CN113323989B - Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method - Google Patents

Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method Download PDF

Info

Publication number
CN113323989B
CN113323989B CN202110573344.1A CN202110573344A CN113323989B CN 113323989 B CN113323989 B CN 113323989B CN 202110573344 A CN202110573344 A CN 202110573344A CN 113323989 B CN113323989 B CN 113323989B
Authority
CN
China
Prior art keywords
vibration
tiller
electromagnet
controller
electromagnets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110573344.1A
Other languages
Chinese (zh)
Other versions
CN113323989A (en
Inventor
尹宜勇
刘欢
朱文佳
齐林山
李�浩
张伯伦
丁雨焘
王通
王国强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Agricultural University
Original Assignee
China Agricultural University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Agricultural University filed Critical China Agricultural University
Priority to CN202110573344.1A priority Critical patent/CN113323989B/en
Publication of CN113323989A publication Critical patent/CN113323989A/en
Application granted granted Critical
Publication of CN113323989B publication Critical patent/CN113323989B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
    • F16F15/035—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means by use of eddy or induced-current damping
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2222/00—Special physical effects, e.g. nature of damping effects
    • F16F2222/06—Magnetic or electromagnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/08—Sensor arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/18—Control arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention discloses a handrail frame vibration damping device of an electric mini-tiller and an electromagnetic damping automatic optimization method. According to the invention, the optimal electromagnetic damping can be automatically optimized according to different working conditions during the cultivation of the electric micro-cultivator, so that the problem of higher vibration intensity of the handrail frame caused by the cultivation of the electric micro-cultivator is solved; meanwhile, eddy current in the metal ring can be converted into electric energy to charge the controller, so that energy is saved, the utilization rate of vibration energy is improved, and the vibration reduction effect is more remarkable.

Description

Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method
Technical Field
The invention belongs to the field of vibration control, and particularly relates to a vibration damper of an electric mini-tiller armrest frame and an electromagnetic damping automatic optimization method.
Background
The area of hilly and mountainous areas in China accounts for more than 2/3 of the total area of cultivated land in China, the land is narrow, scattered, lack of machine-ploughing channels, and inconvenient in mechanical transfer, and is not suitable for large and medium-sized agricultural machinery operation. The electric mini-tiller can freely run in the field due to small volume, light weight and simple structure, overcomes the defect that large-scale agricultural machinery cannot enter a mountain field, and becomes an indispensable tillage machine in hilly and mountainous areas. In the working process of the electric mini-tiller, the rotary tillage cutter can vibrate when cutting soil, the rotary tillage cutter can strongly vibrate the handrail frame through the transmission of structures such as the rack and the like, and finally the strong vibration acts on hands of people, so that the operation comfort of the electric mini-tiller is influenced, and different degrees of body damage can be caused to operators, and therefore, the vibration reduction research on the handrail frame of the electric mini-tiller is very necessary.
In summary, how to automatically optimize the optimal electromagnetic damping according to different working conditions during the cultivation of the electric mini-tiller so as to solve the problem that the vibration strength of the armrest frame is high during the cultivation of the electric mini-tiller becomes a problem to be solved urgently.
Disclosure of Invention
In order to overcome a series of defects in the prior art, the invention aims to provide a handrail frame vibration damping device of an electric mini-tiller, which is characterized by comprising an electromagnetic dynamic vibration absorber 3, an acceleration sensor 8 and a controller 9, wherein the acceleration sensor 8 collects vibration acceleration amplitude signals of a handrail frame 10 and transmits the vibration acceleration amplitude signals to the controller 9, and the controller 9 is matched with the electromagnetic dynamic vibration absorber 3 to gradually change electromagnetic damping of the electromagnetic dynamic vibration absorber 3 and finally realize automatic optimization of the electromagnetic damping.
Preferably, the electromagnetic dynamic vibration absorber 3 comprises a circular ring column 301, a sleeve 302, a metal circular ring 303, an electromagnet 304, a spring rod 305; the two ends of the inside of the electromagnetic dynamic vibration absorber 3 are respectively provided with a circular column 301, the two ends of a spring bar 305 are respectively arranged in the inner rings of the two circular columns 301, the spring bar 305 is fixedly provided with two electromagnets 304, the metal circular ring 303 is clamped between the two sleeves 302, and the magnetic induction intensity of the electromagnets 304 is adjusted through a controller 9.
Preferably, a gap is reserved between the two electromagnets 304, so that the metal ring 303 is located at the middle of the gap between the two electromagnets 304, and it is ensured that the electromagnets 304 do not collide with the metal ring 303 in the process of performing radial reciprocating vibration.
Preferably, the magnetic pole directions of the two electromagnets 304 are axial, and the magnetic pole installation directions of the two electromagnets are the same or opposite, that is, the magnetic poles on the left and right sides of the gap between the two electromagnets 304 are N-N or N-S or S-N or S-S.
Preferably, the inner diameter of the metal ring 303 is larger than the diameter of the spring rod 305, so that a gap is maintained between the metal ring 303 and the spring rod 305, and the metal ring 303 does not collide with the spring rod 305 in the radial reciprocating vibration process of the spring rod 305.
Preferably, the outer diameter of the electromagnet 304 is smaller than the inner diameter of the sleeve 302, so that a gap is kept between the electromagnet 304 and the sleeve 302, and the electromagnet 304 does not collide with the sleeve 302 during the radial reciprocating vibration of the electromagnet 304.
Preferably, the working energy of the electromagnet 304 is derived from a power supply of the electric mini-tiller; the working energy of the controller 9 and the acceleration sensor 8 is derived from eddy current generated when the metal ring 303 cuts the magnetic field.
Preferably, vibration damper still includes hand (hold) 1 and threaded end cover 5, hand (hold) 1 links to each other with handrail frame 10, and acceleration sensor 8 and controller 9 are close to the installation of hand (hold) 1 department, and the parcel of the 1 outside of hand (hold) has rubber 2, and the 1 inside cylinder cavity 6 that is equipped with of hand (hold), baffle 7 has been placed to the leftmost end of cylinder cavity 6, and the rightmost end of cylinder cavity 6 is equipped with internal thread hole 4, and electromagnetic dynamic vibration absorber 3 passes through threaded end cover 5 locking and installs in cylinder cavity 6.
Preferably, the rubber 2 has good heat insulation performance, and the rubber 2 is a rubber-based composite material prepared by taking aramid fibers as raw materials.
The invention also aims to provide an electromagnetic damping automatic optimization method of the vibration damper of the handrail frame of the electric mini-tiller, which is characterized by comprising the following steps of:
step 1, starting the electric mini-tiller to enable the mini-tiller to be in a tilling state, wherein the electromagnet 304 is in a direct connection state, the handle 1 starts to vibrate, the metal ring 303 cuts magnetic induction lines in a magnetic field due to vibration to generate eddy current, and then part of the eddy current is converted into electric energy to supply power and charge the controller 9 and the acceleration sensor 8;
step 2, the controller 9 controls the coil current of the electromagnet 304 to change step by step with time according to a preset value, and the magnetic induction intensity generated by the electromagnet 304 changes step by step with the coil current, so that the eddy current generated in the metal ring 303 which performs cutting motion in a magnetic field changes, and the electromagnetic damping of the electromagnetic dynamic vibration absorber 3 is further changed;
step 3, the acceleration sensor 8 collects the vibration amplitude of the handle 1 once every 1ms and transmits the collected signal to the controller 9;
and 4, after the controller 9 controls the electromagnet 304 to complete sweeping in the whole current section according to a preset value, comparing all received vibration amplitude signals, selecting the current corresponding to the minimum vibration amplitude signal from the vibration amplitude signals, controlling the electromagnet 304 to maintain the current to work, realizing automatic optimization of electromagnetic damping, and further optimizing the vibration reduction effect of the handle 1.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a vibration damper of a handrail frame of an electric mini-tiller and an automatic electromagnetic damping optimizing method, which can automatically optimize optimal electromagnetic damping according to different working conditions during tillage of the electric mini-tiller so as to solve the problem of higher vibration intensity of the handrail frame caused by tillage of the electric mini-tiller. Meanwhile, eddy current in the metal ring can be converted into electric energy to charge the controller, so that energy is saved, the utilization rate of vibration energy is improved, and the vibration reduction effect is more remarkable.
Drawings
Fig. 1 is an overall sectional view of the present invention.
Fig. 2 is a cross-sectional view of the electromagnetic dynamic vibration absorber of the present invention.
The reference numbers in the figures are:
1-a handle, 2-rubber, 3-an electromagnetic dynamic vibration absorber, 4-an internal threaded hole, 5-a threaded end cover, 6-a cylindrical cavity, 7-a baffle, 8-an acceleration sensor, 9-a controller and 10-a handrail frame;
301-circular column, 302-sleeve, 303-metal circular ring, 304-electromagnet, 305-spring rod.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiments and the directional terms described below with reference to the drawings are exemplary and intended to be used in the explanation of the invention, and should not be construed as limiting the invention.
In one wide embodiment of the invention, the vibration damping device for the handrail frame of the electric mini-tiller is characterized by comprising an electromagnetic dynamic vibration absorber 3, an acceleration sensor 8 and a controller 9, wherein the acceleration sensor 8 is used for collecting vibration acceleration amplitude signals of the handrail frame 10 and transmitting the vibration acceleration amplitude signals to the controller 9, and the controller 9 is matched with the electromagnetic dynamic vibration absorber 3 to gradually change electromagnetic damping of the electromagnetic dynamic vibration absorber 3 and finally realize automatic optimization of the electromagnetic damping.
Preferably, the electromagnetic dynamic vibration absorber 3 comprises a circular ring column 301, a sleeve 302, a metal circular ring 303, an electromagnet 304, a spring bar 305; the two ends of the inside of the electromagnetic dynamic vibration absorber 3 are respectively provided with a circular column 301, the two ends of a spring rod 305 are respectively arranged in the inner rings of the two circular columns 301, two electromagnets 304 are fixedly arranged on the spring rod 305, a metal circular ring 303 is clamped between the two sleeves 302, and the magnetic induction intensity of the electromagnets 304 is adjusted through a controller 9.
Preferably, a gap is reserved between the two electromagnets 304, so that the metal ring 303 is located at the middle of the gap between the two electromagnets 304, and it is ensured that the electromagnets 304 do not collide with the metal ring 303 in the process of performing radial reciprocating vibration.
Preferably, the magnetic pole directions of the two electromagnets 304 are axial, and the magnetic pole installation directions of the two electromagnets are the same or opposite, that is, the magnetic poles on the left and right sides of the gap between the two electromagnets 304 are N-N or N-S or S-N or S-S.
Preferably, the inner diameter of the metal ring 303 is larger than the diameter of the spring rod 305, so that a gap is maintained between the metal ring 303 and the spring rod 305, and the metal ring 303 does not collide with the spring rod 305 in the radial reciprocating vibration process of the spring rod 305.
Preferably, the outer diameter of the electromagnet 304 is smaller than the inner diameter of the sleeve 302, so that a certain gap is kept between the electromagnet 304 and the sleeve 302, and the electromagnet 304 does not collide with the sleeve 302 during the radial reciprocating vibration of the electromagnet 304.
Preferably, the working energy of the electromagnet 304 is derived from a power supply of the electric mini-tiller; the working energy of the controller 9 and the acceleration sensor 8 is derived from eddy current generated when the metal ring 303 cuts the magnetic field.
Preferably, vibration damper still includes hand (hold) 1 and threaded end cover 5, hand (hold) 1 links to each other with handrail frame 10, and acceleration sensor 8 and controller 9 are close to the installation of hand (hold) 1 department, and the parcel of the 1 outside of hand (hold) has rubber 2, and the 1 inside cylinder cavity 6 that is equipped with of hand (hold), baffle 7 has been placed to the leftmost end of cylinder cavity 6, and the rightmost end of cylinder cavity 6 is equipped with internal thread hole 4, and electromagnetic dynamic vibration absorber 3 passes through threaded end cover 5 locking and installs in cylinder cavity 6.
Preferably, the rubber 2 has good heat insulation performance, and the rubber 2 is a rubber-based composite material prepared by taking aramid fibers as raw materials.
The invention also aims to provide an electromagnetic damping automatic optimization method of the vibration damper of the handrail frame of the electric mini-tiller, which is characterized by comprising the following steps of:
step 1, starting the electric mini-tiller to enable the mini-tiller to be in a tilling state, enabling the electromagnet 304 to be in a direct connection state at the moment, starting vibration of the handle 1, enabling the metal ring 303 to cut magnetic induction lines in a magnetic field due to vibration to generate eddy current, and then converting part of the eddy current into electric energy to supply power and charge the controller 9 and the acceleration sensor 8;
step 2, the controller 9 controls the coil current of the electromagnet 304 to change step by step along with time according to a preset value, and the magnetic induction intensity generated by the electromagnet 304 changes step by step along with the change, so that the eddy current generated in the metal ring 303 performing cutting motion in a magnetic field changes, and the electromagnetic damping of the electromagnetic dynamic vibration absorber 3 is further changed;
step 3, the acceleration sensor 8 collects the vibration amplitude of the handle 1 once every 1ms and transmits the collected signal to the controller 9;
and 4, after the controller 9 controls the electromagnet 304 to complete sweeping in the whole current section according to a preset value, comparing all received vibration amplitude signals, selecting the current corresponding to the minimum vibration amplitude signal from the vibration amplitude signals, controlling the electromagnet 304 to maintain the current to work, realizing automatic optimization of electromagnetic damping, and further optimizing the vibration reduction effect of the handle 1.
The present invention will be described in further detail below with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention.
The handrail frame vibration damper of the electric mini-tiller shown in the figure 1 comprises a handle 1, rubber 2, an electromagnetic dynamic vibration absorber 3, an internal threaded hole 4, a threaded end cover 5, a cylindrical cavity 6, a baffle 7, an acceleration sensor 8, a controller 9 and a handrail frame 10;
the handle 1 is connected with the armrest frame 10, an acceleration sensor 8 and a controller 9 are installed at a position close to the handle 1, rubber 2 wraps the outer side of the handle 1, a cylindrical cavity 6 is formed in the handle 1, a baffle 7 is placed at the leftmost end of the cylindrical cavity 6, an internal threaded hole 4 is formed in the rightmost end of the cylindrical cavity 6, and the electromagnetic dynamic vibration absorber 3 is installed in the cylindrical cavity 6 in a locking mode through a threaded end cover 5;
the electromagnetic dynamic vibration absorber 3 comprises a circular ring column 301, a sleeve 302, a metal circular ring 303, an electromagnet 304 and a spring rod 305; two ends of the inside of the electromagnetic dynamic vibration absorber 3 are respectively provided with a circular column 301, two ends of a spring rod 305 are respectively arranged in inner rings of the two circular columns 301, two electromagnets 304 are fixedly arranged on the spring rod 305, and a metal circular ring 303 is clamped between two sleeves 302.
A certain gap is required to be reserved between the two electromagnets 304, so that the metal ring 303 is positioned in the middle of the gap between the two electromagnets 304, and the electromagnets 304 do not collide with the metal ring 303 in the process of performing radial reciprocating vibration.
The magnetic pole directions of the two electromagnets 304 are axial, the magnetic pole installation directions of the two electromagnets can be the same or opposite, that is, the magnetic poles on the left and right sides of the gap between the two electromagnets 304 can be any one of N-N, N-S, S-N and S-S.
The inner diameter of the metal ring 303 is larger than the diameter of the spring rod 305, so that a certain gap is kept between the metal ring 303 and the spring rod 305, and the metal ring 303 is prevented from colliding with the spring rod 305 in the process of the radial reciprocating vibration of the spring rod 305.
The outer diameter of the electromagnet 304 is smaller than the inner diameter of the sleeve 302, so that a certain gap is kept between the electromagnet 304 and the sleeve 302, and the electromagnet 304 is ensured not to collide with the sleeve 302 in the process of radial reciprocating vibration of the electromagnet 304.
The magnetic induction intensity of the electromagnet 304 can be adjusted by the controller 9.
The acceleration sensor 8 can transmit the collected vibration acceleration amplitude signal to the controller 9.
The working energy of the electromagnet 304 is from the power supply of the electric mini-tiller. The working energy of the controller 9 and the acceleration sensor 8 is derived from eddy current generated when the metal ring 303 cuts the magnetic field.
The rubber 2 has good heat insulation performance, and particularly, the rubber 2 comprises a rubber-based composite material prepared from aramid fibers serving as a raw material, and the rubber material is not limited.
An electromagnetic damping automatic optimization method for a vibration damper of an armrest frame of an electric mini-tiller comprises the following steps:
step 1, starting the electric mini-tiller to enable the mini-tiller to be in a tilling state, enabling the electromagnet 304 to be in a direct connection state at the moment, starting vibration of the handle 1, enabling the metal ring 303 to cut magnetic induction lines in a magnetic field due to vibration to generate eddy current, and then converting part of the eddy current into electric energy to supply power and charge the controller 9 and the acceleration sensor 8;
step 2, the controller 9 controls the coil current of the electromagnet 304 to gradually change along with time according to a preset value, and the magnetic induction intensity generated by the electromagnet 304 also gradually changes, so that the eddy current generated in the metal ring 303 performing cutting motion in the magnetic field changes, and the electromagnetic damping of the electromagnetic dynamic vibration absorber 3 is further changed;
and 3, the acceleration sensor 8 collects the vibration amplitude of the handlebar 1 every 1ms and transmits the collected signals to the controller 9.
And 4, after the controller 9 controls the electromagnet 304 to complete sweeping in the whole current section according to a preset value, comparing all received vibration amplitude signals, selecting the current corresponding to the minimum vibration amplitude signal from the vibration amplitude signals, controlling the electromagnet 304 to maintain the current to work, realizing automatic optimization of electromagnetic damping, and further optimizing the vibration reduction effect of the handle 1.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. The handrail frame vibration damping device of the electric mini-tiller is characterized by comprising an electromagnetic dynamic vibration absorber (3), an acceleration sensor (8) and a controller (9), wherein the acceleration sensor (8) collects vibration acceleration amplitude signals of a handrail frame (10) and transmits the vibration acceleration amplitude signals to the controller (9), and the controller (9) is matched with the electromagnetic dynamic vibration absorber (3) to gradually change electromagnetic damping of the electromagnetic dynamic vibration absorber (3) and finally realize automatic optimization of the electromagnetic damping;
the electromagnetic dynamic vibration absorber (3) comprises a circular ring column (301), a sleeve (302), a metal circular ring (303), an electromagnet (304) and a spring rod (305); the two ends of the inside of the electromagnetic dynamic vibration absorber (3) are respectively provided with a circular column (301), the two ends of a spring rod (305) are respectively arranged in the inner rings of the two circular columns (301), the spring rod (305) is fixedly provided with two electromagnets (304), a metal circular ring (303) is clamped between two sleeves (302), and the magnetic induction intensity of the electromagnets (304) is adjusted through a controller (9);
a gap is required to be reserved between the two electromagnets (304), so that the metal circular ring (303) is positioned in the middle of the gap between the two electromagnets (304), and the metal circular ring (303) is prevented from colliding in the radial reciprocating vibration process of the electromagnets (304).
2. The vibration damper of the handrail frame of the electric mini-tiller according to claim 1, wherein the magnetic poles of the two electromagnets (304) are in axial directions, and the installation directions of the magnetic poles of the two electromagnets are in the same direction or in opposite directions, namely, the magnetic poles on the left side and the right side of the gap between the two electromagnets (304) are N-N or N-S or S-N or S-S.
3. The electric mini-tiller handrail frame damping device as claimed in claim 1, wherein the inner diameter of the metal ring (303) is larger than the diameter of the spring rod (305) so that a gap is kept between the metal ring and the spring rod (305) to ensure that the metal ring (303) does not collide with the spring rod (305) during the radial reciprocating vibration of the spring rod (305).
4. The vibration damper of the armrest frame of the electric mini-tiller according to claim 1, wherein the outer diameter of the electromagnet (304) is smaller than the inner diameter of the sleeve (302) so that a gap is kept between the electromagnet (304) and the sleeve (302) to ensure that the electromagnet (304) does not collide with the sleeve (302) in the radial reciprocating vibration process of the electromagnet (304).
5. The vibration damper of the armrest frame of the electric mini-tiller according to claim 1, wherein working energy of the electromagnet (304) is derived from a power supply of the electric mini-tiller; the working energy of the controller (9) and the acceleration sensor (8) is derived from eddy current generated by the metal circular ring (303) when the magnetic field is cut.
6. The electric mini tiller handrail frame vibration damper according to claim 1, characterized in that the vibration damper further comprises a handle (1) and a threaded end cover (5), the handle (1) is connected with the handrail frame (10), an acceleration sensor (8) and a controller (9) are mounted near the handle (1), rubber (2) wraps the outer side of the handle (1), a cylindrical cavity (6) is arranged inside the handle (1), a baffle (7) is placed at the leftmost end of the cylindrical cavity (6), an internal threaded hole (4) is formed in the rightmost end of the cylindrical cavity (6), and an electromagnetic power vibration absorber (3) is locked and mounted in the cylindrical cavity (6) through the threaded end cover (5).
7. The vibration damper of the armrest frame of the electric mini-tiller according to claim 6, wherein the rubber (2) has good heat insulation performance, and the rubber (2) is a rubber-based composite material prepared from aramid fibers.
8. The automatic electromagnetic damping optimizing method for the vibration damper of the armrest frame of the electric mini-tiller according to any one of claims 1-7, characterized by comprising the following steps:
step 1, starting the electric mini-tiller to enable the mini-tiller to be in a tilling state, enabling an electromagnet (304) to be in a direct connection state at the moment, starting vibration of a handle (1), cutting magnetic induction lines in a magnetic field to generate eddy current due to vibration of a metal ring (303), and converting part of the eddy current into electric energy to supply power and charge the controller (9) and an acceleration sensor (8);
step 2, the controller (9) controls the coil current of the electromagnet (304) to change step by step along with time according to a preset value, and the magnetic induction intensity generated by the electromagnet (304) changes step by step along with the change of the coil current, so that the eddy current generated in the metal ring (303) which performs cutting motion in a magnetic field changes, and the electromagnetic damping of the electromagnetic dynamic vibration absorber (3) is changed;
step 3, the acceleration sensor (8) collects the vibration amplitude of the handlebar (1) once every 1ms and transmits a collected signal to the controller (9);
and 4, after the controller (9) controls the electromagnet (304) to complete sweeping in the whole current section according to a preset value, comparing all received vibration amplitude signals, selecting the current corresponding to the minimum vibration amplitude signal, controlling the electromagnet (304) to maintain the current to work, realizing automatic optimization of electromagnetic damping, and further enabling the vibration reduction effect of the handle (1) to be optimal.
CN202110573344.1A 2021-05-25 2021-05-25 Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method Active CN113323989B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110573344.1A CN113323989B (en) 2021-05-25 2021-05-25 Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110573344.1A CN113323989B (en) 2021-05-25 2021-05-25 Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method

Publications (2)

Publication Number Publication Date
CN113323989A CN113323989A (en) 2021-08-31
CN113323989B true CN113323989B (en) 2022-08-30

Family

ID=77416771

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110573344.1A Active CN113323989B (en) 2021-05-25 2021-05-25 Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method

Country Status (1)

Country Link
CN (1) CN113323989B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114932241B (en) * 2022-06-07 2023-06-09 哈尔滨理工大学 Vibration reduction boring bar based on eddy current damping and control method thereof
CN115614432B (en) * 2022-10-14 2024-04-16 中国农业大学 Vibration isolation and vibration reduction composite structure self-adaptive mini-tiller armrest frame

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5056514B2 (en) * 2008-03-18 2012-10-24 セイコーエプソン株式会社 Impact relaxation device
CN102582207A (en) * 2012-03-02 2012-07-18 中国航空工业集团公司北京航空材料研究院 Preparation method for hybrid natural fiber laminate
CN107355509B (en) * 2017-08-10 2019-07-30 东南大学 A kind of current vortex vibration absorber using lever principle
CN107339352B (en) * 2017-08-21 2019-08-06 哈尔滨工程大学 A kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller
CN208134000U (en) * 2018-05-15 2018-11-23 山东大学 A kind of adjustable energy feedback type vehicle active suspension electromagnetic vibration control device of damping
CN108716521B (en) * 2018-06-01 2020-08-25 中国人民解放军海军工程大学 Vibration energy collecting device based on nonlinear energy trap
CN212957068U (en) * 2020-06-30 2021-04-13 中铁西北科学研究院有限公司 Electromagnetic combined nonlinear eddy current TMD vibration damping device

Also Published As

Publication number Publication date
CN113323989A (en) 2021-08-31

Similar Documents

Publication Publication Date Title
CN113323989B (en) Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method
CN101841224B (en) Cylindrical-turnplate permanent magnet speed controller
CN203608577U (en) Small berry picker with adjustable vibrating parameters
CN203457027U (en) Centrifugal-type magnetic drive device
CN101783576A (en) Permanent-magnet speed governor
CN111043210A (en) Shrink-ring type eddy current tuned mass damper
CN106112021A (en) Ultrasound wave automatic tool changing electrical spindle
CN209408531U (en) Highly integrated robot doublejointed unit and legged type robot and cooperation mechanical arm
CN104824873B (en) A kind of fluctuation-type ventilation and protection clothes
CN104917303A (en) Power taking device and unmanned helicopter with the same
CN214612963U (en) Yarn tensioner
CN213775529U (en) Gasoline engine generator with high damping performance
CN201860245U (en) Cylindrical rotary table permanent magnet speed governor
CN110129989A (en) It is interrupted elastic force circle rope braider and weaving method
CN204810058U (en) High efficiency electric ship propeller
CN204708031U (en) A kind of fluctuation-type ventilation and protection clothes
CN217761984U (en) Inner gear ring of walking speed reducer of paver
CN201656743U (en) Permanent magnet speed regulator
CN205884509U (en) Novel agricultural remote control weeds device
CN210142506U (en) Noise reduction device for chemical production workshop
CN107606037B (en) Magnetorheological damper capable of improving damping force and failure safety
CN203293141U (en) Damping handle of power device
CN205081664U (en) Magnetism is to magnetism permanent magnetism synchronous coupling
CN211456831U (en) High-speed motor rotor and high-speed motor
CN206605505U (en) A kind of portable robot

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant