the armature circuit of the generator 14 outputs a power signal to the external circuit. Among them, the specific principle of power generation is related to the type of motor. Taking the use of a brushed DC motor as a generator as an example, the generator input shaft 15 will transmit power to the rotor through the built-in reducer of the generator. The rotor cuts the magnetic flux lines of the magnetic poles on the stator during rotation, generating an induced electromotive force in the armature circuit.

[0025] In addition, the foldable pendulum vibration energy harvesting device of this embodiment can also be folded or unfolded under external load. The principle of the folding process is as follows: the increasing external load applied to the mass block 1 drives the first-stage telescopic rod 2, the second-stage telescopic rod 3 and the third-stage telescopic rod 4 to move axially inward in turn, and each stage of the telescopic rod moves along the track of the previous stage of the telescopic rod, and finally achieves the following Figure 5 and Figure 6 The compression state is shown.

[0026] The principle of the unfolding process is: the decreasing external load applied to the mass block 1 drives the third-stage telescopic rod 4, the second-stage telescopic rod 3 and the first-stage telescopic rod 2 to move axially outward in turn, and each stage of the telescopic rod moves along the track of the previous stage of the telescopic rod, and finally achieves the following Figure 3 and Figure 4 The compression state is shown.

[0027] In summary, in the device of the present invention, since an elastic rope 17 is connected between the primary telescopic rod 2 and the inertial arm rotating flange 6, if the deceleration of the external load is too fast, the increasing elastic force of the elastic rope 17 can be used to slow down the impact of the primary telescopic rod 2 driven by the mass block 1 on the secondary telescopic rod 3 when the primary telescopic rod 2 moves axially outward.

[0028] Furthermore, since a plurality of through holes are opened on the side walls of the secondary telescopic rod 3, the tertiary telescopic rod 4, and the quaternary telescopic rod 5, specifically, each telescopic rod of the present embodiment has two through holes, when each telescopic rod moves axially outward or axially inward, the inside of the telescopic rod is connected to the outside atmosphere, and no closed air cavity is formed. Therefore, when the device is folded or unfolded, there is no additional resistance caused by the compressed gas.

[0029] In addition, since the present invention adopts a multi-stage telescopic rod that is connected step by step, and the mass block 1 is hollowed out inside, leaving space for placing each section of the telescopic rod, Figure 4 and Figure 6After folding, only the necessary free space is retained. The so-called "necessary free space" refers to the space reserved for processing errors and assembly errors, which greatly improves the space utilization rate and thus can achieve a larger compression ratio. Specifically, in this design, the compression ratio can reach about 4:1.

[0030] The above is only a preferred implementation case of the present invention and does not limit the present invention in any form. Although the implementation process of the present invention is described in detail above, for those familiar with the art, they can still modify the technical solutions recorded in the above examples, or replace some of the technical features therein with equivalents. All modifications, equivalent replacements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A foldable pendulum-type vibration energy collection device, comprising an inertial swing arm and a power generation mechanism, characterized in that: The inertial swing arm comprises: a mass block (1), a multi-stage telescopic rod assembly and an inertial arm rotating flange (6); the power generation mechanism comprises: a telescopic swing fixed frame (12), a rotating shaft (7), a coupling (11) and a generator (14); the inertial arm rotating flange (6) is rotatably connected to the telescopic swing fixed frame (12) via the rotating shaft (7); the mass block (1) is hollowed out to provide an open cavity; the top of the multi-stage telescopic rod assembly is fixedly connected to the inertial arm rotating flange (6) and the end is fixed to the bottom of the cavity; and the multi-stage telescopic rod assembly is arranged to match the size of the cavity in its retracted state; and the generator (14) is mounted on both ends of the rotating shaft (7) via the coupling (11).

2. The foldable pendulum vibration energy harvesting device according to claim 1, characterized in that: The cavity is divided into: a bottom groove and an upper cavity; The multi-stage telescopic rod assembly comprises: a plurality of telescopic rods which are sleeved step by step from the inside to the outside, wherein the end of the innermost telescopic rod is embedded in the bottom groove and is fastened to the mass block (1) by means of screws and nuts, and the outer diameter of the outermost telescopic rod matches the size of the cavity and the top end of the telescopic rod is fastened to the inertia arm rotating flange (6) by means of screws and nuts.

3. The foldable pendulum vibration energy collection device according to claim 2, characterized in that: The end of each telescopic rod is provided with a retaining ring protruding radially inwards, and the top of each telescopic rod is provided with a cylindrical edge protruding radially outwards. Two adjacent telescopic rods are limitedly slidably connected through the retaining ring and the cylindrical edge.

4. The foldable pendulum vibration energy harvesting device according to claim 2, characterized in that: A plurality of through holes are provided on the side wall of each telescopic rod.

5. The foldable pendulum vibration energy collection device according to claim 2, characterized in that: The multi-stage telescopic rod assembly further comprises an elastic rope (17), wherein the elastic rope (17) is arranged and connected between the innermost telescopic rod and the inertia arm rotating flange (6).

6. The foldable pendulum vibration energy harvesting device according to claim 2, characterized in that: The telescopic pendulum fixing frame (12) is provided with two bearing supports spaced apart from each other, both bearing supports are provided with mounting holes, and the rotating shaft (7) is rotatably connected to the two mounting holes via a bearing limit assembly.

7. The foldable pendulum vibration energy harvesting device according to claim 6, characterized in that: The inertia arm rotating flange (6) is provided with a connecting seat having an axial hole, the connecting seat being located between two bearing supports spaced apart from each other, and the rotating shaft (7) is connected to the mounting hole and penetrates the connecting seat through the axial hole.

8. The foldable pendulum vibration energy harvesting device according to claim 6, characterized in that: The rotating shaft (7) has a stepped shaft portion; the bearing limiting assembly comprises: a shaft sleeve (9), a bearing (16) and an end cover (10); the bearing (16) is arranged in cooperation with the shaft sleeve (9) to be installed in the mounting hole and connected to the rotating shaft (7); the end cover (10) is installed at the outer interface of the two bearing support mounting holes, and axially limits the bearing (16) by cooperating with the shaft sleeve (9) and the stepped shaft portion.

9. The foldable pendulum vibration energy harvesting device according to claim 1, characterized in that: Generator fixing frames (13) are mounted on both ends of the telescopic pendulum fixing frame (12); one end of the coupling (11) is connected to the rotating shaft (7) and the other end is mounted on the generator fixing frame (13); the generator (14) is fixedly mounted on the generator fixing frame (13) and the generator input shaft (15) is connected to the other end of the coupling (11).

10. The foldable pendulum vibration energy harvesting device according to claim 1, characterized in that: The rotating shaft (7) is provided with a flat key (8).

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