组 件包括沿径向或轴向分布磁极的永磁体，例如径向内侧为 N 极，径向外侧为S极，反之亦可；或者轴向一侧为N极，另一侧为S极。 The armature assembly includes permanent magnets with magnetic poles distributed in the radial or axial direction, for example, the N- pole in the radial direction and the S-pole in the radial direction, and vice versa; or the N-pole on one side and the S-pole on the other side . The preferred solution is radial distribution, which can minimize the electromagnetic force required by the electromagnet assembly, that is, the minimum current and the lowest energy consumption. 1 9 进行磁化，使衔铁19成为永磁体。 In this embodiment , the armature 19 becomes a permanent magnet by magnetizing the annular armature 19. In alternative embodiments, the permanent magnet structure may be a plurality of circular or annular members provided on the armature 19. The armature is mounted with the armature frame 31 by screws 23.
组 件沿轴向安装在衔铁 1 9 与衔铁架3 1 之间。 A driven wheel assembly composed of the driven wheel 18 and the model block 20 is installed between the armature 19 and the armature frame 31 in the axial direction . 可 以是过盈配合， 也可 以是其他安装方式)在转轴7上(参见图2)，以及在远离主动轮的一端处径向延伸的多个等间隔分布(圆周方向 上 ) 的径向管 1 8a 。 As shown in Figure 6-8, the driven wheel 18 has an axially extending cylindrical body for fixing (it can be an interference fit or other installation methods) on the rotating shaft 7 (see Figure 2) And a plurality of equally spaced (in the circumferential direction ) radial tubes 18a extending radially at one end remote from the driving wheel . 用 于 将 衔铁架3 1 、楔形块20通过楔块轴22安装于径向臂上。 Mounting holes are provided in the radial direction for mounting the armature frame 3 1 and the wedge block 20 on the radial arm through the wedge shaft 22. In the example shown, three radial arms are provided. However, the present invention is not limited to this, and a plurality of radial arms different from three may be provided as required.
选 地 ，从动轮18在 轴 向上可以设置为双层结构，其左侧( 靠 近主动轮一侧)设置有软磁材料制成的圆环形结构，其可以作为第二转子181；其右侧(远离主动轮一侧)设置有如上的多个径向臂18a 。 Optionally , the driven wheel 18 may be provided as a double-layer structure in the axial direction , and a left-hand side ( close to the driving wheel side) is provided with a circular ring structure made of soft magnetic material, which may serve as the second rotor 181; A plurality of radial arms 18a as described above are provided on the right side (the side away from the driving wheel) . 1 8a 可 以是与从动轮18的圆筒形主体一体设计， 也可 以是分离的部件通过焊接或其他方式与圆筒形主体固定连接在一起。 The radial arm 18a may be integrated with the cylindrical body of the driven wheel 18, or may be a separate component that is fixedly connected to the cylindrical body by welding or other means. 选 地 ，多个径向臂18a也可以是从圆筒形主体径向延伸的单个环形结构。 Alternatively , the plurality of radial arms 18a may also be a single annular structure extending radially from the cylindrical body.
1 81 的情況下，模形块20通过模块轴22收容在从动轮的双层结构之间，即在第二转子181与多个径向管18a之间。 In the case where the second rotor 181 is provided, the mold block 20 is housed between the double-layered structure of the driven wheel through the module shaft 22, that is, between the second rotor 181 and the plurality of radial tubes 18a. 1 分别设置在第二转子181的轴向两侧，其中衔铁19靠近图1中的左侧，衔铁架31靠近图1中的右侧。 In addition, the armature 19 and the armature holder 31 in the armature assembly are respectively disposed on two axial sides of the second rotor 181, wherein the armature 19 is near the left side in FIG. 1 and the armature holder 31 is near the right side in FIG. 1.
臂 20a 及楔面20b，摆臂20a通过楔块 轴 22 安装在从动轮18的径向臂 1 8a 上。 As shown in FIGS. 9-11, the mold block 20 includes a swing arm 20 a and a wedge surface 20 b. The swing arm 20 a is mounted on the radial arm 18 a of the driven wheel 18 through the wedge shaft 22 . 可 绕模块 轴 22 旋转。 The mold block 20 is rotatable about the module axis 22 . 和 过盈配合。 In this embodiment, the fitting relationship between the wedge shaft 22 and the radial arm 18 a of the driven wheel 18 and the fitting relationship between the wedge shaft 22 and the wedge block 20 may be: a interference fit and clearance fit; or b clearance fit and Clearance fit; or c clearance fit and interference fit.
1 8 的径向臂18a与楔块轴22左端沉孔冲压配合，形成模块轴对径向臂18a 的左端的止挡面。 The radial arm 18a of the driven wheel 18 and the left end of the wedge shaft 22 are punched and matched to form a stop surface of the module shaft against the left end of the radial arm 18a. 1 8 的径向臂 1 8a 配合的轴径，从而形成对从动轮右侧的止挡面。 The shaft diameter of the wedge shaft 22 and the armature frame 31 is larger than the shaft diameter of the wedge shaft 22 and the radial arm 18a of the driven wheel 18 , thereby forming a stop surface on the right side of the driven wheel. 轴 向被限位在从动轮上。 As a result, the wedge shaft is limited to the driven wheel in the axial direction . 1 也通过模块轴22安装在从动轮18(的径向臂)上，受楔块 轴 22 导向约束(模块轴22与衔铁架3 1 是间隙配合)，并能轴向往复移动。 The armature frame 31 is also mounted on the driven wheel 18 (radial arm) through the module shaft 22, and is guided and restrained by the wedge shaft 22 (the module shaft 22 and the armature frame 31 are clearance fit), and can move axially back and forth. 组 件移动至右侧(第二位置)时，衔铁抵接在从动轮的左侧，即从动轮的端面可以在轴向上对衔铁组件的移动进行限位止挡。 When the armature assembly moves to the left (first position), the armature frame 31 abuts to the right of the radial arm of the driven wheel, and when the armature assembly moves to the right (second position), the armature abuts from the The left side of the moving wheel, that is, the end face of the driven wheel, can limit and stop the movement of the armature component in the axial direction.
1 a 以及设置在环形主体外周上的多个u形拨叉3 1 b 。 As shown in FIGS. 12-14, the armature frame 31 has a ring-shaped body 3 1 a and a plurality of u-shaped forks 3 1 b provided on the outer periphery of the ring-shaped body . 杆 31b 1 及第二拨杆3 1b 2 ，第一拨杆、第二拨杆外侧面相对于转轴轴线可以是圆柱形面，也可以是平面的，第一、第二拨 杆 上与模形块的配合面31 1 、3 1 2 相对于转轴轴线为螺旋面或者斜平面，该斜平面与转 轴 的轴线相交且不垂直。 The shift fork includes a first shift lever 31b 1 and a second shift lever 3 1b 2. The outer sides of the first shift lever and the second shift lever may be cylindrical or planar with respect to the axis of the rotation axis. The mating surfaces 31 1 , 3 1 2 on the rod and the mold block are helical or inclined planes with respect to the axis of the rotation axis, and the inclined plane intersects and is not perpendicular to the axis of the rotation axis. In a preferred embodiment, the mating surface is a spiral surface.
组 件被驱动沿轴向方向移动时，配合面推动装在楔块轴22上的模形块20，这种推动力存在与圆周方向相切的力分量，使得模形块绕模块轴旋转，即 将 衔铁 组 件的轴向运动转换成模形块圆周方向的旋转运动，从而使模形块20的模面与主动轮2的 内 圆筒形表面摩擦接合或者分离。 When the armature assembly is driven to move in the axial direction, the mating surface pushes the mold block 20 mounted on the wedge shaft 22. This driving force has a force component tangential to the circumferential direction, so that the mold block surrounds the module axis. Rotation, that is , the axial movement of the armature component is converted into a rotational movement in the circumferential direction of the mold block, so that the mold surface of the mold block 20 and the inner cylindrical surface of the driving wheel 2 are frictionally engaged or separated.
选地，楔块20上设置有外形呈圆 柱 形或弧形的金属箍20c，金属箍20c一体或装配设置在楔块20上，用以与衔铁架3 1 的配合面31 1 、3 1 2 相配合，减少摩擦，使配合更加顺畅。 Optionally , the wedge block 20 is provided with a cylindrical or arc-shaped metal hoop 20c, and the metal hoop 20c is integrally or assembled on the wedge block 20 to be used with the mating surfaces 31 1 and 3 of the armature frame 31 . 1 2 matching, reduce friction and make the cooperation smoother.
- 3 示出了电磁离合器的组装状态，单幅构件3与主动轮配合安装，从而在电磁离合器的一侧形成封单。 Figure 2-3 shows the assembled state of the electromagnetic clutch. The single-frame member 3 is installed in cooperation with the driving wheel to form a seal on one side of the electromagnetic clutch. The mutual assembly of the various components can be performed by known means, which will not be described in detail here.
The operation of the electromagnetic clutch according to the present invention is described below with reference to FIG. 1.
/ 断电时，衔铁组件的轴向运动。 First , the axial movement of the armature assembly when the electromagnet assembly is turned on / off is described . 组 件通第一方向电流，电磁铁组件的极性与衔铁组件的永磁体的极性相反/相吸，作 用 在衔铁组件上。 When a current is passed to the electromagnet assembly in the first direction, the polarity of the electromagnet assembly is opposite / attractive to the polarity of the permanent magnet of the armature assembly , and acts on the armature assembly. Therefore, under the action of the electromagnetic force, the armature 19 and the armature frame 31 installed together move against the force of the elastic member to the first position, preferably the release position of the clutch.
组 件中的永磁铁会与软磁材料制成的第一转子2b相吸合 。 When the armature assembly is moved to the left (first position), the permanent magnet in the armature assembly will attract the first rotor 2b made of soft magnetic material . 也 可以是具有机械接触的磁力吸合。 The pull-in is a magnetic pull-up with a gap. In other embodiments, corresponding to other clutch structures, the pull-in may be a magnetic pull-in with mechanical contact. 组 件由于自身永磁体与第一转子的软磁材料相吸，因此，即使关闭电磁铁的电流，仅通过衔铁组件的永磁体与第一转子的软磁材料的磁性吸合力作用 也可 以 将 衔铁 组 件保持在第一位置，或者 可 以通过向电磁体 组 件通减小的电流就可以将衔铁组件保持在第一位置。 Because the armature component attracts the soft magnetic material of the first rotor, even if the current of the electromagnet is turned off, only the magnetic attraction force of the permanent magnet of the armature component and the soft magnetic material of the first rotor can be used. The armature assembly is held in the first position, or the armature assembly can be held in the first position by passing a reduced current to the electromagnet assembly .
组 件通与第一方向相反的第二方向的电流时，电磁铁组件所形成的磁场的极性与衔铁组件的永磁铁极性相同 / 相斥，电磁铁组件排斥 / 推动衔铁 组 件向右侧移动。 When a current in a second direction opposite to the first direction is passed to the electromagnet assembly , the polarity of the magnetic field formed by the electromagnet assembly is the same as / repellent to the permanent magnet of the armature assembly , and the electromagnet assembly repels / pushes the armature. The component moves to the right. 用 下，使衔铁组件向右侧(第二位置，按合位置)移动。 The armature component is moved to the right (second position, pressing position) under the combined effect of the electromagnetic force and the elastic member . 组 件与第一转子之间的磁性吸合力可以忽略，衔铁组件 可 以仅在弹性件的作 用 下保持在右侧。 At this time, the gap between the armature component and the first rotor increases, the magnetic attraction force between the armature component and the first rotor can be ignored, and the armature component can be maintained on the right side only by the action of the elastic member . At this time, the power supply to the electromagnet can be stopped to reduce energy consumption. When a second rotor is provided on the driven wheel, the second rotor may be made of a soft magnetic material. When the armature component moves to the right, it engages with the second rotor. The attraction can be a magnetic attraction with mechanical contact, or a magnetic attraction with a gap. 性 件对衔铁 组 件的作用力共同作用更加确保将衔铁组件保持在右侧位置(第二位置)。 The combined force of the armature component and the second rotor and the force of the elastic member on the armature component further ensure that the armature component is maintained in the right position (second position).
通 过车载继电器直接控制电磁线圈32中的电流方向来控制电磁铁的磁极。 By integrating a control component, such as a counting commutator, on the socket 28 , the direction of the current in the electromagnetic coil 32 can also be controlled directly by the on-board relay to control the magnetic pole of the electromagnet.
上 ，在本实用新型创造中，电磁铁组件通过与永磁体相同或相反的磁极极性直接对含有永磁体的衔铁组件施加相斥或相吸磁性作用力，不需要像现有专利那样克服永磁体对衔铁组件的作用力或者抵消永磁体的磁场。 As mentioned above , in the creation of the utility model, the electromagnet assembly directly applies a repulsive or attracting magnetic force to the armature assembly containing the permanent magnet through the same or opposite magnetic pole polarity as the permanent magnet, and does not need to be overcome like the existing patent The force of the permanent magnet on the armature component or cancels the magnetic field of the permanent magnet. 用 新型的电磁铁组件中的电流的大小可以降低至现有技术中电流的约一半。 Therefore, in the creation of the present invention, the force of the electromagnet assembly can be greatly reduced. Compared with the electromagnetic clutch disclosed in the aforementioned Japanese Patent Publication and the U.S. Patent, the magnitude of the current in the electromagnet assembly of the present invention can be reduced to About half of the current in the prior art. 可 以无需电磁铁作用力(或仅需很小作用力)即可以保持在相应的位置，即可以停止对电磁铁的供电(或仅需很小电流)， 可 以大幅减少能耗，即大电流脉冲的作用时间很短， 可 以以秒计算 。 At the same time, after the armature component is moved to the left or right, the armature component can be maintained in the corresponding position without the force of the electromagnet (or only a small force), that is, the power supply to the electromagnet can be stopped (or Only a small current is required), which can greatly reduce energy consumption, that is, the action time of a large current pulse is very short, which can be calculated in seconds . Compared to the minutes of action time of the electromagnet in the prior art, the action time of the electromagnet assembly in the present invention is shortened by two orders of magnitude, which greatly reduces the possibility of heating the electromagnet.
组 件通/断电时，随着衔铁 组 件的轴向运动，从动轮组件的运动。 The following describes the movement of the driven wheel assembly with the axial movement of the armature assembly when the electromagnet assembly is turned on / off .
当向电磁铁组件通与第一方向相反的第二方向的电流使得使衔铁组件向右侧(第二位置，接合位置)移动时，衔铁组件(衔铁19与衔铁架31)带动位于衔铁组件的衔铁19与衔铁架31之间的从动轮组件沿轴向向第二位置运动。  When a current in a second direction opposite to the first direction is passed to the electromagnet assembly to move the armature assembly to the right (second position, engagement position), the armature assembly (armature 19 and armature frame 31) drives the The driven wheel assembly between the armature 19 and the armature frame 31 of the armature assembly moves axially toward the second position. 1 对模形块20的金属箍20c施加与圆周方向相切的作用力，使得模形块20绕模块轴22旋转，楔块轴的轴线与转轴轴线相平行。 When the armature frame 31 moves to the second position in the axial direction, the mating surface 31 of the second lever 31b2 of the u-shaped fork of the armature frame 31 exerts a tangential effect on the metal hoop 20c of the mold block 20 in the circumferential direction. The force causes the mold block 20 to rotate about the module axis 22, and the axis of the wedge axis is parallel to the axis of the rotation axis. At this time, the wedge surface of the mold block 20 and the inner surface friction surface of the cylindrical wall 2 a of the driving wheel 2 are rotated in the direction in which the module shaft 22 is used as the rotation axis. 1 的配合面311的推动力相同方向的来自主动轮2的圆筒形壁2a的 内 表面的摩擦作用力，使模形块20与离合器主动轮2的圆筒形壁2a的内表面保持楔入式接合，并将二者之间的摩擦力通过模块轴22推动从动轮18从而传递旋转动力至转轴。 When the die surface of the wedge block 20 comes into frictional contact with the inner surface of the cylindrical wall 2a of the driving wheel 2, the die block 20 will receive the driving force from the driving wheel 2 in the same direction as the pushing force of the mating surface 311 of the armature frame 31. The frictional force of the inner surface of the cylindrical wall 2a keeps the mold block 20 and the inner surface of the cylindrical wall 2a of the clutch driving wheel 2 in a wedged engagement, and passes the frictional force between the two through the module shaft 22 pushes the driven wheel 18 to transmit the rotational power to the rotating shaft. 轴 线的连线以及模形块旋转 轴 线与转轴 轴 线的连线呈一个夹角，且该模入式结合不是自锁式结合。 The mold-in combination refers to the connection between the joint of the mold surface of the mold block and the inner surface of the cylindrical wall of the driving wheel and the rotation axis of the mold block, and the connection line of the rotation axis of the mold block and the axis of the rotation axis . An angle is included, and the die-fitting joint is not a self-locking joint.
The second lever 31b2 (the lever that engages the mold block with the driving wheel) is designed as an elastic member, so that the mating surface 311 can better fit the mold block 20. 1 b2 的弹性变形可以使多个(在图示实例中为三个)模形块与带轮的压力 基 本一制。 The elastic deformation of the second shift lever 3 1 b2 can make the pressure of a plurality of (three in the illustrated example) mold blocks and the pulley basically uniform. / 安装公差的原因，模形块与带轮的接合有先有后，则 可 以通过第二拨杆的弹 性 变形使三个模形块基本同步的与带轮内表面结合。 Assume that due to manufacturing tolerances / installation tolerances, the mold block and the pulley are connected first, then the three deformation blocks can be basically synchronized with the inner surface of the pulley through the elastic deformation of the second lever. .
1 的配合面3 1 2 推动模形块20以模块轴22为旋转轴线向使楔形块20的楔面与主动轮2的圆筒形壁2a的内表面分离的方向转动，从而使模面与主动轮2的圆筒形壁2a的内表面分离，实现主动轮与从动轮的旋转动力的分离功能，使得主动轮相对于从动轮空转。 When the armature frame 31 is driven to move toward the first position along with the armature assembly, the mating surface 3 1 2 of the first lever 31b 1 of the armature frame 31 pushes the mold block 20 with the module shaft 22 as the rotation axis toward the wedge block 20. The wedge surface is rotated in a direction separated from the inner surface of the cylindrical wall 2a of the driving wheel 2, so that the mold surface is separated from the inner surface of the cylindrical wall 2a of the driving wheel 2, so as to realize the rotational power of the driving wheel and the driven wheel. The separation function makes the driving wheel idle with respect to the driven wheel.
/ 旋转方向，同样可以实现衔铁组件在轴向第一位置及第二位置移动时，使模形块与主动轮的圆筒形壁的内表面的接合或者分离。 Instead, in other embodiments, the armature frame may be provided on the left side of the driven wheel together with the armature. By setting the inclination / rotation direction of the mating surface of the fork correspondingly, the armature assembly may also be in the first axial position. When the second position is moved, the mold block is engaged or separated from the inner surface of the cylindrical wall of the driving wheel.
。 The elastic member 30 as the second position holder of the driven portion applies a force to the armature component in a direction away from the first rotor in the axial direction, so that after the current of the electromagnet component is disconnected, the elastic member 30 can be driven by the driven portion. Drive back to the second position where the armature component (specifically, the armature 19) is disconnected from the electromagnetic component . 也 可以片形弹簧，或者波形弹簧。 The elastic member may be a coil spring, a leaf spring, or a wave spring. 也可 以依据需要设置为一个，也可以是多个叠加或者分散设置。 The number can also be set to one as required, or it can be multiple overlapping or scattered settings. 组 件，也可以是偏压衔铁组件。 The mode of action can be a tension armature component or a biased armature component. 轴 的端部或后面描述的第二转子的端面，另一端偏压在衔铁组件的衔铁架上。 In this embodiment, the elastic member is a coil spring or a plurality of axially superimposed wave springs, one end of which is biased at the end of the rotating shaft or the end face of the second rotor described later, and the other end of which is biased at the armature of the armature assembly. Shelf. In other embodiments, the elastic member may also be a plurality of scattered coil springs, with one end abutting on the driven wheel and the other end abutting on the armature assembly. Of course, a leaf spring widely used in the technical field may also be adopted, and the specific manner is not described again.
可 以采用现有技术的其它结构，代替本实用新型上述拨叉—模形块结构。 For the driven part, other structures in the prior art may be adopted instead of the shift fork-mold block structure of the present invention. 1 45448.X 的卷绕线圈以及如日本专利公开J P 特 开2007-205513的滚珠式结构。 For example, Chinese Patent Application Publication CN200980 1 45448.X winding coils and ball-type structures such as Japanese Patent Publication No. 2007-205513.
When the solenoid fails, the pump may stop working and the engine temperature rises. 温 度时，永磁体磁性降低或消失，进而引起衔铁组件的永磁体与第一转子的软磁材料之间的相互吸引作用力或者与被施加有减小的第一电流的电磁铁产生的磁场与衔铁组件的永磁体之间的吸引作用力降低或消失，进而弹性件向衔铁组件施加的作用力使衔铁组件向第二位置运动；当永磁体的衔铁组件恢复到设计温度时，其磁 性 可以恢复，或者磁序恢复，并由电磁铁组件对永磁体进行充磁，即永磁体是非永久 性 失磁的材料，在衔铁组件的永磁体的磁性或者磁力恢复至设计值后，电磁离合器仍然可以正常工作。 When the armature assembly containing the permanent magnet rises to the Curie point under the influence of the heat transmitted by the water pump, that is, when the ambient temperature of the armature assembly reaches the design demagnetization temperature , the magnetism of the permanent magnet decreases or disappears, which causes the permanent magnet The mutual attraction force between the soft magnetic materials of the first rotor or the magnetic field generated by the electromagnet to which the reduced first current is applied and the permanent magnet of the armature component is reduced or disappeared, and the elastic member is further reduced. The force applied to the armature component moves the armature component to the second position; when the permanent magnet armature component returns to the design temperature, its magnetism can be restored, or the magnetic sequence is restored, and the permanent magnet is magnetized by the electromagnet component That is, the permanent magnet is a non-permanent demagnetization material. After the magnetism or magnetic force of the permanent magnet of the armature component is restored to the design value, the electromagnetic clutch can still work normally.
地 ，如本实 用 新型示例性实施例中那样，将衔铁组件和从动部分构造成当衔铁组件位于第二位置(衔铁组件的吸合被断开)时，从动部分的 ， 楔形块与主动轮的 内 表面楔合。 Taking this into consideration, it is preferable to configure the armature assembly and the driven portion as in the exemplary embodiment of the present invention, when the armature assembly is in the second position (the pull-in of the armature assembly is disconnected), In the moving part , the wedge block is wedged with the inner surface of the driving wheel . 性 件对衔铁组件的作用力时，衔铁组件向右侧(第二位置)移动，使楔形块20沿着使其模面与主动轮2的圆筒形壁2a的内表面接合的方向转动，使模形块与主动轮的圆筒形壁2a的内表面保持楔入式接合，并将二者之间的摩擦力通过模块轴22推动从动轮 1 8 从而将旋转动力传递至转轴， 以正常驱动水泵 工 作， 进而实现电磁离合器的安全有效。 Therefore, when the attraction force of the armature component and the first rotor or the sum of the attraction force of the armature component and the first rotor and the force of the electromagnet on the armature component is less than the force of the elastic member on the armature component, the armature component is to the right (Second position) Move the wedge-shaped block 20 in a direction in which its die surface is engaged with the inner surface of the cylindrical wall 2a of the driving wheel 2 to move the wedge-shaped block 20 to the inside of the cylindrical wall 2a of the driving wheel The surface remains wedged in engagement, and the frictional force between the two pushes the driven wheel 18 through the module shaft 22 to transmit the rotating power to the rotating shaft to drive the water pump normally , thereby achieving the safety and effectiveness of the electromagnetic clutch.
用 新型中，可以采用弹力较小的弹性件30，这样向电磁铁通较小的电流即可将衔铁组件吸引向左移动，电磁铁不容易发热。 In the present utility model, an elastic member 30 having a small elastic force can be used, so that a small current can be drawn to the electromagnet to move the armature component to the left, and the electromagnet is not easy to generate heat.
用 新型中，由于以模块轴为旋转轴向使模形块沿着使其模面与离合器主动轮的圆筒形壁2a的 内 表面接触的方向转动，当楔块的楔面(摩擦面)与离合器主动轮的圆筒形壁2a的内表面接触后，楔块会受到与衔铁架的配合面(优选为螺旋面)推动力相同方向的、来白主动轮的圆筒形壁2a的内表面的摩擦作 用 力，使楔块与高合器主动轮的 内 表面保持模入式接合；并且，离合器传递的扭矩越大，楔块与主动轮之间就越紧，传递的扭矩就越大。 In addition, in the present invention , since the module shaft is used as the rotation axis, the mold block is rotated in a direction in which its mold surface is in contact with the inner surface of the cylindrical wall 2a of the clutch driving wheel. After the surface (friction surface) is in contact with the inner surface of the cylindrical wall 2a of the clutch driving wheel, the wedge will be subjected to the driving force of the mating surface (preferably a spiral surface) of the armature frame, which is the cylinder from which the driving wheel is white. The frictional force of the inner surface of the shaped wall 2a keeps the wedge block and the inner surface of the driving wheel of the coupling close to each other; and the greater the torque transmitted by the clutch, the tighter the wedge block and the driving wheel, The greater the transmitted torque. As long as the transmitted torque is not greater than that causing structural damage to the two, the clutch will not fail to transmit. By virtue of such structural features, even if there is water or oil between the friction surface between the wedge and the driving wheel, the friction coefficient is severely reduced, the clutch can transmit the design needs due to the wedging effect Of torque.
用 的包含永磁体的衔铁在电磁力作用下与安装在一起的衔铁架位于接合位置(第一位置)或分离位置(第二位置)时，在电磁力消失后，均由于自身永磁体与周边铁磁性元件(软磁材料)相吸而能够保持所处位置不变，从而实现位置保持功能，可以使电磁铁的工作时间大为缩短。 When the armature containing permanent magnets, which is affected by the electromagnetic force of the electromagnet, is located at the engaged position (first position) or the separated position (second position) with the armature frame installed together under the effect of the electromagnetic force, both Since the permanent magnet attracts the surrounding ferromagnetic element (soft magnetic material), it can keep the position unchanged, thereby achieving the position maintaining function, which can greatly reduce the working time of the electromagnet. As long as the armature can be pushed or pulled to the engaged position or disengaged position, the power can be cut off, so that the electromagnetic coil windings of the clutch can be energized for a very short time, without the disadvantage of reducing the function of the electromagnet due to heat generation.