CN109505895B - Magnetorheological fluid brake - Google Patents
Magnetorheological fluid brake Download PDFInfo
- Publication number
- CN109505895B CN109505895B CN201910017745.1A CN201910017745A CN109505895B CN 109505895 B CN109505895 B CN 109505895B CN 201910017745 A CN201910017745 A CN 201910017745A CN 109505895 B CN109505895 B CN 109505895B
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- brake
- shell
- brake disc
- end cover
- blade
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- 239000012530 fluid Substances 0.000 title claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims description 45
- 239000007788 liquid Substances 0.000 claims description 32
- 230000005540 biological transmission Effects 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 10
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 244000309464 bull Species 0.000 description 13
- 230000009471 action Effects 0.000 description 9
- 230000005389 magnetism Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/002—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders comprising a medium with electrically or magnetically controlled internal friction, e.g. electrorheological fluid, magnetic powder
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/44—Mechanical mechanisms transmitting rotation
- F16D2125/46—Rotating members in mutual engagement
- F16D2125/48—Rotating members in mutual engagement with parallel stationary axes, e.g. spur gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a magnetorheological fluid brake, which relates to the technical field of magnetorheological fluid brakes and realizes a braking function through telescopic brake blades arranged between a left brake disc and a right brake disc, wherein gaps between the brake blades and the left brake disc and between the brake blades and the right brake disc are very small after the brake blades extend out of a brake blade temporary storage groove during braking, and the brake function is quickly realized by matching with a magnetic field generated by an electromagnetic coil. The gaps between the left brake disc and the right brake disc and between the left end cover and the right end cover are larger, the viscous resistance is small in zero field, the heat productivity of the magnetorheological fluid brake is low in the driving process of an automobile, the energy loss is reduced, and the braking stability of the magnetorheological fluid brake is effectively ensured; the brake blade is separated from a hydraulic system, the ejection and the contraction of the brake blade are regulated and controlled by means of the instant attraction of the electromagnet and the restoring force of the tension spring, the decoupling of the magnetorheological fluid brake and the brake pedal is realized, and the drive-by-wire brake on a new energy automobile is realized.
Description
Technical Field
The invention relates to the technical field of magnetorheological fluid brakes, in particular to a magnetorheological fluid brake for vehicle braking.
Background
The magnetic rheological liquid is a novel intelligent material, generates rheological effect under the action of an external magnetic field, and instantly presents solid-like characteristics from initial Newtonian fluid characteristics. The magnetorheological process has the advantages of rapid reaction, reversible effect, low energy consumption, strong adaptability and the like. The magnetorheological fluid is applied to an automobile braking system by utilizing the accurate adjustable shear stress of the magnetorheological fluid, and the braking torque of a brake is adjusted by controlling the current of a magnetic field circuit, so that the magnetorheological fluid brake is obtained.
The existing magnetorheological fluid brake generally adopts a mode of setting a gap between a brake disc rotor and a rack fixed disc to be small enough to enable the magnetorheological fluid brake to obtain larger braking torque so as to meet the design requirement. However, the arrangement mode has the problem of large viscous resistance in zero field, so that huge energy loss is formed in the process of continuous running of the automobile, and meanwhile, the magnetorheological fluid brake has high heat productivity and has adverse effect on the braking stability.
Through patent search, the following known technical solutions exist:
patent 1:
application No.: CN201710911441, application date: 2017.09.29, date of authorized announcement: 2018.01.19 the invention relates to a magnetic current liquid brake and its working method, the brake includes a rotor disc, a transmission shaft and a shell, the rotor disc is covered on the transmission shaft and is arranged in the shell, the shell is provided with a steel jacket, the inner side of the steel jacket is provided with a magnet exciting coil, the inner side of the magnet exciting coil is provided with a magnetism isolating ring, the magnetic isolating ring, the shell and the cavity formed by the rotor disc are filled with magnetic current liquid, the front and back surfaces of the rotor disc are provided with a plurality of rectangular grooves. The invention can not only prevent the wall surface sliding effect, but also has simple structure.
Patent 2:
application No.: CN201310393903, application date: 2013.09.02, date of authorized announcement: 2013.12.18, the invention discloses a magneto-rheological brake, belonging to the technical field of mechanical braking. A magnetic conduction ring (14) is arranged in the annular groove of the outer magnetic isolation shell (10), and a magnetic isolation cup (15) is arranged in the annular through groove of the right magnetic conduction shell; a sliding magnetic conduction shaft (21) and a permanent magnet (22) are inserted into round holes of the right magnetic conduction shell II (19) and the inner magnetic isolation shell (6), and the magnetic isolation cup is connected with the sliding magnetic conduction shaft; an extension spring set (16) is arranged in a closed cavity (17) formed by the magnetism isolating cup and the right magnetism conducting shell II, and a pressure oil inlet (18) is formed in the magnetism isolating cup. The magneto-rheological brake adopts the magnet exciting coil for magnetic braking under the normal working condition and provides controllable power; when the magnet exciting coil fails or is powered off, the magnet exciting coil magnetic supply braking mode is quickly switched to the permanent magnet magnetic supply braking mode under the action of the tension spring group and the pressure oil in the sealing cavity, so that the continuation of the braking force of the magnetorheological brake is ensured, and the safety performance and the reliability of the magnetorheological brake are improved.
The said patent utilizes the magnetic rheological liquid to fill between the stator and the rotor, and the magnetic field acting on the gap of the magnetic rheological liquid uniformly makes the magnetic rheological liquid produce shearing yield stress, thereby producing braking torque. The magnetorheological brake has larger viscous torque in zero field, and if the viscous torque in zero field is reduced by increasing the magnetorheological fluid gap, the braking torque in the working process of the magnetorheological fluid brake can be greatly reduced.
The search shows that the technical scheme does not influence the novelty of the invention; and the mutual combination of the above patent documents does not destroy the inventive step of the present invention.
Disclosure of Invention
The invention provides a magnetorheological fluid brake to avoid the defects of the prior art.
The invention adopts the following technical scheme for solving the technical problems: a magnetorheological fluid brake is characterized in that a shell is of a hollow structure, a left end cover and a right end cover are arranged in the shell, a liquid cavity is formed between the left end cover and the right end cover, magnetorheological fluid is filled in the liquid cavity, a left brake disc and a right brake disc are concentrically and parallelly arranged in the liquid cavity, brake blades are arranged between the left brake disc and the right brake disc, the left brake disc and the right brake disc are fixedly connected to a rotating shaft, a gap is reserved between the left brake disc and the right brake disc and the side wall of the liquid cavity, and a brake disc sleeve sleeved on the rotating shaft is arranged between the left brake disc; the rotating shaft penetrates through the shell and is rotatably connected with the shell through a sealing bearing;
the driving mechanism and the transmission mechanism are arranged in the hollow structure, the output end of the driving mechanism is connected to the input end of the transmission mechanism, the output end of the transmission mechanism is connected with each brake blade, and the driving mechanism drives each brake blade to move to or separate from the space between the left brake disc and the right brake disc through the transmission mechanism;
the magnetic conduction plate is fixedly connected with the outer end part of the left end cover, each electromagnetic coil is positioned outside the liquid cavity, is respectively and correspondingly arranged at two sides of each brake blade and is arranged to be close to the left end cover and the right end cover, an iron core is arranged in the magnetic conduction plate, and the magnetic fields generated by the electromagnetic coils are arranged in the same direction.
Furthermore, each pinion is arranged on the periphery of the large gear and meshed with the large gear, a blade shaft is fixedly arranged at the center of each pinion, and the number and the positions of the pinions are arranged corresponding to the number and the positions of the brake blades to form the transmission mechanism; the bull gear is rotatably connected with the rotating shaft through a bearing, and each blade shaft is fixedly connected with each corresponding brake blade.
Furthermore, the armature and the gear wheel stop block are arranged on the gear wheel, the electromagnet and the left shell stop block are arranged on the inner wall of the left side of the shell, and two ends of the tension spring are respectively connected and fixed with the gear wheel stop block and the left shell stop block to form the driving mechanism.
Furthermore, two ends of the tension spring are in hook-shaped structures and are fixedly connected with the gear wheel stop block and the left shell stop block in a hanging mode through the hook-shaped structures at the two ends of the tension spring.
Furthermore, the left end cover and the right end cover are made of magnetic isolation materials, and through holes are correspondingly formed in the positions where the iron cores and the electromagnetic coils are arranged.
Furthermore, the fixed frame comprises the shell, and a left end cover and a right end cover which are fixedly arranged in the shell, the left shell and the right shell are respectively connected to the left end and the right end of the outer shell, and the brackets are arranged at the bottoms of the left shell, the right shell and the outer shell to form the outer shell; the left shell, the right shell and the outer shell form the hollow structure.
Furthermore, shaft seats are arranged at the bottoms of the left end cover and the right end cover corresponding to the positions of the blade shafts and the brake blades, and brake blade temporary storage grooves are formed in the shaft seats; each blade shaft is rotatably connected with each corresponding shaft seat through a bearing, and each brake blade can move and retract into each corresponding brake blade temporary storage groove.
Further, the left end cover and the right end cover are connected through bolts.
Further, an air outlet and a liquid inlet are formed in the right end cover, and the air outlet and the liquid inlet are used for communicating the liquid cavity with the hollow structure of the shell; and a left electric wire passing port and a right electric wire passing port are formed in the side surface of the shell.
The invention provides a magnetorheological fluid brake, which has the following beneficial effects:
1. the gaps between the left brake disc and the right brake disc and between the left end cover and the right end cover are larger, the viscous resistance is small when the automobile is in a zero field, the heat productivity of the magnetorheological fluid brake is low in the driving process of the automobile, the energy loss is reduced, and the braking stability of the magnetorheological fluid brake is effectively ensured;
2. the brake function is realized through the telescopic brake blades arranged between the left brake disc and the right brake disc, and when the brake is performed, the gaps between the brake blades and the left brake disc and the right brake disc are very small after the brake blades extend out of the brake blade temporary storage grooves, and the brake function is quickly realized by matching with a magnetic field generated by the electromagnetic coil;
3. the magnetic field is generated by the electromagnetic coil, so that the magnetorheological fluid provides a large shearing braking torque, the braking response speed is high, and the regulation and the control are easy;
4. the brake blade is separated from a hydraulic system, the ejection and the contraction of the brake blade are regulated and controlled by means of the instant attraction of the electromagnet and the restoring force of the tension spring, the decoupling of the magnetorheological fluid brake and the brake pedal is realized, and the drive-by-wire brake on a new energy automobile is realized.
Drawings
FIG. 1 is a schematic view of the installation position of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a left side view of the drive mechanism of the present invention;
FIG. 4 is a right side view of the drive mechanism of the present invention;
FIG. 5 is a schematic structural diagram of an actuator according to the present invention;
FIG. 6 is a schematic view of the internal structure of the actuator according to the present invention;
FIG. 7 is a schematic structural view of the right end cap of the present invention;
FIG. 8 is a schematic view of the actuator of the present invention in a travel position;
fig. 9 is a schematic view of the actuator of the present invention in braking mode.
In the figure:
100. the device comprises a fixed frame, 101, a bracket, 102, a left shell, 103, an outer shell, 104, a left end cover, 105, a right end cover, 106 and a right shell; 200. the driving mechanism 201, the armature 202, the electromagnet 203 and the tension spring; 300. a transmission mechanism 301, a gearwheel 302, a pinion 303 and a blade shaft; 400. the brake system comprises an actuating mechanism, a brake blade, a brake disc, a brake core, an electromagnetic coil, a brake disc, a brake; 601. an air outlet, 602, a right-side wire through port, 603, a left-side wire through port, 604, a left shell block, 605, a gearwheel block, 606, a brake blade temporary storage groove, 607 and a liquid inlet; a. the magnetic field lines.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. 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.
As shown in fig. 1 to 9, the structural relationship is as follows: the shell is hollow structure, left end cover 104 and right end cover 105 locate in the shell, form the fluid chamber between the two, the fluid chamber intussuseption is filled with magnetorheological suspensions, the concentric parallel of left brake disc 402 and right brake disc 403 locates the fluid chamber, each brake vane 401 is located between left brake disc 402 and right brake disc 403, left brake disc 402 and right brake disc 403 link firmly in axis of rotation 406, leave the clearance with the fluid chamber lateral wall, left brake disc 402 and right brake disc 403 leave great clearance with the inner wall about the fluid chamber, make its viscidity viscous resistance when the zero field as little as possible, simultaneously when the braking, the braking torque that produces here is also very little, can ignore relatively. A brake disc sleeve sleeved on the rotating shaft 406 is arranged between the two to form the actuating mechanism 400; the brake disc sleeve is used to control the spacing between the left brake disc 402 and the right brake disc 403. The rotating shaft 406 penetrates through the shell and is rotatably connected with the shell through a sealing bearing;
the driving mechanism 200 and the transmission mechanism 300 are both arranged in the hollow structure, the output end of the driving mechanism is connected to the input end of the transmission mechanism 300, the output end of the transmission mechanism 300 is connected with each brake blade 401, and the driving mechanism 200 drives each brake blade 401 to move between the left brake disc 402 and the right brake disc 403 or move away from the left brake disc 402 and the right brake disc 403 through the transmission mechanism 300;
the magnetic conduction plate 409 is fixedly connected with the outer end part of the left end cover 104, each electromagnetic coil 405 is positioned outside the liquid cavity, is respectively and correspondingly arranged at two sides of each brake blade 401 and is arranged to be close to the left end cover 104 and the right end cover 105, an iron core 404 is arranged in the magnetic conduction plate, and magnetic fields generated by the electromagnetic coils 405 are arranged in the same direction.
Preferably, each pinion 302 is arranged on the periphery of the bull gear 301 and meshed with the bull gear, the blade shaft 303 is fixedly arranged at the center of each pinion 302, and the number and the positions of the pinions 302 are arranged corresponding to the number and the positions of the brake blades 401 to form the transmission mechanism 300; the large gear 301 is rotatably connected with the rotating shaft 406 through a bearing, each blade shaft 303 is fixedly connected with each corresponding brake blade 401, and the transmission mechanism 300 can realize synchronous driving of each brake blade 401 under the action of the driving mechanism 200.
Preferably, the armature 201 and the bull gear stop 605 are disposed on the bull gear 301, the electromagnet 202 and the left housing stop 604 are disposed on the left inner wall of the housing, and two ends of the tension spring 203 are respectively connected and fixed with the bull gear stop 605 and the left housing stop 604 to form the driving mechanism 200.
When the electromagnet 202 is electrified, the armature 201 is attracted to the electromagnet under the action of magnetic force, and simultaneously, the magnetic force overcomes the elastic force of the tension spring 203 to drive the large gear 301 connected with the armature to rotate so as to drive each small gear 302 to drive each brake blade 401 to rotate between the left brake disc 402 and the right brake disc 403 through the blade shaft 303 to brake.
After the electromagnet 202 is powered off, the magnetic force disappears, the large gear 301 rotates and resets under the action of the elastic force of the tension spring 203, and then each small gear 302 is driven to drive each brake blade 401 to rotate and leave between the left brake disc 402 and the right brake disc 403 through the blade shaft 303, and braking is not performed any more.
Preferably, two ends of the tension spring 203 are hook-shaped structures, and are respectively hooked and fixed with the large gear stop 605 and the left housing stop 604 through the hook-shaped structures at the two ends.
Preferably, the left and right covers 104 and 105 are made of a magnetic isolating material, and a through hole is formed at a position where each iron core 404 and each electromagnetic coil 405 are disposed.
Preferably, the fixed frame 100 comprises a shell, and a left end cover 104 and a right end cover 105 fixedly arranged in the shell, the left shell 102 and the right shell 106 are respectively connected to the left end and the right end of the outer shell 103, and the bracket 101 is arranged at the bottoms of the left shell 102, the right shell 106 and the outer shell 103 to form an outer shell; the left housing 102, the right housing 106, and the outer housing 103 form a hollow structure therebetween.
Preferably, shaft seats are arranged at the bottoms of the left end cover 104 and the right end cover 105 corresponding to the positions of the blade shafts 303 and the brake blades 401, and brake blade temporary storage grooves 606 are arranged on the shaft seats; each blade shaft 303 is rotatably connected to each corresponding shaft seat through a bearing, and each brake blade 401 can move and retract into each corresponding brake blade temporary storage groove 606.
Preferably, the left end cover 104 and the right end cover 105 are connected by bolts.
Preferably, the right end cover 105 is provided with an air outlet 601 and a liquid inlet 607, and the air outlet 601 and the liquid inlet 607 communicate the liquid cavity with the hollow structure of the shell; the side of the outer shell 103 is provided with a left wire passage opening 603 and a right wire passage opening 602.
Example 1
The shell is of a hollow structure, the left end cover 104 and the right end cover 105 are arranged in the shell, a liquid cavity is formed between the left end cover 104 and the right end cover 105, magnetorheological fluid is filled in the liquid cavity, the left brake disc 402 and the right brake disc 403 are concentrically and parallelly arranged in the liquid cavity, each brake blade 401 is arranged between the left brake disc 402 and the right brake disc 403, the left brake disc 402 and the right brake disc 403 are fixedly connected to the rotating shaft 406, a gap is reserved between the left brake disc 402 and the right brake disc 403 and the side wall of the liquid cavity, and a brake disc sleeve sleeved; the rotating shaft 406 penetrates through the shell and is rotatably connected with the shell through a sealing bearing;
the driving mechanism 200 and the transmission mechanism 300 are both arranged in the hollow structure, the output end of the driving mechanism is connected to the input end of the transmission mechanism 300, the output end of the transmission mechanism 300 is connected with each brake blade 401, and the driving mechanism 200 drives each brake blade 401 to move between the left brake disc 402 and the right brake disc 403 or move away from the left brake disc 402 and the right brake disc 403 through the transmission mechanism 300;
the magnetic conduction plate 409 is fixedly connected with the outer end part of the left end cover 104, each electromagnetic coil 405 is positioned outside the liquid cavity, is respectively and correspondingly arranged at two sides of each brake blade 401 and is arranged to be close to the left end cover 104 and the right end cover 105, an iron core 404 is arranged in the magnetic conduction plate, and magnetic fields generated by the electromagnetic coils 405 are arranged in the same direction.
Preferably, each pinion 302 is arranged on the periphery of the bull gear 301 and meshed with the bull gear, the blade shaft 303 is fixedly arranged at the center of each pinion 302, and the number and the positions of the pinions 302 are arranged corresponding to the number and the positions of the brake blades 401 to form the transmission mechanism 300; the large gear 301 is rotatably connected with the rotating shaft 406 through a bearing, and each blade shaft 303 is fixedly connected with each corresponding brake blade 401.
Preferably, the armature 201 and the bull gear stop 605 are disposed on the bull gear 301, the electromagnet 202 and the left housing stop 604 are disposed on the left inner wall of the housing, and two ends of the tension spring 203 are respectively connected and fixed with the bull gear stop 605 and the left housing stop 604 to form the driving mechanism 200. (exactly the same as the previous parts, only for ensuring the technical solution of the embodiment is complete)
The bull gear 301 is mounted on the rotating shaft 406 through a first bearing, a first bearing left end cover and a first bearing right end cover are respectively mounted on two sides of the bull gear 301, a second bearing is arranged on the left side of the first bearing, and a second bearing end cover is mounted on the left side of the first bearing; the left end of the rotating shaft 406 is fixed to the left housing 102 through a second bearing, and a first sleeve is disposed between the first bearing and the second bearing. The second sleeve is disposed on the right side of the first bearing and abuts against the shoulder of the rotating shaft 406.
The vane shaft 303 is connected with a corresponding pinion 302 through a key, a third sleeve is arranged on the left side of the pinion 302, a third bearing is arranged on the left side of the third sleeve, and a third bearing end cover is arranged on the left side of the third sleeve; the third bearing end cap is fixed to the left housing 102 by screws. The right side of the pinion 302 abuts against the corresponding shaft shoulder of the vane shaft 303, the right side of the vane shaft 303 is provided with a spline, and the brake vane 401 is sleeved on the vane shaft 303 and is connected and fixed with the vane shaft 303 through the spline. The fourth sleeve is arranged on the right side of the brake blade 401, and the fourth sleeve is welded and fixed with the blade shaft 303 after the brake blade 401 is installed.
During specific installation, the outer shell of the magnetorheological fluid brake is fixed on an automobile suspension, and the rotating shaft 406 is a transmission shaft of an automobile wheel.
In the normal running process of the automobile, the transmission shaft 406 normally rotates; the electromagnet 202 and the electromagnetic coil 405 are not energized, and each brake blade 401 is accommodated in each brake blade temporary storage groove 606. At this time, the left brake disc 402 and the right brake disc 403 drive the magnetorheological fluid in the fluid cavity to move together, and the zero-field viscous resistance of the brake is small.
When the transmission shaft 406 is braked, the electromagnet 202 is electrified, the armature 201 is attracted with the electromagnet under the action of magnetic force, and meanwhile, the magnetic force overcomes the elastic force of the tension spring 203 to drive the large gear 301 connected with the armature to rotate so as to drive each small gear 302 to drive each brake blade 401 to rotate between the left brake disc 402 and the right brake disc 403 through the blade shaft 303; meanwhile, the electromagnetic coil 405 is electrified to generate a magnetic field, and the shear stress of the magnetorheological fluid generates a huge braking torque to realize the braking of the rotating shaft 406.
In the braking process, currents with different magnitudes are applied to the electromagnetic coil 405 to generate different magnetic field strengths, so that the shearing stress generated by the magnetorheological fluid can be controlled to generate braking torques with different magnitudes.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; 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 (9)
1. The utility model provides a magnetorheological suspensions stopper, shell are hollow structure, and left end lid (104) and right-hand member lid (105) are located in the shell, form the liquid chamber between the two, pack magnetorheological suspensions in the liquid chamber, its characterized in that: a left brake disc (402) and a right brake disc (403) are concentrically arranged in parallel in the liquid cavity, each brake blade (401) is arranged between the left brake disc (402) and the right brake disc (403), the left brake disc (402) and the right brake disc (403) are fixedly connected to a rotating shaft (406), a gap is reserved between the left brake disc (402) and the right brake disc (403) and the side wall of the liquid cavity, and a brake disc sleeve sleeved on the rotating shaft (406) is arranged between the left brake disc and the right brake disc to form an executing mechanism (400); the rotating shaft (406) penetrates through the shell and is in rotating connection with the shell through a sealed bearing;
a driving mechanism (200) and a transmission mechanism (300) are arranged in the hollow structure, an output end of the driving mechanism is connected to an input end of the transmission mechanism (300), an output end of the transmission mechanism (300) is connected with each braking blade (401), and the driving mechanism (200) drives each braking blade (401) to move between the left brake disc (402) and the right brake disc (403) or move away from each other between the left brake disc (402) and the right brake disc (403) through the transmission mechanism (300);
the magnetic conduction plate (409) is fixedly connected to the outer end part of the left end cover (104), each electromagnetic coil (405) is located outside the liquid cavity and respectively and correspondingly arranged on two sides of each braking blade (401) and is arranged to be close to the left end cover (104) and the right end cover (105), an iron core (404) is arranged in each electromagnetic coil (405), and magnetic fields generated by the electromagnetic coils are arranged in the same direction.
2. The magnetorheological fluid brake according to claim 1, wherein: each pinion (302) is arranged on the periphery of the large gear (301) and meshed with the large gear, a blade shaft (303) is fixedly arranged at the center of each pinion (302), and the number and the positions of the pinions (302) are arranged corresponding to the number and the positions of the brake blades (401), so that the transmission mechanism (300) is formed; the large gear (301) is rotatably connected with the rotating shaft (406) through a bearing, and each blade shaft (303) is fixedly connected with each corresponding braking blade (401).
3. A magnetorheological fluid brake according to claim 2, wherein: armature (201) and gear wheel dog (605) are located on gear wheel (301), and electro-magnet (202) and left casing dog (604) are located the left side inner wall of shell, extension spring (203) both ends respectively with gear wheel dog (605) with left side casing dog (604) are connected fixedly, constitute actuating mechanism (200).
4. A magnetorheological fluid brake according to claim 3, wherein: two ends of the tension spring (203) are hook-shaped structures, and are respectively fixedly connected with the big gear stop block (605) and the left shell stop block (604) in a hanging manner through the hook-shaped structures at the two ends.
5. The magnetorheological fluid brake according to claim 1, wherein: the left end cover (104) and the right end cover (105) are made of magnetic isolation materials, and through holes are formed in the positions where the iron cores (404) and the electromagnetic coils (405) are arranged correspondingly.
6. The magnetorheological fluid brake according to claim 1, wherein: the portable multifunctional portable electric tool is further provided with a fixed rack (100), the fixed rack (100) comprises a shell, and a left end cover (104) and a right end cover (105) which are fixedly arranged in the shell, a left shell (102) and a right shell (106) are respectively connected to the left end and the right end of an outer shell (103), and a bracket (101) is arranged at the bottoms of the left shell (102), the right shell (106) and the outer shell (103) to form the outer shell; the left shell (102), the right shell (106) and the outer shell (103) form the hollow structure therebetween.
7. A magnetorheological fluid brake according to claim 2, wherein: the bottom parts of the left end cover (104) and the right end cover (105) are provided with shaft seats corresponding to the positions of the blade shafts (303) and the brake blades (401), and the shaft seats are provided with temporary brake blade storage grooves (606); each blade shaft (303) is rotatably connected with each corresponding shaft seat through a bearing, and each braking blade (401) can move and retract into each corresponding braking blade temporary storage groove (606).
8. The magnetorheological fluid brake according to claim 1, wherein: the left end cover (104) and the right end cover (105) are connected through bolts.
9. The magnetorheological fluid brake of claim 6, wherein: the right end cover (105) is provided with an air outlet (601) and a liquid inlet (607), and the air outlet (601) and the liquid inlet (607) are used for communicating the liquid cavity with the hollow structure of the shell; the side surface of the outer shell (103) is provided with a left electric wire passing hole (603) and a right electric wire passing hole (602).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017745.1A CN109505895B (en) | 2019-01-09 | 2019-01-09 | Magnetorheological fluid brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017745.1A CN109505895B (en) | 2019-01-09 | 2019-01-09 | Magnetorheological fluid brake |
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| Publication Number | Publication Date |
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| CN109505895A CN109505895A (en) | 2019-03-22 |
| CN109505895B true CN109505895B (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910017745.1A Expired - Fee Related CN109505895B (en) | 2019-01-09 | 2019-01-09 | Magnetorheological fluid brake |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765183B (en) * | 2020-07-09 | 2022-02-25 | 中国矿业大学 | Water-cooled emergency brake with variable working space volume |
| CN113446333A (en) * | 2020-10-20 | 2021-09-28 | 柳州职业技术学院 | Multiple-adjustment magnetorheological fluid braking device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000065094A (en) * | 1998-08-19 | 2000-03-03 | Dana Corp | Continuous variable transmission using magnetorheological fluid |
| US6691839B1 (en) * | 1999-07-19 | 2004-02-17 | Axletech International Ip Holdings, Llc | Reduced drag wet disc brake |
| DE10022759A1 (en) * | 2000-05-10 | 2001-11-29 | Siemens Ag | Braking system has additional actuator that can be stimulated by magnetic and/or electric field associated with electrochemical actuator in series mechanical circuit |
| CN1231686C (en) * | 2003-07-24 | 2005-12-14 | 上海交通大学 | Construction variable rotary magnetic current flowing deforming brake |
| CN102878225A (en) * | 2012-10-14 | 2013-01-16 | 吉林大学 | Multiple-piece magneto-rheological fluid torque transferring device |
| CN105251144B (en) * | 2015-11-02 | 2018-05-22 | 上海理工大学 | High-altitude slow-descending equipment based on magnetic rheological liquid damper |
| CN106641020B (en) * | 2017-03-15 | 2018-07-24 | 山东科技大学 | A kind of magnetorheological conduction device |
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| CN109505895A (en) | 2019-03-22 |
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