WO2014106450A1 - 磁流体刹车鼓装置 - Google Patents

磁流体刹车鼓装置 Download PDF

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Publication number
WO2014106450A1
WO2014106450A1 PCT/CN2013/091243 CN2013091243W WO2014106450A1 WO 2014106450 A1 WO2014106450 A1 WO 2014106450A1 CN 2013091243 W CN2013091243 W CN 2013091243W WO 2014106450 A1 WO2014106450 A1 WO 2014106450A1
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WO
WIPO (PCT)
Prior art keywords
brake
fluid
pad
specific gravity
power pad
Prior art date
Application number
PCT/CN2013/091243
Other languages
English (en)
French (fr)
Inventor
杨国辉
Original Assignee
Yang Guohui
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Filing date
Publication date
Application filed by Yang Guohui filed Critical Yang Guohui
Publication of WO2014106450A1 publication Critical patent/WO2014106450A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D49/00—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like
    • F16D49/16—Brakes with two brake-blocks
    • 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
    • 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
    • F16D65/80—Features relating to cooling for externally-engaging brakes
    • F16D65/813—Features relating to cooling for externally-engaging 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
    • 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

Definitions

  • the present invention relates to a brake device, and more particularly to a magnetic fluid brake drum device. Background technique
  • the brake device of the existing motor vehicle and some equipments when braking, uses the hydraulic device to drive the frictional resistance between the brake pad and the brake disc to brake, the impact force of the brake is large, and the temperature of the brake pad and the brake disc is relatively high.
  • the brake pads are prone to wear, which affects the service life of the brake pads and the brake discs, and is also not conducive to the safety of the brakes. Summary of the invention
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a magnetic fluid brake drum device for use in a motor vehicle and a device.
  • the magnetic field of the electromagnetic coil of the controller is used to control the specific gravity of the magnetic fluid by using a magnetic field, and the gravity of the magnetic fluid is used to drive.
  • the brake pad rubs against the brake disc and uses brake fluid to reduce the temperature of the brake pads and the brake disc.
  • the magnetic fluid brake drum device comprises a casing, a brake disc, a rotating shaft, a brake pawl, a brake power pad, a magnetic fluid, a brake fluid, an electromagnetic coil and a controller; the brake disc and the rotation
  • the shaft is fixedly connected, and the rotating shaft is mechanically coupled with the bearing of the outer casing.
  • the brake disc is sealed in the brake cavity of the outer casing, and the brake cavity is provided with brake fluid; the brake claw is located above the brake disc, and the brake claw is located The brake pad is located opposite the braking surface of the brake disc, and the brake claw is hinged to the outer casing.
  • the brake claw is provided with a spring and the outer casing, and the brake claw is pulled by the elastic force of the spring, so that the brake pad of the brake pawl is away from the braking surface of the brake disc.
  • the brake power pad is located above the brake pawl, the brake power pad is sealed with magnetic fluid, the electromagnetic coil is disposed outside the brake power pad, the magnetic flux of the electromagnetic coil passes through the magnetic fluid, the controller is provided with the control wire and the electromagnetic coil, the brake power
  • the specific gravity of the pad is less than the specific gravity of the brake fluid, and the gravity of the brake power pad is less than the buoyancy of the brake power pad to the brake fluid.
  • the outer casing is fixedly connected with the frame of the motor vehicle or equipment, and the rotating shaft is fixedly connected with the rotating shaft that needs to be braked; when braking, the power supply of the electromagnetic coil is turned on by the controller, the electromagnetic coil generates a magnetic field, and the magnetic field will brake the power pad.
  • the magnetic field strength of the electromagnetic coil is continuously increased by the controller, so that the specific gravity of the magnetic fluid is continuously increased, so that the specific gravity of the brake power pad is greater than
  • the specific gravity of the brake fluid is such that the specific gravity of the brake power pad is greater than the specific gravity of the brake fluid, so that the brake power pad pushes the brake pad of the brake pawl downward against the spring force of the spring, so that the brake pad rubs against the brake disc, and the brake pad is utilized.
  • the outer casing is provided with a heat sink, and the heat generated by the friction between the brake pad and the brake disc is transmitted through the brake fluid When it is delivered to the outer casing, the heat is dissipated from the outer casing to improve the heat dissipation effect, reduce the temperature at which the brake pad rubs against the brake disc, and increase the service life of the brake pad and the brake disc.
  • the magnetic fluid brake drum device includes a casing, a brake disc, a rotating shaft, a brake pawl, a brake power pad, a magnetic fluid, a brake fluid, an electromagnetic coil, and a controller; a magnetic field using a controller electromagnetic coil
  • the magnetic field is used to control the specific gravity of the magnetic fluid in the brake power pad, and the change of the gravity of the magnetic fluid is used to control the movement of the brake power pad.
  • the brake power pad is used to drive the brake pad and the brake disk to brake the brake, and the brake fluid is used to reduce the brake.
  • the temperature of the piece and the brake disc increases the service life of the brake pads and the brake disc.
  • Figure 1 is a schematic view showing the structure of a magnetic fluid brake drum device
  • Figure 2 is a left side view of Figure 1. detailed description
  • the magnetic fluid brake drum device includes a housing 1, a brake disc 2, a rotating shaft 3, a brake pawl 4, and a brake power pad. 5.
  • the brake disc 2 is sealed in the brake cavity 10 of the outer casing 1.
  • the brake cavity 10 is provided with brake fluid 7; the brake pawl 4 is located above the brake disc 2, and the brake pads of the brake pawl 4 are provided.
  • the brake pawl 4 is hinged to the outer casing 1, the brake pawl 4 is provided with a spring 13 connected to the outer casing 1, the spring 13 is a tension spring, and the inner end of the spring 13-end and the outer casing 1 is connected.
  • a sealing ring 22 is provided between the rotating shaft 3 and the bearing housing 21 of the outer casing 1 for reducing leakage of the brake fluid 7.
  • the working principle of the magnetic fluid brake drum device is: When in use, the outer casing 1 is fixedly connected with the frame of the motor vehicle or equipment, and the rotating shaft 3 is fixedly connected with the rotating shaft that needs to be braked; when braking, the electromagnetic coil is turned on by the controller 9.
  • the power supply of the electromagnetic coil 8 generates a magnetic field, and the magnetic field magnetizes the magnetic fluid 6 in the brake power pad 5, and the magnetic field strength of the electromagnetic coil 8 is continuously increased by the controller 9, so that the specific gravity of the magnetic fluid 6 is continuously increased, so that the brake power pad is increased.
  • the specific gravity of 5 is greater than the specific gravity of the brake fluid, and the specific gravity of the brake power pad 5 is greater than the specific gravity of the brake fluid 7, so that the brake power pad 5 pushes the brake pad 11 of the brake pawl 4 downward against the elastic force of the spring 13, so that the brake pad 11 friction with the brake disc 2, the friction between the brake pad 11 and the brake disc 2 hinders the rotation of the brake disc 2; when the brake is released, the controller 9 cuts off the power of the electromagnetic coil 8, the magnetic field of the electromagnetic coil 8 disappears, the brake power pad 5
  • the specific gravity of the inner magnetic fluid 6 is restored to the original unmagnetized state, and the gravity of the brake power pad 5 is smaller than the buoyancy of the brake power pad 5 to the brake fluid 7, the brake 4 swinging and resetting under the elastic force of the spring 13, the brake pad 11 of the brake pawl 4 leaves the brake disc 2, and the brake is released; the magnetic field of the electromagnetic coil 8 is controlled by the controller 9, the specific gravity of the magnetic fluid 6 is controlled by the magnetic field, and the magnetic
  • the specific gravity of 6 controls the specific gravity of the brake power pad 5, and the brake power pad 5 is controlled to move downward by the specific gravity of the brake power pad 5, and the brake power pad 5 is moved downward to push the brake pawl 4 to brake, so as to control the brake by the controller 9. purpose.
  • the controller 9 In order to implement the control of the magnetic field strength of the electromagnetic coil 8 by the controller 9, the controller 9 outputs a constantly changing voltage to the electromagnetic coil 8, and the magnetic field strength of the electromagnetic coil 8 increases as the input voltage of the controller 9 to the electromagnetic coil 8 rises, the controller 9 The voltage supplied to the electromagnetic coil 8 is increased, the magnetic field strength of the electromagnetic coil 8 is increased, the voltage supplied from the controller 9 to the electromagnetic coil 8 is lowered, and the magnetic field strength of the electromagnetic coil 8 is decreased.
  • the varying voltage of the controller 9 output to the electromagnetic coil 8 changes The voltage ranges from 12 volts to 380 volts.
  • the brake power pad 5 is composed of a rubber seal layer 14 and a foam plastic layer 15, and the foam plastic layer 15 is sealed in the rubber seal layer 14, and the magnetic fluid 6 is sealed.
  • the brake fluid 7 is water, or the brake fluid is an emulsion of water, and the specific gravity of the brake power pad 5 is smaller than the specific gravity of the emulsion of water or water; 1.2 g / cm 3 to 20 g / cm 3; dynamic brake pad 5 is the proportion ranged from 0.9 g / cm 3 to 19 g / cm 3.
  • the brake pawl 4 includes a left brake pawl 18 and a right brake pawl 19, and a positioning gap 20 is provided between the left brake pawl 18 and the right brake pawl 19, and the brake power washer 5 is provided with a positioning boss 21 The positioning boss 21 is located at the position of the positioning gap 20.
  • the brake fluid 7 fills the brake cavity 10, and the brake fluid 7 is used to reduce the friction temperature between the brake pad 11 and the brake disc 2;
  • the outer casing 1 is provided with a heat sink 23, a brake pad 11 and a brake disc 2
  • the heat generated by the friction is transmitted to the outer casing 1 through the brake fluid, and the heat is dissipated by the outer casing 1 to reduce the temperature of the brake pad 11 and the brake disc 2 by the heat dissipation effect, and the brake pad 11 and the brake disc 2 are raised.
  • the service life is provided.
  • the non-brake state of the magnetic fluid brake drum device is: The brake power pad 5 is subjected to buoyancy of the brake fluid 7 upward, and the brake pad 11 of the brake pawl 4 has a gap with the braking surface 12 of the brake disc 2.
  • the braking state of the magnetic fluid brake drum device is: The magnetic fluid 6 of the brake power pad 5 is magnetized by the magnetic field of the electromagnetic coil 8, the specific gravity of the brake power pad 5 is increased, and the downward force of the brake power pad 5 is greater than the brake power pad 5 for braking.
  • the liquid 7 is subjected to upward buoyancy, and the brake pad 11 of the brake pawl 4 comes into contact with the braking surface 12 of the brake disc 2 to contact the friction brake.
  • the outer casing 1, the brake disc 2, the brake pawl 4 and the brake power pad 5 are made of a non-ferromagnetic material, the outer casing 1 and the brake disc. 2 is composed of an aluminum alloy, and the brake claw 4 is composed of an aluminum alloy and a ceramic abrasive.
  • the brake cavity 10 of the outer casing 1 is provided with a limiting slot 24, and the brake power pad 5 is movably fitted in the limiting slot 24 to make the brake power
  • the pad 5 rises or falls within the limiting slot 24.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

磁流体刹车鼓装置包括有外壳（1）、制动盘（2）、转动轴（3）、刹车爪（4）、刹车动力垫（5）、磁流体（6）、制动液（7）、电磁线圈（8）以及控制器（9）；利用控制器（9）控制电磁线圈（8）的磁场，利用磁场控制刹车动力垫（5）内磁流体（6）的比重，利用磁流体（6）的重力的变化来控制刹车动力垫（5）移动，利用刹车动力垫（5）移动来驱动刹车片（11）与制动盘（2）摩擦刹车，利用制动液（7）来降低刹车片（11）以及制动盘（2）的温度，提高刹车片（11）以及制动盘（2）的使用寿命。

Description

磁流体刹车鼓装置
技术领域
本发明涉及一种刹车装置， 特别是一种磁流体刹车鼓装置。 背景技术
现有的机动车以及一些设备的刹车装置， 刹车时， 利用油压装置驱动 刹车片与制动盘摩擦阻力来刹车的， 刹车的冲击力较大， 刹车片与制动盘 摩擦的温度较高，刹车片容易磨损，影响了刹车片以及制动盘的使用寿命， 同时也不利于刹车的安全。 发明内容
本发明的目的是克服现有技术的不足， 提供一种机动车以及设备使用 的磁流体刹车鼓装置， 利用控制器电磁线圈的磁场， 利用磁场控制磁流体 的比重， 利用磁流体的重力来驱动刹车片与制动盘摩擦刹车， 利用制动液 来降低刹车片以及制动盘的温度。
本发明所采用的技术方案是：磁流体刹车鼓装置包括有外壳、制动盘、 转动轴、 刹车爪、 刹车动力垫、 磁流体、 制动液、 电磁线圈以及控制器； 制动盘与转动轴固定连接， 转动轴与外壳的轴承动配合连接， 制动盘密封 于外壳的制动型腔内，制动型腔内设有制动液；刹车爪位于制动盘的上方， 刹车爪的刹车片位于制动盘制动面的对面， 刹车爪与外壳铰接， 刹车爪设 有弹簧与外壳连接， 利用弹簧的弹力拉住刹车爪， 使刹车爪的刹车片离开 制动盘的制动面； 刹车动力垫位于刹车爪的上方， 刹车动力垫内密封有磁 流体， 电磁线圈设于刹车动力垫的外部， 电磁线圈的磁力线经过磁流体， 控制器设有控制线与电磁线圈连接， 刹车动力垫的比重小于制动液的比 重， 刹车动力垫的重力小于刹车动力垫于制动液受到的浮力。
使用时， 外壳与机动车或者设备的机架固定连接， 转动轴与需要制动 的转轴固定连接； 制动时， 利用控制器接通电磁线圈的电源， 电磁线圈产 生磁场， 磁场将刹车动力垫内的磁流体磁化， 利用控制器控制电磁线圈的 磁场强度不断增加， 使磁流体的比重不断增加， 使刹车动力垫的比重大于 制动液的比重， 使刹车动力垫的比重大于制动液的比重， 使刹车动力垫克 服弹簧的弹力推动刹车爪的刹车片向下摆动， 使刹车片与制动盘摩擦， 利 用刹车片与制动盘摩擦力阻碍制动盘转动； 刹车解除时， 控制器切断电磁 线圈的电源， 电磁线圈的磁场消失， 刹车动力垫内磁流体的比重恢复到原 来未磁化的状态， 刹车动力垫的重力小于刹车动力垫于刹车液受到的浮 力， 刹车爪在弹簧的弹力作用下摆动复位， 刹车爪的刹车片离开制动盘， 刹车解除；利用控制器控制电磁线圈的磁场，利用磁场控制磁流体的比重， 利用磁流体的比重控制刹车动力垫的比重， 利用刹车动力垫的重力控制刹 车动力垫向下移动， 利用刹车动力垫向下移动推动刹车爪刹车， 以达到利 用控制器控制刹车的目的； 外壳设有散热片， 刹车片与制动盘摩擦产生的 热量经制动液传递到外壳， 热量再由外壳散发出去， 提高散热的效果， 降 低刹车片与制动盘摩擦的温度， 提高刹车片以及制动盘的使用寿命。
本发明的有益效果是： 磁流体刹车鼓装置包括有外壳、 制动盘、 转动 轴、 刹车爪、 刹车动力垫、 磁流体、 制动液、 电磁线圈以及控制器； 利用 控制器电磁线圈的磁场， 利用磁场控制刹车动力垫内磁流体的比重， 利用 磁流体的重力的变化来控制刹车动力垫移动， 利用刹车动力垫移动来驱动 刹车片与制动盘摩擦刹车， 利用制动液来降低刹车片以及制动盘的温度， 提高刹车片以及制动盘的使用寿命。 附图说明
图 1是磁流体刹车鼓装置的结构示意图；
图 2是图 1的左视图。 具体实施方式
下面结合附图对本发明进行进一步的说明：
图 1所示的磁流体刹车鼓装置的结构示意图以及图 2所示图 1的左视 图， 磁流体刹车鼓装置包括有外壳 1、 制动盘 2、 转动轴 3、 刹车爪 4、 刹 车动力垫 5、 磁流体 6、 制动液 7、 电磁线圈 8以及控制器 9; 制动盘 2与 转动轴 3固定连接， 转动轴 3的轴线与制动盘 2的轴线相同， 转动轴 3与 外壳 1动配合连接， 制动盘 2密封于外壳 1的制动型腔 10内， 制动型腔 10内设有制动液 7; 刹车爪 4位于制动盘 2的上方， 刹车爪 4的刹车片 11 位于制动盘 2制动面 12的对面， 刹车爪 4与外壳 1铰接， 刹车爪 4设有 弹簧 13与外壳 1连接， 弹簧 13为拉伸弹簧， 弹簧 13—端与外壳 1的内 连接环 16连接， 弹簧 13另一端与刹车爪 4的外连接环 17连接， 利用弹 簧 13的弹力拉住刹车爪 4， 使刹车爪 4的刹车片 11离开制动盘 2的制动 面 12 ; 刹车动力垫 5位于刹车爪 4的上方， 刹车动力垫 5内密封有磁流体 6， 电磁线圈 8设于刹车动力垫 5的外部， 电磁线圈 8的磁力线经过磁流 体 6， 控制器 9设有控制线与电磁线圈 8连接， 刹车动力垫 5的比重小于 制动液 7的比重， 刹车动力垫 5的重力小于刹车动力垫 5于制动液 7受到 的浮力， 使刹车动力垫 5悬浮于刹车爪 4的上方。 转动轴 3与外壳 1的轴 承座 21之间设有密封圈 22 , 用于减少制动液 7泄露。
磁流体刹车鼓装置的工作原理是： 使用时， 外壳 1与机动车或者设备 的机架固定连接， 转动轴 3与需要制动的转轴固定连接； 制动时， 利用控 制器 9接通电磁线圈 8的电源， 电磁线圈 8产生磁场， 磁场将刹车动力垫 5内的磁流体 6磁化，利用控制器 9控制电磁线圈 8的磁场强度不断增加， 使磁流体 6的比重不断增加，使刹车动力垫 5的比重大于制动液 Ί的比重， 刹车动力垫 5的比重大于制动液 7的比重， 使刹车动力垫 5克服弹簧 13 的弹力推动刹车爪 4的刹车片 11向下摆动，使刹车片 11与制动盘 2摩擦， 利用刹车片 11与制动盘 2摩擦力阻碍制动盘 2转动； 刹车解除时， 控制 器 9切断电磁线圈 8的电源， 电磁线圈 8的磁场消失， 刹车动力垫 5内磁 流体 6的比重恢复到原来未磁化的状态， 刹车动力垫 5的重力小于刹车动 力垫 5于刹车液 7受到的浮力， 刹车爪 4在弹簧 13的弹力作用下摆动复 位， 刹车爪 4的刹车片 11离开制动盘 2， 刹车解除； 利用控制器 9控制电 磁线圈 8的磁场， 利用磁场控制磁流体 6的比重， 利用磁流体 6的比重控 制刹车动力垫 5的比重， 利用刹车动力垫 5的比重控制刹车动力垫 5向下 移动， 利用刹车动力垫 5向下移动推动刹车爪 4刹车， 以达到利用控制器 9控制刹车的目的。
为了实施利用控制器 9控制电磁线圈 8的磁场强度， 控制器 9向电磁 线圈 8输出不断变化的电压， 电磁线圈 8的磁场强度随控制器 9向电磁线 圈 8输入电压的上升而增加， 控制器 9输送给电磁线圈 8的电压提高， 电 磁线圈 8的磁场强度增加， 控制器 9输送给电磁线圈 8的电压降低， 电磁 线圈 8的磁场强度减少。 控制器 9向电磁线圈 8输出的变化的电压， 变化 的电压的范围由 12伏至 380伏。
为了使刹车动力垫 5的比重小于制动液 7的比重， 刹车动力垫 5由橡 胶密封层 14与泡沬塑料层 15构成， 泡沬塑料层 15密封于橡胶密封层 14 内， 磁流体 6密封于泡沬塑料层 15内， 制动液 7为水， 或者， 制动液为 水的乳化液， 刹车动力垫 5的比重小于水或者水的乳化液的比重； 磁流体 6比重的变化范围为 1. 2克 /厘米 3至 20克 /厘米 3； 刹车动力垫 5的比重的 变化范围为 0. 9克 /厘米 3至 19克 /厘米 3。
为了使刹车爪 4对称刹车， 刹车爪 4包括由左刹车爪 18与右刹车爪 19， 左刹车爪 18与右刹车爪 19之间设有定位间隙 20， 刹车动力垫 5设有 定位凸台 21， 定位凸台 21位于定位间隙 20的位置。
为了提高刹车的散热效率， 制动液 7充满制动型腔 10， 利用制动液 7 降低刹车片 11与制动盘 2摩擦温度； 外壳 1设有散热片 23， 刹车片 11与 制动盘 2摩擦产生的热量经制动液 Ί传递到外壳 1， 热量再由外壳 1散发 出去， 通过散热的效果， 降低刹车片 11与制动盘 2摩擦的温度， 提高刹 车片 11以及制动盘 2的使用寿命。
磁流体刹车鼓装置的非刹车状态是： 刹车动力垫 5受到制动液 7向上 的浮力， 刹车爪 4的刹车片 11与制动盘 2的制动面 12有间隙。 磁流体刹 车鼓装置的刹车状态是： 刹车动力垫 5的磁流体 6被电磁线圈 8的磁场磁 化， 刹车动力垫 5的比重增加， 刹车动力垫 5向下的重力大于刹车动力垫 5于制动液 7受到向上的浮力，刹车爪 4的刹车片 11与制动盘 2的制动面 12接触摩擦刹车。
为了减少铁磁材料对电磁线圈 8磁场的的干扰， 其特征在于： 所述的 外壳 1、 制动盘 2、 刹车爪 4以及刹车动力垫 5为非铁磁材料构成， 外壳 1 以及制动盘 2由铝合金构成， 刹车爪 4由铝合金与陶瓷磨料构成。
为了使刹车动力垫 5位于刹车爪 4的上方， 其特征在于： 所述的外壳 1的制动型腔 10设有限位槽 24， 刹车动力垫 5动配合于限位槽 24内， 使 刹车动力垫 5于限位槽 24内上升或者下降。

Claims

权 利 要 求 书
1.磁流体刹车鼓装置， 包括有外壳 （1)、 制动盘 （2)、 转动轴 （3)、 刹车爪 （4)、 刹车动力垫 （5)、 磁流体 （6)、 制动液 （7)、 电磁线圈 （8) 以及控制器 （9); 制动盘 （2) 与转动轴 （3) 固定连接， 转动轴 （3) 与 外壳 （1) 动配合连接， 制动盘 （2) 密封于外壳 （1) 的制动型腔 （10) 内， 制动型腔 （10) 内设有制动液 （7); 刹车爪 （4) 位于制动盘 （2) 的 上方， 刹车爪（4) 的刹车片 （11)位于制动盘 （2)制动面 （12) 的对面， 刹车爪 （4) 与外壳 （1) 铰接， 刹车爪 （4) 设有弹簧 （13) 与外壳 （1) 连接， 利用弹簧 （13) 的弹力拉住刹车爪 （4)， 使刹车爪 （4) 的刹车片
(11) 离开制动盘 （2) 的制动面（12); 刹车动力垫 （5)位于刹车爪（4) 的上方， 刹车动力垫 （5) 内密封有磁流体 （6)， 电磁线圈 （8) 设于刹车 动力垫（5)的外部， 电磁线圈（8)的磁力线经过磁流体（6)， 控制器（9) 设有控制线与电磁线圈 （8) 连接；
磁流体刹车鼓装置的工作原理是： 使用时， 外壳 （1) 与机动车或者 设备的机架固定连接， 转动轴 （3) 与需要制动的转轴固定连接； 制动时， 利用控制器 （9) 接通电磁线圈 （8) 的电源， 电磁线圈 （8) 产生磁场， 磁场将刹车动力垫 （5) 内的磁流体 （6) 磁化， 利用控制器 （9) 控制电 磁线圈 （8) 的磁场强度不断增加， 使磁流体 （6) 的比重不断增加， 使刹 车动力垫 （5) 的比重大于制动液 （7) 的比重， 刹车动力垫 （5) 的比重 大于制动液 （7) 的比重， 使刹车动力垫 （5) 克服弹簧 （13) 的弹力推动 刹车爪 （4) 的刹车片 （11) 向下摆动， 使刹车片 （11) 与制动盘 （2) 摩 擦， 利用刹车片 （11) 与制动盘 （2) 摩擦力阻碍制动盘 （2) 转动； 刹车 解除时， 控制器 （9) 切断电磁线圈 （8) 的电源， 电磁线圈 （8) 的磁场 消失， 刹车动力垫 （5) 内磁流体 （6) 的比重恢复到原来未磁化的状态， 刹车动力垫 （5) 的重力小于刹车动力垫 （5) 于刹车液 （7) 受到的浮力， 刹车爪 （4) 在弹簧 （13) 的弹力作用下摆动复位， 刹车爪 （4) 的刹车片
(11) 离开制动盘 （2)， 刹车解除； 利用控制器 （9) 控制电磁线圈 （8) 的磁场， 利用磁场控制磁流体 （6) 的比重， 利用磁流体 （6) 的比重控制 刹车动力垫（5)的比重， 利用刹车动力垫（5)的比重控制刹车动力垫（5) 向下移动， 利用刹车动力垫 （5) 向下移动推动刹车爪 （4) 刹车。
2.根据权利要求 1所述的磁流体刹车鼓装置， 其特征在于： 所述的刹 车动力垫 （5) 的比重小于制动液 （7) 的比重， 刹车动力垫 （5) 的重力 小于刹车动力垫 （5) 于制动液 （7) 受到的浮力。
3.根据权利要求 2所述的磁流体刹车鼓装置， 其特征在于： 所述的控 制器 （9) 向电磁线圈 （8) 输出的变化的电压， 变化的电压的范围由 12 伏至 380伏。
4.根据权利要求 1所述的磁流体刹车鼓装置， 其特征在于： 所述的磁 流体 （6) 比重的变化范围为 1.2克 /厘米 3至 20克 /厘米 3；
5.根据权利要求 1所述的磁流体刹车鼓装置， 其特征在于： 所述的刹 车动力垫 （5) 的比重的变化范围为 0.9克 /厘米 3至 19克 /厘米 3
6.根据权利要求 1所述的磁流体刹车鼓装置， 其特征在于： 所述的制 动液 （7) 充满制动型腔 （10)， 利用制动液 （7) 降低刹车片 （11) 与制 动盘 （2) 摩擦温度。
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