CN113954807B - Radial extrusion type magnetorheological braking device - Google Patents
Radial extrusion type magnetorheological braking device Download PDFInfo
- Publication number
- CN113954807B CN113954807B CN202111056056.5A CN202111056056A CN113954807B CN 113954807 B CN113954807 B CN 113954807B CN 202111056056 A CN202111056056 A CN 202111056056A CN 113954807 B CN113954807 B CN 113954807B
- Authority
- CN
- China
- Prior art keywords
- disc
- movable
- shell
- sleeve
- fixing ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/08—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/748—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on electro-magnetic brakes
-
- 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
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
-
- 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
-
- 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
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/853—Features relating to cooling for disc brakes with closed cooling system
-
- 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
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
Abstract
The invention discloses a radial extrusion type magnetorheological brake device which comprises an axle, a cylindrical shell, a sleeve, a movable disc, a fixed disc and a disc fixing ring, wherein the sleeve, the movable disc, the fixed disc and the disc fixing ring are arranged in an inner cavity of the shell; the sleeve is fixed on the surface of the axle; the invention designs a horizontal propulsion mechanism, a servo motor increases torque through a speed reducer when magnetorheological fluid begins to solidify, then a sliding rail drives a moving sleeve to feed, a pressure upright post is pressed down through a moving sleeve propulsion inclined plane structure, then a disc fixing ring presses inwards to complete the pressure of a movable disc and a fixed disc, and the clearance between the movable disc and the fixed disc is reduced by matching the design of the inclined planes of the disc-shaped movable disc and the trapezoidal fixed disc, so that radial and axial extrusion is generated on the solidified magnetorheological fluid, the friction of the movable disc and the fixed disc is realized, the braking force is increased, and the effect of complete braking is achieved.
Description
Technical Field
The invention belongs to the field of magnetorheological braking, and particularly relates to a radial extrusion type magnetorheological braking device.
Background
The magnetorheological fluid is widely applied to the fields of aerospace, machining, construction, medical treatment and the like due to the advantages of fast reaction (millisecond level), low energy consumption, easiness in control, good durability, wide working temperature range, long service life and the like.
The brake device can be conveniently manufactured by utilizing the characteristics of the magnetorheological fluid, but the brake device manufactured by the magnetorheological fluid only can use the shear stress of the brake device and can generate smaller braking force. In order to increase the shear stress, we have found the following patent improvements:
1. application No.: 201310028389.6, invention name: a radial extrusion type magnetorheological fluid brake discloses a radial extrusion type magnetorheological fluid brake, and belongs to the field of hydraulic resistance brakes. The invention adds a right magnetic conduction brake shell, a pressurizing device, a coil fixing ring, a pressurizing channel, a right magnet exciting coil and a magnetism isolating ring on the basis of the prior device, wherein the right magnetic conduction brake shell is arranged on the right side of the left magnetic conduction shell, a gap is reserved between the right magnetic conduction brake shell and the left magnetic conduction shell, the pressurizing device is arranged on the outer circumference of the right magnetic conduction brake shell, two magnetorheological fluid gaps are formed between a driving shaft and the left magnetic conduction shell as well as between the driving shaft and the right magnetic conduction brake shell, the magnet exciting coil, the right magnet exciting coil and the magnetism isolating ring are arranged in the gap formed between the right magnetic conduction brake shell and the left magnetic conduction shell, the left magnet exciting coil and the right magnet exciting coil are fixed through the coil fixing ring, and the pressurizing channel is respectively arranged on the right magnetic conduction brake shell, the coil fixing ring and the magnetism isolating ring. The invention has simple assembly and compact structure, and can enhance the reliability of the device and reduce the energy consumption while providing larger braking torque. The invention is used for radially pressurizing the magnetorheological fluid, and has insufficient shear stress and poor braking effect for new energy automobiles.
2. Application No.: 201510173523.0, title of the invention: a circulating magnetorheological suspensions braking system, including magnetorheological suspensions case (1), oil pump (2), cooling device (16) and have magnetorheological suspensions brake of the magnet exciting coil (12) of U-shaped clamp type structure; two magnetic conduction plates (13) on two sides of the excitation coil of the U-shaped clamp structure are respectively fixed on the left end surface of the bearing seat (4) and the right end surface of the connecting plate (14); the magnetorheological fluid tank is communicated with a liquid inlet (3) on the magnetorheological fluid brake through an oil pump; a liquid outlet (15) on the magnetorheological fluid brake is communicated with the magnetorheological fluid tank through a cooling device. The magnet exciting coil in the circulating magnetorheological fluid braking system is convenient to assemble and disassemble; meanwhile, the multi-stage adjustment of the braking force can be conveniently realized; facilitating free flow of the magnetorheological fluid; the magnetorheological fluid working medium realizes the circular flow of the magnetorheological fluid working medium, has good heat dissipation effect and is suitable for occasions with large slip power braking. According to the invention, a plurality of main brake discs and auxiliary brake discs are designed, so that the braking area is increased, but the braking effect in practical application is insufficient.
Disclosure of Invention
The invention aims to solve the technical problems and provides a radial extrusion type magnetorheological brake device with a good brake effect.
In order to realize the purpose, the technical scheme of the invention is as follows:
a radial extrusion type magnetorheological brake device comprises an axle, a cylindrical shell, a sleeve, a movable disc, a fixed disc and a disc fixing ring, wherein the sleeve, the movable disc, the fixed disc and the disc fixing ring are arranged in an inner cavity of the shell; the sleeve is fixed on the surface of the axle; the movable disc and the static disc are provided with a plurality of blocks, the center of each movable disc is provided with a through hole, and the movable discs are sequentially and horizontally arranged on the sleeve through the through holes; the static discs are distributed in the interval of the dynamic discs horizontally in an annular structure, and a gap exists between the adjacent dynamic discs and the static discs; the outer ring of the static disk is fixed in the disk fixing ring;
the above apparatus further comprises:
the magnetism isolating ring is arranged on the outer side of the disk fixing ring, and a plurality of circulation holes are formed in the disk fixing ring;
magnetorheological fluid which flows in a sealing cavity formed by the left bottom surface and the right bottom surface of the shell and the magnetism isolating ring;
the coil is arranged on the outer side of the magnetism isolating ring in an annular structure; the two coils are symmetrically arranged at the left and the right and are embedded in the left and the right bottom surfaces of the shell at intervals;
a holder having a cylindrical shape with an open left bottom surface; the shell is fixed in the support, and the right end of the axle is rotatably connected to the center of the right bottom surface of the support; the lower end of the bracket is provided with a first bearing frame, and the first bearing frame is erected on the mounting platform;
a movable sleeve which is cylindrical and has an open right bottom surface; the openings of the bracket and the movable sleeve are opposite and are connected through threads; the right end of the inner wall of the side surface of the movable sleeve is provided with an inclined surface structure with a thick left part and a thin right part;
the two groups of pressurizing upright columns are symmetrically arranged at the upper end and the lower end of the side surface of the shell; each group of the pressurizing upright columns is provided with two upright columns with the left lower part and the right higher part, and the two upright columns are positioned in the interval between the left coil and the right coil; one end of each group of the pressurizing upright posts is propped against the inclined plane structure, and the other end of each group of the pressurizing upright posts penetrates through the shell and the magnetism isolating ring and then is fixedly connected with the disk fixing ring; the disc fixing ring is horizontally divided into an upper static disc group and a lower static disc group after being connected with the plurality of static discs, and the corresponding positions of the two ends of the disc fixing ring of the upper static disc group and the disc fixing ring of the lower static disc group are respectively connected by rectangular springs;
the right end of the connecting shaft is rotatably connected to the center of the left bottom surface of the moving sleeve;
and the horizontal propelling mechanism is connected with the left end of the connecting shaft.
As a further technical solution, the above horizontal propulsion mechanism includes:
the second bearing frame is erected on the mounting platform;
the sliding rail is horizontally arranged on the second bearing frame;
the sliding block is connected with the sliding rail in a sliding manner;
the servo motor and the speed reducer are fixed on the sliding block and synchronously and horizontally move with the sliding block; the speed reducer is connected with a power output shaft of the servo motor, and the speed reducer is connected with the left end of the connecting shaft through a coupler.
As a further technical solution, the above apparatus further comprises a heat dissipation system, the heat dissipation system comprising:
the water tank is arranged on the mounting platform;
the radiating pipe is arranged in the space between the left coil and the right coil in an annular structure, and one side of the annular structure is disconnected and divided into a water filling port and a water outlet;
the water injection pipe is arranged outside the bracket, one end of the water injection pipe is communicated with the water tank, and the other end of the water injection pipe is communicated with a water injection port of the radiating pipe through a water pump;
and the water outlet pipe is arranged outside the support, one end of the water outlet pipe is communicated with the water tank, and the other end of the water outlet pipe is communicated with the water outlet of the radiating pipe.
As a further technical scheme, a temperature sensor is arranged above the axle of the right bottom surface of the upper shell.
As a further technical scheme, the movable disc plate positioned in the middle is of a disc-shaped structure; the movable discs at the two ends are in a symmetrical semi-disc structure, and the planes of the movable discs face to the bottom surface of the shell; the section of each static disk is in a symmetrical trapezoid structure, and the trapezoid structure is inserted into the interval of the movable disks according to the inner thickness and the outer thickness and is matched with the interval shape of the movable disks.
As a further technical solution, the contact end surface of the pressing column and the inclined surface structure is a spherical surface.
As a further technical scheme, the axle and the left and right bottom surfaces of the shell are sealed through first framework oil seals.
As a further technical scheme, the penetrating position of the pressurizing upright post and the magnetism isolating ring is sealed by a second framework oil seal and a pressing plate.
As a further technical scheme, the shell consists of a left end cover, a middle ring and a right end cover.
As a further technical scheme, the sleeve is connected with the axle in a matched mode through a spline.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention designs a two-stage braking structure, and the braking effect is good.
(1) Primary braking: the friction area of the magnetorheological fluid is increased by designing a plurality of embedded movable discs and static discs, so that the braking force on the axle is large;
(2) Secondary braking: research shows that when braking is carried out, magnetorheological fluid mainly participating in braking is magnetorheological fluid on the surfaces of the moving and static disks, and magnetorheological fluid below the magnetism isolating ring basically does not participate in braking, so that if the magnetorheological fluid not participating in braking is pressurized by a pressurizing rod such as the patent 201310028389.6, the braking effect is inevitably unsatisfactory, and the magnetorheological fluid in the gap between the moving and static disks needs to be pressurized radially and extruded axially, so that a larger braking effect can be generated. On the basis of the research, the invention designs a horizontal propulsion mechanism, when the magnetorheological fluid begins to solidify, a servo motor increases the torque through a speed reducer, then a slide rail drives a moving sleeve to feed, a pressure upright post is pressed down through a moving sleeve propulsion inclined plane structure, then a disc fixing ring presses inwards to complete the pressure of a moving disc and a static disc, and by matching the design of a disc-shaped moving disc and a trapezoid static disc inclined plane, the gap between the moving disc and the static disc is reduced, the magnetorheological fluid after solidification generates radial and axial extrusion, the friction of the moving disc and the static disc is realized, the braking force is increased, and the effect of complete braking is achieved.
2. The invention is suitable for various environments when driving. The invention has a plurality of braking modes which are respectively as follows:
(1) Low current braking torque: the 1A-2A current is accurately controlled. When the slow brake is needed, the current of 1A-2A can be applied to the coil through the PLC, so that the magnetorheological fluid can be solidified to different degrees;
(2) Large-current braking torque: the 3A current + servo motor performs full braking. When emergency braking is generally needed, 3A current can be conducted to the coil through the PLC to achieve complete solidification of magnetorheological fluid, the servo motor drives the moving sleeve to push the inclined surface structure to press the disk fixing ring downwards, the disk fixing ring presses the movable disk inwards to complete pressurization of the movable and fixed disks, and by matching with the design of the inclined surfaces of the disk-shaped movable disk and the trapezoid fixed disk, the gap between the movable disk and the fixed disk is reduced, radial and axial extrusion is generated on the solidified magnetorheological fluid, friction of the movable and fixed disks is achieved, braking force is increased, and therefore complete braking is achieved;
(3) Intermittent braking, 2A-3A pulse current braking, and real-time operation of pulse current. The brake is suitable for braking the vehicle when going downhill;
(4) And (4) mechanical braking, namely when the pressurizing upright column is pressed down to the maximum, the dynamic and static discs are extruded to realize mechanical braking. The brake is suitable for long-term braking of parking.
3. The invention designs the inclined plane structure for the moving sleeve and is matched with the connection of the pressurizing upright post and the disk fixing ring, thereby realizing the purpose of pressurizing a plurality of static disks at the same time by one-time propelling, and not only pressurizing a single disk. Meanwhile, the invention realizes the accurate control of the pressing distance by using the servo motor.
4. The temperature sensor is arranged near the magnetorheological fluid to monitor the temperature of the magnetorheological fluid, and the radiating pipe is arranged on the outer side of the magnetism isolating ring, so that when the temperature is too high, the circulation of cooling liquid in the pipe is realized through the water pump and the water tank, and the cooling effect is achieved.
Drawings
FIG. 1 is a front view of a radial extrusion magnetorheological brake apparatus according to the present invention;
FIG. 2 is a left side view of a radial extrusion magnetorheological brake apparatus of the present invention;
FIG. 3 is a schematic view of the internal structure of the stent of the present invention;
FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 2;
FIG. 5 is an enlarged view of the portion B of FIG. 4;
FIG. 6 is a schematic view of the structure of the housing of the present invention;
FIG. 7 is a schematic view of the structure of the magnetism isolating ring of the present invention;
FIG. 8 is a schematic structural diagram of an upper static disc set and a lower static disc set according to the present invention
FIG. 9 is a schematic structural diagram of a movable disk according to the present invention.
Reference numerals are as follows: 1-axle, 2-shell, 201-left end cover, 202-middle ring, 203-right end cover, 3-sleeve, 4-movable disc, 5-static disc, 6-disc fixed ring, 7-magnetic isolation ring, 8-magnetorheological fluid, 9-coil, 10-bracket, 11-first bearing frame, 12-mounting platform, 13-moving sleeve, 14-pressurizing upright post, 15-rectangular spring, 16-connecting shaft, 17-horizontal propelling mechanism, 1701-second bearing frame, 1702-sliding rail, 1703-sliding block, 1704-servo motor, 1705-speed reducer, 1706-coupling, 18-heat dissipation system, 1801-water tank, 1802-heat dissipation pipe, 1803-water injection pipe, 1804-water pump, 1805-water outlet pipe, 19-temperature sensor, 20-first skeleton oil seal, 21-second skeleton oil seal, 22-pressing plate and 23-spline.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited to the scope of the examples.
Example 1:
as shown in fig. 1-9, a radial extrusion type magnetorheological brake device comprises an axle 1 and a cylindrical shell 2, wherein the shell 2 consists of a left end cover 201, a middle ring 202 and a right end cover 203, and is convenient to disassemble and assemble, and the axle 1 and the left and right bottom surfaces of the shell 2 are sealed through a first framework oil seal 20; the axle 1 horizontally penetrates through the center of the shell 2 and is rotationally connected with the left bottom surface and the right bottom surface of the shell 2; the sleeve 3 is fixed on the surface of the axle 1, and the sleeve 3 is connected with the axle 1 in a matching way through a spline 23; the movable disc 4 and the static disc 5 are provided with a plurality of blocks, the center of each movable disc 4 is provided with a through hole, and the movable discs 4 are sequentially and horizontally arranged on the sleeve 3 through the through holes; the static discs 5 are in an annular structure and are horizontally distributed in the intervals of the movable discs 4, and gaps exist between the adjacent movable discs 4 and the static discs 5, so that the magnetorheological fluid 8 flows in the cavity, and the friction area of the magnetorheological fluid 8 is increased by embedding a plurality of discs, so that the braking force is increased; the outer ring of the static disc 5 is fixed in the disc fixing ring 6; the movable disc 4 positioned in the middle is of a disc-shaped structure, the middle of the disc-shaped structure is thick, the two sides of the disc-shaped structure are thin, and the surface of the disc-shaped structure is an inclined plane; the movable discs 4 at the two ends are in a symmetrical semi-disc structure, and the plane of the movable discs faces the bottom surface of the shell 2; the cross section of each static disc 5 is in a symmetrical trapezoid structure, and the trapezoid structure is inserted into the interval of the movable disc 4 according to the inner thickness and the outer thickness and is matched with the interval shape of the movable disc 4; after the magnetorheological fluid 8 is solidified, the gap between the static disc 5 and the movable disc 4 in the shape can be changed, radial pressure and axial pressure are generated on the magnetorheological fluid 8 participating in braking, and the braking force is improved;
the above apparatus further comprises:
the magnetism isolating ring 7 is arranged on the outer side of the disk fixing ring 6 and isolates the magnetism and the circulation position of the magnetorheological fluid 8;
the magnetorheological fluid 8 flows in a sealing cavity formed by the left bottom surface and the right bottom surface of the shell 2 and the magnetism isolating ring 7; the disk fixing ring 6 is provided with a plurality of circulation holes for the magnetorheological fluid 8 to circulate;
the coil 9 is 1mm in diameter and is arranged outside the magnetism isolating ring 7 in an annular structure; two coils 9 are arranged, are bilaterally symmetrical and are embedded in the left bottom surface and the right bottom surface of the shell 2 at intervals; the coil 9 is assembled after being wound by a winder, and the left and right coils 9 are arranged in series.
A holder 10 having a cylindrical shape with an open left bottom surface; the shell 2 is fixed in the bracket 10, and the right end of the axle 1 is rotatably connected to the center of the right bottom surface of the bracket 10; the lower end of the bracket 10 is provided with a first bearing frame 11, and the first bearing frame 11 is arranged on the mounting platform 12;
a movable sleeve 13 having a cylindrical shape with an open right bottom surface; the openings of the bracket 10 and the movable sleeve 13 are opposite and are connected through screw threads; the right end of the inner wall of the side surface of the movable sleeve 13 is provided with an inclined surface structure which is thick at the left and thin at the right, and when the movable sleeve 13 is rotationally pushed by a thread, the inclined surface structure can gradually press down the pressurizing upright post 14;
two groups of pressurizing upright posts 14 are symmetrically arranged at the upper end and the lower end of the side surface of the shell 2; each group of the pressurizing upright columns 14 is provided with two upright columns which are lower at the left and higher at the right, are matched with the inclined plane trend and are positioned in the interval between the left coil 9 and the right coil 9, and the pressurizing upright columns 14 are made of stainless steel materials, are plated with chrome on the surfaces and enhance the hardness. The oblique angle formed by connecting the vertexes of the two upright columns is the same as the angle of the inclined surface structure of the movable sleeve, and the vertexes of the two upright columns are tangent to the inclined surface structure of the movable sleeve; one end of each group of the pressurizing upright columns 14 is abutted against the inclined plane structure, the abutting end faces of the pressurizing upright columns 14 and the inclined plane structure are spherical surfaces, the other ends of the pressurizing upright columns penetrate through the shell 2 and the magnetism isolating ring 7 and then are fixedly connected with the disk fixing ring 6, and the penetrating positions of the pressurizing upright columns 14 and the magnetism isolating ring 7 are sealed by a second framework oil seal 21 and a pressing plate 22; the disc fixing ring 6 is horizontally divided into an upper static disc group and a lower static disc group after being connected with the plurality of static discs 5, the corresponding positions of the two ends of the disc fixing ring 6 of the upper static disc group and the lower static disc group are respectively connected by rectangular springs 15, magnetorheological fluid 8 is in a liquid state under a general condition, gaps are formed between the static discs 5 and are not interfered with each other, and the rectangular springs 15 are used for ensuring the gaps so that the pressurizing upright column 14 has a pressing space;
the connecting shaft 16 is arranged on the outer side of the movable sleeve 13, and the right end of the connecting shaft 16 is rotatably connected to the center of the left bottom surface of the movable sleeve 13;
and a horizontal pushing mechanism 17 connected to the left end of the connecting shaft 16.
The horizontal pushing mechanism 17 includes:
a second bearing frame 1701, the second bearing frame 1701 being provided on the mounting platform 12;
a slide rail 1702, the slide rail 1702 being horizontally disposed on the second bearing frame 1701;
a slider 1703, wherein the slider 1703 is connected with the slide rail 1702 in a sliding manner;
a servo motor 1704 and a decelerator 1705, wherein the servo motor 1704 and the decelerator 1705 are fixed on the slider 1703 and move horizontally in synchronization with the slider 1703; the reducer 1705 is connected with the power output of the servo motor 1704, the reducer 1705 is used for increasing torque, and the reducer 1705 is connected with the left end of the connecting shaft 16 through a coupler 1706.
The above apparatus further comprises a heat dissipation system 18, the heat dissipation system 18 comprising:
a water tank 1801, disposed on the mounting platform 12;
a radiating pipe 1802 which is arranged in the space between the left coil 9 and the right coil 9 in an annular structure, wherein one side of the annular structure is divided into a water filling port and a water outlet;
a water filling pipe 1803, which is arranged outside the bracket 10, one end of which is communicated with the water tank 1801, and the other end of which is communicated with a water filling port of the radiating pipe 1802 through a water pump 1804;
and a water outlet pipe 1805 arranged outside the support 10, one end of which is communicated with the water tank 1801 and the other end of which is communicated with the water outlet of the radiating pipe 1802. When the cooling device is used, the water pump 1804 is turned on to inject cooling liquid in the water tank 1801 into the radiating pipe 1802 from the water injection pipe 1803, the cooling liquid flows through the device and then takes away heat, and the heat flows back into the water tank 1801 from the water outlet pipe 1805, so that the cooling liquid is recycled and cooled.
And a temperature sensor 19 is arranged above the axle 1 on the right bottom surface of the shell 2 and used for monitoring the temperature of the magnetorheological fluid, and the temperature sensor 19 can adopt a K-shaped thermocouple sensor.
The rotating connection mentioned in the invention is that the finger shafts are connected to the corresponding fixed surfaces through bearings.
The braking principle is as follows:
primary braking: the current is supplied to the coil 9 to increase the magnetic field in the brake, and the magnetorheological fluid 8 in the cavity starts to solidify under the influence of the magnetic field to increase the friction of the movable and static discs 5.
Secondary braking: when the magnetorheological fluid 8 starts to solidify, the torque of the servo motor 1704 is increased through the speed reducer 1705, the sliding rail 1702 drives the moving sleeve 13 to feed, the moving sleeve 13 pushes the inclined plane structure to press the pressurizing upright post 14 downwards, then the disk fixing ring 6 presses inwards to complete the pressurization of the moving and static disks 5, the gap between the moving disk 4 and the static disk 5 is reduced by matching with the design of the inclined planes of the disc-shaped moving disk 4 and the trapezoid static disk 5, the solidified magnetorheological fluid 8 is extruded in the radial direction and the axial direction, the friction of the moving and static disks 5 is realized, the braking force is increased, and the effect of complete braking is achieved.
Before use, the coil 9 of the invention is connected with a conventional current controller, and the current controller is electrically connected with a PLC; the servo motor 1704 and the temperature sensor 19 of the present invention are electrically connected to a PLC, respectively, and the PLC transmits a command from an upper computer.
Multi-mode braking:
(1) Slow braking: 1A-2A current is conducted to the coil 9 through the PLC, and the magnetorheological fluid 8 can be solidified to different degrees;
(2) Emergency braking: the magnetorheological fluid 8 can be completely cured by electrifying 3A current to the coil 9 through the PLC, in addition, the servo motor 1704 drives the movable sleeve 13 to push the inclined surface structure to press the disk fixing ring 6 downwards, the disk fixing ring 6 is pressed inwards to complete the pressurization of the movable and fixed disks 5, the design of the inclined surfaces of the disk-shaped movable disk 4 and the trapezoid movable disk 5 is matched, the gap between the movable disk 4 and the fixed disk 5 is reduced, the magnetorheological fluid 8 after curing is extruded in the radial direction and the axial direction, the friction of the movable and fixed disks 5 is realized, the braking force is increased, and therefore the complete braking is achieved.
(3) Intermittent braking: the 2A-3A pulse current is braked, and the pulse current is operated in real time. The brake is suitable for the snubbing of the vehicle when going downhill.
(4) Mechanical braking: the pressurizing upright post 14 is pressed down maximally, and the movable and static disc sheets 5 are extruded to realize mechanical braking. The brake is suitable for long-term braking of parking.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "leading," "trailing," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the scope of the invention. It is also to be understood that, unless expressly stated or limited otherwise, the terms "connected" and "coupled" are intended to be open-ended, i.e., to mean fixedly attached; can be detachably connected; or may be a point connection; may be a direct connection; may be indirectly connected through an intermediate medium, may communicate between the two elements, and those skilled in the art will understand the specific meaning of the above terms in the present invention in specific situations. The connection of the devices not described in detail in the present invention is understood in the conventional connection manner in the art.
The above-described embodiments are only specific examples for further explaining the object, technical solution and advantageous effects of the present invention in detail, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement and the like made within the scope of the present disclosure are included in the protection scope of the present invention.
Claims (9)
1. A radial extrusion type magnetorheological brake device comprises an axle, a cylindrical shell, a sleeve, a movable disc, a fixed disc and a disc fixing ring, wherein the sleeve, the movable disc, the fixed disc and the disc fixing ring are arranged in an inner cavity of the shell; the sleeve is fixed on the surface of the axle; the movable disc and the static disc are provided with a plurality of blocks, the center of each movable disc is provided with a through hole, and the movable discs are sequentially and horizontally arranged on the sleeve through the through holes; the static discs are distributed in the interval of the dynamic discs horizontally in an annular structure, and a gap exists between the adjacent dynamic discs and the static discs; the outer ring of the static disk is fixed in the disk fixing ring; it is characterized in that the device further comprises:
the magnetism isolating ring is arranged on the outer side of the disk fixing ring, and a plurality of circulation holes are formed in the disk fixing ring;
magnetorheological fluid which flows in a sealing cavity formed by the left bottom surface and the right bottom surface of the shell and the magnetism isolating ring;
the coil is arranged on the outer side of the magnetism isolating ring in an annular structure; the two coils are symmetrically arranged at the left and the right and are embedded in the left and the right bottom surfaces of the shell at intervals;
a holder having a cylindrical shape with an open left bottom surface; the shell is fixed in the bracket, and the right end of the axle is rotatably connected to the center of the right bottom surface of the bracket; the lower end of the bracket is provided with a first bearing frame, and the first bearing frame is erected on the mounting platform;
a movable sleeve which is cylindrical and has an opening on the right bottom surface; the openings of the bracket and the movable sleeve are opposite and are connected through threads; the right end of the inner wall of the side surface of the movable sleeve is provided with an inclined surface structure with a thick left part and a thin right part;
the two groups of pressurizing upright columns are symmetrically arranged at the upper end and the lower end of the side surface of the shell; each group of the pressurizing upright columns is provided with two upright columns with the left lower part and the right higher part, and the two upright columns are positioned in the interval between the left coil and the right coil; one end of each group of the pressurizing upright posts is propped against the inclined plane structure, and the other end of each group of the pressurizing upright posts penetrates through the shell and the magnetism isolating ring and then is fixedly connected with the disk fixing ring; the disc fixing ring is horizontally divided into an upper static disc group and a lower static disc group after being connected with the plurality of static discs, and the corresponding positions of the two ends of the disc fixing ring of the upper static disc group and the corresponding positions of the two ends of the disc fixing ring of the lower static disc group are respectively connected by rectangular springs;
the right end of the connecting shaft is rotatably connected to the center of the left bottom surface of the moving sleeve;
the horizontal propelling mechanism is connected with the left end of the connecting shaft;
the movable disc positioned in the middle part is of a disc-shaped structure; the movable discs at the two ends are in a symmetrical semi-disc structure, and the planes of the movable discs face to the bottom surface of the shell; the section of each static disk is in a symmetrical trapezoid structure, and the trapezoid structure is inserted into the interval of the movable disks according to the inner thickness and the outer thickness.
2. The radial extrusion magnetorheological brake device of claim 1, wherein the horizontal pushing mechanism comprises:
the second bearing frame is erected on the mounting platform;
the sliding rail is horizontally arranged on the second bearing frame;
the sliding block is connected with the sliding rail in a sliding manner;
the servo motor and the speed reducer are fixed on the sliding block and synchronously and horizontally move with the sliding block; the speed reducer is connected with a power output shaft of the servo motor, and the speed reducer is connected with the left end of the connecting shaft through a coupler.
3. The radially extruded magnetorheological brake of claim 1, further comprising a heat dissipation system comprising:
the water tank is arranged on the mounting platform;
the radiating pipe is arranged in the space between the left coil and the right coil in an annular structure, and one side of the annular structure is disconnected and divided into a water filling port and a water outlet;
the water injection pipe is arranged outside the bracket, one end of the water injection pipe is communicated with the water tank, and the other end of the water injection pipe is communicated with a water injection port of the radiating pipe through a water pump;
and the water outlet pipe is arranged outside the support, one end of the water outlet pipe is communicated with the water tank, and the other end of the water outlet pipe is communicated with the water outlet of the radiating pipe.
4. The radial extrusion type magnetorheological brake device according to claim 1, wherein: and a temperature sensor is arranged above the axle on the right bottom surface of the shell.
5. The radial extrusion type magnetorheological brake device according to claim 1, wherein: the abutting end face of the pressurizing upright post and the inclined plane structure is a spherical surface.
6. The radial extrusion type magnetorheological brake device according to claim 1, wherein: the axle and the left and right bottom surfaces of the shell are sealed through a first framework oil seal.
7. The radial extrusion type magnetorheological brake device according to claim 1, wherein: and the penetrating position of the pressurizing upright post and the magnetism isolating ring is sealed by a second framework oil seal and a pressing plate.
8. The radial extrusion type magnetorheological brake device according to claim 1, wherein: the shell consists of a left end cover, a middle ring and a right end cover.
9. The radial extrusion type magnetorheological brake device according to claim 1, wherein: the sleeve is connected with the axle in a matching way through a spline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111056056.5A CN113954807B (en) | 2021-09-09 | 2021-09-09 | Radial extrusion type magnetorheological braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111056056.5A CN113954807B (en) | 2021-09-09 | 2021-09-09 | Radial extrusion type magnetorheological braking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113954807A CN113954807A (en) | 2022-01-21 |
| CN113954807B true CN113954807B (en) | 2022-10-04 |
Family
ID=79461173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111056056.5A Active CN113954807B (en) | 2021-09-09 | 2021-09-09 | Radial extrusion type magnetorheological braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113954807B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1315002A (en) * | 1969-05-05 | 1973-04-26 | Klaue H | Disc brakes |
| US4470487A (en) * | 1982-08-02 | 1984-09-11 | Blatt Leland F | Fail safe brake for drive shafts |
| CN103089863A (en) * | 2013-01-25 | 2013-05-08 | 中国矿业大学 | Radial extrusion type magnetorheological fluid brake |
| CN104806665A (en) * | 2015-04-13 | 2015-07-29 | 中国矿业大学 | Circulating type magnetorheological fluid braking system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006087017A1 (en) * | 2005-02-15 | 2006-08-24 | Kendrion Binder Magnete Gmbh | Electromagnetic permanent magnet brake |
-
2021
- 2021-09-09 CN CN202111056056.5A patent/CN113954807B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1315002A (en) * | 1969-05-05 | 1973-04-26 | Klaue H | Disc brakes |
| US4470487A (en) * | 1982-08-02 | 1984-09-11 | Blatt Leland F | Fail safe brake for drive shafts |
| CN103089863A (en) * | 2013-01-25 | 2013-05-08 | 中国矿业大学 | Radial extrusion type magnetorheological fluid brake |
| CN104806665A (en) * | 2015-04-13 | 2015-07-29 | 中国矿业大学 | Circulating type magnetorheological fluid braking system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113954807A (en) | 2022-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102536722B (en) | Numerical control alternating current permanent magnet servo variable speed variable quantity awry plate type axial plunger hydraulic motor pump | |
| KR20020059728A (en) | Actuator having a central support, and brake calliper comprising such actuator | |
| CN107804308B (en) | Brake master cylinder with parking and service braking functions and braking method thereof | |
| CN104442779B (en) | Movement conversion mechanism and actively the Multifunctional brake system of regulation are turned round with slowing down to increase | |
| CN113954807B (en) | Radial extrusion type magnetorheological braking device | |
| JP2003534155A (en) | Drives, in particular those for closing units, injection units or ejectors of plastic injection molding machines | |
| CN101517261A (en) | Combined vehicle brake with electromechanically operable parking brake and gear for converting a rotary movement into a translational movement | |
| EP1271747A1 (en) | Cooling of the stator of an air-gap sleeve motor | |
| CN103697089B (en) | A kind of self-boosting type magnetic flow liquid braking device carrying out Brake energy recovery | |
| CN101072923A (en) | Door drive, in particular for a revolving door | |
| JP2023165822A (en) | Brake system for mine trucks | |
| EP4102093B1 (en) | Brake device | |
| CN112727951B (en) | Brake with auxiliary braking function | |
| CN204527621U (en) | Aircraft electric braking device | |
| CN103089863A (en) | Radial extrusion type magnetorheological fluid brake | |
| CN113118616A (en) | Pressure-displacement coupling control friction stir welding system | |
| JPH0560157A (en) | Braking actuator | |
| CN103057427B (en) | Magneto-rheological hydraulic brake executing device for electric vehicles | |
| CN108953605B (en) | Ring seal structure with sealing surface extension | |
| CN113830056B (en) | Parking brake unit and electromechanical brake clamp | |
| CN110219910A (en) | Brake caliper | |
| CN212055585U (en) | Basic brake device | |
| CN201003516Y (en) | Motor boost system | |
| CN213594102U (en) | Electromechanical brake for superconducting magnetic levitation vehicle | |
| CN114321440B (en) | Intelligent material driven differential redundancy servo valve and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |