CN221075434U - Electromagnetic assembly with adjustable output thrust - Google Patents

Abstract

The utility model discloses an electromagnetic assembly with adjustable output thrust, which comprises a mounting main body, a contact moving assembly, a coil and an adjusting component, wherein the contact moving assembly comprises an armature and a connecting piece, the coil can be electrified to apply electromagnetic force to the armature to push the armature and the connecting piece to integrally move so as to apply thrust to a valve core, the adjusting component comprises an adjusting assembly and a counter thrust applying piece, the counter thrust applying piece can be elastically deformed to apply counter thrust to the contact moving assembly when the contact moving assembly is driven by the coil to move, and the adjusting assembly can be moved to aggravate or slow down deformation of the counter thrust applying piece so as to adjust the counter thrust applied by the counter thrust applying piece to the contact moving assembly. The output thrust of the utility model is adjustable to ensure that the output thrust is kept within the range of expected errors, and the adjusting mode is simple, so that the cost is effectively reduced compared with the existing adjusting mode.

Description

Electromagnetic assembly with adjustable output thrust

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic assembly with adjustable output thrust.

Background

After the coil of the electromagnetic valve is electrified, the armature is driven to move so as to drive the push rod connected with the armature to apply thrust to the valve core. Wherein the magnitude of the thrust force output by the pushrod depends on the voltage and current of a given coil. When it is desired to regulate the output thrust of the push rod, it is often necessary to provide additional electrical components on the line in communication with the coils to regulate the current or voltage of a given coil, but this increases the overall cost.

In addition, due to the influences of materials, technology, size, parameter errors and other factors of the coil and the armature, when the voltage or current of the coil is constant, the output thrust difference of push rods of the electromagnetic valves in the same batch is relatively large, and the situation that the output thrust of part of push rods deviates from the expected error range can occur, so that the qualification rate is relatively low.

Disclosure of utility model

One advantage of the utility model is that an electromagnetic assembly with adjustable output thrust is provided, and the output thrust is adjustable, so that the output thrust is ensured to be kept within an expected error range, and the production qualification rate is effectively improved.

The electromagnetic assembly has the advantages that the electromagnetic assembly with the adjustable output thrust is provided, the output thrust is adjustable, the adjusting mode is simple, and compared with the existing adjusting mode, the cost is effectively reduced.

To achieve at least one of the above advantages, the present utility model provides an output thrust adjustable electromagnetic assembly mounted to a valve spool, the output thrust adjustable electromagnetic assembly comprising:

The installation main body is provided with an installation space and a through hole communicated with the installation space;

A contact assembly mounted in the mounting space and capable of being driven to move along the mounting space in a direction toward or away from the through opening, the contact assembly including an armature mounted to the connecting member and a connecting member connected to the valve core at an end of the mounting space adjacent to the through opening;

A coil magnetically connected to the armature, the coil being mounted to the mounting body, the coil being capable of being energized to apply electromagnetic force to the armature to urge the armature and the connector to move integrally within the mounting space in a direction toward the through-hole to apply thrust to the valve core;

The adjusting component is arranged in the installation space and is positioned on one side of the installation space away from the through hole, the adjusting component comprises an adjusting component and a reverse thrust applying piece, the reverse thrust applying piece is arranged between the adjusting component and the connecting piece, the reverse thrust applying piece can be elastically deformed to apply reverse thrust to the touch moving component when the touch moving component is driven by the coil to move towards the through hole in the installation space, and the adjusting component can move along the installation space in a direction towards or away from the through hole to intensify or slow down the deformation of the reverse thrust applying piece so as to adjust the reverse thrust applied by the reverse thrust applying piece to the touch moving component and adjust the output thrust of the touch moving component in cooperation with the coil.

According to an embodiment of the utility model, the connecting piece comprises a connecting body and a connecting part, the connecting body is mounted on the armature and extends towards the direction of the adjusting component and the through hole, the connecting part is mounted on the side part of the connecting body, and the reverse thrust applying piece is positioned between the connecting part and the adjusting component.

According to an embodiment of the present utility model, the back-thrust-applying member is directed toward the adjusting member near an end of the through hole, the back-thrust-applying member is directed toward the connecting portion away from the end of the through hole, the back-thrust-applying member is compressed when the electromagnetic force generated by energizing the contact moving member with the coil moves toward the through hole to the installation space, the back-thrust-applying member is further compressed to increase the back thrust applied by the adjusting member to the contact moving member when the adjusting member is forced to move away from the through hole to the installation space, thereby reducing the output thrust of the contact moving member, and the degree to which the back-thrust-applying member is compressed is reduced to reduce the thrust applied by the back-thrust-applying member to the contact moving member when the adjusting member is forced to move toward the through hole to the installation space, thereby increasing the output thrust of the contact moving member.

According to an embodiment of the present utility model, the mounting body includes a first portion and a second portion, the first portion is mounted on the second portion and forms the mounting space together with the second portion, the through hole is formed in the second portion, the adjusting component is screwed into the first portion, the adjusting component can extend or retract into the mounting space at an end of the first portion away from the second portion, the adjusting component can rotate relative to the first portion by an external force and move outside the connecting body, so as to adjust the counter thrust of the counter thrust applying component acting on the contact moving component after the contact moving component is electrified by the coil to generate electromagnetic force.

According to an embodiment of the present utility model, the portion of the first portion screwed with the adjusting component is hard pressed to deform the internal thread thereof and form at least one resistance increasing groove on the surface.

According to an embodiment of the present utility model, the adjusting component and an end portion of the first portion on the same side as an end of the first portion remote from the second portion form a stress structure, and the stress structure can be matched with a screwing tool to transmit torque through the screwing tool so as to drive the adjusting component to rotate.

According to an embodiment of the present utility model, the adjusting assembly includes an adjusting body and an abutment, the force receiving structure is formed on the adjusting body, the adjusting body is movably mounted in the mounting space, the back thrust applying member is located between the abutment and the connecting portion, the abutment is detachably connected to the adjusting body, and the connecting portion is detachably connected to the connecting body.

According to an embodiment of the present utility model, the connection portion and the connecting piece are both sleeved on the connection body, the electromagnetic assembly with adjustable output thrust further includes two shift-preventing rings, the adjustment body has a communication hole communicating with the installation space, one shift-preventing ring is detachably sleeved on the connection body, the other shift-preventing ring is detachably mounted on an inner wall of the adjustment body forming the communication hole, the shift-preventing ring mounted on the connection body is abutted with the connection portion and can be driven by the connection body to push the connection portion to move together when the armature is energized by the coil to move toward the through hole, and the shift-preventing ring mounted on the adjustment body is abutted with the connecting piece and can be driven by the adjustment body to push the connecting piece to move together when the adjustment body moves away from the through hole.

According to an embodiment of the present utility model, the electromagnetic assembly with adjustable output thrust further includes a sealing assembly including at least a first sealing member mounted between the adjustment body of the adjustment assembly and the first portion of the mounting body, the first sealing member being used to seal the adjustment body with the first portion.

According to an embodiment of the present utility model, the electromagnetic assembly with adjustable output thrust further includes an emergency member mounted on an outer side of the connection body, and the emergency member is capable of being moved by an external force to push the connection body to move toward the through hole.

Drawings

Fig. 1 shows a schematic structural view of an electromagnetic assembly with adjustable output thrust according to the present utility model.

Fig. 2 is a sectional view showing a structure of the electromagnetic assembly of the present utility model in which the output thrust is adjustable in a state.

Fig. 3 is a cross-sectional view showing a structure of another state of the electromagnetic assembly with adjustable output thrust according to the present utility model.

Fig. 4 is a cross-sectional view showing a structure of another state of the electromagnetic assembly with adjustable output thrust according to the present utility model.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

Referring to fig. 1 to 4, an output thrust adjustable solenoid assembly according to a preferred embodiment of the present utility model will be described in detail below, the output thrust adjustable solenoid assembly being mounted to a spool to which thrust can be applied.

The electromagnetic assembly with adjustable output thrust comprises a mounting body 10 and a touch assembly 20, wherein the mounting body 10 is provided with a mounting space 101 and a through hole 102 communicated with the mounting space 101. The touch assembly 20 is mounted to the mounting space 101, and the touch assembly 20 can be driven to move along the mounting space 101 in a direction toward or away from the through hole 102.

Referring to fig. 2 to 4, the contact assembly 20 includes an armature 21 and a connecting member 22, the armature 21 is mounted on the connecting member 22, and the connecting member 22 is connected to the valve core at an end portion of the mounting space 101 near the through hole 102. The electromagnetic assembly with adjustable output thrust comprises a coil 30, and the armature 21 is magnetically connected to the coil 30. The coil 30 is mounted to the mounting body 10, and the coil 30 can be energized to apply electromagnetic force to the armature 21 to push the armature 21 and the connector 22 to move integrally within the mounting space 101 in a direction toward the through-hole 102 to apply thrust to the spool.

Referring to fig. 2 to 4, the electromagnetic assembly with adjustable output thrust further includes an adjusting member 40, wherein the adjusting member 40 is mounted in the mounting space 101 and located on a side of the mounting space 101 away from the through hole 102. The adjustment member 40 comprises an adjustment assembly 41 and a counter-thrust applicator 42, the counter-thrust applicator 42 being mounted between the adjustment assembly 41 and the connector 22. The counterthrust applicator 42 is capable of being elastically deformed to apply a counterthrust to the contact moving assembly 20 when the contact moving assembly 20 is driven by the coil 30 to move toward the through hole 102 in the installation space 101. The adjusting component 41 can move along the installation space 101 in a direction towards or away from the through hole 102 to intensify or slow down the deformation of the counter thrust applying component 42 so as to adjust the counter thrust applied by the counter thrust applying component 42 to the touch component 20, so as to cooperate with the coil 30 to adjust the output thrust of the touch component 20, thereby ensuring that the output thrust is kept within an expected error range and effectively improving the production yield. In addition, the adjusting mode is simple, and compared with the existing adjusting mode, the cost is effectively reduced.

Preferably, the counter-thrust applicator 42 is embodied as a spring.

Referring to fig. 2 to 4, the connecting piece 22 includes a connecting body 221 and a connecting portion 222, and the connecting body 221 is mounted to the armature 21 and extends in a direction in which the regulating member 40 and the through hole 102 are located. The connection portion 222 is mounted to a side portion of the connection body 221, and the thrust back application member 42 is located between the connection portion 222 and the adjustment assembly 41.

Preferably, an end of the counterthrust applicator 42 adjacent the port 102 faces the adjustment assembly 41, and an end of the counterthrust applicator 42 remote from the port 102 faces the connection 222. The counterthrust applicator 42 is compressed when the electromagnetic force generated by the contact assembly 20 energized by the coil 30 moves in the mounting space 101 toward the through-opening 102. When the adjusting component 41 is moved away from the through hole 102 by an external force to move in the installation space 101, the counter thrust applying component 42 is further compressed to increase the counter thrust applied by the counter thrust applying component to the touch component 20, so as to reduce the output thrust of the touch component 20; when the adjusting member 41 is moved toward the through hole 102 by an external force to move in the installation space 101, the degree to which the counter thrust applying member 42 is compressed is reduced to reduce the counter thrust applied to the tactile member 20, thereby increasing the output thrust of the tactile member 20.

As a matter of deformability, an end of the counterthrust applicator 42 near the through-opening 102 faces the connecting portion 222, and an end of the counterthrust applicator 42 remote from the through-opening 102 faces the adjustment assembly 41. The back force applying member 42 is stretched when the electromagnetic force generated by the contact assembly 20 energized by the coil 30 moves in the installation space 101 toward the through hole 102. When the adjusting component 41 is moved away from the through hole 102 by an external force to move in the installation space 101, the counter thrust applying component 42 is further stretched to increase the counter thrust applied by the counter thrust applying component to the touch component 20, so as to reduce the output thrust of the touch component 20; when the adjusting member 41 is moved toward the through hole 102 by an external force to move in the installation space 101, the degree to which the back thrust applying member 42 is stretched is reduced to reduce the back thrust applied to the tactile member 20, thereby increasing the output thrust of the tactile member 20.

Preferably, the connection part 222 is detachably connected to the connection body 221. In this way, by detaching the connection portion 222 and the connection body 221, the connection body 221 is disconnected from the adjustment assembly 41, so that the connection body 221 and the armature 21 can be detached as a whole for packaging and transportation.

Referring to fig. 2 to 4, the mounting body 10 includes a first portion 11 and a second portion 12, the first portion 11 is mounted to the second portion 12 and forms the mounting space 101 together with the second portion 12, and the through hole 102 is formed in the second portion 12. The adjusting component 41 is screwed on the first portion 11, and the adjusting component 41 can extend or retract into the installation space 101 at an end of the first portion 11 away from the second portion 12. The adjusting component 41 can rotate relative to the first portion 11 and move outside the connecting body 221 under an external force, so as to adjust the counter thrust applied by the counter thrust applying component 42 to the contact moving component 20 after the contact moving component 20 is electrified by the electromagnetic force generated by the coil 30.

Preferably, the adjusting component 41 and an end of the first portion 11 on the same side as the end of the second portion 12 form a force bearing structure 411, and the force bearing structure 411 can cooperate with a screwing tool to transmit torque through the screwing tool to rotate the adjusting component 41.

Preferably, the force receiving structure 411 is implemented as a receptacle having a polygonal cross section perpendicular to the movement direction of the adjustment assembly 41.

Preferably, the force receiving structure 411 is implemented as a hexagonal socket.

As a deformability, the force-receiving structure 411 is implemented as an outer wall of the adjustment assembly 41, and a section of a portion of the adjustment assembly 41 forming the force-receiving structure 411 perpendicular to a moving direction of the adjustment assembly 41 assumes a polygonal shape.

Preferably, after the adjusting component 41 is screwed to the first portion 11, the contact moving component 20 is screwed to the second portion 12 and connected to the adjusting component 41 by the counter thrust applying piece 42, the first portion 11 and the second portion 12 are buckled into a whole.

It should be noted that the portion of the first portion 11 that is screwed with the adjusting component 41 is hard pressed to deform the internal thread and form at least one resistance increasing slot 1101 on the surface, so as to increase the resistance of the adjusting component 41 during rotation, so as to prevent the adjusting component 41 from loosening due to external force, and ensure that the adjusting component 41 is kept in the moved position.

Referring to fig. 2 to 4, the adjusting assembly 41 includes an adjusting body 412 and a connector 413, the stress structure 411 is formed on the adjusting body 412, the adjusting body 412 is movably mounted on the mounting space 101, and the counter thrust applying member 42 is located between the connector 413 and the connecting portion 222. The connector 413 is detachably connected to the adjusting body 412 to be detachably connected with the connecting body 221 based on the connection portion 222, and the connecting body 221, the adjusting assembly 41 and the reverse thrust applying member 42 are disconnected by detaching the connecting portion 222 from the connecting body 221 and detaching the connector 413 from the adjusting body 412, so that the reverse thrust applying member 42 is replaced after use loss.

Preferably, the connection part 222 and the connector 413 are both sleeved on the connection main body 221. The electromagnetic assembly with adjustable output thrust further comprises two shift-preventing rings 50, wherein the adjusting body 412 has a communication hole 41201 communicating with the installation space 101, one shift-preventing ring 50 is detachably sleeved on the connecting body 221, and the other shift-preventing ring 50 is detachably installed on the inner wall of the adjusting body 412 forming the communication hole 41201. The anti-moving ring 50 mounted on the connecting body 221 is kept in contact with the connecting portion 222 and can be driven by the connecting body 221 to push the connecting portion 222 to move together when the electromagnetic force generated by the armature 21 energized by the coil 30 moves toward the through hole 102, so that the counter-pushing force applying member 42 mounted on the connecting portion 222 can be elastically deformed to apply a counter-pushing force to the contact moving assembly 20. The anti-moving ring 50 mounted on the adjusting body 412 is kept in contact with the contact piece 413 and can be driven by the adjusting body 412 to push the contact piece 413 to move together when the adjusting body 412 moves back to the through hole 102, so that the anti-pushing force applying piece 42 mounted on the contact piece 413 can be elastically deformed to different degrees to apply different degrees of anti-pushing force to the contact moving assembly 20, and further the output pushing force of the contact moving assembly 20 is adjusted. In this way, the connection portion 222 and the connection body 221, and the connection piece 413 and the adjustment body 412 can be mounted by the two anti-moving rings 50 without affecting the adjustment of the output thrust of the contact assembly 20, so that the assembly mode is simplified and the convenience of mounting is increased.

Referring to fig. 2 to 4, the electromagnetic assembly with adjustable output thrust further comprises a sealing assembly 60, the sealing assembly 60 comprising at least a first sealing member 61, the first sealing member 61 being mounted between the adjustment body 412 of the adjustment assembly 41 and the first portion 11 of the mounting body 10, the first sealing member 61 being used for sealing the adjustment body 412 with the first portion 11.

Preferably, the first seal 61 is embodied as a sealing ring.

The seal assembly 60 further includes at least a second seal 62, the second seal 62 being mounted between the first portion 11 and the second portion 12, the second seal 62 being configured to sealingly connect the first portion 11 to the second portion 12.

Preferably, the second seal 62 is embodied as a sealing ring.

Referring to fig. 2 to 4, the electromagnetic assembly with adjustable output thrust further includes an emergency member 70, the emergency member 70 is mounted on the outer side of the connection body 221, and the emergency member 70 can be moved by an external force to push the connection body 221 to move toward the through hole 102, so as to ensure that the contact assembly 20 can normally move when the coil 30 is suddenly de-energized.

Preferably, the emergency member 70 is movably installed to the communication hole 41201 at a side of the connection body 221 remote from the through-hole 102. The force receiving structure 411 is implemented as a socket having a polygonal cross section perpendicular to the moving direction of the adjustment assembly 41, which communicates with the communication hole 41201, and the worker can push the emergency member 70 to move through the socket.

Referring to fig. 2 to 4, the sealing assembly 60 further comprises at least one third sealing member 63, the third sealing member 63 being mounted between the adjustment body 412 of the adjustment assembly 41 and the emergency member 70, the third sealing member 63 being used for sealing the emergency member 70 with the adjustment body 412.

Preferably, the third seal 63 is embodied as a sealing ring.

The working method of the electromagnetic assembly with the adjustable output thrust is provided, and comprises the following steps:

Energizing the coil 30 to generate electromagnetic force to push the contact assembly 20 to move along the installation space 101 toward the through hole 102 to apply thrust to a valve core, and at this time, the reverse thrust applying member 42 located between the connecting member 22 of the contact assembly 20 and the adjusting assembly 41 is elastically deformed;

The adjusting component 41 is moved towards or away from the through hole 102 in the mounting space 101 under the action of an external force to intensify or slow down the elastic deformation of the counter thrust applying component 42, so as to adjust the counter thrust applied to the contact moving component 20, and further adjust the output thrust of the contact moving component 20.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present utility model have been fully and effectively realized. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.

Claims (10)

1. An output thrust adjustable solenoid assembly mounted to a spool, the output thrust adjustable solenoid assembly comprising:

The installation main body is provided with an installation space and a through hole communicated with the installation space;

A contact assembly mounted in the mounting space and capable of being driven to move along the mounting space in a direction toward or away from the through opening, the contact assembly including an armature mounted to the connecting member and a connecting member connected to the valve core at an end of the mounting space adjacent to the through opening;

A coil magnetically connected to the armature, the coil being mounted to the mounting body, the coil being capable of being energized to apply electromagnetic force to the armature to urge the armature and the connector to move integrally within the mounting space in a direction toward the through-hole to apply thrust to the valve core;

The adjusting component is arranged in the installation space and is positioned on one side of the installation space away from the through hole, the adjusting component comprises an adjusting component and a reverse thrust applying piece, the reverse thrust applying piece is arranged between the adjusting component and the connecting piece, the reverse thrust applying piece can be elastically deformed to apply reverse thrust to the touch moving component when the touch moving component is driven by the coil to move towards the through hole in the installation space, and the adjusting component can move along the installation space in a direction towards or away from the through hole to intensify or slow down the deformation of the reverse thrust applying piece so as to adjust the reverse thrust applied by the reverse thrust applying piece to the touch moving component and adjust the output thrust of the touch moving component in cooperation with the coil.

2. The electromagnetic assembly of claim 1, wherein the connector includes a connector body mounted to the armature and extending in a direction in which the adjustment member and the port are located, and a connector portion mounted to a side portion of the connector body, the counter-thrust applicator being located between the connector portion and the adjustment assembly.

3. The electromagnetic assembly of claim 2, wherein the opposing force applying member is oriented toward the adjustment assembly near an end of the opening, the opposing force applying member is oriented toward the connecting portion away from an end of the opening, the opposing force applying member is compressed when the contact assembly is moved toward the mounting space by an electromagnetic force generated by energizing the coil, the opposing force applying member is further compressed to increase an opposing force applied by the adjustment assembly to the contact assembly when the adjustment assembly is moved away from the opening to the mounting space, thereby reducing an output thrust of the contact assembly, and the opposing force applying member is compressed to decrease an opposing force applied by the adjustment assembly to the contact assembly when the adjustment assembly is moved toward the opening to the mounting space by an external force, thereby increasing an output thrust of the contact assembly.

4. An electromagnetic assembly according to claim 2 or 3, wherein the mounting body comprises a first portion and a second portion, the first portion is mounted on the second portion and forms the mounting space together with the second portion, the through hole is formed in the second portion, the adjusting assembly is screwed into the first portion, the adjusting assembly can be extended out of or retracted into the mounting space at an end of the first portion away from the second portion, the adjusting assembly can be rotated relative to the first portion by external force and moved outside the connecting body, so that after the contact assembly is electrified by the electromagnetic force generated by the coil, the counter-thrust force applied by the counter-thrust applying member acts on the contact assembly.

5. The adjustable output thrust electromagnetic component according to claim 4, wherein the portion of the first portion that is threadably coupled to the adjustment assembly is hard pressed to deform the internal threads thereof and form at least one resistance increasing groove in the surface.

6. The adjustable output thrust electromagnetic assembly of claim 4, wherein the adjustment assembly and an end of the first portion on the same side as an end of the second portion, the end being distal from the second portion, form a stressed structure that is capable of cooperating with a turning tool to transmit torque through the turning tool to rotate the adjustment assembly.

7. The electromagnetic assembly of claim 6, wherein the adjustment assembly includes an adjustment body and an abutment, the force receiving structure is formed in the adjustment body, the adjustment body is movably mounted in the mounting space, the counter-thrust applicator is positioned between the abutment and the connection, the abutment is detachably connected to the adjustment body, and the connection is detachably connected to the connection body.

8. The electromagnetic component with adjustable output thrust according to claim 7, wherein the connecting portion and the connecting piece are both sleeved on the connecting body, the electromagnetic component with adjustable output thrust further comprises two blocking rings, the adjusting body is provided with a communication hole communicated with the installation space, one blocking ring is detachably sleeved on the connecting body, the other blocking ring is detachably installed on the inner wall of the adjusting body forming the communication hole, the blocking ring installed on the connecting body is abutted with the connecting portion and can be driven by the connecting body to push the connecting portion to move together when the electromagnetic force generated by energizing the armature through the coil moves towards the through hole, and the blocking ring installed on the adjusting body is abutted with the connecting piece and can be driven by the adjusting body to push the connecting piece to move when the adjusting body moves back to the through hole.

9. The output thrust adjustable electromagnetic assembly of claim 7, further comprising a seal assembly including at least a first seal mounted between the adjustment body of the adjustment assembly and the first portion of the mounting body, the first seal for sealing connection of the adjustment body with the first portion.

10. The output thrust adjustable electromagnetic assembly of claim 2, further comprising an emergency member mounted to an outer side of the connecting body, the emergency member being movable by an external force to urge the connecting body toward the through opening.