CN113029325A - Mechanical amplifier and household appliance - Google Patents
Mechanical amplifier and household appliance Download PDFInfo
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- CN113029325A CN113029325A CN201911346611.0A CN201911346611A CN113029325A CN 113029325 A CN113029325 A CN 113029325A CN 201911346611 A CN201911346611 A CN 201911346611A CN 113029325 A CN113029325 A CN 113029325A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
Abstract
The invention discloses a mechanical amplifier and a household appliance, wherein the mechanical amplifier comprises a transmission part, a central part, a connecting rod and a vibration sensor, the vibration sensor is arranged on the connecting rod, the connecting rod is connected with the transmission part and the central part, the transmission part is configured to drive the connecting rod and the vibration sensor to rotate around the central part, and the distance between the vibration sensor and the central part is larger than that between the transmission part and the central part. Among the above-mentioned mechanical amplifier, the driving medium can be fixed to the pendulum, drives connecting rod and vibration sensor by the driving medium and uses the centre piece to rotate as the center, because the distance of vibration sensor and centre piece is greater than the distance of driving medium and centre piece, this can make the rotary displacement that the vibration arouses enlarged in vibration sensor department, and then even under the less condition of vibration, also can obtain comparatively accurate vibration measurement signal, and then can assist the damping effect that promotes domestic appliance.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a mechanical amplifier and a household appliance.
Background
In the related art, when the washing machine vibrates, a sensor disposed on the washing machine may measure a vibration displacement of the washing machine and may perform balance compensation according to the vibration displacement to reduce or cancel the vibration. However, if the amplitude of the washing machine movement is too small, it may not be possible to obtain an accurate vibration measurement signal. This may result in a reduction in the accuracy of the balance compensation and a poor damping effect.
Disclosure of Invention
The embodiment of the invention provides a mechanical amplifier and a household appliance.
The mechanical amplifier comprises a transmission part, a central part, a connecting rod and a vibration sensor, wherein the vibration sensor is arranged on the connecting rod, the connecting rod is connected with the transmission part and the central part, the transmission part is configured to drive the connecting rod and the vibration sensor to rotate around the central part, and the distance between the vibration sensor and the central part is larger than that between the transmission part and the central part.
Among the above-mentioned mechanical amplifier, the driving medium can be fixed to the pendulum, drives connecting rod and vibration sensor by the driving medium and uses the centre piece to rotate as the center, because the distance of vibration sensor and centre piece is greater than the distance of driving medium and centre piece, this can make the rotary displacement that the vibration arouses enlarged in vibration sensor department, and then even under the less circumstances of vibration, also can obtain comparatively accurate vibration measurement signal.
In some embodiments, the transmission member is parallel to the central member, and the connecting rod connects the transmission member and the central member perpendicularly. Therefore, the structure is simple, the structure can be conveniently installed and used, an actuator does not need to be additionally added, and the amplification of the motion amplitude can be realized at low cost.
In some embodiments, the connecting rod is fixedly or rotationally connected to the center piece. Thus, the connecting rod can take the vibration sensor to realize rotation by taking the central piece as a center.
In some embodiments, the transmission member is fixedly or detachably connected to the connecting rod, and the center member is fixedly connected to the connecting rod. Therefore, the contact between the transmission piece and the connecting rod is kept, so that the transmission piece pushes the connecting rod to rotate, and the amplification of the motion amplitude is further realized.
In some embodiments, the transmission member is configured to drive the connecting rod and the vibration sensor to rotate around the center member in a first direction, the mechanical amplifier includes an elastic member disposed on the center member and connected to the connecting rod, the elastic member is configured to drive the connecting rod to drive the transmission member and the vibration sensor to rotate around the center member in a second direction, and the first direction is opposite to the second direction. So, can guarantee that the connecting rod is at the timely return of rotation in-process for connecting rod and driving medium contact all the time, carry out the enlargies of the motion amplitude of next time, obtain comparatively accurate measuring result.
In some embodiments, the mechanical amplifier comprises a base plate, the center piece is connected to the base plate, and the center piece is fixedly or rotatably connected to the base plate. Thus, the bottom plate can fix and support the mechanical amplifier, so that the mechanical amplifier can stably amplify motion amplitude.
In some embodiments, the vibration sensor includes at least one of an acceleration sensor, a velocity sensor, and a displacement sensor. Thus, the type of the vibration sensor can be flexibly selected.
In some embodiments, the connecting rod is provided with a through hole, and the transmission member can movably penetrate through the through hole. Thus, the longitudinal free movement of the transmission member can be ensured.
An embodiment of the invention provides a household appliance comprising the mechanical amplifier of any of the above embodiments.
Among the above-mentioned domestic appliance, the driving medium can be fixed to the pendulum, drives connecting rod and vibration sensor by the driving medium and uses the centre piece to rotate as the center, because the distance of vibration sensor and centre piece is greater than the distance of driving medium and centre piece, this can make the rotary displacement that the vibration arouses enlarged in vibration sensor department, and then even under the less circumstances of vibration, also can obtain comparatively accurate vibration measurement signal, and then can promote the damping effect.
In some embodiments, the household appliance includes a body and a cavity, the cavity is rotatably disposed in the body, the mechanical amplifier is located outside the body, and the transmission member is fixedly connected to the body. Therefore, the vibration amplitude of the household appliance can be accurately measured through the mechanical amplifier, and a more accurate measurement result can be obtained.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a perspective view of a mechanical amplifier of an embodiment of the present invention;
FIG. 2 is another perspective view of a mechanical amplifier of an embodiment of the present invention;
FIG. 3 is a schematic drawing of a portion of the dimensions of a mechanical amplifier of an embodiment of the present invention;
fig. 4 is a perspective view of a home appliance according to an embodiment of the present invention;
fig. 5 is another perspective view of the home appliance according to the embodiment of the present invention.
Description of the main element symbols: a mechanical amplifier 100, a household appliance 200;
the transmission piece 11, the central piece 12, the connecting rod 13, the first end 131, the second end 132, the vibration sensor 14, the elastic piece 15, the bottom plate 16 and the bulge 17;
Detailed Description
Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this specification, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1 to 3, an embodiment of the present invention provides a mechanical amplifier 100, including a transmission member 11, a center member 12, a connecting rod 13 and a vibration sensor 14, wherein the vibration sensor 14 is disposed on the connecting rod 13, the connecting rod 13 connects the transmission member 11 and the center member 12, the transmission member 11 is configured to drive the connecting rod 13 and the vibration sensor 14 to rotate around the center member 12, and a distance H1 between the vibration sensor 14 and the center member 12 is greater than a distance H2 between the transmission member 11 and the center member 12.
In the above-mentioned mechanical amplifier 100, the transmission member 11 can be fixed to the vibrating body, the transmission member 11 drives the connecting rod 13 and the vibration sensor 14 to rotate around the center 12, and since the distance between the vibration sensor 14 and the center is greater than the distance between the transmission member 11 and the center, the rotational displacement caused by vibration can be amplified at the vibration sensor 14, and then even under the condition of small vibration, a relatively accurate vibration measurement signal can be obtained, and the vibration reduction effect of the household appliance can be improved in an auxiliary manner.
In particular, in the illustrated embodiment, the transmission member 11 and the vibration sensor 14 are located on the same side of the central member 12, the direction of rotation of the vibration sensor 14 being the same as the direction of rotation of the transmission member 11. In other embodiments, the transmission member 11 and the vibration sensor 14 may be located on opposite sides of the central member 12, respectively, with the vibration sensor 14 rotating in a direction opposite to that of the transmission member 11.
It can be understood, among the related art, under the condition that the amplitude when the pendulum moves is undersized, can lead to the measuring signal that vibration sensor can't accurately obtain the vibration to make the pendulum damping effect not good, so, increased the degree of difficulty of carrying out the balance compensation through measuring vibration displacement, greatly influenced domestic appliance's result of use, consequently, can accurately measure vibration displacement in order to guarantee domestic appliance, improve domestic appliance's damping effect, it is necessary to improve domestic appliance's mechanical amplifier. In the embodiment of the present invention, the mechanical amplifier 100 is applied to a home appliance 200 having a vibration body (e.g., a rotating member), such as a washing machine, a dryer, etc.
Referring to fig. 1, in some embodiments, the mechanical amplifier 100 is represented in its entirety by a cross bar and a vertical bar of simple construction, in particular, the transmission member 11 is parallel to the central member 12, and the connecting bar 13 connects the transmission member 11 and the central member 12 perpendicularly. Thus, the transmission member 11 and the central member 12 can act as a vertical rod and the connecting rod 13 as a cross rod. The transmission element 11 and the central element 12 are located on the same side of the vibration sensor 14 with respect to the vibration sensor 14, in the case of operation of the mechanical amplifier 100, the transmission element 11 can push the connecting rod 13 to rotate, the connecting rod 13 rotates around the central element 12 under the push of the transmission element 11, the sensor located at the end of the connecting rod 13 rotates, since the distance between the vibration sensor 14 and the central element 12 is greater than the distance between the transmission element 11 and the central element 12, a lever amplification effect is formed, at this time, the motion amplitude of the joint 133 between the transmission element 11 and the connecting rod 13 is amplified, and the amplified motion amplitude can be detected by the vibration sensor 14. In this way, the mechanical amplifier 100 amplifies the motion amplitude by using the lever principle, so that a smaller motion amplitude is converted into a larger motion amplitude, thereby facilitating obtaining a more accurate measurement result.
In addition, the transmission member 11, the center member 12 and the connecting rod 13 may be made of metal, which has strong properties in rust prevention, corrosion prevention and acid and alkali resistance, compared to other materials such as plastic, etc., which may improve the reliability of the mechanical amplifier 100.
It will be understood that the transmission element 11 and the central element 12 are both parallel to each other, and that the connecting rod 13 connects the transmission element 11 and the central element 12 perpendicularly, along the height direction a-a of the mechanical amplifier 100, that is to say that the angle formed by the transmission element 11 and the connecting rod 13 is right-angled, and likewise the angle formed by the central element 12 and the connecting rod 13 is right-angled. In the figure, the connecting rod 13 is parallel to the horizontal plane, the transmission member 11 is fixedly connected to a vibrating body of the household appliance 200, which requires amplification of the amplitude of motion, and a small amplitude of motion is transmitted to the connecting rod 13 via the transmission member 11, so that the connecting rod 13 can swing around the central member 12, thereby amplifying the amplitude of motion. Therefore, the structure is simple, the structure can be conveniently installed and used, an actuator does not need to be additionally added, and the amplification of the motion amplitude can be realized at low cost.
In addition, referring to fig. 3, in the illustrated embodiment, the transmission member 11 is in a long cylinder shape, and in other embodiments, the transmission member 11 may also be in a rectangular parallelepiped shape, a prism shape, or other shapes, and is not limited herein. In one example, the length L1 of the transmission member 11 can be 85mm, and in other embodiments, the length L1 of the transmission member 11 can be selected from the range of [70, 120] mm or other ranges, and is not limited herein. The diameter of the transmission member 11 is 16mm, in other embodiments the diameter of the transmission member 11 may also be selected in the range of [14.4, 17.6] mm or in other ranges. Similarly, the central member 12 has a long cylindrical shape (i.e., the height of the cylindrical body is greater than the diameter of the cylindrical body), and in other embodiments, the central member 12 may have a rectangular parallelepiped shape, a prismatic shape, a short thick cylindrical shape (i.e., the height of the cylindrical body is less than or equal to the diameter of the cylindrical body), a 90-degree bent member similar to the "7" shape, or other shapes, and the like, and is not limited herein. The length of the centre piece 12 may be smaller than the length of the transmission piece 11 and the diameter of the centre piece 12 may be smaller than the diameter of the transmission piece 11. In one example, the length L2 of the central member 12 may be 72mm, in other embodiments, the length L2 of the central member 12 may be selected from the range of [70, 120] mm or other ranges, the diameter of the central member 12 may be 8mm, in other embodiments, the diameter of the central member 12 may be selected from the range of [6.2, 9.8] mm or other ranges, and is not particularly limited herein. In other embodiments, the length of the central member 12 may be greater than or equal to the length of the transmission member 11, and the diameter of the central member 12 may be greater than or equal to the diameter of the transmission member 11.
In some embodiments, referring to fig. 1 and 2, the connecting rod 13 is fixedly or rotatably connected to the central member 12. In this way, the connecting rod 13 can be rotated about the center 12 with the vibration sensor 14.
Specifically, the connection mode of the connecting rod 13 and the central part 12 may be a rotating connection or a fixed connection. The rotational connection may be fixed connection such as a bearing connection or a sliding ball connection, for example, the rotational connection may be made by metal welding, adhesive bonding, screw connection or snap connection, and is not limited herein. The connecting rod 13 can drive the vibration sensor 14 to swing around the central part 12, so as to amplify the motion amplitude. In the illustrated embodiment, the connecting rod 13 is fixedly connected to the center piece 12.
In the illustrated embodiment, the connecting rod 13 is an elongated cylinder, in other embodiments, the connecting rod 13 may also have a rectangular parallelepiped shape, a prism shape, and the like, please refer to fig. 3, in the illustrated embodiment, the length L3 of the connecting rod 13 may be 150mm, in other embodiments, the length L3 of the connecting rod 13 may also be selected in the range of [100, 200] mm or other ranges, the diameter of the connecting rod 13 may be 18mm, in other embodiments, the diameter of the connecting rod 13 may also be selected in the range of [16.2, 19.8] mm or other ranges, and is not limited herein.
In some embodiments, referring to fig. 1 to 2, the transmission member 11 and the connecting rod 13 can be fixedly connected or separately connected, and the central member 12 is fixedly connected with the connecting rod 13. In this way, the contact between the transmission member 11 and the connecting rod 13 is maintained, so that the transmission member 11 pushes the connecting rod 13 to rotate, and further amplification of the motion amplitude is achieved.
Specifically, the transmission member 11 may be fixed to the vibrating body, the transmission member 11 and the connecting rod 13 may be separately connected, and in the case where the mechanical amplifier 100 operates, the transmission member 11 may push the connecting rod 13 to rotate so as to rotate the connecting rod 13. In the case where it is necessary to separate the transmission member 11 and the connecting rod 13, the transmission member 11 is directly removed without additional disassembling work, which facilitates maintenance of the mechanical amplifier 100 or the vibrating body.
In other embodiments, the driving member 11 and the connecting rod 13 may be fixedly connected, and the fixing manner includes, but is not limited to, welding, bonding, screwing, or snapping.
In addition, the central part 12 is fixedly connected with the connecting rod 13, the connection position of the central part and the connecting rod 13 is a fixed point, and the transmission part 11 pushes the connecting rod 13 to rotate by taking the central part 12 as a center, so that the amplification of the motion amplitude is realized.
In some embodiments, the connecting rod 13 is provided with a through hole (not shown), and the transmission member 11 is movably inserted through the through hole. In this way, a free movement of the transmission element 11 in the longitudinal direction can be ensured. In particular, the transmission member 11 may be clearance-fitted with the through hole, the transmission member 11 being freely movable in the longitudinal direction without driving the connecting rod 13 to rotate about the central member 12. Referring to fig. 1, the longitudinal direction may be parallel to the height direction a-a of the mechanical amplifier 100.
In some embodiments, referring to fig. 1 and 2, the transmission member 11 is configured to drive the connecting rod 13 and the vibration sensor 14 to rotate around the central member 12 in a first direction B, the mechanical amplifier 100 includes an elastic member 15, the elastic member 15 is disposed on the central member 12 and connected to the connecting rod 13, the elastic member 15 is configured to drive the connecting rod 13 to drive the transmission member 11 and the vibration sensor 14 to rotate around the central member 12 in a second direction C, and the first direction B is opposite to the second direction C. So, can guarantee connecting rod 13 in time the return of rotation in-process for connecting rod 13 and driving medium 11 contact all the time.
Specifically, the elastic element 15 may be a torsion spring, a torsion spring or other elastic element, and is not limited herein, in the case of the operation of the mechanical amplifier 100, the transmission element 11 drives the connecting rod 13 to rotate along the first direction B due to the vibration of the vibrating body, at this time, the connecting rod 13 is pushed by the transmission element 11, the vibration sensor 14 on the connecting rod 13 rotates along with a certain angle, under the principle of lever amplification, so that the amplitude motion is amplified, in order to amplify the motion amplitude again effectively, the elastic element 15 is connected to the connecting rod 13, the elastic element 15 may be used to rotate the transmission element 11, the connecting rod 13 and the vibration sensor 14 around the center element 12 in the second direction C, that is, under the elastic force of the elastic element 15, the connecting rod 13 is pulled back to the position of close contact with the transmission element 11 by the elastic element 15, so, guarantee the timely return of connecting rod 13 for connecting rod 13 and driving medium 11 contact all the time, carry out the enlargies of the motion amplitude of next time, obtain comparatively accurate measuring result.
In other embodiments, the elastic member 15 can be connected to other positions, for example, the elastic member 15 is connected to the connecting rod 13, and the connecting rod 13 and the transmission member 11 are always kept in contact by using a pulling force or a pushing force. In other embodiments, other means for returning may be used, such as a pneumatic cylinder, hydraulic cylinder, electric motor, etc.
In some embodiments, the connecting rod 13 includes a first end 131 and a second end 132, the center member 12 is connected to the first end 131, the vibration sensor 14 is disposed at the second end 132, and the connection 133 of the transmission member 11 and the connecting rod 13 is located between the first end 131 and the second end 132. In this manner, the vibration sensor 14 at the second end 132 may effectively measure an amplification of the amplitude motion.
Specifically, the connection 134 of the connecting rod 13 and the center member 12 is located at the first end 131, the second end 132 is the other end away from the first end 131 of the connecting rod 13 along the length direction of the connecting rod 13, the vibration sensor 14 is located at the second end 132, the connecting rod 13 can be driven to rotate together when the transmission member 11 rotates, and the vibration sensor 14 located at the second end 132 can amplify the small amplitude movement of the connection 133 of the transmission member 11 and the connecting rod 13.
Referring to fig. 1, in the illustrated embodiment, the distance H2 from the connection point 133 of the transmission member 11 and the connecting rod 13 to the first end 131 may be 25mm, and in other embodiments, the distance H2 from the connection point 133 of the transmission member 11 and the connecting rod 13 to the first end 131 may be selected from the range of [22.5, 27.5] mm or other ranges, which is not specifically limited herein.
In some embodiments, referring to fig. 1 and 2, the mechanical amplifier 100 includes a base plate 16, a central member 12 coupled to the base plate 16, and the central member 12 rotatably coupled or fixedly coupled to the base plate 16. In this manner, the base plate 16 can fix and support the mechanical amplifier 100, so that the mechanical amplifier 100 can stably amplify the motion amplitude.
Specifically, the base plate 16 may be made of a metal material, and a protrusion 17 is provided on the base plate 16, such as stainless steel, and the central member 12 is coupled to the protrusion 17. This facilitates the attachment and positioning of the centerpiece 12.
The shape of the protrusion 17 is cylindrical, and may also be a circular truncated cone, a rectangular parallelepiped, or a square, and is not particularly limited herein. The protrusions 17 enable the bottom plate 16 to be fixedly or rotatably connected with the central member 12, the bottom plate 16 may be fixedly connected with the central member 12 by welding or bonding, may be fixedly connected with the central member 12 by clipping, buckling or screwing, and may be rotatably connected with the central member 12 by a bearing or a pulley. In this way, the mechanical amplifier 100 can stably amplify the motion amplitude.
In the case where the connecting rod 13 is fixedly connected to the center 12, the center 12 is rotatably connected to the bottom plate 16. In the case of a rotary connection of the connecting rod 13 to the center piece 12, the center piece 12 is fixedly connected to the base plate 16.
Referring to fig. 3, in the illustrated embodiment, the bottom plate 16 is a rectangular parallelepiped, the bottom surface of the bottom plate 16 is square, the length L4 of the side of the bottom surface may be 83mm, in other embodiments, the length L4 of the side of the bottom surface may be selected from the range of [74.7, 91.3] mm or other ranges, the height L5 of the bottom plate 16 is 15.4mm, in other embodiments, the height of the bottom plate 16 may be selected from the range of [13.86, 16.94] mm or other ranges, which is not limited herein. The bottom plate 16 may have other shapes such as a square, a polygonal prism having three or more sides, or a cylinder, and is not particularly limited herein.
In some embodiments, the vibration sensor 14 may include sensors capable of measuring vibrations, such as acceleration sensors, velocity sensors, and displacement sensors. In this way, the kind of the vibration sensor 14 can be flexibly selected.
Specifically, the vibration sensor 14 may be an acceleration sensor, and the acceleration of the movement of the central member 12 is measured by the acceleration sensor, so as to analyze the speed of the mechanical amplifier 100, thereby obtaining the vibration amplitude of the object to be measured.
The vibration sensor 14 may also be a speed sensor, which may be a moving-coil vibration speed sensor, and in the case of vibration of the mechanical amplifier 100, the speed sensor is rigidly connected to the mechanical amplifier 100, and the housing and the permanent magnet of the speed sensor vibrate therewith, while the core, the coil and the damping ring, which are suspended in the speed sensor, do not vibrate therewith due to inertia. Therefore, the coil in the magnetic circuit gap cuts the magnetic line to generate an induced electromotive force proportional to the vibration speed, the output of the coil of the speed sensor is output to the measuring circuit through the lead wire, and the vibration amplitude of the measured object is obtained.
The vibration sensor 14 may also be a displacement sensor, and the vibration itself is a situation where a small displacement occurs on the surface of the object to be measured, but the displacement is usually small and the frequency is high. In the case of measuring the vibration amplitude using the displacement sensor, the vibration amplitude of the mechanical amplifier 100, and thus the vibration amplitude of the vibrating body, can be obtained.
In addition, the vibration sensor 15 may be a combination of two or three of the above three sensors, and the vibration signal of the vibration sensor 15 may be calculated by averaging the vibration signals detected by each sensor or by different weights.
Referring to fig. 4 and 5, an embodiment of the present invention provides a household appliance 200, which includes the mechanical amplifier 100 of any of the above embodiments.
In the above-mentioned household electrical appliance 200, the transmission member 11 can be fixed to the vibrating body, the transmission member 11 drives the connecting rod 13 and the vibration sensor 14 to rotate around the center 12, and since the distance between the vibration sensor 14 and the center is greater than the distance between the transmission member 11 and the center, this can make the rotational displacement caused by the vibration amplified at the vibration sensor 14, and then even under the condition that the vibration is small, also can obtain comparatively accurate vibration measurement signal, and then can promote the vibration reduction effect.
In some embodiments, the household appliance 200 includes a body 21 and a cavity 22, the cavity 22 is rotatably disposed in the body 21, the mechanical amplifier 100 is located outside the body 21, and the transmission member 11 is fixedly connected to the body 21. In this way, the vibration amplitude can be accurately measured by the household appliance 200 through the mechanical amplifier 100, so that a more accurate measurement result can be obtained.
Specifically, in the present embodiment, referring to fig. 4 and 5, the household appliance 200 is described taking a washing machine as an example. The body 21 can be an outer barrel of a washing machine and can be used as a vibrating body, the cavity 22 can be an inner barrel of the washing machine, the upper end of the transmission piece 11 is fixedly connected to the bottom of the outer barrel of the washing machine, the lower end of the transmission piece 11 is always contacted with the connecting rod 13, the connecting rod 13 is fixedly connected with the center piece 12, the center piece 12 is rotatably connected with the bottom plate 16, the elastic piece 15 is arranged on the center piece 12, the vibration sensor 14 is arranged at the far end of the connecting rod 13, the bottom plate 16 can fix the inside of the washing machine and keep the inside of the washing machine still, the mechanical amplifier 100 is supported, under the condition that the inner barrel is eccentric and rotates, the vibration of the inner barrel can be transmitted to the outer barrel, the vibration of the outer barrel drives the transmission piece 11 to move together, the movement of the transmission piece 11 drives the connecting rod 13 to move, the, thereby causing the motion amplitude to be amplified. The function of the elastic element 15 is to ensure the return of the connecting rod 13, so that the transmission element 11 is always in contact with the connecting rod 13. Therefore, the phenomena of weak signals and low signal-to-noise ratio caused by low vibration of the washing machine are avoided, and the signal-to-noise ratio can be improved through the vibration amplifier, so that a more accurate measurement result is obtained.
In the illustrated embodiment, the number of the mechanical amplifiers 100 is two, and the mechanical amplifiers are spaced along the rotation axis of the inner tub, and are respectively used for detecting the amplitude of vibration at both ends of the outer tub. It is understood that in other embodiments, the number of mechanical amplifiers 100 may be 1, or more than 2, and is not limited herein.
Further, the home appliance 200 may also be other home appliances 200 having other vibration bodies. The vibrating body may be moved rotationally as well as translationally, or both. And is not particularly limited herein.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The mechanical amplifier is characterized by comprising a transmission part, a center part, a connecting rod and a vibration sensor, wherein the vibration sensor is arranged on the connecting rod, the connecting rod is connected with the transmission part and the center part, the transmission part is configured to drive the connecting rod and the vibration sensor to rotate by taking the center part as a center, and the distance between the vibration sensor and the center part is greater than the distance between the transmission part and the center part.
2. Mechanical amplifier according to claim 1, wherein the transmission member is parallel to the central member and the connecting rod connects the transmission member and the central member perpendicularly.
3. Mechanical amplifier according to claim 1, wherein the connecting rod is fixedly or rotatably connected to the central member.
4. Mechanical amplifier according to claim 1, wherein the transmission member is fixedly or detachably connected to the connecting rod, and the central member is fixedly connected to the connecting rod.
5. The mechanical amplifier of claim 1, wherein the transmission member is configured to drive the connecting rod and the vibration sensor to rotate in a first direction around the center member, the mechanical amplifier includes an elastic member disposed on the center member and connected to the connecting rod, the elastic member is configured to drive the connecting rod to drive the transmission member and the vibration sensor to rotate in a second direction around the center member, and the first direction is opposite to the second direction.
6. Mechanical amplifier according to claim 1, comprising a base plate, wherein the center piece is connected to the base plate, wherein the center piece is fixedly or rotatably connected to the base plate.
7. The mechanical amplifier of claim 1, wherein the vibration sensor comprises at least one of an acceleration sensor, a velocity sensor, and a displacement sensor.
8. The mechanical amplifier of claim 1, wherein the connecting rod defines a through hole, and the transmission member movably penetrates the through hole.
9. An electric household appliance comprising a mechanical amplifier according to any one of claims 1 to 8.
10. The household appliance according to claim 9, wherein the household appliance comprises a body and a cavity, the cavity is rotatably arranged in the body, the mechanical amplifier is positioned outside the body, and the transmission member is fixedly connected with the body.
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| CN201911346611.0A CN113029325A (en) | 2019-12-24 | 2019-12-24 | Mechanical amplifier and household appliance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911346611.0A CN113029325A (en) | 2019-12-24 | 2019-12-24 | Mechanical amplifier and household appliance |
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| CN113029325A true CN113029325A (en) | 2021-06-25 |
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| CN201911346611.0A Pending CN113029325A (en) | 2019-12-24 | 2019-12-24 | Mechanical amplifier and household appliance |
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Cited By (1)
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| CN115574929A (en) * | 2022-10-09 | 2023-01-06 | 正泰集团研发中心(上海)有限公司 | Method and device for detecting vibration of electric appliance, electronic equipment and storage medium |
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