Magnetorheological damper with self-locking function

Abstract

The invention relates to the technical field of magneto-rheological damping, and discloses a magneto-rheological damper with a self-locking function, which comprises a damper shell, a damping mechanism is arranged in the damper shell, a locking mechanism is arranged on one side of the damping mechanism, a cooling mechanism is arranged on the top of the damping mechanism, and a self-locking mechanism is arranged on the other side of the damping mechanism. An anti-sinking mechanism is arranged at the bottom of the damping mechanism; the damping mechanism comprises a connecting rod, the outer portion of the connecting rod is slidably connected to the inner wall of the damper shell, a fixing block is fixedly connected to the inner wall of the damper shell, a connecting rod is slidably connected to the inner wall of the fixing block, and a fixing sleeve rod is fixedly connected to one end of the connecting rod. External force acts on the damper, the connecting rod slides, the magnetic liquid at the bottom in the damper shell is squeezed, so that the magnetic liquid passes through the electromagnetic coil, the viscosity is adjusted by adjusting the magnetic field intensity of the electromagnetic coil, then the damping force is adjusted, and the magnetorheological damper can rapidly respond under different working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of magnetorheological damping, in particular to a magnetorheological damper with a self-locking function. Background Art

[0002] As a device to slow down or control vibration, impact and shock, dampers are widely used in various fields such as machinery, construction and vehicles, aiming to improve the stability, comfort and durability of the system. Traditional dampers usually use hydraulic pressure, air pressure or springs to consume or absorb energy in the system by changing the flow or deformation of the medium. However, with the advancement of science and technology, traditional mechanical dampers often show limitations when facing complex and high-frequency vibration environments, such as inflexible adjustment, high energy consumption, slow response speed and large temperature change impact. In order to overcome the shortcomings of traditional dampers, magnetorheological dampers came into being;

[0003] A magnetorheological damper is a new type of intelligent damper that utilizes the characteristics of magnetorheological fluid. Magnetorheological fluid is a liquid containing ferromagnetic particles. When an external magnetic field is applied, the ferromagnetic particles will quickly aggregate, causing the viscosity of the liquid to change significantly, thereby affecting the magnitude of the damping force. Existing magnetorheological dampers can adjust the viscosity of the magnetorheological fluid in real time by controlling the current of the electromagnetic coil, thereby achieving rapid adjustment of the damping effect. However, existing magnetorheological dampers will become unstable in performance in harsh working environments or when encountering abnormal conditions, affecting the safety and reliability of the overall system and causing damage. In addition, when the electromagnetic coil is running for a long time, it will generate heat, which will affect the viscosity of the magnetic fluid. After the magnetic fluid is used for a long time, precipitation will occur, which will affect the damping effect of the magnetorheological damper. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a magnetorheological damper with a self-locking function, which solves the problem that the existing magnetorheological damper may be unstable in performance in harsh working environments or encounter abnormal conditions, affecting the safety and reliability of the overall system and causing damage, and that the electromagnetic coil may generate heat when running for a long time, thereby affecting the viscosity of the magnetic fluid and further affecting the damping effect.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a magnetorheological damper with a self-locking function, comprising a damper housing, a damping mechanism is arranged inside the damper housing, a locking mechanism is arranged on one side of the damping mechanism, a cooling mechanism is arranged on the top of the damping mechanism, and an anti-sinking mechanism is arranged on the bottom of the damping mechanism;

[0006] The damping mechanism includes a connecting rod, the outer part of the connecting rod is slidably connected to the inner wall of the damper housing, the inner wall of the damper housing is fixedly connected with a fixed block, the inner wall of the fixed block is slidably connected with the connecting rod, one end of the connecting rod is fixedly connected with a fixed sleeve rod, two connecting grooves are penetrated through the top of the fixed block, and an electromagnetic coil is arranged inside the fixed block.

[0007] Preferably, the cooling mechanism includes a connecting rod, one end of the connecting rod is fixedly connected to the outside of the connecting rod, the inner wall of the damper housing is slidably connected to a piston, the top of the connecting rod is fixedly connected to the bottom of the piston, one side of the damper housing is fixedly connected to an air intake pipe, the side of the damper housing away from the air intake pipe is fixedly connected to an air outlet pipe, the bottom end of the air outlet pipe is fixedly connected to the inner wall of a fixed block, a diversion pipe is arranged inside the fixed block, one end of the air outlet pipe is fixedly connected to the outside of the diversion pipe, and the side of the diversion pipe away from the air outlet pipe is fixedly connected to an exhaust pipe.

[0008] Preferably, the locking mechanism includes a motor, the outside of the motor is fixedly connected to the inside of the damper housing, the output end of the motor is fixedly connected to a driving gear, the inside of the fixed block is rotatably connected to a driven gear, and the inner wall of the driven gear is penetrated by two connecting grooves.

[0009] Preferably, the anti-sinking mechanism includes a rotating rod, the outer part of the rotating rod is rotatably connected to the inner wall of the damper housing, the top of the rotating rod is fixedly connected with a threaded ring, the outer part of the threaded ring is fixedly connected with a plurality of connecting blocks, the bottom of the fixed sleeve is fixedly connected with a threaded rod, and the outer part of the threaded rod is threadedly connected to the inner wall of the threaded ring.

[0010] Preferably, a first connector is fixedly connected to the top of the damper housing, and a second connector is fixedly connected to the bottom of the damper housing.

[0011] Preferably, the communicating groove is arranged directly above the connecting groove, and the communicating groove is communicated with the connecting groove.

[0012] Preferably, the inner wall of the fixed block is rotatably connected to two limit sliders, and the bottom of the limit slider is fixedly connected to the top of the driven gear.

[0013] Preferably, a dust cover is detachably mounted on the outside of the exhaust duct, and a filter is mounted on the inner wall of the intake duct.

[0014] Preferably, one-way valves are installed outside the air inlet pipe and the air outlet pipe, and the electromagnetic coil is arranged outside the connecting groove.

[0015] Preferably, the abnormal response magnetorheological locking system includes a sensor unit, a signal conditioning unit, a signal receiving and processing unit, and a control unit;

[0016] The sensor unit is used to monitor the magnetorheological damper and system status in real time and capture signals of excessive pressure and excessive vibration;

[0017] The signal conditioning unit is used to amplify, filter, and remove noise from the original signal output by the sensor;

[0018] The signal receiving and processing unit is used to receive the processed signal from the signal conditioning unit, and analyze and judge according to a preset threshold value;

[0019] The control unit is used to determine whether a locking operation is required according to the received abnormal signal. The present invention provides a magnetorheological damper with a self-locking function. It has the following beneficial effects:

[0020] 1. The present invention applies external force to the damper to make the connecting rod slide, thereby squeezing the magnetic fluid at the bottom of the damper housing, so that the magnetic fluid passes through the electromagnetic coil, and then the viscosity is adjusted by adjusting the magnetic field strength of the electromagnetic coil, thereby adjusting the damping force. In this way, the magnetorheological damper can respond quickly under different working conditions and provide the required damping effect, thereby ensuring the stability and comfort of the system.

[0021] 2. When the system detects an abnormal signal, the sensor unit captures the abnormality, the signal conditioning unit processes the signal and transmits it to the control unit, and the control unit determines and starts the locking operation. In this way, the sensor unit detects and analyzes these abnormal signals in real time, and automatically starts the self-locking function, thereby effectively preventing equipment damage or safety hazards caused by the abnormality.

[0022] 3. In the process of movement of the connecting rod of the present invention, cooling gas flows into the system through the air intake pipe to maintain a stable temperature, so that the temperature inside the damper can be kept stable to avoid the degradation of damping performance due to overheating. At the same time, the threaded rod and the threaded ring cooperate to stir the magnetic fluid to prevent its sedimentation and failure, thereby extending the service life of the damper and improving its long-term operation reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2 It is a schematic diagram of the internal structure of the damper housing of the present invention;

[0025] Figure 3 It is a schematic diagram of the rotating rod structure of the present invention;

[0026] Figure 4It is a schematic diagram of the diversion pipeline structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the electromagnetic coil of the present invention;

[0028] Figure 6 It is a schematic diagram of the filter structure of the present invention;

[0029] Figure 7 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 8 This is a flow chart of the abnormal response magnetorheological locking system of the present invention.

[0031] Among them, 1. damper housing; 2. connector 1; 3. connector 2; 4. damping mechanism; 401. connecting rod; 402. fixed sleeve rod; 403. fixed block; 404. connecting groove; 405. electromagnetic coil; 5. anti-sinking mechanism; 501. threaded rod; 502. threaded ring; 503. connecting block; 504. rotating rod; 6. cooling mechanism; 601. connecting rod; 602. piston; 603. air inlet pipe; 604. air outlet pipe; 605. one-way valve; 606. diversion pipe; 607. exhaust pipe; 608. dust cover; 609. filter; 7. locking mechanism; 701. motor; 702. driving gear; 703. driven gear; 704. connecting groove; 705. limit slider. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Please see attached Figure 1 , Attachment Figure 2 and attached Figure 4 An embodiment of the present invention provides a magnetorheological damper with a self-locking function, including a damper housing 1, a damping mechanism 4 is arranged inside the damper housing 1, the damping mechanism 4 is used to adjust the damping size, a locking mechanism 7 is arranged on one side of the damping mechanism 4, the locking mechanism 7 is used to fix the position of the damper by mechanical means in abnormal situations or when needed, a cooling mechanism 6 is arranged on the top of the damping mechanism 4, the cooling mechanism 6 is used to cool the electromagnetic coil 405, and an anti-sinking mechanism 5 is arranged at the bottom of the damping mechanism 4, the anti-sinking mechanism 5 is used to prevent the magnetorheological fluid inside the damper from settling due to gravity or other reasons.

[0034] Please see attached Figure 2 , Attachment Figure 4 and attached Figure 5 The damping mechanism 4 includes a connecting rod 401, the outer portion of the connecting rod 401 is slidably connected to the inner wall of the damper housing 1, the inner wall of the damper housing 1 is fixedly connected with a fixed block 403, the fixed block 403 is used to provide support, the inner wall of the fixed block 403 is slidably connected with the connecting rod 401, one end of the connecting rod 401 is fixedly connected with a fixed sleeve rod 402, the fixed sleeve rod 402 is used to squeeze the magnetic fluid in the damper housing 1, two connecting grooves 404 are formed through the top of the fixed block 403, the connecting grooves 404 are used to guide the flow of the magnetorheological fluid, and an electromagnetic coil 405 is arranged inside the fixed block 403, and the electromagnetic coil 405 is used to adjust the current to change the viscosity of the magnetorheological fluid. The locking mechanism 7 includes a motor 701, which is used to provide power support. The outside of the motor 701 is fixedly connected to the inside of the damper housing 1. The damper housing 1 is used to ensure that the motor 701 is fixed. The output end of the motor 701 is fixedly connected to a driving gear 702, which is used to drive the driven gear 703 to achieve mechanical linkage. The internal rotation of the fixed block 403 is connected to the driven gear 703. The inner wall of the driven gear 703 is penetrated by two connecting grooves 704, and the connecting groove 704 is used to connect with the connecting groove 404. The top of the damper housing 1 is fixedly connected to a connector 2, which provides an interface for the installation of the damper and the system connection. The bottom of the damper housing 1 is fixedly connected to a connector 2 3 to achieve connection with an external device or system. The connecting groove 404 is arranged directly above the connecting groove 704, and the connecting groove 404 is connected to the connecting groove 704 to maintain the circulation of the magnetic fluid. The inner wall of the fixed block 403 is rotatably connected to two limit sliders 705 , which ensure that the driven gear 703 maintains a correct running track, and the bottom of the limit slider 705 is fixedly connected to the top of the driven gear 703 .

[0035] Please see attached Figure 5 , Attachment Figure 6 and attached Figure 7The cooling mechanism 6 includes a connecting rod 601, one end of which is fixedly connected to the outside of the connecting rod 401, and the connecting rod 401 is used to enable the connecting rod 601 to perform corresponding displacement. The inner wall of the damper housing 1 is slidably connected with a piston 602, and the sliding fit of the piston 602 enables the cooling gas to flow effectively in the damper housing 1. The top of the connecting rod 601 is fixedly connected to the bottom of the piston 602, and one side of the damper housing 1 is fixedly connected with an air inlet pipe 603, and the air inlet pipe 603 is used to introduce external cooling gas. The side of the damper housing 1 away from the air inlet pipe 603 is fixedly connected with an air outlet pipe 604, and the air outlet pipe 604 is used to transport gas to the shunt pipe 606. The bottom end of the air outlet pipe 604 is fixedly connected to the inner wall of the fixed block 403, and the fixed block 403 is provided with a shunt pipe 606. The channel 606 helps to shunt the cooling gas. One end of the outlet pipe 604 is fixedly connected to the outside of the shunt pipe 606 to ensure smooth flow of gas. The side of the shunt pipe 606 away from the outlet pipe 604 is fixedly connected to an exhaust pipe 607. The exhaust pipe 607 is used to discharge the gas out of the system. A dust cover 608 is detachably installed on the outside of the exhaust pipe 607. The dust cover 608 is used to prevent external dust from entering the exhaust pipe 607. A filter screen 609 is installed on the inner wall of the inlet pipe 603. The filter screen 609 can filter out impurities in the air. A one-way valve 605 is installed on the outside of the inlet pipe 603 and the outlet pipe 604. The one-way valve 605 ensures that the cooling gas can only flow in a predetermined direction. The electromagnetic coil 405 is arranged on the outside of the connecting groove 404. The electromagnetic coil 405 adjusts the viscosity of the magnetorheological fluid through the action of the magnetic field.

[0036] Please see attached Figure 2 and attached Figure 3 The anti-sinking mechanism 5 includes a rotating rod 504, the outer part of which is rotatably connected to the inner wall of the damper housing 1, and the rotating rod 504 is used to make the threaded ring 502 rotate stably. The top of the rotating rod 504 is fixedly connected with the threaded ring 502, and the outer part of the threaded ring 502 is fixedly connected with a plurality of connecting blocks 503. The connecting blocks 503 are used to stir the magnetic fluid in the damper housing 1, and the bottom of the fixed sleeve 402 is fixedly connected with a threaded rod 501, and the outer part of the threaded rod 501 is threadedly connected to the inner wall of the threaded ring 502. The cooperation between the threaded rod 501 and the threaded ring 502 enables the threaded ring 502 to stir the magnetorheological fluid inside the damper housing 1 during rotation.

[0037] Please see attached Figure 2 and attached Figure 8The abnormal response magnetorheological locking system is used to monitor and handle abnormal conditions in the magnetorheological damper system. The abnormal response magnetorheological locking system includes a sensor unit, a signal conditioning unit, a signal receiving and processing unit, and a control unit. The sensor unit is used to monitor the magnetorheological damper and the system status in real time, capture the signal of excessive pressure and excessive vibration, and thus provide real-time feedback to adjust the system status in time. The signal conditioning unit is used to amplify, filter, and denoise the original signal output by the sensor to ensure that the signal is interference-free and clear during transmission, and improve the accuracy and reliability of the signal. The signal receiving and processing unit is used to receive the processed signal from the signal conditioning unit, and analyze and judge according to the preset threshold value to judge whether the system is in an abnormal state, such as excessive pressure or excessive vibration. The control unit is used to judge whether a locking operation is required according to the received abnormal signal, and trigger the control measures by judging that the threshold exceeds the safety range, and decide whether to start the locking mechanism, so as to adjust or lock the magnetorheological fluid in time to ensure that the system can still operate safely and prevent damage under abnormal conditions.

[0038] Working principle: When the device is used, when an external force acts on the damper, the connecting rod 401 is driven to slide on the inner wall of the damper housing 1 and the inner wall of the fixed block 403, thereby cooperating with the action of the fixed sleeve rod 402 to squeeze the magnetic fluid inside the damper housing 1, so that the magnetic fluid passes through the connecting groove 404, so that the current is controlled by the electromagnetic coil 405 in the fixed block 403, thereby affecting the viscosity of the magnetorheological fluid, and then by adjusting the current of the electromagnetic coil 405, the magnetic field strength generated by it is adjusted, thereby adjusting the magnitude of the damping force;

[0039] When the self-locking function is needed, when the damper has an abnormal situation during operation, the sensor unit monitors the system status in real time, captures these abnormal signals and converts them into original signal outputs, and the signal conditioning unit amplifies, filters and denoises these original signals to ensure that the signals are clear and free of interference. Subsequently, the signal receiving and processing unit receives and analyzes the processed signals, and makes a comparison with the preset threshold value to make a judgment. If the signal exceeds the preset safety range, the control unit makes a judgment based on the received abnormal signal to decide whether to start the locking operation. If the abnormality is confirmed, the control unit activates the self-locking function of the damper by activating the magnetorheological locking module, thereby starting the motor 701, and the driving gear 702 drives the driven gear 703, and the driven gear 703 rotates, so that the connecting groove 404 and the connecting groove 704 are offset, thereby locking;

[0040] During the movement of the connecting rod 401, the connecting rod 601 is moved to drive the piston 602 to slide in the damper housing 1, the air inlet pipe 603 introduces the cooling gas, and the gas is output through the air outlet pipe 604, thereby flowing to the exhaust pipe 607 through the diversion pipe 606, thereby ensuring the internal temperature of the damper to be stable and avoiding performance degradation due to overheating; the connecting rod 401 is moved, so that the threaded rod 501 cooperates with the threaded ring 502, thereby driving the threaded ring 502 to rotate, stirring the magnetic fluid inside the damper housing 1, thereby preventing the magnetic fluid in the damper housing 1 from losing its function due to sedimentation.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetorheological damper with a self-locking function, comprising a damper housing (1), characterized in that: A damping mechanism (4) is arranged inside the damper housing (1), a locking mechanism (7) is arranged on one side of the damping mechanism (4), a cooling mechanism (6) is arranged on the top of the damping mechanism (4), and an anti-sinking mechanism (5) is arranged on the bottom of the damping mechanism (4); The damping mechanism (4) comprises a connecting rod (401), the outer portion of the connecting rod (401) is slidably connected to the inner wall of the damper housing (1), the inner wall of the damper housing (1) is fixedly connected to a fixing block (403), the inner wall of the fixing block (403) is slidably connected to the connecting rod (401), one end of the connecting rod (401) is fixedly connected to a fixing sleeve rod (402), two connecting grooves (404) are provided through the top of the fixing block (403), and an electromagnetic coil (405) is arranged inside the fixing block (403).

2. A magnetorheological damper with self-locking function according to claim 1, characterized in that: The cooling mechanism (6) comprises a connecting rod (601), one end of which is fixedly connected to the outside of the connecting rod (401); the inner wall of the damper housing (1) is slidably connected to a piston (602); the top end of the connecting rod (601) is fixedly connected to the bottom of the piston (602); one side of the damper housing (1) is fixedly connected to an air intake pipe (603); a side of the damper housing (1) away from the air intake pipe (603) is fixedly connected to an air outlet pipe (604); the bottom end of the air outlet pipe (604) is fixedly connected to the inner wall of a fixed block (403); a shunt pipe (606) is arranged inside the fixed block (403); one end of the air outlet pipe (604) is fixedly connected to the outside of the shunt pipe (606); and a side of the shunt pipe (606) away from the air outlet pipe (604) is fixedly connected to an exhaust pipe (607).

3. The magnetorheological damper with self-locking function according to claim 1, characterized in that: The locking mechanism (7) comprises a motor (701), the exterior of the motor (701) is fixedly connected to the interior of the damper housing (1), the output end of the motor (701) is fixedly connected to a driving gear (702), the interior of the fixed block (403) is rotatably connected to a driven gear (703), and the inner wall of the driven gear (703) is penetrated by two connection grooves (704).

4. The magnetorheological damper with self-locking function according to claim 1, characterized in that: The anti-sinking mechanism (5) comprises a rotating rod (504), the outer portion of the rotating rod (504) is rotatably connected to the inner wall of the damper housing (1), the top of the rotating rod (504) is fixedly connected to a threaded collar (502), the outer portion of the threaded collar (502) is fixedly connected to a plurality of connecting blocks (503), the bottom of the fixed sleeve (402) is fixedly connected to a threaded rod (501), and the outer portion of the threaded rod (501) is threadedly connected to the inner wall of the threaded collar (502).

5. The magnetorheological damper with self-locking function according to claim 1, characterized in that: The top of the damper housing (1) is fixedly connected to a connector 1 (2), and the bottom of the damper housing (1) is fixedly connected to a connector 2 (3).

6. The magnetorheological damper with self-locking function according to claim 1, characterized in that: The communicating groove (404) is arranged directly above the connecting groove (704), and the communicating groove (404) is in communication with the connecting groove (704).

7. The magnetorheological damper with self-locking function according to claim 1, characterized in that: The inner wall of the fixed block (403) is rotatably connected to two limiting sliders (705), and the bottom of the limiting slider (705) is fixedly connected to the top of the driven gear (703).

8. The magnetorheological damper with self-locking function according to claim 2, characterized in that: A dust cover (608) is detachably mounted on the outside of the exhaust duct (607), and a filter screen (609) is mounted on the inner wall of the intake duct (603).

9. The magnetorheological damper with self-locking function according to claim 2, characterized in that: One-way valves (605) are installed outside the air inlet pipe (603) and the air outlet pipe (604), and the electromagnetic coil (405) is arranged outside the connecting groove (404).

10. An abnormal response magnetorheological locking system, applied to a magnetorheological damper with self-locking function according to any one of claims 1 to 9, characterized in that: The abnormal response magnetorheological locking system includes a sensor unit, a signal conditioning unit, a signal receiving and processing unit, and a control unit; The sensor unit is used to monitor the magnetorheological damper and system status in real time and capture signals of excessive pressure and excessive vibration; The signal conditioning unit is used to amplify, filter, and remove noise from the original signal output by the sensor; The signal receiving and processing unit is used to receive the processed signal from the signal conditioning unit, and analyze and judge according to a preset threshold value; The control unit is used to determine whether a locking operation is required according to the received abnormal signal.

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