Vibration power generation device

Abstract

The utility model belongs to the technical field of vibration power generation of a vibration source, and discloses a vibration power generation device. The vibration power generation device comprises a power generation body, a cavity is formed in the power generation body, a vibrating diaphragm is installed in the cavity in a suspended mode, a second magnet is further installed in the cavity, a first magnet is installed on the vibrating diaphragm, a coil is fixed in the power generation body and arranged on the outer side of the first magnet, the vibrating diaphragm vibrates after being excited by a vibration source, and the first magnet reciprocates relative to the coil. The coil cuts a magnetic induction line of the first magnet to generate electromotive force and is electrically connected with a load; the vibration source drives the vibrating diaphragm to vibrate, the vibrating diaphragm drives the first magnet to reciprocate, the coil cuts magnetic induction lines of the first magnet to generate induced electromotive force, the electromotive force is transmitted to the load, and the problem that an existing vibration power generation assembly is unstable in power generation efficiency is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration source vibration power generation, in particular to a vibration power generation device. Background Art

[0002] A power generation device is installed in the vibration source of the car, which generates electricity and supplies power to the vibration source detection device, so that the vibration source detection device can provide the driver with information such as vibration source temperature and tire pressure. In order to enable the power generation device to continuously supply power to the vibration source detection device.

[0003] In the prior art, the power generation device in CN108370209A mainly uses a magnet suspended by a spring and a relatively fixed coil. When the vehicle travels at a certain speed, the vibration source has a certain rotation speed. The impact force on the grounding surface of the vibration source therefore has a grounding impact force with a certain deformation frequency. The grounding impact force drives the magnet to reciprocate, and the coil cuts the magnetic flux lines to generate electricity. The higher the frequency of the grounding impact force, the greater the power generation. However, the power generation effect of the power generation device is greatly restricted by the rotation speed of the vibration source. The spring that suspends the magnet itself has a natural frequency. Only when the external vibration frequency is an integer multiple of the natural frequency can it be truly Assuming a natural frequency of 9 Hz, corresponding to a vehicle speed of 60 kph, the generator only effectively generates electricity at specific speeds: 60, 120, 180, and 240 kph. At other speeds, such as from 60 kph to 90 kph, the efficiency decreases. This is because the ground contact frequency at 90 kph does not match the spring's natural frequency, and the ground contact force cannot trigger spring resonance. In real-world driving, vehicle speeds fluctuate constantly, and there is a positive correlation between vehicle speed and the frequency of the ground contact force. For example, a 255 / 55R16 vibration source: at 60 kph, the vibration source rotates at approximately 9 rpm, or 9 Hz. At this frequency, the generator cannot provide stable power to the vibration source detection device, resulting in inaccurate information about the vibration source's temperature and pressure. Furthermore, existing generators, designed to generate power from the ground contact force generated by the vibration source, employ a large number of spring structures, making them less reliable over extended periods of driving. Utility Model Content

[0004] The purpose of the utility model is to provide a vibration power generation device to solve the problem of insufficient power generation when relying on ground impact force to generate power in the process of different speeds in the prior art.

[0005] To achieve this purpose, the present invention adopts the following technical solution: The present invention provides a vibration power generation device, which includes a power generation body, a cavity is formed in the power generation body, a diaphragm is suspended in the cavity, a second magnet is also installed in the cavity, a first magnet is installed on the diaphragm, a coil is fixed in the power generation body, and the coil is arranged on the outside of the first magnet. The diaphragm vibrates after being excited by the vibration source, the first magnet reciprocates relative to the coil, and the coil cuts the magnetic lines of force of the first magnet to generate an electromotive force, and both ends of the coil are electrically connected to the electrical load.

[0006] Preferably, the vibration source is a tire, and a base is formed on the lower side of the power generation body, one side of the base is attached to the inner side of the vibration source, a lower support frame is installed on the upper side of the base, the lower support frame is annular, an upper support frame is installed on the upper side of the lower support frame, a vibration diaphragm is clamped between the upper support frame and the lower support frame, an annular groove is formed in the upper support frame, and a coil is installed in the annular groove.

[0007] Preferably, a second magnet is mounted on the base, and the first magnet and the second magnet do not contact each other.

[0008] Preferably, the second magnet and the first magnet have opposite polarities and are mounted on a side of the diaphragm close to the first magnet.

[0009] Preferably, the second magnet and the first magnet have the same polarity and are attracted to each other, and the second magnet is installed on a side of the diaphragm away from the second magnet.

[0010] Preferably, a gasket is installed on the upper side of the base, the gasket is made of rubber, and the second magnet is installed on the rubber.

[0011] Preferably, the second magnet is bonded to the base by glue, and the glue can absorb vibration after solidification.

[0012] Preferably, the diaphragm is made of polymer material or metal material.

[0013] Preferably, a first through hole is provided on the side wall of the lower support frame, a first chamber is formed between the diaphragm and the base, and the first chamber is connected to the interior of the vibration source through the first through hole.

[0014] Preferably, a cover plate is mounted on the upper support frame, a second through hole is formed on the cover plate, a second chamber is formed between the diaphragm and the cover plate, and the second chamber is connected to the interior of the vibration source through the second through hole.

[0015] Preferably, a filter cotton is installed on a side of the second through hole close to the diaphragm.

[0016] As a preference, the base is bonded to the inner side of the vibration source by glue, and the base, the upper support frame and the lower support frame are bonded to each other by glue or snap-fitted.

[0017] Beneficial effects: The compressed air inside the vibration source vibrates, and the vibration frequency is fixed, that is, it will not change with speed. The vibration source will cause the compressed air inside the vibration source to vibrate during the vibration process, thereby forming a cavity vibration. The cavity vibration will cause the air above and below the diaphragm to vibrate, thereby causing the vibration to follow. Since a first magnet is installed on the diaphragm, the first magnet will vibrate under the drive of the membrane, and the coil wound around the outside of the magnet will cut the magnetic flux lines formed by the first magnet, causing the coil to generate electricity and provide electrical energy for the electrical load. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional installation diagram of the vibration power generation device of the present invention (the first magnet and the second magnet repel each other);

[0019] Figure 2 This is a cross-sectional installation diagram of the vibration power generation device of the present invention (the first magnet and the second magnet attract each other).

[0020] In the figure: 1. base; 2. upper support frame; 3. lower support frame; 31. first through hole; 4. diaphragm; 5. first magnet; 6. second magnet; 7. coil; 8. first chamber; 9. second chamber; 10. cover; 101. second through hole; 20. vibration source; 30. gasket. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0022] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0024] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0025] Under the existing technology, the vibration caused by the vibration source directly drives the magnet to vibrate, causing the coil to cut the magnetic lines of force, and the power generation is positively correlated with the frequency of the vibration. When the frequency of the vibration source is low and unstable, the power generation device cannot provide stable power to the electrical load and cannot provide stable power to loads such as tire pressure detectors.

[0026] In order to solve the above problems, Figures 1 to 2 As shown, the utility model provides a vibration power generation device, including a power generation body, a cavity is formed in the power generation body, a diaphragm 4 is suspended in the cavity, a second magnet 6 is also installed in the cavity, a first magnet 5 is installed on the diaphragm 4, a coil 7 is fixed in the power generation body, and the coil 7 is arranged on the outside of the first magnet 5. The diaphragm 4 vibrates after being excited by the vibration source 20, and the first magnet 5 reciprocates relative to the coil 7. The coil 7 cuts the magnetic lines of force of the first magnet 5 to generate an electromotive force, and both ends of the coil 7 are electrically connected to the electrical load.

[0027] The vibration source 20 drives the diaphragm 4 to vibrate by vibrating. At this time, the first magnet 5 is driven to vibrate through the diaphragm 4. The second magnet 6 limits the first magnet 5 to prevent the vibration amplitude of the second magnet 6 from being too large. During the vibration of the first magnet 5, its own magnetic flux lines are cut by the coil 7, and the coil 7 provides electrical energy to the external load.

[0028] A base 1 is formed on the lower side of the power generation body, and one side of the base 1 is attached to the inner side of the vibration source 20. A lower support frame 3 is installed on the upper side of the base 1. The lower support frame 3 is annular, and an upper support frame 2 is installed on the upper side of the lower support frame 3. A diaphragm 4 is clamped between the upper support frame 2 and the lower support frame 3. A first magnet 5 is installed on the diaphragm 4. The diaphragm 4 drives the first magnet 5 to move. An annular groove is formed in the upper support frame 2, and a coil 7 is installed in the annular groove. The coil 7 is electrically connected to the electrical load.

[0029] The vibration source 20 used in the present invention is a tire, and the vibration power generation device is installed on the inner wall of the tire. It should be noted that the present invention can also use other vibration sources 20 in combination with the vibration power generation device to generate electricity. No matter at what speed the tire rolls, the compressed air inside the tire will vibrate. At the same time, when the tire rotates from low speed to high speed, the frequency of the air vibration inside the tire is between 180 and 250 Hz, which is much higher than the frequency of the tire's own vibration. During the air vibration process, the diaphragm 4 will vibrate, thereby causing the first magnet 5 on the diaphragm 4 to vibrate under the drive of the diaphragm 4. A fixed coil 7 is installed in the upper support frame 2, and the first magnet 5 and the surrounding magnetic flux lines will vibrate at a high frequency, causing the coil 7 to cut the magnetic flux lines. At the same time, the first magnet 5 is magnetically constrained by the second magnet 6, so that the first magnet 5 can vibrate stably back and forth, so that the coil 7 can generate electricity to provide electrical energy for the tire pressure detector. Due to the high vibration frequency, stable electrical energy can be provided for electrical loads such as the tire pressure detector.

[0030] It should be noted that the tire pressure sensor used in the present invention can also be other forms of loads, and the vibration power generation device can supply power to different forms of loads, thereby realizing different detection functions.

[0031] A second magnet 6 is installed on the base 1, and the first magnet 5 and the second magnet 6 do not contact each other. By installing the second magnet 6, the first magnet 5 and the second magnet 6 can constrain each other through repulsion or attraction, which can avoid the diaphragm 4 driven by the first magnet 5 from moving too much, thereby reducing the probability of damage to the vibration power generation device.

[0032] When the second magnet 6 and the first magnet 5 have opposite polarities and are repelled, the second magnet 6 is installed on the side of the diaphragm 4 close to the first magnet 5. The repulsive force between the first magnet 5 and the second magnet 6 can reset the diaphragm 4 when it is impacted, and at the same time can keep the first magnet 5 in a suspended state so that it will not hit the base 1.

[0033] The second magnet 6 and the first magnet 5 have the same polarity and are attracted to each other. The second magnet 6 is installed on the side of the diaphragm 4 away from the second magnet 6. This prevents the first magnet 5 from colliding with the top cover 10 during vibration and also allows the first magnet 5 to quickly reset. Typically, the second magnet 6 is glued to the diaphragm 4.

[0034] The second magnet 6 can be directly bonded to the base 1 by glue. After the glue solidifies, it has a certain elasticity and can absorb vibration, so that the second magnet 6 can be stably fixed on the base 1 and extend its service life.

[0035] Alternatively, a gasket 30 is installed on the upper side of the base 1 by glue. The gasket 30 is made of rubber, and the second magnet 6 is installed on the rubber. The gasket 30 can protect the second magnet 6 to prevent the second magnet 6 from breaking after being impacted by the road surface.

[0036] The diaphragm 4 is made of polymer material or metal material but is not limited to the above two materials. The diaphragm 4 can drive the first magnet 5 to vibrate at a high frequency, so that the magnetic flux lines of the first magnet 5 reciprocate to cut the coil 7, so that the coil 7 can generate current for power generation.

[0037] The sidewall of the lower support frame 3 of the present invention is provided with a first through hole 31, and a first chamber 8 is formed between the diaphragm 4 and the base 1. The first chamber 8 is connected to the interior of the tire through the first through hole 31. This allows the first chamber 8 to maintain a balance between the air pressure inside the tire and the outside world. When the diaphragm 4 compresses the air in the first chamber 8, the air can be discharged through the first through hole 31. When the diaphragm 4 moves away from the first chamber 8, air can be replenished into the first chamber 8 through the first through hole 31, so that the air pressure in the first chamber 8 remains balanced, allowing the diaphragm 4 to vibrate at a normal amplitude and avoid being stuck by the air pressure in the first chamber 8 and being unable to move.

[0038] A cover plate 10 is installed on the upper support frame 2, and a second through hole 101 is opened on the cover plate 10. The diaphragm 4 and the cover plate 10 form a second chamber 9, and the second chamber 9 is connected with the inside of the tire through the second through hole 101. When the diaphragm 4 is compressed toward the second chamber 9, the air in the second chamber 9 can be discharged to the outside along the second through hole 101. If the diaphragm 4 moves away from the second chamber 9, the space in the second chamber 9 becomes larger, and the air in the tire can enter the second chamber 9 along the second through hole 101, so that the second chamber 9 maintains air pressure balance, and the diaphragm 4 can drive the first magnet 5 to vibrate with a normal amplitude.

[0039] A filter cotton can be installed on the side of the second through hole 101 close to the diaphragm 4. The filter cotton can prevent impurities in the tire from entering the vibration power generation device through the second through hole 101, thereby protecting the diaphragm 4.

[0040] The vibration power generation device of the present invention is bonded together by glue, the base 1 is bonded to the inner side of the tire by glue, the base 1, the upper support frame 2 and the lower support frame 3 are bonded to each other by glue, so that the vibration power generation device has higher integrity, or the base 1, the upper support frame 2 and the lower support frame 3 are connected in the form of a snap buckle, which is convenient for workers to assemble, has a simple structure and higher reliability.

[0041] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A vibration power generation device, characterized in that: The invention comprises a power generation body, wherein a cavity is formed in the power generation body, a diaphragm (4) is suspended in the cavity, a second magnet (6) is also installed in the cavity, a first magnet (5) is installed on the diaphragm (4), a coil (7) is fixed in the power generation body, and the coil (7) is arranged outside the first magnet (5), the diaphragm (4) vibrates after being excited by a vibration source (20), the first magnet (5) reciprocates relative to the coil (7), the coil (7) cuts the magnetic flux lines of the first magnet (5) to generate an electromotive force, and the two ends of the coil (7) are connected to an electrical load.

2. The vibration power generation device according to claim 1, wherein: The vibration source (20) is a tire, a base (1) is formed on the lower side of the power generation body, one side of the base (1) is attached to the inner side of the vibration source (20), a lower support frame (3) is installed on the upper side of the base (1), the lower support frame (3) is annular, an upper support frame (2) is installed on the upper side of the lower support frame (3), a vibration membrane (4) is sandwiched between the upper support frame (2) and the lower support frame (3), an annular groove is formed in the upper support frame (2), and a coil (7) is installed in the annular groove.

3. The vibration power generation device according to claim 2, wherein: A second magnet (6) is mounted on the base (1), and the first magnet (5) and the second magnet (6) do not contact each other.

4. The vibration power generation device according to claim 3, wherein: The second magnet (6) and the first magnet (5) have opposite polarities and are repelled from each other. The second magnet (6) is mounted on a side of the diaphragm (4) close to the first magnet (5).

5. The vibration power generation device according to claim 3, wherein: The second magnet (6) and the first magnet (5) are attracted in polarity, and the second magnet (6) is mounted on a side of the diaphragm (4) away from the second magnet (6).

6. The vibration power generation device according to claim 3, wherein: A gasket (30) is installed on the upper side of the base (1), the gasket (30) is made of rubber, and the second magnet (6) is installed on the rubber.

7. The vibration power generation device according to claim 2, wherein: The second magnet (6) is bonded to the base (1) by glue, and the glue can absorb vibration after solidification.

8. The vibration power generation device according to claim 1, wherein The diaphragm (4) is made of a polymer material or a metal material.

9. The vibration power generation device according to claim 2, wherein: A first through hole (31) is provided on the side wall of the lower support frame (3), a first chamber (8) is formed between the diaphragm (4) and the base (1), and the first chamber (8) is connected to the interior of the vibration source (20) through the first through hole (31).

10. The vibration power generation device according to claim 2, wherein: A cover plate (10) is installed on the upper support frame (2), a second through hole (101) is provided on the cover plate (10), a second chamber (9) is formed between the diaphragm (4) and the cover plate (10), and the second chamber (9) is connected to the interior of the vibration source (20) through the second through hole (101).

11. The vibration power generation device according to claim 10, wherein: Filter cotton is installed on a side of the second through hole (101) close to the diaphragm (4).

12. The vibration power generation device according to claim 2, wherein: The base (1) is bonded to the inner side of the vibration source (20) by glue, and the base (1), the upper support frame (2) and the lower support frame (3) are bonded to each other by glue or connected by snap fasteners.

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