WO2022042475A1 - 可靠性高的电磁失电制动器 - Google Patents

可靠性高的电磁失电制动器 Download PDF

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Publication number
WO2022042475A1
WO2022042475A1 PCT/CN2021/114045 CN2021114045W WO2022042475A1 WO 2022042475 A1 WO2022042475 A1 WO 2022042475A1 CN 2021114045 W CN2021114045 W CN 2021114045W WO 2022042475 A1 WO2022042475 A1 WO 2022042475A1
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WO
WIPO (PCT)
Prior art keywords
iron core
armature
cover plate
hole
brake
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PCT/CN2021/114045
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English (en)
French (fr)
Inventor
杨海燕
杨俊�
周章军
Original Assignee
浙江英洛华赫兹电气有限公司
诸暨市奇灵机电设备有限公司
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Application filed by 浙江英洛华赫兹电气有限公司, 诸暨市奇灵机电设备有限公司 filed Critical 浙江英洛华赫兹电气有限公司
Publication of WO2022042475A1 publication Critical patent/WO2022042475A1/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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • 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
    • 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 an electromagnetic power-off brake with high reliability.
  • the working principle of the electromagnetic de-energized brake is that when the coil is energized, the coil winding is energized to generate a magnetic force, so that the armature is sucked back against the force of the spring, and the brake disc can rotate freely; when the coil winding is de-energized, the magnetic force of the coil winding disappears, and the armature is pulled back.
  • the spring pushes against the brake disc, and friction force is generated between the brake disc and the armature through the friction plate to prevent the brake disc from rotating so as to play a braking effect.
  • the electromagnetic power-off brake with this structure When the electromagnetic power-off brake with this structure is assembled with the rotor, especially the outer rotor of the motor, it may be caused by the machining accuracy of the matching part between the rotor and the brake disc. After the moving disc and the rotor are assembled, it may cause the non-parallel between the brake disc, the armature and the cover plate, so that the friction plate cannot be in parallel contact with the armature and the cover plate, and the contact surface is reduced, so that sufficient friction torque cannot be provided. This will lead to problems such as poor braking performance or even failure of the electromagnetic power-off brake.
  • the purpose of the present invention is to provide a method that is not affected by the manufacturing accuracy of the motor rotor, can ensure parallel contact between the friction plate, the armature and the cover plate, can provide sufficient friction torque, has good braking performance, and has fast response speed and reliability. High electromagnetic de-energized brake.
  • a highly reliable electromagnetic power-off brake including,
  • cover plate the cover plate and the iron core are fixed to each other, and are supported by several equal height columns between the cover plate and the iron core;
  • the armature is interposed between the iron core and the cover plate, the armature has a through hole matching the outer diameter of the equal-height column and is slidably connected between the iron core and the cover plate, and the other ends of the several compression springs are connected to one end face of the armature. offset;
  • a brake disc is interposed between the armature and the cover plate.
  • the brake disc is provided with a friction plate hole for the friction plate to penetrate.
  • the thickness of the brake disc is smaller than that of the friction plate, and the friction plate is loosely fitted on the
  • the upper and lower end faces of the friction sheet in the hole of the friction sheet and the friction sheet play a role of friction respectively protrude from the two end faces of the brake disc;
  • the friction plate can slide slightly in the friction plate hole to ensure that when the armature, the brake disc and the cover plate are pressed tightly, the friction plate can always be in contact with the cover plate and the armature. Maintain parallel contact and provide enough friction to ensure the braking performance of the electromagnetic power-off braking, so as to eliminate the friction between the brake disc, the armature and the cover plate caused by the manufacturing accuracy of the rotor brake disc mounting part during the assembly of the brake disc and the rotor. The non-parallel between the friction plates and the armature and the cover plate cannot be in parallel contact.
  • the thickness of the brake disc is smaller than the thickness of the friction plate. On the one hand, it can ensure that the upper and lower end faces of the friction plate play a friction role, respectively, protruding from the two end faces of the brake disc. There will be friction with the iron and the cover plate.
  • the friction sheet has an arc-shaped strip structure
  • the friction sheet hole is a circular arc strip-shaped structure that is loosely fitted with the friction sheet.
  • the arc-shaped strip-shaped friction plate and the friction plate hole can ensure that the friction force is along the circumferential direction, so that the direction of the friction force is perpendicular to the radius, that is, the force arm, so as to obtain the maximum braking torque.
  • the brake disc has a large central through hole, the plurality of equal height columns are located in the large central through hole, the brake disc can rotate on the periphery of the equal height column, and the periphery of the large central through hole forms a ring part, the friction plate hole is located in the annular part.
  • the invention makes the brake disc in a hollow structure through the arrangement of the large central hole, and the hollow brake disc can rotate freely on the outside of several equal-height columns without interference.
  • the brake disc and the cover plate are close together, so as to compress the armature, the friction plate and the cover plate, so that the two end faces of the friction plate rub against the armature and the cover plate respectively, and the friction plate transmits the friction torque to the brake through the friction plate hole.
  • the disc restricts the rotation of the brake disc, thereby realizing the braking of the rotor of the motor connected to the brake disc.
  • the present invention is particularly suitable for braking of external rotor motors.
  • the friction plate is located on the outer side of the equal-height column and away from the central axis of the electromagnetic power-off brake.
  • the brake with the same outer diameter can obtain a larger braking torque, thereby providing better braking performance and response performance, and making the electromagnetic power-off brake Miniaturized and lightweight.
  • the structure arrangement that the friction plate is loosely fitted in the friction plate hole can make the matching gap between the friction plate, the armature and the cover plate not affected by the machining accuracy of the external connecting parts, and ensure that the friction plate, the armature and the cover plate can be in parallel contact, so that The reliability of braking is guaranteed.
  • a mounting hole for mounting and fixing is formed in the center of the iron core, and the mounting hole has a key groove.
  • the installation hole in the center of the iron core and the keyway can be used to match with the inner stator shaft of the outer rotor motor to realize the installation and fixation of the present invention.
  • the outer edge of the brake disc extends outward to form a horn body, and the end of the horn body forms a connecting disc for installing the brake disc; the horn body is provided with a number of circumferentially evenly arranged cutout holes.
  • the arrangement of the horn body axially extends the installation position of the brake disc, which facilitates the connection between the present invention and the motor rotor, thereby improving the versatility; and the hollow hole on the horn body can reduce the overall size of the present invention. weight, thereby reducing the moment of inertia and improving braking performance.
  • both ends of the iron core are provided with threading holes for the lead wires of the coil winding to pass through, and the armature and the cover plate are provided with through holes corresponding to the threading holes of the iron core for the lead wires to pass through.
  • the present invention can be connected and installed through any one of the two ends, so as to facilitate the installation and fixation of the present invention.
  • the armature is provided with a first through hole coaxial with the iron core
  • the cover plate is provided with a second through hole coaxial with the iron core, so as to facilitate the passage of the fixed shaft during installation.
  • the iron core is provided with an annular slot for accommodating the coil winding, so as to facilitate the arrangement and positioning of the coil winding, and make the structure of the present invention more compact.
  • the iron core is provided with a spring groove for accommodating the compression spring, so as to provide good positioning and support for the compression spring.
  • the iron core and the cover plate are fixed by screws, and the screws are threaded with the iron core after passing through the equal-height column from the cover plate, so as to ensure the relative position between the iron core and the cover plate.
  • the stability of the contour column ensures the flexibility of the armature sliding.
  • the invention has the advantages of better braking performance, faster response speed, smaller volume and weight, lower manufacturing cost and the like.
  • Fig. 1 is a kind of exploded structure schematic diagram of the present invention
  • Fig. 2 is the left side view of Fig. 1;
  • Fig. 3 is A-A sectional view of Fig. 1;
  • Fig. 4 is the right side view of Fig. 1;
  • Fig. 5 is the B-B sectional view of Fig. 4;
  • FIG. 6 is a schematic structural diagram of Embodiment 2 of the present invention.
  • the iron core 1 is provided with an annular groove 3 for accommodating the coil winding 2
  • the iron core 1 is provided with a plurality of springs for accommodating the compression spring 4 .
  • Slot 5 the coil winding 2 is arranged in the annular slot 3
  • one end of the compression spring 4 is embedded in the spring slot 5 of the iron core
  • the cover plate 6 and the iron core 1 are fixed to each other, and the cover plate 6 and the iron core 1 pass through three.
  • the iron core 1 and the cover plate 6 are fixed by screws 8, and the screws 8 pass through the equal height columns 7 from the cover plate 6 and are threadedly matched with the iron core 1.
  • the armature 9 is interposed between the iron core 1 and the cover plate 6.
  • the armature 9 has a through hole 10 that matches the outer diameter of the equal height column 7 and is slidably connected between the iron core 1 and the cover plate 6.
  • the other end of the compression spring 4 is connected to the cover plate 6.
  • the brake disc 11 has a large central through hole 12, and three equal height columns 7 are located in the large central through hole 12,
  • the brake disc 11 can rotate on the periphery of the equal-height column 7, the periphery of the large central through hole 12 forms a circular ring portion 13, and the circular ring portion 13 of the brake disc 11 is provided with a friction sheet hole 23 for the friction sheet to penetrate,
  • the thickness of the brake disc 11 is smaller than the thickness of the friction plate 14 , the friction plate 14 is loosely fitted in the friction plate hole 23 and the upper and lower end surfaces of the friction plate play a friction role respectively protruding from the two end surfaces of the brake disc 11 .
  • the friction plate 14 has an arc-shaped strip structure, and the friction plate hole 23 is an arc-shaped strip structure that is loosely matched with the friction plate.
  • the outer edge of the brake disc 11 is formed with a horn body 17 extending outward, and the end of the horn body 17 is formed with a connecting disc 18 for installing the brake disc.
  • the center of the iron core 1 is formed with a mounting hole 15 for mounting and fixing, the mounting hole 15 has a key slot 16, both ends of the iron core 1 are provided with threading holes 20 for the lead wires of the coil winding to pass through, and the armature and the cover plate are provided with Corresponds to the through hole for the lead wire to pass through the wire hole of the iron core.
  • the armature 9 is provided with a first through hole 21 coaxial with the iron core, and the cover plate 6 is provided with a second through hole 22 coaxial with the iron core 1 .
  • the setting of the large central hole makes the brake disc in a hollow structure, and the hollow brake disc can rotate freely on the outside of several equal-height columns without interference.
  • the disc and the cover plate are close together, so as to compress the friction pad between the armature and the brake disc and the friction pad between the brake disc and the cover plate to limit the rotation of the brake disc, so as to realize the Braking of the rotor of the connected motor.
  • the present invention is especially suitable for the braking of the outer rotor motor. When applied, the brake disc can be driven and connected to the outer rotor of the outer rotor motor through the connecting plate 18 of the horn body, and the rotor iron core can be fixed to the inner stator shaft of the outer rotor motor. .
  • the friction plate of the present invention is far away from the central axis of the electromagnetic power-off brake, and the brake with the same outer diameter can obtain a larger braking torque, thereby providing better braking performance and response performance, and miniaturizing the electromagnetic power-off brake. , lightweight.
  • the iron core 1 is provided with an annular slot 3 for accommodating the coil winding 2
  • the iron core 1 is provided with a plurality of spring slots 5 for accommodating the compression spring 4
  • the coil winding 2 is arranged in the annular slot 3
  • one end of the compression spring 4 is embedded in the spring groove 5 of the iron core
  • the cover plate 6 and the iron core 1 are fixed to each other, and are supported by three equal height columns 7 between the cover plate 6 and the iron core 1, and the iron core 1 and the cover
  • the plates 6 are fixed by screws 8, and the screws 8 pass through the equal-height columns 7 from the cover plate 6 and are threadedly matched with the iron core 1.
  • the armature 9 is interposed between the iron core 1 and the cover plate 6.
  • the armature 9 has a through hole 10 that matches the outer diameter of the equal height column 7 and is slidably connected between the iron core 1 and the cover plate 6.
  • the other end of the compression spring 4 is connected to the cover plate 6.
  • the brake disc 11 has a large central through hole 12, and three equal height columns 7 are located in the large central through hole 12,
  • the brake disc 11 can rotate on the periphery of the equal-height column 7, the periphery of the large central through hole 12 forms a circular ring portion 13, and the circular ring portion 13 of the brake disc 11 is provided with a friction sheet hole 23 for the friction sheet to penetrate,
  • the thickness of the brake disc 11 is smaller than the thickness of the friction plate 14 , the friction plate 14 is loosely fitted in the friction plate hole 23 and the upper and lower end surfaces of the friction plate play a friction role respectively protruding from the two end surfaces of the brake disc 11 .
  • the friction plate 14 has an arc-shaped strip structure, and the friction plate hole 23 is an arc-shaped strip structure that is loosely matched with the friction plate.
  • the center of the iron core 1 is formed with a mounting hole 15 for mounting and fixing, and the mounting hole 15 has a key slot 16. Both ends of the iron core 1 are provided with threading holes 20 for the leads of the coil winding to pass through.
  • the armature and the cover plate There are through holes through which the lead wires pass through corresponding to the through holes of the iron core.
  • the armature 9 is provided with a first through hole 21 coaxial with the iron core, and the cover plate 6 is provided with a second through hole 22 coaxial with the iron core 1 .

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

Abstract

一种电磁失电制动器，包括盖板（6），盖板（6）与铁芯（1）相互固定，在盖板（6）与铁芯（1）之间通过若干等高柱（7）支撑；衔铁（9）介于铁芯（1）和盖板（6）之间，衔铁（9）具有与等高柱（7）外径相配的通孔（10）并滑动连接在铁芯（1）与盖板（6）之间，若干压缩弹簧（4）的另一端与衔铁（9）的一个端面相抵；制动盘（11），介于衔铁（9）和盖板（6）之间，制动盘（11）上设有供摩擦片（14）穿透的摩擦片孔（23），制动盘（11）的厚度小于摩擦片（14）的厚度，摩擦片（14）松配在摩擦片孔（23）内且摩擦片（14）起到摩擦作用的上下两个端面分别凸出于制动盘（11）的两个端面；当线圈绕组（2）通电时，制动盘（11）在衔铁（9）和盖板（6）之间自由转动；当线圈绕组（2）失电时，摩擦片（14）的上下两个端面分别与盖板（6）及衔铁（9）压紧摩擦接触。如此设置可保证摩擦片与衔铁及盖板之间能平行接触，能提供足够的摩擦力矩，制动性能好，响应速度较快，可靠性高。

Description

可靠性高的电磁失电制动器 技术领域
本发明涉及一种可靠性高的电磁失电制动器。
 背景技术
电磁失电制动器的工作原理是通电时，线圈绕组通电产生磁力使衔铁克服弹簧作用力被吸回，此时制动盘可自由转动；当线圈绕组失电时，线圈绕组的磁力消失，衔铁被弹簧顶向制动盘，制动盘与衔铁之间通过摩擦片产生摩擦力以阻止制动盘转动从而起到制动作用。
现有的电磁制动器多将摩擦片固定在制动盘表面，这种结构的电磁失电制动器与转子尤其是电机外转子装配时，可能会应转子与制动盘配合部位的加工精度问题，制动盘与转子装配后可能会造成制动盘与衔铁及盖板之间不平行，从而造成摩擦片与衔铁及盖板之间不能平行接触，接触面减小，从而不能提供足够的摩擦力矩，继而造成电磁失电制动器制动性能较差甚至失效等问题。
 技术问题
本发明的目的是提供一种不受电机转子制造精度的影响，可保证摩擦片与衔铁及盖板之间能平行接触，能提供足够的摩擦力矩，制动性能好，响应速度较快可靠性高的电磁失电制动器。
 技术解决方案
为实现上述目的，本发明采用如下技术方案：可靠性高的电磁失电制动器，包括，
一盖板，盖板与铁芯相互固定，在盖板与铁芯之间通过若干等高柱支撑；
所述衔铁介于铁芯和盖板之间，衔铁具有与等高柱外径相配的通孔并滑动连接在铁芯与盖板之间，所述若干压缩弹簧的另一端与衔铁的一个端面相抵；
一制动盘，介于衔铁和盖板之间，所述制动盘上设有供摩擦片穿透的摩擦片孔，制动盘的厚度小于摩擦片的厚度，摩擦片松配在所述摩擦片孔内且所述摩擦片起到摩擦作用的上下两个端面分别凸出于制动盘的两个端面；
当线圈绕组通电时，制动盘在衔铁和盖板之间自由转动；
当线圈绕组失电时，所述摩擦片的上下两个端面分别与盖板及衔铁压紧摩擦接触。
将摩擦片松配在制动盘的摩擦片孔内，摩擦片可以在摩擦片孔内小幅滑动，保证衔铁、制动盘和盖板三者压紧时，摩擦片能始终与盖板及衔铁保持平行接触，提供足够的摩擦力以保证电磁失电制动的制动性能，从而消除制动盘与转子装配时由于转子制动盘安装部制造精度问题造成制动盘与衔铁及盖板之间的不平行从而造成摩擦片与衔铁及盖板之间不能平行接触的问题。其中制动盘的厚度小于摩擦片的厚度，一方面可保证摩擦片起到摩擦作用的上下两个端面分别凸出于制动盘的两个端面，另一方面可靠的保证了制动盘不会与衍铁和盖板产生摩擦。
作为优选，所述摩擦片呈圆弧形的条带状结构，所述摩擦片孔呈与摩擦片松配的圆弧形的条带状结构。圆弧形的条带状结构的摩擦片及摩擦片孔可保证摩擦力沿圆周方向，使摩擦力的方向与半径即力臂垂直，从而获得最大的刹车力矩。
作为优选，所述制动盘具有一大中心通孔，所述若干等高柱位于该大中心通孔内，制动盘可在等高柱外围转动，该大中心通孔的外围形成圆环部，所述摩擦片孔位于圆环部。本发明通过大中心孔的设置使制动盘呈中空结构，中空的制动盘在若干等高柱外侧可自由转动，不受干涉，只有当铁芯失电时，压缩弹簧推动衍铁使衔铁、制动盘和盖板三者靠拢，从而压紧衔铁、摩擦片及盖板，使摩擦片的两个端面分别与衔铁及盖板摩擦，摩擦片则通过摩擦片孔传递摩擦力矩给制动盘限制制动盘的转动，从而可实现与制动盘相连电机的转子的制动。本发明尤其适用与外转子电机的制动。摩擦片位于等高柱外侧远离电磁失电制动器的中心轴，同样外径的制动器本发明结构能获得更大的制动力矩，从而提供更好的制动性能和响应性能，使电磁失电制动器小型化，轻量化。而摩擦片松配在摩擦片孔内的结构设置则可以使摩擦片与衔铁、盖板之间配合间隙不受外部连接部件的加工精度影响，保证摩擦片与衔铁及盖板能平行接触，从而保证了制动的可靠性。
作为优选，所述铁芯中心形成有用于安装固定的安装孔，所述安装孔具有键槽。铁芯中心的安装孔配合键槽可用以与外转子电机的内定子轴相互匹配从而实现本发明的安装固定。
作为优选，所述制动盘的外缘向外延伸形成有喇叭体，所述喇叭体的端部形成用于安装制动盘的连接盘；所述喇叭体上设有若干个周向均匀布置的镂空孔。其中，喇叭体的设置将制动盘的安装位置进行轴向延伸，方便与本发明与电机转子之间的连接，从而提高通用性；而其中喇叭体上的镂空孔则可以减少本发明的整体重量，从而减少转动惯量，提高制动性能。
作为优选，所述铁芯的两端均设有供线圈绕组的引线穿过的穿线孔，所述衔铁及盖板设有与铁芯的穿线孔对应的供引线穿过的通孔。使本发明通过两端的任意一端都可以进行连线和安装，从而便于本发明的安装固定。
作为优选，所述衔铁设有与铁芯同轴的第一通孔，所述盖板设有与铁芯同轴的第二通孔，从而便于安装时固定轴的穿过。
作为优选，所述铁芯设有用于容设线圈绕组的环形槽，从而便于线圈绕组的设置和定位，使本发明结构更为紧凑。
作为优选，所述铁芯设有用于容设压缩弹簧的弹簧槽，从而起到对压缩弹簧的良好定位和支撑。
作为优选，所述铁芯与盖板之间通过螺钉固定，所述螺钉自盖板穿过所述等高柱后与铁芯相互螺纹配合，从而保证铁芯与盖板之间的相对位置及等高柱的稳定，保证衔铁滑动的灵活性。
 有益效果
本发明具有制动性能较好，响应速度较快，体积和重量较小，制造成本较低等优点。
 附图说明
图1为本发明的一种分解结构示意图；
图2为图1的左侧视图；
图3为图1的A-A剖视图；
图4是图1的右侧视图；
图5是图4的B-B剖视图；
图6是本发明实施例2的一种结构示意图。
 本发明的最佳实施方式
在此处键入本发明的最佳实施方式描述段落。
 本发明的实施方式
实施例 1 ：
下面根据附图和具体实施例对本发明作进一步描述。
由图1、图2、图3、图4和图5所示，铁芯1设有用于容设线圈绕2的环形槽3，铁芯1设有多个用于容设压缩弹簧4的弹簧槽5，线圈绕组2设于环形槽3内，压缩弹簧4的一端嵌于铁芯的弹簧槽5内，盖板6与铁芯1相互固定，在盖板6与铁芯1之间通过三个等高柱7支撑，铁芯1与盖板6之间通过螺钉8固定，螺钉8自盖板6穿过等高柱7后与铁芯1相互螺纹配合。
衔铁9介于铁芯1和盖板6之间，衔铁9具有与等高柱7外径相配的通孔10并滑动连接在铁芯1与盖板6之间，压缩弹簧4的另一端与衔铁9的一个端面相抵；制动盘11介于衔铁9和盖板6之间，该制动盘11具有一大中心通孔12，三个等高柱7位于该大中心通孔12内，制动盘11可在等高柱7外围转动，该大中心通孔12的外围形成圆环部13，制动盘11的圆环部13上设有供摩擦片穿透的摩擦片孔23，制动盘11的厚度小于摩擦片14的厚度，摩擦片14松配在摩擦片孔23内且摩擦片起到摩擦作用的上下两个端面分别凸出于制动盘11的两个端面。摩擦片14呈圆弧形的条带状结构，摩擦片孔23呈与摩擦片松配的圆弧形的条带状结构
制动盘11的外缘向外延伸形成有喇叭体17，喇叭体17的端部形成用于安装制动盘的连接盘18，喇叭体17上设有三个周向均匀布置的镂空孔19。
铁芯1的中心形成有用于安装固定的安装孔15，安装孔15具有键槽16，铁芯1的两端均设有供线圈绕组的引线穿过的穿线孔20，衔铁和盖板均设有与铁芯的穿线孔对应供引线穿过的通孔。衔铁9设有与铁芯同轴的第一通孔21，盖板6设有与铁芯1同轴的第二通孔22。
大中心孔的设置使制动盘呈中空结构，中空的制动盘在若干等高柱外侧可自由转动，不受干涉，只有当铁芯失电时，压缩弹簧推动衍铁使衔铁、制动盘和盖板三者靠拢，从而压紧衔铁与制动盘之间的摩擦片及压紧制动盘与盖板之间的摩擦片，限制制动盘的转动，从而可实现与制动盘相连电机的转子的制动。本发明尤其适用与外转子电机的制动，应用时，可将制动盘通过喇叭体的连接盘18与外转子电机的外转子传动连接，将转子铁芯与外转子电机的内定子轴固定。本发明的摩擦片远离电磁失电制动器的中心轴，同样外径的制动器本发明结构能获得更大的制动力矩，从而提供更好的制动性能和响应性能，使电磁失电制动器小型化，轻量化。
实施例2：
如图6所示，铁芯1设有用于容设线圈绕2的环形槽3，铁芯1设有多个用于容设压缩弹簧4的弹簧槽5，线圈绕组2设于环形槽3内，压缩弹簧4的一端嵌于铁芯的弹簧槽5内，盖板6与铁芯1相互固定，在盖板6与铁芯1之间通过三个等高柱7支撑，铁芯1与盖板6之间通过螺钉8固定，螺钉8自盖板6穿过等高柱7后与铁芯1相互螺纹配合。
衔铁9介于铁芯1和盖板6之间，衔铁9具有与等高柱7外径相配的通孔10并滑动连接在铁芯1与盖板6之间，压缩弹簧4的另一端与衔铁9的一个端面相抵；制动盘11介于衔铁9和盖板6之间，该制动盘11具有一大中心通孔12，三个等高柱7位于该大中心通孔12内，制动盘11可在等高柱7外围转动，该大中心通孔12的外围形成圆环部13，制动盘11的圆环部13上设有供摩擦片穿透的摩擦片孔23，制动盘11的厚度小于摩擦片14的厚度，摩擦片14松配在摩擦片孔23内且摩擦片起到摩擦作用的上下两个端面分别凸出于制动盘11的两个端面。摩擦片14呈圆弧形的条带状结构，摩擦片孔23呈与摩擦片松配的圆弧形的条带状结构
铁芯1的中心形成有用于安装固定的安装孔15，安装孔15具有键槽16，铁芯1的两端均设有供线圈绕组的引线穿过的穿线孔20，，所述衔铁及盖板设有与铁芯的穿线孔对应的供引线穿过的通孔。衔铁9设有与铁芯同轴的第一通孔21，盖板6设有与铁芯1同轴的第二通孔22。

Claims (10)

  1. 一种可靠性高的电磁失电制动器，包括铁芯、衔铁、设于铁芯内的线圈绕组及一端嵌于铁芯内的若干压缩弹簧，其特征在于：
    包括，
    一盖板，盖板与铁芯相互固定，在盖板与铁芯之间通过若干等高柱支撑；
    所述衔铁介于铁芯和盖板之间，衔铁具有与等高柱外径相配的通孔并滑动连接在铁芯与盖板之间，所述若干压缩弹簧的另一端与衔铁的一个端面相抵；
    一制动盘，介于衔铁和盖板之间，所述制动盘上设有供摩擦片穿透的摩擦片孔，制动盘的厚度小于摩擦片的厚度，摩擦片松配在所述摩擦片孔内且所述摩擦片起到摩擦作用的上下两个端面分别凸出于制动盘的两个端面；
    当线圈绕组通电时，制动盘在衔铁和盖板之间自由转动；
    当线圈绕组失电时，所述摩擦片的上下两个端面分别与盖板及衔铁压紧摩擦接触。
  2. 根据权利要求1所述的可靠性高的电磁失电制动器，其特征在于所述摩擦片呈圆弧形的条带状结构，所述摩擦片孔呈与摩擦片松配的圆弧形的条带状结构。
  3. 根据权利要求1或2所述的可靠性高的电磁失电制动器，其特征在于所述制动盘具有一大中心通孔，所述若干等高柱位于该大中心通孔内，制动盘可在等高柱外围转动，该大中心通孔的外围形成圆环部，所述摩擦片孔位于圆环部。
  4. 根据权利要求1或2所述的可靠性高的电磁失电制动器，其特征在于所述铁芯中心形成有用于安装固定的安装孔，所述安装孔具有键槽。
  5. 根据权利要求1或2所述的可靠性高的电磁失电制动器，其特征在于所述制动盘的外缘向外延伸形成有喇叭体，所述喇叭体的端部形成用于安装制动盘的连接盘。
  6. 根据权利要求4所述的可靠性高的电磁失电制动器，其特征在于所述喇叭体上设有若干个周向均匀布置的镂空孔。
  7. 根据权利要求1或2所述的可靠性高的电磁失电制动器，其特征在于所述铁芯的两端均设有供线圈绕组的引线穿过的穿线孔，所述衔铁及盖板设有与铁芯的穿线孔对应的供引线穿过的通孔。
  8. 根据权利要求1或2所述的可靠性高的电磁失电制动器，其特征在于所述衔铁设有与铁芯同轴的第一通孔，所述盖板设有与铁芯同轴的第二通孔。
  9. 根据权利要求1或2所述的可靠性高的电磁失电制动器，其特征在于所述铁芯设有用于容设线圈绕组的环形槽。
  10. 根据权利要求1或2所述的可靠性高的电磁失电制动器，其特征在于所述铁芯设有用于容设压缩弹簧的弹簧槽。
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