CN209638301U - A kind of agricultural machinery damping device based on magnetorheological fluid - Google Patents
A kind of agricultural machinery damping device based on magnetorheological fluid Download PDFInfo
- Publication number
- CN209638301U CN209638301U CN201920274529.0U CN201920274529U CN209638301U CN 209638301 U CN209638301 U CN 209638301U CN 201920274529 U CN201920274529 U CN 201920274529U CN 209638301 U CN209638301 U CN 209638301U
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- piston
- spring
- cylinder body
- magnetorheological fluid
- agricultural machinery
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- 238000013016 damping Methods 0.000 title claims abstract description 41
- 239000012530 fluid Substances 0.000 title claims abstract description 32
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 206010044565 Tremor Diseases 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 230000005674 electromagnetic induction Effects 0.000 abstract description 6
- 230000035939 shock Effects 0.000 description 6
- 230000000116 mitigating effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Fluid-Damping Devices (AREA)
Abstract
A kind of agricultural machinery damping device based on magnetorheological fluid, including sleeved cylinder body is arranged, the bottom plate being coupled is sealed with cylinder body, the piston shaft and the piston plate being rotatably connected in cylinder body and with piston shaft that the mode of being threadedly coupled is threaded through in sleeve, magnetorheological fluid and first coil and the second coil are provided between piston plate and bottom plate, through-hole and the displacement sensor for controlling two coils are provided on piston plate, piston shaft upper end is provided with for transmitting the Supporting cover shaken and for the third spring of damping, cylinder interior top is provided with first support bar and is arranged with the first spring for damping, it is provided with the second support column on bottom plate and is arranged with the second spring for damping；The utility model is changed by electromagnetic induction repulsion between thread friction power between the elastic force of springs at different levels, piston shaft and sleeve, two coils and magnetorheological fluid state generates resistance vibration-inhibition, many kinds of force be combined with each other, collective effect makes agricultural machinery smooth working.
Description
Technical field
The utility model relates to the field of shock absorption of agricultural machinery, and in particular to a kind of agricultural machinery use based on magnetorheological fluid
Damping device.
Background technique
With the progress of modern science and technology, the machine-building level and level of processing in China have obtained quick development, therewith
And come be agricultural machinery fast development, however at present used in agricultural machinery, such as transplanter and combine harvester, chassis
Usually more stiff with the shock mitigation system of vehicle frame, damping effect is bad on the farmland edge of a field and rugged road surface, and agricultural machinery exists
What is generated when driving jolts than more serious, can not only reduce the comfort level of driver and passenger, but will influence driving safety, and acutely
Vibration to it is mechanical itself intensity and performance also have biggish damage, influence operation quality；Existing shock mitigation system is in damping
The too big or too small amplitude disadvantage of existing damping rate in the process, when damping rate is too big, so that the jump up and down of damping object
It is dynamic acutely to influence normal operation, when damping rate is too small, is not enough to reach damping effect and makes shock mitigation system stiff, comfort level
It is not improved, therefore is badly in need of a kind of effective shock mitigation system to solve such problems.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of agricultural machinery damping device based on magnetorheological fluid, it can
Effectively slow down farm machinery jolting in use, so that farm machinery is more smoothly moved, improve agricultural machinery
Stability and working efficiency.
The technical solution of the utility model is: a kind of agricultural machinery damping device based on magnetorheological fluid, including bottom end
For sleeved cylinder body is set among opening and top, is coupled for the sealing with cylinder body bottom plate, the side of being threadedly coupled
It piston shaft that formula is threaded through in sleeve and is rotatably connected with piston shaft and with the piston plate that piston shaft moves up and down,
The upper end of the piston shaft reaches except cylinder body from sleeve, and lower end is deep into cylinder body from sleeve, the piston
Disk is located in cylinder body, and the periphery of piston plate is coupled with inboard wall of cylinder block sealing, and the cylinder interior is located at piston plate and bottom
Magnetorheological fluid is provided between plate, the top of cylinder interior extends downward with first support bar, is arranged in first support bar
There is the first spring shaken upwards for damper piston disk, is upwardly extended on bottom plate and be provided with the second support column, the second support column
On be arranged with the second spring shaken downwards for damper piston disk, the part that the piston shaft is pierced by sleeve upper end can be rotated
It is provided with the Supporting cover that vibration is transmitted for connecting agricultural machinery, Supporting cover is moved up and down with piston shaft, in piston shaft
Part between Supporting cover and sleeve is arranged with the third spring for damping, is located at below piston plate in piston shaft
Lower end is provided with first coil, and first coil is corresponded on bottom plate and is provided with the second coil, is arranged on the piston plate useful
Change in the through-hole of magnetorheological fluid circulation and for measuring the distance between piston plate and bottom plate to control first coil and second
The displacement sensor of size of current in coil.
Further, it is rectangular external screw thread that external screw thread in sleeve is threaded through in the piston shaft, right on hub internal bore
The rectangular external screw thread in piston shaft is answered to be provided with flat thread slot.
Further, the rectangular external screw thread is subsection setup.
Further, the first support bar is two and is uniformly arranged on the intracorporal top of cylinder around the central axis of cylinder body
End.
Further, the second support bar is six and is uniformly arranged on bottom plate around the central axis of cylinder body.
Further, first spring and second spring are fixedly connected with the shake up and down with damper piston disk with piston plate
It is dynamic.
Further, be provided with the baffle for tension and compression third spring between the Supporting cover and third spring, baffle with
The rotation connection of piston shaft, baffle are moved up and down with piston shaft, and the upper end of third spring is fixedly connected with baffle, third spring
Lower end be fixedly connected with sleeve.
Further, third support rod, the lower end fixed setting of third support rod are provided with below second coil
On bottom plate.
Further, flange is provided with outside the open end of the cylinder body, flange is mutually solid using the first fastener with bottom plate
Fixed connection.
Further, the cylinder body, bottom plate, piston shaft, piston plate, first support bar, second support bar, third support
Bar, the first spring, second spring, first coil, the second coil and displacement sensor are all made of anti-corrosion material.
After adopting the above technical scheme, the utility model has the following beneficial effects:
1, spring is provided with three ranks in the utility model, and spring damping is progressive, can be to significantly shaking
Effectively slowed down, the coefficient of elasticity of third spring makes less than the first spring and second spring by the comfortable of third spring
More vibration is passed into the first spring and second spring after buffering, realizes the gentle comfortable of damping；
2, between piston shaft and sleeve flat thread connection can generate biggish thread friction power with slow down vibration,
Rectangular external screw thread in piston shaft is set as segmental structure, and can guarantee piston shaft in the course of rotation becomes more to put down
Surely；
3, first coil and the second coil are arranged in the magnetorheological fluid below piston plate, can make in shock absorbing process
Magnetorheological fluid after state change generates crush resistance to the entire end face of piston plate, improves cushioning ability, and damping effect increases
Add；
4, displacement sensor is set on piston plate, and displacement sensor is displaced positive and negative variation by detection piston plate, with control
Size of current and direction in first coil and the second coil, and then change magnetic field size, to change electromagnetic induction repulsion and magnetic
Power damping all over the fields；According to the use demand under varying environment in practice, corresponding electric current under same displacement variation can adjust
Size keeps damping caused by the lower electromagnetic induction repulsion and magnetorheological fluid generated of same displacement variation different, to improve different rings
Damping effect under border；
5, the utility model utilizes the thread friction power between the elastic force of springs at different levels, piston shaft and sleeve, First Line
Electromagnetic induction repulsion and magnetorheological fluid state between circle and the second coil, which change, generates resistance vibration-inhibition, and many kinds of force is mutually tied
Close, collective effect, can forcefully damping vibration, enable agricultural machinery more smooth working to improve working efficiency, and
The comfort level of driver and passenger is improved, drive safety is increased.
Detailed description of the invention
Fig. 1 is the main view cut-away illustration of the utility model structure；
Fig. 2 is the side view cut-away illustration of the utility model structure；
Marked in the figure: 1, Supporting cover, the 2, first nut, the 3, first tapered roller bearing, the 4, second nut, the 5, second circular cone
Roller bearing, 6, baffle, 7, third spring, 8, flat thread slot, 9, rectangular external screw thread, 10, piston shaft, 11, cylinder body,
1101, sleeve, 12, first support bar, the 13, first spring, 14, piston plate, 1401, through-hole, 15, second spring, 16, second
Strut, the 17, first fastener, 18, bottom plate, 19, third support rod, the 20, second coil, 21, first coil, 22, displacement sensing
Device, 23, third tapered roller bearing, 24, fixture block, the 25, second fastener, 26, third nut.
Specific embodiment
In the description of the present invention, it should be understood that term " on ", "lower", "top", "bottom", "inner", "outside" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure
It makes and operates, therefore should not be understood as the limitation to scope of protection of the utility model.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection ", " setting " shall be understood in a broad sense, such as may be a fixed connection, be arranged, and be also possible to detachably connect
Connect, be arranged, or be integrally connected, be arranged, for the ordinary skill in the art, can understand as the case may be on
State the concrete meaning of term in the present invention.
The utility model is described in further detail with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, a kind of agricultural machinery damping device based on magnetorheological fluid, including bottom end be opening and
It is provided with the cylinder body 11 of sleeve 1101 among top, seals the bottom plate 18 being coupled, for the opening with cylinder body 11 with screw thread
Piston shaft 10 that connection type is threaded through in sleeve 1101 and the piston plate 14 that 10 lower end of piston shaft is set；The cylinder
Flange is provided with outside the open end of body 11, flange is tightly connected with bottom plate 18 using 17 phase of the first fastener；The piston turns
The external screw thread being threaded through in sleeve 1101 on axis 10 is rectangular external screw thread 9, and rectangular external screw thread 9 is subsection setup, sleeve 1101
The rectangular external screw thread 9 corresponded in piston shaft 10 on inner hole is provided with flat thread slot 8；The piston plate 14 is located at cylinder body 11
It is interior, and the periphery of piston plate 14 is coupled with the sealing of 11 inner wall of cylinder body, piston plate 14 and piston shaft 10 pass through third circular cone
Roller bearing 23 is connected, and the part below third tapered roller bearing 23 is located in piston shaft 10 and piston plate 14 and is set respectively
It is equipped with the protrusion for being used to support 23 inner ring and outer ring of third tapered roller bearing, the upper surface of piston plate 14 passes through the second fastener
25 are fixedly installed the fixture block 24 for being clamped third tapered roller bearing 23, are located at third taper roller axis in piston shaft 10
It holds 23 part above to be fixedly connected there are two the third nut 26 for fixing third tapered roller bearing 23, in protrusion, card
Under block 24 and third nut 26 act on, piston plate 14 is moved up and down with piston shaft 10；The cylinder body 11 is internally located at piston plate
It is provided with magnetorheological fluid between 14 and bottom plate 18, the top inside cylinder body 11 extends downward with first support bar 12, and first
Support rod 12 is two and is uniformly arranged around the central axis of cylinder body 11, is arranged in first support bar 12 for damper piston
The first spring 13 that disk 14 shakes upwards, the lower end of the first spring 13 are fixedly connected with piston plate 14 with the upper of damper piston disk 14
Lower vibration upwardly extends on bottom plate 18 and is provided with the second support column 16, and second support bar 16 is six and in cylinder body 11
Mandrel line is uniformly arranged, and is arranged with the second spring 15 shaken downwards for damper piston disk 14 on the second support column 16, and second
The upper end of spring 15 is fixedly connected with piston plate 14 with the vertical tremor of damper piston disk 14；The upper end of the piston shaft 10 from
It is reached in sleeve 1101 except cylinder body 11, lower end is deep into cylinder body 11 from sleeve 1101, and piston shaft 10 is pierced by set
The part of 1101 upper ends of cylinder is provided with the rack for connecting agricultural machinery rotatably to transmit the Supporting cover 1 of vibration, Supporting cover 1
It is connected with piston shaft 10 by the first tapered roller bearing 3, the upper end of the first tapered roller bearing 3 passes through two the first spiral shells
Step in mother 2 and Supporting cover 1 positions, and the part setting being located at below third tapered roller bearing 23 in piston shaft 10 is useful
In the protrusion of support 23 inner ring of third tapered roller bearing, under protrusion, step and the effect of the first nut 2, Supporting cover 1 is with piston
Shaft 10 moves up and down, and the part below Supporting cover 1 is located in piston shaft 10 and is arranged with baffle 6, baffle 6 and piston shaft 10
It is connected by the second tapered roller bearing 5, the portion below the second tapered roller bearing 5 is located on baffle 6 and piston shaft 10
It is separately provided for the protrusion of support 5 inner ring and outer ring of the second tapered roller bearing, the second circle is located in piston shaft 10
5 part above of taper roller bearing is fixedly connected with the second nut 4 for positioning limitation 5 inner ring of the second tapered roller bearing,
Under protrusion and the effect of the second nut 4, baffle 6 is moved up and down with piston shaft 10, and 6 lower section of baffle is located in piston shaft 10
Part is arranged with third spring 7, and the upper end of third spring 7 is fixedly connected with baffle 6, the lower end of third spring 7 and sleeve 1101
It is fixedly connected, the part between sleeve 1101 is arranged with the third spring 7 for damping, is located at piston plate in piston shaft 10
Lower end below 14 is provided with first coil 21, and first coil 21 is corresponded on bottom plate 18 and is provided with the second coil 20, and second
Third support rod 19 is provided with below coil 20, the lower end of third support rod 19 is fixed on bottom plate 18, the piston
It is provided on disk 14 for the through-hole 1401 of magnetorheological fluid circulation and is become for measuring the distance between piston plate 14 and bottom plate 18
Change to control the displacement sensor 22 of size of current in first coil 21 and the second coil 20.
Above-mentioned cylinder body 11, bottom plate 18, piston shaft 10, piston plate 14, first support bar 12, second support bar 16, third
Support rod 19, the first spring 13, second spring 15, first coil 21, the second coil 20, displacement sensor 22, the rolling of third circular cone
Sub- bearing 23, fixture block 24, the second fastener 25 and third nut 26 are all made of anti-corrosion material.
Concrete operations: when damping device is extruded, Supporting cover 1 is squeezed due to carrying the vehicle frame of agricultural machinery by external force,
Piston shaft 10 can be forced to rotate and move downward under the effect of external force, two the first nuts of 10 upper end of piston shaft setting
2 and two the second nuts 4 rotate downwards with piston shaft 10, Supporting cover 1, the first tapered roller bearing 3, the second taper roller
Bearing 5 and baffle 6 are moved downward with piston shaft 10 without rotating, at this point, third spring 7 is in baffle 6 and sleeve 1101
It is extruded, the energy that mechanical rapid drawdown generates is absorbed under effect；During piston shaft 10 rotates downwards, piston
The flat thread slot 8 in rectangular external screw thread 9 and sleeve 1101 in shaft 10 generates friction with damping；Meanwhile piston shaft 10
The piston plate 14 of lower end connection is moved downward with piston shaft 10 without rotating, third nut 26, third tapered roller bearing
23 and first coil 21 rotate downwards with piston shaft 10, piston plate 14 move downward during respectively by the first spring
13 pulling force and the bounce of second spring 15 act on and slow down downward vibration, the displacement sensing on piston plate 14
Device 22 makes signal processing by measuring-the Y at a distance from bottom plate 18, and signal is sent to microprocessor (not shown), microprocessor
Make to generate electricity in first coil 21 and the second coil 20 by control rheostat (not shown) and double-point double-throw switch (not shown)
Flow and be gradually increased, electromagnetic induction repulsion is generated between two coils, in addition electric current changes, make 11 inner piston disk 14 of cylinder body with
Space between bottom plate 18 is full of magnetic field, and magnetorheological fluid gradually becomes thick by liquid under the magnetic fields being gradually increased,
Magnetic current liquid can be out of through-hole 1401 on piston plate 14 to 14 top of piston plate under the extruding of the piston plate 14 moved downward
11 inner space of cylinder body is overflowed, and electromagnetic induction repulsion and thick magnetorheological fluid hinder vibration and absorb mechanical energy.
When damping device is stretched, with squeezed state on the contrary, piston shaft 10 rotates upwards, third spring 7, first
Spring 13 and 15 active state of second spring are inhaled with when being extruded on the contrary, generating between first coil 21 and the second coil 20 respectively
Gravitation, magnetic current liquid flow back to from through-hole 1401 under the effect of gravity and piston plate 14 are hindered to move upwards.
It is to a kind of the detailed of the agricultural machinery damping device based on magnetorheological fluid provided by the utility model above
Introduction and preferred embodiment, it is obvious to a person skilled in the art that the utility model is not limited to above-mentioned demonstration in fact
The details for applying example can be with other specific shapes in the case where the spirit or technical solution content without departing substantially from the utility model
Formula realizes the utility model.In conclusion embodiment be it is exemplary and non-limiting, the scope of the utility model is by appended power
Benefit requires rather than above description limits, it is intended that all changes that will be fallen within the meaning and scope of the equivalent elements of the claims
Change is embraced therein.
Claims (10)
1. a kind of agricultural machinery damping device based on magnetorheological fluid, it is characterised in that: including bottom end in opening and top
Between be provided with sleeve (1101) cylinder body (11), for cylinder body (11) opening sealing be coupled bottom plate (18), with spiral shell
The piston shaft (10) and be rotatably connected and with piston shaft (10) with work that line connection type is threaded through in sleeve (1101)
The piston plate (14) that plug shaft (10) moves up and down, the upper end of the piston shaft (10) reaches cylinder body from sleeve (1101)
(11) except, lower end is deep into cylinder body (11) from sleeve (1101), and the piston plate (14) is located in cylinder body (11), and
The periphery of piston plate (14) is coupled with the sealing of cylinder body (11) inner wall, and the cylinder body (11) is internally located at piston plate (14) and bottom
Magnetorheological fluid is provided between plate (18), the internal top of cylinder body (11) extends downward with first support bar (12), and first
The first spring (13) shaken upwards for damper piston disk (14) is arranged on support rod (12), bottom plate upwardly extends on (18)
It is provided with second support bar (16), the second bullet shaken downwards for damper piston disk (14) is arranged in second support bar (16)
Spring (15), the part that the piston shaft (10) is pierced by sleeve (1101) upper end be rotatably provided with for connect agricultural machinery with
The Supporting cover (1) of vibration is transmitted, Supporting cover (1) is moved up and down with piston shaft (10), and Supporting cover is located in piston shaft (10)
(1) part between sleeve (1101) is arranged with the third spring (7) for damping, is located at piston plate in piston shaft (10)
(14) lower end below is provided with first coil (21), and first coil (21) is corresponded on bottom plate (18) and is provided with the second coil
(20), be provided on the piston plate (14) for magnetorheological fluid circulation through-hole (1401) and for measure piston plate (14) with
The distance between bottom plate (18) changes to control the displacement sensor of size of current in first coil (21) and the second coil (20)
(22).
2. a kind of agricultural machinery damping device based on magnetorheological fluid as described in claim 1, it is characterised in that: the work
It is rectangular external screw thread (9) that external screw thread in sleeve (1101) is threaded through on plug shaft (10), to taking on service jobs on sleeve (1101) inner hole
Rectangular external screw thread (9) on plug shaft (10) is provided with flat thread slot (8).
3. a kind of agricultural machinery damping device based on magnetorheological fluid as claimed in claim 2, it is characterised in that: the side
Shape external screw thread (9) is subsection setup.
4. a kind of agricultural machinery damping device based on magnetorheological fluid as described in claim 1, it is characterised in that: described the
One support rod (12) is two and the central axis around cylinder body (11) is uniformly arranged on the top in cylinder body (11).
5. a kind of agricultural machinery damping device based on magnetorheological fluid as described in claim 1, it is characterised in that: described the
Two support rods (16) are six and the central axis around cylinder body (11) is uniformly arranged on bottom plate (18).
6. a kind of agricultural machinery damping device based on magnetorheological fluid as described in claim 1, it is characterised in that: described the
One spring (13) and second spring (15) are fixedly connected with piston plate (14) with the vertical tremor of damper piston disk (14).
7. a kind of agricultural machinery damping device based on magnetorheological fluid as described in claim 1, it is characterised in that: the branch
The baffle (6) for tension and compression third spring (7), baffle (6) and piston shaft are provided between support lid (1) and third spring (7)
(10) rotation connection, baffle (6) are moved up and down with piston shaft (10), and the upper end and baffle (6) of third spring (7) are fixed to be connected
It connects, the lower end of third spring (7) is fixedly connected with sleeve (1101).
8. a kind of agricultural machinery damping device based on magnetorheological fluid as described in claim 1, it is characterised in that: described the
It is provided with below two coil (20) third support rod (19), the lower end of third support rod (19) is fixed at bottom plate (18)
On.
9. a kind of agricultural machinery damping device based on magnetorheological fluid as described in claim 1, it is characterised in that: the cylinder
Flange is provided with outside the open end of body (11), flange is mutually fixedly connected with bottom plate (18) using the first fastener (17).
10. a kind of agricultural machinery damping device based on magnetorheological fluid as described in claim 1, it is characterised in that: described
Cylinder body (11), bottom plate (18), piston shaft (10), piston plate (14), first support bar (12), second support bar (16), third
Support rod (19), the first spring (13), second spring (15), first coil (21), the second coil (20) and displacement sensor
(22) it is all made of anti-corrosion material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920274529.0U CN209638301U (en) | 2019-03-05 | 2019-03-05 | A kind of agricultural machinery damping device based on magnetorheological fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920274529.0U CN209638301U (en) | 2019-03-05 | 2019-03-05 | A kind of agricultural machinery damping device based on magnetorheological fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209638301U true CN209638301U (en) | 2019-11-15 |
Family
ID=68495164
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920274529.0U Expired - Fee Related CN209638301U (en) | 2019-03-05 | 2019-03-05 | A kind of agricultural machinery damping device based on magnetorheological fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209638301U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798317A (en) * | 2019-03-05 | 2019-05-24 | 河南科技大学 | A kind of agricultural machinery damping device based on magnetorheological fluid |
| CN111649094A (en) * | 2020-06-04 | 2020-09-11 | 江苏三尔汽车部件有限公司 | Counter weight stable form automobile shock absorber ware |
| CN111649095A (en) * | 2020-06-04 | 2020-09-11 | 江苏三尔汽车部件有限公司 | Automobile shock absorber ware with multistage buffer function |
| CN112078782A (en) * | 2020-09-28 | 2020-12-15 | 重庆工程职业技术学院 | Unmanned aerial vehicle shock-absorbing structure |
-
2019
- 2019-03-05 CN CN201920274529.0U patent/CN209638301U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798317A (en) * | 2019-03-05 | 2019-05-24 | 河南科技大学 | A kind of agricultural machinery damping device based on magnetorheological fluid |
| CN109798317B (en) * | 2019-03-05 | 2024-02-13 | 河南科技大学 | Damping device for agricultural machine based on magnetorheological fluid |
| CN111649094A (en) * | 2020-06-04 | 2020-09-11 | 江苏三尔汽车部件有限公司 | Counter weight stable form automobile shock absorber ware |
| CN111649095A (en) * | 2020-06-04 | 2020-09-11 | 江苏三尔汽车部件有限公司 | Automobile shock absorber ware with multistage buffer function |
| CN112078782A (en) * | 2020-09-28 | 2020-12-15 | 重庆工程职业技术学院 | Unmanned aerial vehicle shock-absorbing structure |
| CN112078782B (en) * | 2020-09-28 | 2022-04-22 | 重庆工程职业技术学院 | Unmanned aerial vehicle shock-absorbing structure |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191115 |