阅读说明：本技术 一种自回复式电磁离合器 (Self-returning electromagnetic clutch ) 是由 俞成涛 孙月梅 叶霞 于 2019-08-20 设计创作，主要内容包括：本发明涉及电磁离合器系统,具体涉及一种自回复式电磁离合器。包括：联轴组件,联轴组件为两组,联轴组件包括联轴件和复位件,两个联轴件可轴向运动地设置在两个轴的端部并与所在轴一起转动,两个联轴件相靠近的端部为联轴端,两个联轴件在电磁驱动组件的作用下轴向相向运动,直至两个联轴端相接实现联轴；两个联轴件在所述复位件的作用下轴向分离,断开联轴；电磁驱动组件,所述电磁驱动组件被间隙装配于两组联轴组件的分界处的外周,所述电磁吸附组件通电形成磁回路,所述磁回路经过两个所述联轴件。解决了现有技术中的电磁离合器的电磁吸附组件随轴转动,而导致不利于接通外部电源,或者内置电源导致结构复杂、体积和质量增加的技术问题。(The invention relates to an electromagnetic clutch system, in particular to an automatic return type electromagnetic clutch. The method comprises the following steps: the two coupling assemblies comprise two coupling parts and a reset part, the two coupling parts are axially movably arranged at the end parts of the two shafts and rotate together with the shafts, the end parts close to the two coupling parts are coupling ends, and the two coupling parts axially move in opposite directions under the action of the electromagnetic driving assembly until the two coupling ends are connected to realize coupling; the two coupling parts are axially separated under the action of the resetting part, and the coupling is disconnected; the electromagnetic driving assembly is assembled on the periphery of the dividing position of the two groups of coupling assemblies in a clearance mode, the electromagnetic adsorption assembly is electrified to form a magnetic loop, and the magnetic loop passes through the two coupling members. The technical problems that an electromagnetic adsorption assembly of an electromagnetic clutch in the prior art rotates along with a shaft, and therefore the connection of an external power supply is not facilitated, or a built-in power supply is complex in structure and increased in size and mass are solved.)

1. A self-reversing electromagnetic clutch, comprising:

the connecting shaft assembly comprises two groups of connecting shaft assemblies (1), each connecting shaft assembly (1) comprises connecting shaft parts (11) and a reset part (12), the two connecting shaft parts (11) can be axially movably arranged at the end parts of the two shafts (3) and rotate together with the shafts (3) on which the connecting shaft parts are arranged, the end parts, close to the two connecting shaft parts (11), of the two connecting shaft parts are connecting shaft ends (111), and the two connecting shaft parts (11) axially move in the opposite direction under the action of the electromagnetic driving assembly (2) until the two connecting shaft ends (111) are connected to realize the connecting shaft; the two coupling parts (11) are axially separated under the action of the resetting part (12) to disconnect the coupling;

the electromagnetic driving assembly (2) is assembled on the periphery of the dividing position of the two sets of coupling assemblies (1) in a clearance mode, the electromagnetic adsorption assemblies (2) are electrified to form a magnetic loop, and the magnetic loop passes through the two coupling pieces (11).

2. The self-returning electromagnetic clutch according to claim 1, wherein the coupling member (11) is a coupling sleeve, the coupling member (11) is fitted over the shaft (3) and is flat-keyed to the shaft (3), the flat key groove i (113) and the flat key i (31) extend axially, and the axial length of the flat key groove i (113) is greater than that of the flat key i (31).

3. The self-returning electromagnetic clutch according to claim 2, wherein the shaft (3) is provided with a mounting groove i (30), one end of the flat key i (31) is inserted into the mounting groove i (30), the other end of the flat key i (31) extends into the flat key groove i (113), and the flat key groove i (113) is disposed on the inner peripheral surface of the coupling member (11) and extends to both axial end surfaces of the coupling member (11).

4. A self-reversing electromagnetic clutch according to any one of claims 1 to 3 in which the end faces of the two coupling ends (111) are serrated or frosted in mesh with each other.

5. The self-returning electromagnetic clutch according to claim 1, wherein the coupling assembly (1) further comprises a positioning member (13), the positioning member (13) is fixedly sleeved on the shaft (3) and is located outside the two coupling members (11), and two ends of the reset member (12) respectively act on the positioning member (13) and the coupling members (11).

6. The electromagnetic clutch of claim 5, wherein the shaft (3) has a protrusion (32) on its outer periphery, the positioning member (13) is sleeved outside the protrusion (32), the positioning member (13) is engaged with the first baffle (131) to abut against two axial ends of the protrusion (32), and the outer surface of the protrusion (32) is in flat key connection with the inner surface of the positioning member (13).

7. The electromagnetic clutch of claim 5, characterized in that the end of the positioning member (13) close to the coupling member (11) is provided with a recess opening toward the coupling member (11), the end of the coupling member (11) close to the positioning member (13) extends into the recess with a gap from the inner side wall of the recess, and the reset member (12) is accommodated in the gap.

8. The electromagnetic clutch of claim 7, wherein a second stop (112) is connected to the end of the coupling member (11) extending into the recess, the outer end of the second stop (112) extends into the gap, a third stop (132) is connected to the end of the positioning member (13) adjacent to the coupling member (11), the inner end of the third stop (132) extends into the gap, the reset member (12) is disposed parallel to the axis, and the two ends of the reset member (12) respectively act on the second stop (112) and the third stop (132).

9. The self-returning electromagnetic clutch according to claim 1, wherein the electromagnetic attraction assembly (2) includes a coil (21), a magnetic isolation ring (23), and a coil housing (22), the coil housing (22) and the magnetic isolation ring (23) cooperatively receive the coil (21), and the magnetic isolation ring (23) is located on an inner periphery of the coil (21).

10. The self-return electromagnetic clutch according to claim 1 or 9, wherein the electromagnetic adsorption assembly (2) is mounted on a frame (4), the outer circumferential surface of the electromagnetic adsorption assembly (2) is connected with the frame (4), two end covers (5) are fixedly connected to the frame (4), and the two end covers (5) are located at two axial sides of the electromagnetic adsorption assembly (2) to axially limit the electromagnetic adsorption assembly (2).

Technical Field

The invention relates to an electromagnetic clutch system, in particular to an automatic return type electromagnetic clutch.

Background

Electromagnetic clutches are also known as electromagnetic couplings. The electromagnetic mechanical connector is an automatic executing electric appliance, and is an electromagnetic mechanical connector which uses an electromagnetic induction principle and friction force between an inner friction plate and an outer friction plate to enable two components in a mechanical transmission system to rotate, and a driven component can be combined with or separated from the driving component under the condition that the driving component does not stop rotating. The electromagnetic clutch can be used for controlling the starting, reversing, speed regulating, braking and the like of machinery. It has simple structure, fast action, small control energy and convenient remote control; the volume is small, and larger torque can be transmitted; when used for brake control, the electromagnetic clutch has the advantages of rapid and smooth braking, so the electromagnetic clutch is widely applied to various processing machines and mechanical transmission systems. The electromagnetic clutch is used for transmitting the torque (or power) of the actuating mechanism from the driving shaft side to the driven shaft side. It is widely used in various mechanisms (such as transmission mechanism and various electric mechanisms in machine tool) to realize the functions of quick start, braking, forward and reverse rotation or speed regulation. The electromagnetic clutch is an important element in an automatic control system because it is easy to remotely control and is much simpler to operate than other mechanical, hydraulic or pneumatic clutches.

As disclosed in application No. CN201220687698.5, an electromagnetic clutch is disclosed, and specifically: including the frame, driving shaft and driven shaft, the driving shaft has worn the electro-magnet, driven end one side of driving shaft is connected with the friction disk, the drive end one side of driven shaft is connected with the magnetic chuck, driving shaft and driven shaft are coaxial and rotate respectively and connect in the frame, the drive end of driven shaft has the horizontal migration degree of freedom, when the electro-magnet circular telegram, the magnetic chuck that receives electromagnetic attraction on the attraction driven shaft of electromagnetic attraction is attracted by the epaxial friction disk of driving, the magnetic chuck is rotatory along with the friction disk, the motion is put through promptly, the clutch is in the engaged state, because the transmission driven shaft of moment is along with the driving shaft makes syntropy rotary motion, and increase rotary motion along with electromagnetic attraction accelerates, when the electro-magnet outage, the magnetic chuck loses attraction and the friction disk. Wherein, when the magnetic suction disc on the driven shaft is attracted by the friction disc on the driving shaft to rotate together. In the structure, the on-off of the electromagnet can be controlled to realize the connection and the separation of the clutch, but when the clutch is connected, the magnetic suction disc rotates along with the friction disc, so that the magnetic suction disc is not favorable for connecting an external power supply, or a power supply assembly is required to be arranged in the device, the structure is complex, and the volume and the mass are increased.

Disclosure of Invention

In order to solve the technical problems that an electromagnetic adsorption assembly of an electromagnetic clutch in the prior art rotates along with a shaft, so that an external power supply is not facilitated to be connected, or a built-in power supply has a complex structure and is increased in size and mass, the invention provides a self-return electromagnetic clutch, and the technical problems are solved. The technical scheme of the invention is as follows:

a self-reversing electromagnetic clutch comprising: the two coupling assemblies comprise coupling parts and reset parts, the two coupling parts can be axially movably arranged at the end parts of the two shafts and rotate together with the shafts, the end parts, close to the two coupling parts, of the two coupling parts are coupling ends, and the two coupling parts axially move in opposite directions under the action of the electromagnetic driving assembly until the two coupling ends are connected to realize coupling; the two coupling parts are axially separated under the action of the resetting part, and the coupling is disconnected; the electromagnetic driving assembly is assembled on the periphery of the dividing position of the two groups of coupling assemblies in a clearance mode, the electromagnetic adsorption assembly is electrified to form a magnetic loop, and the magnetic loop passes through the two coupling members.

Further, the coupling piece is a coupling sleeve, the coupling piece is sleeved on the shaft and is connected with the shaft flat key, the flat key groove I and the flat key I axially extend, and the axial length of the flat key groove I is larger than that of the flat key I.

Furthermore, the shaft is provided with a mounting groove I, one end of the flat key I is inserted into the mounting groove I, the other end of the flat key I extends into the flat key groove I, and the flat key groove I is arranged on the inner peripheral surface of the coupling and extends to two axial end surfaces of the coupling.

Furthermore, the end faces of the two coupling ends are in a mutually meshed sawtooth surface or a frosted surface.

Further, the shaft coupling assembly further comprises a positioning piece, the positioning piece is fixedly sleeved on the shaft and located on the outer sides of the two shaft coupling pieces, and two ends of the reset piece act on the positioning piece and the shaft coupling pieces respectively.

Furthermore, the outer peripheral surface of the shaft is provided with a protruding part, the positioning piece is sleeved outside the protruding part, the positioning piece is matched with the first baffle plate to tightly support the two axial ends of the protruding part, and the outer surface of the protruding part is connected with the inner surface of the positioning piece through a flat key.

Furthermore, one end of the positioning piece, which is close to the coupling piece, is provided with a groove with an opening facing the coupling piece, one end of the coupling piece, which is close to the positioning piece, extends into the groove and has a gap between the inner side walls of the groove, and the resetting piece is accommodated in the gap.

Further, the shaft coupling piece stretches into the one end of recess is connected with the second dog, the outer end of second dog stretches into in the clearance, the setting element is close to the one end of shaft coupling piece is connected with the third dog, and the inner of third dog stretches into in the clearance, it is on a parallel with the axis setting to reset, the both ends that reset the piece act on second dog and third dog respectively.

Further, the electromagnetic adsorption component comprises a coil, a magnetism isolating ring and a coil sleeve, the coil sleeve and the magnetism isolating ring are matched to contain the coil, and the magnetism isolating ring is located on the inner periphery of the coil.

Furthermore, the electromagnetic adsorption component is installed on the frame, the outer peripheral surface of the electromagnetic adsorption component is connected with the frame, the frame is further fixedly connected with two end covers, the two end covers are located on two axial sides of the electromagnetic adsorption component, and the electromagnetic adsorption component is axially limited.

Based on the technical scheme, the invention can realize the following technical effects:

1. the self-return electromagnetic clutch provided by the invention has the advantages that the electromagnetic adsorption component is arranged to generate a magnetic loop passing through the two coupling parts when the electromagnetic adsorption component is electrified so as to adsorb the two coupling parts to axially move in opposite directions until the two coupling parts are connected to realize coupling; when the coupling is not needed, only the electromagnetic adsorption component is controlled not to work, the two coupling parts can be kept away under the action of the reset part, and the coupling is disconnected. In the driving process, the electromagnetic adsorption component is not connected with the coupling component and the shaft, when the shaft and the coupling component on the shaft rotate, the electromagnetic adsorption component cannot rotate along with the shaft, the electromagnetic adsorption component can be conveniently connected with a power supply, and the volume and the mass can be effectively controlled;

2. according to the self-returning electromagnetic clutch, the coupling part is a coupling sleeve, and the coupling part and the shaft are connected through flat keys, so that the coupling part can rotate together with the shaft, the driving shaft can drive the coupling part on the driving shaft to rotate together, after the coupling, the coupling part on the driving shaft can drive the coupling part on the driven shaft to rotate, and the coupling part on the driven shaft drives the driven shaft to rotate, so that the driving shaft drives the driven shaft to rotate; in addition, a flat key groove and a flat key are further arranged to axially extend, and the axial length of the flat key groove is greater than that of the flat key, so that the coupling part can axially move relative to the shaft, and coupling and decoupling are realized; furthermore, the end face of the connecting shaft end of the coupling part is provided with the mutually meshed sawtooth surfaces, so that the coupling part on the driving shaft can drive the coupling part on the driven shaft to rotate after the coupling part and the driving shaft are connected, and the sawtooth on the sawtooth surface can be further provided with a plurality of evenly distributed sawteeth, so that the coupling parts can be conveniently connected correspondingly without being connected at a specific position; in addition, the end face of the connecting shaft end of the coupling piece can be arranged to be a frosted surface, so that the friction force of the connecting shaft end is increased, the two coupling pieces can rotate together, and under the condition of frosting surface, the two connecting shaft ends can be connected at any angle and can synchronously rotate;

3. the self-returning electromagnetic clutch is provided with the coupling assembly and further comprises a positioning piece, and two ends of the resetting piece act on the positioning piece and the coupling piece respectively, so that the resetting effect on the coupling piece can be realized. In addition, the positioning piece is arranged to be matched with the first baffle plate to tightly abut against two ends of the protruding portion on the shaft, so that the axial limiting of the positioning piece on the shaft is realized, the flat key connection between the protruding portion and the positioning piece is realized, the circumferential limiting of the positioning piece on the shaft is realized, and through the connecting structure, the positioning piece is not required to be installed by a fastening piece, perforation is not required, and the disassembly is convenient; a clearance for accommodating the resetting piece is formed between the positioning piece and the coupling piece, and the resetting piece can be accommodated in the clearance in a manner of being parallel to the axis by arranging the baffle plates on the positioning piece and the coupling piece, so that the resetting piece is not easy to twist; in addition, the third stop block can limit the axial moving range of the second stop block by matching with the groove;

4. the self-return electromagnetic clutch has the advantages that the electromagnetic adsorption components are arranged on the outer periphery of the boundary of the two sets of coupling components in a clearance mode, the magnetic isolation ring is arranged on the inner periphery of the coil, the coil and the coil sleeve can be prevented from forming a complete magnetic loop, the magnetic circuit needs to pass through the two coupling components, the adsorption force is generated between the two coupling components, and the two coupling components move oppositely to realize coupling.

Drawings

FIG. 1 is a schematic structural view of a self-reversing electromagnetic clutch according to the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 2;

in the figure: 1-a coupling assembly; 11-a coupling member; 111-coupling end; 112-a second stop; 113-flat keyway i; 12-a reset member; 13-a positioning element; 131-a first stop; 132-a third stop; 133-flat keyway ii; 2-an electromagnetic adsorption component; 21-a coil; 22-a coil housing; 23-a magnetism isolating ring; 3-axis; 30-mounting groove I; 31-flat bond I; 32-a boss; 321-flat bond II; 322-mounting groove II; 4-a frame; 5-end cap.

Detailed Description

The invention is further described with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the terms "radial," "axial," "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 3, the present embodiment provides a self-returning electromagnetic clutch for coupling and decoupling two shafts 3, the two shafts 3 being located on the same axis, the two shafts 3 being close to each other with a gap, the self-returning electromagnetic clutch being provided on the shaft ends of the two shafts 3 that are close to each other. The two shafts 3 are respectively a driving shaft and a driven shaft, the driving shaft rotates under the driving of the driving device, and when the self-returning type electromagnetic clutch realizes coupling, the driving shaft drives the driven shaft to rotate through the self-returning type electromagnetic clutch of the embodiment.

The self-returning electromagnetic clutch comprises two groups of coupling assemblies 1 and two groups of electromagnetic driving assemblies 2, wherein the two groups of coupling assemblies 1 are symmetrically arranged at the mutually close shaft ends of two shafts 3, the coupling assemblies 1 rotate along with the shafts 3, and the electromagnetic driving assemblies 2 generate adsorption force when being electrified so as to connect the two groups of coupling assemblies 1 and realize coupling; when the electromagnetic driving component 2 is powered off and stops working, the two groups of coupling components 1 are separated, and the coupling is disconnected.

Use the structure of a set of shaft coupling subassembly 1 as an example, shaft coupling subassembly 1 includes shaft coupling 11, reset 12 and setting element 13, shaft coupling 11 and setting element 13 are all established on axle 3, shaft coupling 11 is closer to another axle 3 than setting element 13, reset 12 is located between shaft coupling 11 and setting element 13, reset 12's both ends act on shaft coupling 11 and setting element 13 respectively, shaft coupling 11 and setting element 13 rotate together with place axle 3, setting element 13 is fixed on place axle 3, shaft coupling 11 can nevertheless do not deviate from place axle 3 for place axle 3 axial motion.

Specifically, the coupling member 11 is fitted over the shaft 3 and is flat-key-coupled to the shaft 3 so that the shaft 3 can rotate together with the coupling member 11. Further, a flat key I31 can be arranged on the shaft 3, a corresponding flat key groove I113 is arranged on the inner circumferential surface of the coupling member 11, and the flat key I31 and the flat key groove I113 are matched to realize flat key connection. Preferably, the shaft 3 is provided with a mounting groove I30, the inner end of the flat key I31 can be just inserted into the mounting groove I30, and the outer end of the flat key I31 extends into the flat key groove I113. Preferably, the flat key I31 and the flat key groove I113 extend axially, and the axial length of the flat key groove I113 is greater than that of the flat key I31, so that the shaft 3 and the coupling member 11 can move axially relative to each other; it is further preferred that the flat key grooves i 113 extend to both axial end faces of the coupling member 11, so as to facilitate the fitting of the coupling member 11 on the shaft 3. One end of the coupling member 11 close to the other shaft 3 is a coupling end 111, and the end surfaces of the two coupling ends 111 are arranged in a matching manner, so that the coupling effect can be realized when the two coupling ends 111 are connected. In this embodiment, the end surfaces of the two connecting shaft ends 111 are arranged to be sawtooth surfaces, so that the two connecting shaft ends 111 can be conveniently meshed; or the end surfaces of the two shaft connecting ends 111 are frosted surfaces, so that the friction force when the end surfaces of the two shaft connecting ends 111 are connected is increased. Preferably, the coupling member 11 is a coupling sleeve.

The positioning parts 13 are fixedly sleeved on the shaft 3, and the positioning parts 13 are positioned at two sides of the two shaft coupling parts 11. Have bellying 32 on the outer peripheral face of axle 3, setting element 13 can cover the outside at bellying 32 completely, the accessible sets up the non-cylindric of surface of bellying 32, setting element 13 hugs closely in the outside of bellying 32, realize the fixed connection between setting element 13 and the axle 3, for simple to operate, in this embodiment, the surface that sets up bellying 32 is cylindric, setting element 13 is located the outside of bellying 32 and the axial both ends of pressing from both sides tight bellying 32 are realized spacing in the axial on axle 3, the surface of bellying 32 further is connected with setting element 13 through flat key structure, it is spacing to realize that setting element 13 is circumferential on axle 3, make setting element 13 can not rotate for axle 3.

Further, the positioning member 13 cooperates with the first stopper 131 to clamp both axial ends of the protrusion 32, specifically, the inner surface of the positioning member 13 is stepped, one end of the protrusion 32 abuts against the stepped surface inside the positioning member 13, and the first stopper 131 is fixed on the positioning member 13 and compresses the other end of the protrusion 32. Preferably, the first stop 131 is fixed to an end of the positioning member 13 remote from the coupling member 11.

Furthermore, a flat key II 321 is arranged on the protruding part 32, a flat key groove II 133 is correspondingly arranged on the inner circumferential surface of the positioning member 13, and the protruding part 32 is connected with the flat key of the positioning member 13 through the cooperation of the flat key II 321 and the flat key groove II 133. Preferably, the protruding portion 32 is provided with a mounting groove II 322, the inner end of the flat key II 321 can be just inserted into the mounting groove II 322, and the outer end of the flat key II 321 extends into the flat key groove II 133. Preferably, the flat key ii 321 and the flat key groove ii 133 both extend axially, and the flat key groove ii 133 extends to two axial end surfaces of the positioning member 13, so that the positioning member 13 is conveniently sleeved on the shaft 3.

Preferably, one end of the positioning member 13 close to the coupling member 11 is provided with a groove facing the coupling member 11, one end of the coupling member 11 close to the positioning member 13 extends into the groove and has a gap with the inner side wall of the groove, and the reset member 12 is accommodated in the gap. Preferably, the gap is annular and the restoring element 12 is arranged parallel to the axial direction in the gap. Specifically, one end of the coupling member 11, which extends into the groove of the positioning member 13, is connected with a second stopper 112, the second stopper 112 is annular, the outer end of the second stopper 112 extends into the gap, preferably, the outer end of the second stopper 112 is in clearance fit with the side wall of the groove, and the inner end aperture of the second stopper 112 is not smaller than the radial distance from the groove bottom of the flat key groove i 113 to the axis. One end of the positioning member 13 close to the coupling member 11 is connected with a third stopper 132, the inner end of the third stopper 132 extends into the gap, the third stopper 132 can block the second stopper 112 to prevent the second stopper 112 from separating from the groove, and the third stopper 132 is matched with the groove to axially limit the coupling member 11.

One end of the reset element 12 acts on the second stop 112 and the other end acts on the third stop 132. Specifically, two ends of the reset element 12 may be connected to the second stopper 112 and the third stopper 132, respectively; alternatively, the opposing faces of the second stopper 112 and the third stopper 132 are formed with grooves having opposite openings, and the two ends of the reset element 12 are respectively received and abutted in the two grooves. The reset pieces 12 can be selected from, but not limited to, springs, and the number of the reset pieces 12 is 2-100, and the reset pieces are uniformly distributed in the annular gap.

The electromagnetic adsorption component 2 is arranged on the frame 4, the gap of the electromagnetic adsorption component 2 is positioned at the periphery of the boundary of the two coupling parts 11, the electromagnetic adsorption component 2 is electrified to form a magnetic loop, and the magnetic loop further adsorbs the two coupling parts 11 to move axially and oppositely through the two coupling parts 11 until the two coupling parts are connected to realize coupling. The electromagnetic adsorption component 2 comprises a coil 21, a coil sleeve 22 and a magnetism isolating coil 23, wherein the coil 21 is annular, the coil sleeve 22 and the magnetism isolating coil 23 are arranged outside the coil 21 in a surrounding mode in a matching mode, and the magnetism isolating coil 23 is arranged on the inner periphery of the coil 21. Specifically, the coil housing 22 may be composed of two parts, i.e., an L-shaped coil housing body and a coil cover plate, the coil cover plate and the coil housing body are fixedly connected to form a U-shaped coil housing, the coil 21 is accommodated in the U-shaped coil housing, and the isolation coil 23 covers the opening of the U-shaped coil housing. Due to the arrangement of the magnetic isolation ring 23, in a power-on state, a magnetic circuit generated by the coil 21 cannot form a complete magnetic circuit through the coil sleeve 22, the magnetic circuit generated by the coil 21 enters the two coupling parts 11 through the coil sleeve 22, so that the two coupling parts 11 generate axial adsorption force, and the two coupling parts 11 axially move in opposite directions until being connected to realize coupling.

Furthermore, the axial both ends of frame 4 are fixed with end cover 5, and end cover 5 compresses tightly electromagnetic adsorption component 2 and realizes electromagnetic adsorption component 2's demountable installation.

Based on the above structure, the operating principle of the self-returning electromagnetic clutch of the present embodiment is: in the initial state, the electromagnetic absorption assembly 2 is powered off, and the two coupling members 11 are separated under the action of the reset member 12.

If the two shafts 3 need to be coupled, the coil 21 of the electromagnetic adsorption component 2 is electrified, a magnetic circuit generated by the coil 21 forms a complete magnetic loop through the coil sleeve 22 and the two coupling members 11, the two coupling members 11 are attracted to axially move oppositely until the coupling ends 111 of the two coupling members 11 are connected, coupling is realized, and the driving shaft can drive the driven shaft to rotate through the two coupling members 11;

if no coupling is needed, the coil 21 of the electromagnetic absorption component 2 is powered off, the two coupling parts 11 are far away from each other under the action of the reset part 12, a gap exists, and the coupling is disconnected.

The self-returning electromagnetic clutch can realize the coupling and the decoupling of the driving shaft and the driven shaft, can still realize the coupling and the decoupling of the two shafts even if the driving shaft is in a working state, and has strong working performance; in addition, the coupling and the disconnection coupling can be realized only by controlling the on-off of the coil of the electromagnetic adsorption component, and the operation is convenient.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.