CN113323830A - Motion conversion mechanism and method for converting vibration and swing into unidirectional rotation - Google Patents
Motion conversion mechanism and method for converting vibration and swing into unidirectional rotation Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/08—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
- H02K7/061—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
- H02K7/07—Means for converting reciprocating motion into rotary motion or vice versa using pawls and ratchet wheels
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Abstract
The invention belongs to the technical field of mechanical transmission and energy conversion, and particularly relates to a motion conversion mechanism and a motion conversion method for converting vibration and swing into unidirectional rotation, which are characterized in that: the vibration energy output device at least comprises a cylindrical shell (1), a vibration energy input unit and a rotation output unit, wherein the vibration energy input unit and the rotation output unit are respectively and coaxially connected on a concentric shaft in the cavity of the cylindrical shell through a radial bearing (2) in a shaft mode, the vibration energy input unit is connected with the rotation output unit through an elastic plectrum, and vibration energy is converted into shaft rotation motion of the rotation output unit through the vibration energy input unit to be output. The motion conversion mechanism and the method have the advantages of simple structure, small size, flexible use mode and strong adaptability, and can convert vibration and swing in the surrounding environment into unidirectional rotation.
Description
Technical Field
The invention belongs to the technical field of mechanical transmission and energy conversion, and particularly relates to a motion conversion mechanism and a motion conversion method for converting vibration and swing into unidirectional rotation.
Background
A motion conversion mechanism that converts vibration into rotational motion is widely used in practice. Typical mechanisms that convert vibration into rotational motion include rack and pinion mechanisms, for example, with rack and pinion cylinders converting vibration into rotational motion, and ratchet and pawl mechanisms, for example, with casting robots in foundries converting vibration into rotational motion.
In recent years, with the rapid development of energy collection technology, various miniaturized energy harvesters are emerging and integrated with various low-power-consumption electronic devices, and self-powered, self-driven and self-maintained microsystems and microdevices are expected to be realized. The motion conversion mechanism for converting vibration into rotary motion provides a new idea for the design of the energy harvester and the collection of vibration energy.
Typical motion conversion mechanisms for energy harvesting are e.g. Zhongjie Li, Lei Zuo, Jian Kuang and George Luhrs, Smart Materials and Structures 22 (2013): 025008 written "Energy-absorbing shock absorber with a mechanical motion corrector" ("Energy-capturing shock absorber with mechanical motion corrector" ("intelligent materials and structures"). This document uses a rack and pinion mechanism to convert vibration into bi-directional rotational motion.
Typical motion conversion mechanisms for energy harvesting are exemplified by Yulong Zhang, Anxin Luo, Yifan Wang, Xiangtian Dai, Yan Lu, Fei Wang in Applied Physics Letters 116 (2020): 053902 written, "Rotational electromagnetic energy harvester for human motion at low frequency" ("applied physical flash"). The paper converts vibration into unidirectional rotational motion through a torsional drive structure and a ratchet-pawl mechanism.
Typical motion conversion mechanisms for Energy harvesting are, for example, Qinxue Tan, Kangqi Fan, Kai Tao, Liya Zhao, Meiling Cai in Energy 196 (2020): 117107 written, "A two-degree-of-free driving rotor for influencing energy generation from ultra-low frequency excitation" ("energy source" driving rotor by two-degree-of-freedom wire rope capable of effectively collecting energy from ultra-low frequency excitation). The document converts vibrations into a bidirectional rotational movement by means of a two-wire driven rotor structure.
The above motion conversion mechanism has disadvantages in that: (1) the gear rack mechanism and the ratchet wheel and pawl mechanism have complex structures and large volumes and are difficult to integrate with low-power-consumption electronic equipment; (2) the two-way rotation state of the rotor structure driven by the cord is unstable, and the energy loss is large; (3) various mechanical vibrations exist in the surrounding environment, and a large amount of swinging motion exists, such as swinging of tree branches, motion of human bodies, wave motion and the like. The above-mentioned device can only convert the vibration into a rotational movement and cannot adapt to the oscillating movement which is present in large quantities in the environment.
In order to solve the problems of the motion conversion mechanism, the invention provides the motion conversion mechanism and the method which have the advantages of simple structure, no limitation of resonance working conditions, strong adaptability, flexible and various use modes, and capability of converting vibration and swing into unidirectional rotation by combining with different energy conversion mechanisms.
Disclosure of Invention
Aiming at the defects of the existing motion conversion mechanism, the invention provides the motion conversion mechanism and the method which have simple structure, small size, flexible use mode and strong adaptability and can convert the vibration and the swing in the surrounding environment into the unidirectional rotation.
The technical scheme of the invention is realized as follows: a motion conversion mechanism for converting vibration and oscillation into unidirectional rotation, characterized in that: the vibration energy output device at least comprises a cylindrical shell (1), a vibration energy input unit and a rotation output unit, wherein the vibration energy input unit and the rotation output unit are respectively and coaxially connected on a concentric shaft in the cavity of the cylindrical shell through a radial bearing (2) in a shaft mode, the vibration energy input unit is connected with the rotation output unit through an elastic plectrum, and vibration energy is converted into shaft rotation motion of the rotation output unit through the vibration energy input unit to be output.
The vibration energy input unit comprises an eccentric rotor (4) and a second radial bearing (2-2), the eccentric rotor (4) is sleeved on the second radial bearing (2-2), a concentric shaft in a cylindrical shell cavity (1) comprises a first central shaft (1-3-1) and a second central shaft (1-3-2), and an inner ring of the first radial bearing (2-1) is fixedly connected with the first central shaft (1-3-1); the inner ring of the second radial bearing (2-2) is fixedly connected with the second central shaft (1-3-2).
The rotation output unit at least comprises: cylindrical shell (1), plectrum (5), journal bearing (2), rotor (3) are connected with cylindrical shell (1) inner chamber axle concentric shaft through journal bearing (2), eccentric rotor (4) of vibration energy input unit pass through plectrum (5) and rotor (3) dentate inner wall sliding connection, eccentric rotor (4) receive the vibration influence can radially rotate around first journal bearing (2-1) of bearing (2), stir rotor (3) dentate inner wall through plectrum (5) simultaneously and slide, drive second journal bearing (2-2) by rotor (3) and rotate.
The cylindrical shell (1) comprises a cylindrical barrel (1-1), a barrel cover (1-2) and a stepped shaft (1-3); the cylindrical barrel (1-1) comprises a first ear-shaped outer edge (1-1-1), a first ear-shaped outer edge (1-1-2), a first small through hole (1-1-3) and a first small through hole (1-1-4); the first ear-shaped outer edge (1-1-1) and the first ear-shaped outer edge (1-1-2) are positioned at any symmetrical position of the outer edge of the cylindrical barrel (1-1); the first small through hole (1-1-3) and the first small through hole (1-1-4) are respectively positioned on the first ear-shaped outer edge (1-1-1) and the first ear-shaped outer edge (1-1-2); the cylinder cover (1-2) comprises a second ear-shaped outer edge (1-2-1), a second ear-shaped outer edge (1-2-2), a second small through hole (1-2-3) and a second small through hole (1-2-4); the second ear-shaped outer edge (1-2-1) and the second ear-shaped outer edge (1-2-2) are positioned at any symmetrical position of the outer edge of the cylinder cover (1-2).
The second small through hole (1-2-3) and the second small through hole (1-2-4) are respectively positioned on the second ear-shaped outer edge (1-2-1) and the second ear-shaped outer edge (1-2-2); the stepped shaft comprises a first central shaft (1-3-1) and a second central shaft (1-3-2), and the first central shaft and the second central shaft are in cylindrical stepped shapes; the first central shaft (1-3-1) is vertically and fixedly connected with the center of the cylindrical barrel (1-1); the second central shaft (1-3-2) is vertically and fixedly connected with the center of the first central shaft (1-3-1).
The rotor (3) comprises a cylindrical barrel (3-1), a toothed inner wall (3-2) and a first through hole (3-3); the toothed inner walls (3-2) are arranged at intervals to form inner wall toothed continuous circulation, and are uniformly distributed on the inner surface of the cylindrical barrel (3-1) in a ratchet shape; the first through hole (3-3) is positioned in the center of the rotor (3) and is coaxial with the rotor (3).
The rotor (3) is fixedly connected with the outer ring of the first radial bearing (2-1); the inner ring of the second radial bearing (2-2) is fixedly connected with a second central shaft (1-3-2) of the cylindrical shell (1); the eccentric rotor (4) is fixedly connected with the outer ring of the second radial bearing (2-2); the bottom end (clamping end) of the shifting sheet (5) is fixed in the groove of the eccentric rotor (4) in a bonding mode; the cylinder cover (1-2) is fixedly connected with the cylinder (1-1) through a bolt and a nut, and the whole device is packaged into a whole.
The eccentric rotor (4) comprises a sector disc (4-1), a groove (4-2) and a second through hole (4-3); the groove (4-2) is positioned at the outer edge of the sector disc (4-1) and is in a vertical opening shape, and a certain distance is reserved between the groove and the outer edge; the second through hole (4-3) is positioned at the axle center of the fan-shaped disc (4-1).
The plectrum (5) comprises a rigid layer (5-1), an elastic layer (5-2) and an additional layer (5-3); the elastic layer (5-2) is placed on the left side of the rigid layer (5-1) in an upright mode, the length of the elastic layer (5-2) is slightly longer than that of the rigid layer (5-1), the elastic layer (5-2) is fixedly connected with the bottom end (clamping end) of the rigid layer (5-1), and the tail ends (free ends) with different lengths can be freely separated; the additional layer (5-3) is fixedly connected with the tail end (free end) of the elastic layer (5-2).
A motion conversion method for converting vibration and swing into unidirectional rotation is characterized in that: under the action of vibration, the eccentric rotor swings, the swinging direction of the eccentric rotor is different due to different directions and positions of vibration sources, and the shifting piece is of an elastic two-layer cantilever type structure, so that the effective length of an elastic layer of the shifting piece is variable, and the rigidity of the two layers of cantilever type shifting pieces is also variable; when vibration and oscillatory excitation in the environment is applied to the eccentric rotor;
the eccentric rotor swings anticlockwise relative to the rotor, the elastic layer of the shifting sheet is arranged on the left side of the rigid layer, the part of the elastic layer, which is slightly longer than the rigid layer, collides with the toothed inner wall of the rotor, and due to the existence of the rigid layer, the effective length of the elastic layer is obviously shortened, so that the rigidity of the elastic layer is increased; in addition, due to the existence of the additional layer at the tail end of the elastic layer, the driving rigidity of the poking sheet in the anticlockwise direction is higher, so that the rotor is driven to rotate anticlockwise;
when the eccentric rotor swings clockwise relative to the rotor, the elastic layer of the shifting sheet generates sliding friction with the toothed inner wall of the rotor, the elastic layer is bent and separated from the tail end of the rigid layer, the effective length of the elastic layer is long, the rigidity of the elastic layer is small, therefore, the friction force of the shifting sheet acting on the toothed inner wall of the rotor is small, and the rotor is still in an anticlockwise rotating motion state due to large moment of inertia; the external excitation acts on the eccentric rotor periodically, the eccentric rotor swings clockwise and anticlockwise alternately periodically, and the rotor 3 is in the anticlockwise rotating motion state all the time.
The working principle of the invention is as follows:
under the condition that the swing directions of the eccentric rotors are different, the effective length of the elastic layer of the shifting piece can be changed, so that the rigidity of the two layers of cantilever type shifting pieces can be changed; when vibration and oscillation excitation in the environment are applied to the eccentric rotor, the eccentric rotor oscillates anticlockwise relative to the rotor, the elastic layer of the plectrum is arranged on the left side of the rigid layer, a part of the elastic layer, which is slightly longer than the rigid layer, collides with the toothed inner wall of the rotor, and due to the existence of the rigid layer, the effective length (from the free end of the rigid layer to the free end of the elastic layer) of the elastic layer is obviously shortened, so that the rigidity of the elastic layer is increased. In addition, due to the existence of the additional layer at the tail end (free end) of the elastic layer, the driving rigidity of the poking sheet in the anticlockwise direction is higher, so that the rotor is driven to rotate anticlockwise; when the eccentric rotor swings clockwise relative to the rotor, the elastic layer of the shifting sheet generates sliding friction with the toothed inner wall of the rotor, the elastic layer is bent and separated from the tail end (free end) of the rigid layer, the effective length (from the clamping end of the elastic layer to the free end of the elastic layer) of the elastic layer is longer, so that the rigidity of the elastic layer is smaller, the friction force of the shifting sheet acting on the toothed inner wall of the rotor is smaller, and the rotor is still in an anticlockwise rotation motion state due to larger moment inertia; the external excitation acts on the eccentric rotor periodically, the eccentric rotor swings clockwise and anticlockwise alternately periodically, and the rotor is in the anticlockwise rotation motion state all the time.
Compared with the prior art, the invention has the beneficial effects that:
(1) the structure is simple, and the rotor is driven only by the eccentric rotor and the two layers of shifting sheets with the function of automatically converting rigidity; (2) the eccentric rotor is not limited by resonance working conditions, and as long as vibration and swing excitation exist outside, the eccentric rotor can stably rotate at a high speed in a one-way mode through the plectrum driving rotor; (3) the adaptability is strong, and the vibration excitation and the swing excitation can be adapted; (4) the energy harvester is widely applied in the field of energy collection, is flexible and various in use mode, and can be combined with different energy conversion mechanisms (such as electromagnetic induction effect, electrostatic effect, triboelectric effect and the like) to design different energy harvesters so as to adapt to different application scenes.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
FIG. 1 is an exploded view of an embodiment of the present invention;
FIG. 2 is a schematic view of a cylindrical housing;
FIG. 3 is a schematic view of a rotor structure;
FIG. 4 is a schematic view of an eccentric rotor configuration;
FIG. 5a is a schematic view of a structure of a pick in accordance with embodiment 1;
FIG. 5b is a schematic diagram of the structure of the pick of embodiment 2;
fig. 6 is an overall assembly diagram of the present invention.
In the figure: 1. a cylindrical housing; 2. a radial bearing; 3. a rotor; 4. an eccentric rotor; 5. a shifting sheet.
Detailed Description
Example 1
As shown in fig. 1 to 6, a motion conversion mechanism and a method for converting vibration and swing into unidirectional rotation at least comprises a cylindrical shell 1, a vibration energy input unit and a rotation output unit, wherein the vibration energy input unit and the rotation output unit are respectively and coaxially connected on a concentric shaft in a cavity of the cylindrical shell 1 through a radial bearing 2, the vibration energy input unit is connected with the rotation output unit through an elastic plectrum, and the vibration energy is converted into shaft rotation of the rotation output unit through the vibration energy input unit to output energy.
As shown in fig. 1 and fig. 2, the radial bearing 2 comprises a first radial bearing 2-1 and a second radial bearing 2-2, the vibration energy input unit comprises an eccentric rotor 4 and the second radial bearing 2-2, the eccentric rotor 4 is sleeved on the second radial bearing 2-2, a concentric shaft in a cavity of the cylindrical shell 1 comprises a first central shaft 1-3-1 and a second central shaft 1-3-2, and an inner ring of the first radial bearing 2-1 is fixedly connected with the first central shaft 1-3-1; and the inner ring of the second radial bearing 2-2 is fixedly connected with the second central shaft 1-3-2.
The rotation output unit includes at least: cylindrical shell 1, plectrum 5, journal bearing 2, rotor 3 passes through journal bearing 2 and 1 inner chamber axle concentric shaft of cylindrical shell and is connected, and vibration energy input unit's eccentric rotor 4 passes through plectrum 5 and 3 dentate inner walls sliding connection of rotor, and eccentric rotor 4 receives the vibration influence and can radially rotate around bearing 2's first journal bearing 2-1, stirs 3 dentate inner walls of rotor through plectrum 5 and slide simultaneously, drives second journal bearing 2-2 by rotor 3 and rotates.
The cylindrical shell 1 comprises a cylindrical barrel 1-1, a barrel cover 1-2 and a stepped shaft 1-3; the cylindrical barrel 1-1 comprises a first ear-shaped outer edge 1-1-1, a first ear-shaped outer edge 1-1-2, a first small through hole 1-1-3 and a first small through hole 1-1-4; the first ear-shaped outer edge 1-1-1 and the first ear-shaped outer edge 1-1-2 are positioned at any symmetrical position of the outer edge of the cylinder 1-1; the first small through hole 1-1-3 and the first small through hole 1-1-4 are respectively positioned on the first ear-shaped outer edge 1-1-1 and the first ear-shaped outer edge 1-1-2; the cylinder cover 1-2 comprises a second ear-shaped outer edge 1-2-1, a second ear-shaped outer edge 1-2-2, a second small through hole 1-2-3 and a second small through hole 1-2-4; the second ear-shaped outer edge 1-2-1 and the second ear-shaped outer edge 1-2-2 are positioned at any symmetrical position of the outer edge of the cylinder cover 1-2.
The second small through hole 1-2-3 and the second small through hole 1-2-4 are respectively positioned on the second ear-shaped outer edge 1-2-1 and the second ear-shaped outer edge 1-2-2; the stepped shaft comprises a first central shaft 1-3-1 and a second central shaft 1-3-2 which are in a cylindrical stepped shape; the first central shaft 1-3-1 is vertically and fixedly connected with the center of the cylindrical barrel 1-1; the second central shaft 1-3-2 is vertically and fixedly connected with the center of the first central shaft 1-3-1.
As shown in fig. 3, the rotor 3 comprises a cylindrical barrel 3-1, a toothed inner wall 3-2 and a first through hole 3-3; the toothed inner walls 3-2 are arranged at intervals to form inner wall toothed continuous circulation, and are uniformly distributed on the inner surface of the cylindrical barrel 3-1 in a ratchet shape; the first through hole 3-3 is located in the center of the rotor 3 and is coaxial with the rotor 3.
The rotor 3 is fixedly connected with the outer ring of the first radial bearing 2-1; the inner ring of the second radial bearing 2-2 is fixedly connected with a second central shaft 1-3-2 of the cylindrical shell 1; the eccentric rotor 4 is fixedly connected with the outer ring of the second radial bearing 2-2; the bottom end (clamping end) of the plectrum 5 is fixed in the groove of the eccentric rotor 4 in a bonding way; the cylinder cover 1-2 is fixedly connected with the cylinder 1-1 through bolts and nuts, and the whole device is packaged into a whole.
As shown in fig. 4, the eccentric rotor 4 comprises a sector disc 4-1, a groove 4-2 and a second through hole 4-3; the groove 4-2 is positioned at the outer edge of the sector disc 4-1 and is in a vertical opening shape, and a certain distance is reserved between the groove and the outer edge; the second through hole 4-3 is positioned at the axle center of the sector disc 4-1.
As shown in fig. 5 (a), the pick 5 comprises a rigid layer 5-1, an elastic layer 5-2, and an additional layer 5-3; the elastic layer 5-2 is vertically arranged on the left side of the rigid layer 5-1, the length of the elastic layer 5-2 is slightly longer than that of the rigid layer 5-1, the elastic layer 5-2 is fixedly connected with the bottom end (clamping end) of the rigid layer 5-1, and the tail ends (free ends) with different lengths can be freely separated; the additional layer 5-3 is fixedly connected to the end (free end) of the elastic layer 5-2.
Under the action of vibration, the eccentric rotor 4 swings, the swinging direction of the eccentric rotor 4 is different due to different vibration source directions and positions, and the shifting piece 5 is of an elastic two-layer cantilever type structure, so that the effective length of an elastic layer of the shifting piece 5 is variable, and the rigidity of the two layers of cantilever type shifting pieces is also variable; when vibration and oscillation excitation in the environment is applied to the eccentric rotor 4;
the eccentric rotor 4 swings counterclockwise relative to the rotor 3, the elastic layer of the plectrum 5 is arranged at the left side of the rigid layer, the part of the elastic layer which is slightly longer than the rigid layer collides with the toothed inner wall of the rotor, and due to the existence of the rigid layer, the effective length of the elastic layer (from the free end of the rigid layer to the free end of the elastic layer) is obviously shortened, so that the rigidity of the elastic layer is increased. In addition, due to the existence of the additional layer at the tail end (free end) of the elastic layer, the driving rigidity of the poking piece 5 in the anticlockwise direction is higher, so that the rotor 3 is driven to rotate anticlockwise;
when the eccentric rotor 4 swings clockwise relative to the rotor 3, the elastic layer of the plectrum 5 generates sliding friction with the toothed inner wall of the rotor, the elastic layer bends and is separated from the tail end (free end) of the rigid layer, the effective length (from the clamping end of the elastic layer to the free end of the elastic layer) of the elastic layer is longer, so that the rigidity of the elastic layer is smaller, the friction force of the plectrum 5 acting on the toothed inner wall of the rotor 3 is smaller, and the rotor 3 is still in a counterclockwise rotation motion state due to larger moment of inertia; the external excitation is periodically acted on the eccentric rotor 4, the eccentric rotor 4 periodically swings clockwise and anticlockwise alternately, and the rotor 3 is always in the anticlockwise rotating motion state.
Example 2
This example 2 is substantially the same as example 1, and is characterized in that:
as shown in fig. 5 (b), the design of the pick 5 is similar to that of the first embodiment, except for the fixing position of the pick. In the first embodiment, the bottom end (clamping end) of the pulling sheet is fixed in the groove of the eccentric rotor, the opening direction of the groove is perpendicular to the horizontal line direction, and the opening direction of the groove in the second embodiment has a certain included angle (less than 90 °) with the horizontal line direction. Therefore, the paddle in this embodiment is fixed in the groove of the eccentric rotor in an inclined manner. The inclined plectrum not only can provide bigger driving force for the rotor, but also can further reduce the frictional force of plectrum and rotor dentate inner wall. When the eccentric rotor swings counterclockwise relative to the rotor, part of the driving force of the inclined plectrum is provided by the axial compression force of the elastic layer, so that the driving force of the plectrum to the rotor is increased. When the eccentric rotor swings clockwise relative to the rotor, sliding friction occurs between the shifting piece and the inner wall of the rotor, so that the elastic layer of the shifting piece is bent, and compared with the first embodiment, the bending deformation of the shifting piece is smaller, and the sliding friction resistance is further reduced. Besides the above two embodiments, the action mode of the plectrum and the rotor in the invention can also adopt an external dialing mode, namely the plectrum and the external teeth of the rotor interact. The present invention is not intended to be exhaustive, but the technical solution for explaining the present invention is not limited to the above embodiments, and various changes and combinations may be made according to the purpose of the invention.
The parts of the present embodiment not described in detail are common means known in the art, and are not described here. The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation, characterized in that: the vibration energy output device at least comprises a cylindrical shell (1), a vibration energy input unit and a rotation output unit, wherein the vibration energy input unit and the rotation output unit are respectively and coaxially connected on a concentric shaft in the cavity of the cylindrical shell through a radial bearing (2) in a shaft mode, the vibration energy input unit is connected with the rotation output unit through an elastic plectrum, and vibration energy is converted into shaft rotation motion of the rotation output unit through the vibration energy input unit to be output.
2. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation as claimed in claim 1, wherein: the vibration energy input unit comprises an eccentric rotor (4) and a second radial bearing (2-2), the eccentric rotor (4) is sleeved on the second radial bearing (2-2), a concentric shaft in a cylindrical shell cavity (1) comprises a first central shaft (1-3-1) and a second central shaft (1-3-2), and an inner ring of the first radial bearing (2-1) is fixedly connected with the first central shaft (1-3-1); the inner ring of the second radial bearing (2-2) is fixedly connected with the second central shaft (1-3-2).
3. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation as claimed in claim 1, wherein: the rotation output unit at least comprises: cylindrical shell (1), plectrum (5), journal bearing (2), rotor (3) are connected with cylindrical shell (1) inner chamber axle concentric shaft through journal bearing (2), eccentric rotor (4) of vibration energy input unit pass through plectrum (5) and rotor (3) dentate inner wall sliding connection, eccentric rotor (4) receive the vibration influence can radially rotate around first journal bearing (2-1) of bearing (2), stir rotor (3) dentate inner wall through plectrum (5) simultaneously and slide, drive second journal bearing (2-2) by rotor (3) and rotate.
4. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation as claimed in claim 1, wherein: the cylindrical shell (1) comprises a cylindrical barrel (1-1), a barrel cover (1-2) and a stepped shaft (1-3); the cylindrical barrel (1-1) comprises a first ear-shaped outer edge (1-1-1), a first ear-shaped outer edge (1-1-2), a first small through hole (1-1-3) and a first small through hole (1-1-4); the first ear-shaped outer edge (1-1-1) and the first ear-shaped outer edge (1-1-2) are positioned at any symmetrical position of the outer edge of the cylindrical barrel (1-1); the first small through hole (1-1-3) and the first small through hole (1-1-4) are respectively positioned on the first ear-shaped outer edge (1-1-1) and the first ear-shaped outer edge (1-1-2); the cylinder cover (1-2) comprises a second ear-shaped outer edge (1-2-1), a second ear-shaped outer edge (1-2-2), a second small through hole (1-2-3) and a second small through hole (1-2-4); the second ear-shaped outer edge (1-2-1) and the second ear-shaped outer edge (1-2-2) are positioned at any symmetrical position of the outer edge of the cylinder cover (1-2).
5. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation as claimed in claim 4, wherein: the second small through hole (1-2-3) and the second small through hole (1-2-4) are respectively positioned on the second ear-shaped outer edge (1-2-1) and the second ear-shaped outer edge (1-2-2); the stepped shaft comprises a first central shaft (1-3-1) and a second central shaft (1-3-2), and the first central shaft and the second central shaft are in cylindrical stepped shapes; the first central shaft (1-3-1) is vertically and fixedly connected with the center of the cylindrical barrel (1-1); the second central shaft (1-3-2) is vertically and fixedly connected with the center of the first central shaft (1-3-1).
6. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation as claimed in claim 3, wherein: the rotor (3) comprises a cylindrical barrel (3-1), a toothed inner wall (3-2) and a first through hole (3-3); the toothed inner walls (3-2) are arranged at intervals to form inner wall toothed continuous circulation, and are uniformly distributed on the inner surface of the cylindrical barrel (3-1) in a ratchet shape; the first through hole (3-3) is positioned in the center of the rotor (3) and is coaxial with the rotor (3).
7. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation as claimed in claim 3, wherein: the rotor (3) is fixedly connected with the outer ring of the first radial bearing (2-1); the inner ring of the second radial bearing (2-2) is fixedly connected with a second central shaft (1-3-2) of the cylindrical shell (1); the eccentric rotor (4) is fixedly connected with the outer ring of the second radial bearing (2-2); the bottom end (clamping end) of the shifting sheet (5) is fixed in the groove of the eccentric rotor (4) in a bonding mode; the cylinder cover (1-2) is fixedly connected with the cylinder (1-1) through a bolt and a nut, and the whole device is packaged into a whole.
8. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation as claimed in claim 3, wherein: the eccentric rotor (4) comprises a sector disc (4-1), a groove (4-2) and a second through hole (4-3); the groove (4-2) is positioned at the outer edge of the sector disc (4-1) and is in a vertical opening shape, and a certain distance is reserved between the groove and the outer edge; the second through hole (4-3) is positioned at the axle center of the fan-shaped disc (4-1).
9. A motion conversion mechanism for converting vibration and oscillation into unidirectional rotation as claimed in claim 3, wherein: the plectrum (5) comprises a rigid layer (5-1), an elastic layer (5-2) and an additional layer (5-3); the elastic layer (5-2) is placed on the left side of the rigid layer (5-1) in an upright mode, the length of the elastic layer (5-2) is slightly longer than that of the rigid layer (5-1), the elastic layer (5-2) is fixedly connected with the bottom end (clamping end) of the rigid layer (5-1), and the tail ends (free ends) with different lengths can be freely separated; the additional layer (5-3) is fixedly connected with the tail end (free end) of the elastic layer (5-2).
10. A motion conversion method for converting vibration and swing into unidirectional rotation is characterized in that: under the action of vibration, the eccentric rotor swings, the swinging direction of the eccentric rotor is different due to different directions and positions of vibration sources, and the shifting piece is of an elastic two-layer cantilever type structure, so that the effective length of an elastic layer of the shifting piece is variable, and the rigidity of the two layers of cantilever type shifting pieces is also variable; when vibration and oscillatory excitation in the environment is applied to the eccentric rotor;
the eccentric rotor swings anticlockwise relative to the rotor, the elastic layer of the shifting sheet is arranged on the left side of the rigid layer, the part of the elastic layer, which is slightly longer than the rigid layer, collides with the toothed inner wall of the rotor, and due to the existence of the rigid layer, the effective length of the elastic layer is obviously shortened, so that the rigidity of the elastic layer is increased; in addition, due to the existence of the additional layer at the tail end of the elastic layer, the driving rigidity of the poking sheet in the anticlockwise direction is higher, so that the rotor is driven to rotate anticlockwise;
when the eccentric rotor swings clockwise relative to the rotor, the elastic layer of the shifting sheet generates sliding friction with the toothed inner wall of the rotor, the elastic layer is bent and separated from the tail end of the rigid layer, the effective length of the elastic layer is long, the rigidity of the elastic layer is small, therefore, the friction force of the shifting sheet acting on the toothed inner wall of the rotor is small, and the rotor is still in an anticlockwise rotating motion state due to large moment of inertia; the external excitation acts on the eccentric rotor periodically, the eccentric rotor swings clockwise and anticlockwise alternately periodically, and the rotor is in the anticlockwise rotation motion state all the time.
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| CN202110552096.2A CN113323830B (en) | 2021-05-20 | Motion conversion mechanism and method for converting vibration and swing into unidirectional rotation |
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|---|---|---|---|
| CN202110552096.2A CN113323830B (en) | 2021-05-20 | Motion conversion mechanism and method for converting vibration and swing into unidirectional rotation |
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| CN113323830A true CN113323830A (en) | 2021-08-31 |
| CN113323830B CN113323830B (en) | 2024-07-05 |
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