WO2014106448A1 - 磁流体刹车鼓 - Google Patents

磁流体刹车鼓 Download PDF

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Publication number
WO2014106448A1
WO2014106448A1 PCT/CN2013/091192 CN2013091192W WO2014106448A1 WO 2014106448 A1 WO2014106448 A1 WO 2014106448A1 CN 2013091192 W CN2013091192 W CN 2013091192W WO 2014106448 A1 WO2014106448 A1 WO 2014106448A1
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WO
WIPO (PCT)
Prior art keywords
brake
magnetic fluid
fluid
pawl
outer casing
Prior art date
Application number
PCT/CN2013/091192
Other languages
English (en)
French (fr)
Inventor
杨国辉
Original Assignee
Yang Guohui
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yang Guohui filed Critical Yang Guohui
Priority to CN201380032770.8A priority Critical patent/CN104718395A/zh
Publication of WO2014106448A1 publication Critical patent/WO2014106448A1/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
    • F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
    • F16D63/002—Brakes with direct electrical or electro-magnetic actuation
    • 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
    • F16D2065/782—Features relating to cooling the brake-actuating fluid being used as a coolant
    • 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
    • F16D2065/783—Features relating to cooling cooling control or adjustment
    • 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

Definitions

  • the invention relates to a brake device, in particular to a magnetic fluid brake drum. 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 easily worn, which affects the service life of the brake pads and the brake discs.
  • the object of the present invention is to overcome the deficiencies of the prior art, and provide a magnetic fluid brake drum used 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.
  • the sheet 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 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 rotating shaft
  • the fixed connection, 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, the brake cavity is provided with brake fluid;
  • the brake pawl is located above the brake disc, the brake of the brake pawl
  • the piece is located on the opposite side of the braking surface of the brake disc, the brake claw is hinged to the outer casing, and 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 claw is separated 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
  • 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. Magnetization of the magnetic fluid inside, 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, so that the specific gravity of the brake power pad is greater than that of the brake fluid.
  • the spring force of the spring pushes the brake pad of the brake pawl to swing downward, so that the brake pad rubs against the brake disc, and the friction between the brake pad and the brake disc hinders the rotation of the brake disc; when the brake is released, the controller cuts off the power of the electromagnetic coil.
  • the magnetic field of the electromagnetic coil disappears, and the specific gravity of the magnetic fluid in the brake power pad is restored to the original unmagnetized state.
  • the gravity of the brake power pad is smaller than the buoyancy of the brake power pad on the brake fluid, and the brake pawl is swung and reset under the spring force of the brake.
  • the brake pads of the claws leave the brake disc, and the brakes are released; the magnetic field of the electromagnetic coil is controlled by the controller, the specific gravity of the magnetic fluid is controlled by the magnetic field, the specific gravity of the brake power pad is controlled by the specific gravity of the magnetic fluid, and the braking power is controlled by the gravity of the brake power pad.
  • the pad moves downward, using the brake power pad to move downward to push the brake pawl brake, and the controller controls the brake; the outer casing is provided with a heat sink, and the temperature at which the low brake pad rubs against the brake disc.
  • the magnetic fluid brake drum 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;
  • the magnetic field is used to control the specific gravity of the magnetic fluid in the brake power pad, 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 pad.
  • the brake pads and the service life of the brake disc are increased.
  • Figure 1 is a schematic view showing the structure of a magnetic fluid brake drum
  • Figure 2 is a left side view of Figure 1. detailed description
  • FIG. 1 is a schematic view showing the structure of the magnetic fluid brake drum
  • FIG. 2 is a left side view of FIG. 1.
  • the magnetic fluid brake drum includes a casing 1, a brake disk 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 pad 11 of the brake pawl 4 is located.
  • 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
  • the inner end of the spring 13 is connected to the inner ring 16 of the outer casing 1. Connection, the other end of the spring 13 is connected to the outer connecting ring 17 of the brake pawl 4, and the spring 13 is used.
  • the brake pawl 4 is pulled to move the brake pad 11 of the brake pawl 4 away from the braking surface 12 of the brake disc 2; the brake power pad 5 is located above the brake pawl 4, and the brake fluid pad 5 is sealed with a magnetic fluid 6, an electromagnetic coil 8 is disposed outside the brake power pad 5, the magnetic flux of the electromagnetic coil 8 passes through the magnetic fluid 6, and the controller 9 is provided with a control line connected to the electromagnetic coil 8.
  • the specific gravity of the brake power pad 5 is smaller than the specific gravity of the brake fluid.
  • 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 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 improve the heat dissipation effect, reduce the temperature of the brake pad 11 and the brake disc 2, and increase the brake pad 11 and the brake disc 2
  • the service life is provided.
  • the non-brake state of the magnetic fluid brake drum 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 brake surface 12 of the brake disc 2.
  • the braking state of the magnetic fluid brake drum 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 the brake fluid 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 washer 5 are made of a non-ferromagnetic material, and the outer casing 1 and the brake disc 2 are made of an aluminum alloy, and the brake is applied.
  • the 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, so that the brake power pad 5 is in the limiting slot 24 Rise or fall inside.

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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
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。 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。 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， 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， 使刹车动力垫悬浮于刹车爪的上方。
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， 利用控制 器控制刹车； 外壳设有散热片， 低刹车片与制动盘摩擦的温度。
本发明的有益效果是： 磁流体刹车鼓包括有外壳、 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的结构示意图以及图 2所示图 1的左视图， 磁流体刹车鼓包括有外壳 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 Ί 的比重。 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。
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， 提高散热的效果， 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 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， 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， 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， 其特征在于： 所述的磁流体刹车鼓包括有外壳（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， 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。
2.根据权利要求 1所述的磁流体刹车鼓， 其特征在于： 所述的刹车动 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 （7) 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。
3.根据权利要求 1所述的磁流体刹车鼓，其特征在于：所述的弹簧（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。
4.根据权利要求 1所述的磁流体刹车鼓， 其特征在于： 所述的刹车爪 (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。
5.根据权利要求 1所述的磁流体刹车鼓， 其特征在于： 所述的磁流体 刹车鼓的非刹车状态是： 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。
6.根据权利要求 1所述的磁流体刹车鼓， 其特征在于： 所述的磁流体 刹车鼓的刹车状态是： 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。
7.根据权利要求 1所述的磁流体刹车鼓， 其特征在于： 所述的转动轴 (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。
8.根据权利要求 1所述的磁流体刹车鼓，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。
9.根据权利要求 1所述的磁流体刹车鼓，其特征在于：所述的外壳（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
(7) 传递到外壳 （1)， 热量再由外壳 （1) 散发出去。
10.根据权利要求 1 所述的磁流体刹车鼓， 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。
PCT/CN2013/091192 2013-01-03 2013-12-31 磁流体刹车鼓 WO2014106448A1 (zh)

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