Rotary electromagnet with state monitoring function

Abstract

The invention discloses a rotary electromagnet with a state monitoring function, which comprises a housing in which a coil assembly, an iron core and an armature are arranged; the lower end of the iron core is assembled in an inner cavity of the coil assembly; the armature is of a cross structure, the horizontal part is located below the iron core, the upper end of the vertical part penetrates out of the upper end face of the iron core along the axial center hole of the iron core, and the lower end extends downwards. The horizontal part of the armature is of a tooth-shaped structure, and a reset reed is arranged between at least one pair of adjacent teeth. A stop lever is mounted on the side surface of the housing, extends into any pair of adjacent teeth and is propped against the tooth side surface on one side; a plurality of protruding pole shoe faces are arranged on the inner side of the cover shell, and the tooth end faces of the tooth-shaped structures and the pole shoe faces are distributed in a staggered mode. A substrate is arranged on the upper end surface of the iron core, and two reed groups are arranged above the substrate; each of the two reed groups comprises a movable reed and a static reed; a push rod is horizontally arranged at the upper end of the armature and rotates to be matched with the first reed set or the second reed set under the action of the reset reed. The structure can monitor the state of the electromagnet and prevent the whole machine from being damaged.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnet manufacturing, and in particular relates to a rotary electromagnet with a state monitoring function. Background Art

[0002] The existing rotary electromagnets are all that after the coil is powered on, the electromagnetic suction force generated by the electromagnet causes the armature to overcome the reaction force of the return spring and rotate to a specified angle to achieve the automatic unlocking function; after the coil is powered off, the electromagnetic suction force disappears, and the armature is reset under the action of the return spring reaction force to restore the locking function. With the upgrade of the reliability and testability of the whole machine, the rotary electromagnet is required to have a state monitoring function to monitor whether the armature rotates to the right position and automatically unlocks after the electromagnet is powered on; after the coil is powered off, whether the armature is reset to the right position and re-locked. Therefore, a rotary electromagnet with a state monitoring function is needed to solve the above-mentioned problems. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a rotary electromagnet with a state monitoring function. The technical problem to be solved by the present invention is achieved through the following technical solutions: A rotary electromagnet with a state monitoring function comprises a housing, wherein a coil assembly, an iron core and an armature are installed in the housing; the iron core is T-shaped, and its lower end is assembled in the inner cavity of the coil assembly; the armature is a cross-shaped structure, wherein the horizontal portion is located below the iron core, and the upper end of the vertical portion passes through the upper end surface of the iron core along the axial center hole of the iron core, and the lower end extends downward; The horizontal part of the armature is in a tooth-shaped structure, and a restoring spring is provided between at least one pair of adjacent teeth; a blocking rod is provided on the side of the housing, and the blocking rod extends into any pair of adjacent teeth without the restoring spring, and the blocking rod is abutted against the tooth side on one side thereof by the reaction force of the restoring spring; a plurality of raised pole shoe surfaces are provided on the inner side of the housing opposite to the horizontal part of the armature, and the tooth end surface of the tooth-shaped structure is opposite to the pole shoe surface and is staggeredly distributed; A base plate is fixed on the upper end surface of the iron core, and a first spring group and a second spring group are relatively fixed above the base plate; the first spring group and the second spring group each include a moving spring and a static spring; a push rod is horizontally fixed to the upper end of the armature, and the armature drives the push rod to rotate under the action of the reaction force of the restoring spring, so that one end of the push rod pushes the moving spring of the first spring group to contact with the static spring, and at this time, the moving spring of the second spring group is separated from the static spring; when the coil assembly is energized, the armature overcomes the reaction force of the restoring spring and rotates until the blocking rod and the tooth side on the other side thereof are abutted, driving the push rod to reverse so that the other end of the push rod pushes the moving spring of the second spring group to contact with the static spring, and at the same time, the moving spring of the first spring group is separated from the static spring.

[0004] Furthermore, the restoring spring is in a V-shaped structure, and a slot is provided on the inner side of the housing at a position opposite to the restoring spring; one end of the V-shaped structure is fixed on the tooth side, and the other end is clamped in the slot.

[0005] Furthermore, the shift rod passes through the side surface of the housing and is threadedly connected to the housing. The armature rotation angle can be adjusted by rotating the shift rod to adjust the length of the inner end thereof extending between the teeth.

[0006] Furthermore, a first bearing is arranged between the upper end surface of the iron core and the armature; and a second bearing is arranged between the lower end surface of the iron core and the armature.

[0007] Furthermore, a cover plate is fixed to the lower end of the cover shell, and a third bearing is arranged between the lower end of the armature and the cover plate.

[0008] Furthermore, an annular groove is provided on the lower end surface of the horizontal portion of the armature, a buffer pad is installed in the annular groove, and the buffer pad abuts against the third bearing.

[0009] Furthermore, insulating push rods are installed at both ends of the push rod, and the movable spring is pushed by the insulating push rods.

[0010] Furthermore, a dust cover is fixed to the upper end of the cover shell.

[0011] Furthermore, a wire outlet tube is provided on the side of the cover shell, and the leads of the coil assembly, the first reed group and the second reed group are all led out from the wire outlet tube.

[0012] Beneficial effects of the present invention: 1. The present invention directly replaces the traditional plastic coil frame and the brass tube located on the inner wall of the plastic coil frame with a brass tube frame, thereby reducing the volume of the coil frame as a whole, increasing the winding space by 10%, and improving the electromagnetic suction force by 20%; 2. Eight raised pole shoe surfaces are arranged between the armature and the cover shell of the present invention. When the coil is energized, the eight pole shoe surfaces can generate electromagnetic attraction, ensuring that the electromagnetic attraction of the electromagnet meets the requirements of the whole machine; at the same time, the restoring spring is installed in the tooth surface of the armature, which effectively reduces the volume of the electromagnet; 3. The push rod and the first and second reed groups form a state monitoring part. As the armature rotates, the push rod contacts different reed groups, so that the whole machine can timely judge the state of the electromagnet. When the electromagnet fails, emergency measures can be taken in time to avoid damage to the whole machine.

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic diagram of the appearance structure of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 It is a state schematic diagram of the state monitoring part of the present invention when no power is supplied; Figure 4 It is a state schematic diagram of the state monitoring part after power-on of the present invention; Figure 5 It is a schematic diagram of the armature state when no power is applied to the present invention; Figure 6 This is a schematic diagram of the armature state when power is applied to the present invention.

[0015] Description of reference numerals: 1-case; 2-dust cover; 3-cover plate; 4-coil assembly; 5-iron core; 6-armature; 7-restoring reed; 8-shift lever; 9-base plate; 10-first reed group; 11-second reed group; 12-push rod; 13-insulating push rod; 14-first bearing; 15-second bearing; 16-third bearing; 17-buffer pad; 18-outlet tube; 1-1-slot; 4-1-brass tube rack; 4-2-coil; 10-1-moving reed; 10-2-static reed. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0017] Please also see Figure 1 to Figure 6 The embodiment of the present invention provides a rotary electromagnet with a state monitoring function, which specifically includes a cover shell 1, wherein a dust cover 2 is fixed to the upper end of the cover shell 1 by bolts, and a cover plate 3 is fixed to the lower end by bolts, so that the cover shell 1 forms a closed whole; a coil assembly 4, an iron core 5 and an armature 6 are installed in the cover shell 1, wherein the coil assembly 4 includes a brass tube frame 4-1 and a coil 4-2 wound on the brass tube frame 4-1, and the outer walls of the brass tube frame 4-1 and the iron core 5 are both wrapped with a polyimide film to ensure insulation between the brass tube frame 4-1 and the coil 4-2; the iron core 5 is T-shaped, and its lower end is assembled in the inner cavity of the brass tube frame 4-1; the armature 6 is a cross-shaped structure, wherein the horizontal part is located below the iron core 5, the upper end of the vertical part passes through the upper end surface of the iron core 5 along the axial center hole of the iron core 5, and the lower end of the vertical part extends downwardly out of the lower end surface of the cover plate 3.

[0018] The horizontal part of the armature 6 is a tooth-shaped structure. In an embodiment of the present invention, the armature 6 has eight teeth, and the tooth end faces of the eight teeth are the working pole shoe surfaces of the armature 6. Eight raised pole shoe surfaces are arranged on the inner side of the cover shell 1 opposite to the horizontal part of the armature 6 and located on the outside of the armature 6, and the eight pole shoe surfaces of the armature 6 are opposite to the eight pole shoe surfaces of the cover shell 1 and are staggered, that is, the center of the pole shoe surface of the armature 6 is connected with the center of the armature 6, and the center of the pole shoe surface of the cover shell 1 is connected with the center of the armature 6, and there is a certain angle between the two lines, so that the electromagnetic attraction generated between the pole shoe surface of the cover shell 1 and the pole shoe surface of the armature 6 are both inclined at a certain angle relative to the radial direction, so that after the coil 4-2 is energized, the armature 6 can rotate and be unlocked. The specific staggered angle between the pole shoe surface of the armature 6 and the pole shoe surface of the cover shell 1 is determined according to user requirements, and the present invention does not make specific limitations here.

[0019] Restoring springs 7 are fixed between six pairs of adjacent teeth of the armature 6, that is, six restoring springs 7 are provided, and the six restoring springs 7 are arranged opposite to each other in pairs; a slot 1-1 is provided on the inner side of the cover shell 1 at a position opposite to the restoring spring 7; the restoring spring 7 is in a V-shaped structure, one end of which is fixed on the tooth side of the armature 6, that is, the side of the pole shoe surface, and the other end is clamped in the slot 1-1, and the restoring spring 7 is in an inwardly tightened state; a stopper rod 8 is provided on the side of the cover shell 1, and the stopper rod 8 extends between two adjacent teeth of the armature 6 on which no restoring springs 7 are installed, and the reaction force of the restoring spring 7 causes the stopper rod 8 to abut against the tooth side surface on one side thereof.

[0020] It should be noted that it is not necessary to arrange the restoring reeds 7 between all adjacent teeth, and the number of the restoring reeds 7 is sufficient for the electromagnet to work normally.

[0021] A base plate 9 is fixed to the upper end surface of the iron core 5, and a first spring group 10 and a second spring group 11 are relatively fixed above the base plate 9; the first spring group 10 and the second spring group 11 each include a moving spring 10-1 and a static spring 10-2, and the moving spring 10-1 and the static spring 10-2 are fixed to the base plate 9 by rivets, and the moving spring 10-1 and the static spring 10-2 are connected with leads, and the other ends of the leads are connected to the positive and negative electrodes of the power supply; a push rod 12 is horizontally fixed to the upper end of the armature 6, and the armature 6 drives the push rod 12 to rotate under the action of the reaction force of the restoring spring 7, so that one end of the push rod 12 pushes the moving spring 10-1 of the first spring group 10 to contact with the static spring 10-2, at this time, the moving spring 10-1 and The lead wire on the static spring 10-2 is turned on, and the circuit on the first spring group 10 is turned on, so that the whole machine can judge that the electromagnet is in a locked state at this time, and the moving spring 10-1 of the second spring group 11 is separated from the static spring 10-2; when the coil 4-2 is energized, the armature 6 overcomes the reaction force of the restoring spring 7 and the load under the action of the electromagnetic attraction and rotates until the blocking rod 8 is against the tooth side surface on the other side, driving the push rod 12 to reverse so that its other end pushes the moving spring 10-1 of the second spring group 11 to contact the static spring 10-2. At this time, the circuit on the second spring group 11 is turned on, so that the whole machine can judge that the electromagnet is in an unlocked state at this time, and at the same time, the moving spring 10-1 of the first spring group 10 is separated from the static spring 10-2. The state monitoring part of the electromagnet is formed by the first spring group 10, the second spring group 11 and the push rod 12, which can monitor whether the locking or unlocking process of the electromagnet is in place.

[0022] Furthermore, in order to ensure the insulation performance between the armature 6 and the moving spring 10-1 when the push rod 12 pushes the moving spring 10-1, an insulating push rod 13 is installed at each end of the push rod 12, and the moving spring 10-1 of the first spring group 10 or the second spring group 11 is pushed by the insulating push rod.

[0023] Furthermore, the shift rod 8 passes through the side of the cover shell 1 and is threadedly connected to the cover shell 1, and is laterally located between two teeth adjacent to the armature 6 and without the restoration spring 7 installed. The rotation angle of the armature 6 can be adjusted by rotating the shift rod 8 to adjust the length of its inner end extending between the teeth of the armature 6; the longer the length of the shift rod 8 extending between the two teeth, the smaller the rotation angle of the armature 6, and vice versa.

[0024] Furthermore, in order to reduce the friction force on the armature 6 when it rotates, a first bearing 14 is arranged between the upper end surface of the iron core 5 and the upper end of the armature 6; mounting grooves are respectively arranged between the lower end surface of the iron core 5 and the upper end surface of the horizontal part of the armature 6, and a plurality of balls are assembled in the mounting grooves to form a combined second bearing 15; a third bearing 16 is arranged between the lower end of the armature 6 and the cover plate 3.

[0025] In addition, an annular groove is provided on the lower end surface of the horizontal part of the armature 6, and a buffer pad 17 is installed in the annular groove. The buffer pad 17 is against the third bearing 16. The buffer pad 17 is made of rubber. By installing the buffer pad 17, the axial movement of the armature 6 is avoided, thereby ensuring the stability of the electromagnetic attraction of the entire electromagnet.

[0026] Furthermore, a wire outlet tube 18 is provided on the side of the housing 1 , and the lead wires on the coil, the first reed group 10 and the second reed group 11 are all led out from the wire outlet tube 18 .

[0027] The working process of the rotary electromagnet with condition monitoring function is as follows: When the coil 4-2 is not energized, the insulating top rod 13 at one end of the push rod 12 on the armature 6 rotates under the action of the reaction force of the restoring spring 7, thereby pushing the moving spring 10-1 of the first spring group 10 to contact with the static spring 10-2. At this time, the circuit on the first spring group 10 is turned on, and the second spring group 11 is in a disconnected state, so that the whole machine judges that the electromagnet is in a locked state at this time; when the coil 4-2 is energized, the armature 6 is stimulated to overcome the load and the restoring spring 7 to rotate in the opposite direction by a specified angle, and the insulating top rod 13 at one end of the push rod 12 is separated from the moving spring 10-1 of the first spring group 10, so that the moving spring 10-2 of the first spring group 10 is in a locked state. 1 is separated from the static spring 10-2, the first spring group 10 is restored to the disconnected state, and the corresponding circuit is also disconnected. At the same time, the insulating top rod 13 at the other end of the push rod 12 pushes the movable spring 10-1 of the second spring group 11 to contact the static spring 10-2, and the circuit of the second spring group 11 is turned on, so that the whole machine judges that the electromagnet is in the unlocked state at this time; and when the coil 4-2 is powered off, the armature 6 is reset to the unexcited state under the action of the reaction force of the restoring spring 7. At this time, the first spring group 10 is in the closed state, and the second spring group 11 is in the disconnected state; the first spring group 10 is turned on, so that the whole machine judges that the electromagnet is reset to the locked state at this time.

[0028] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0029] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A rotary electromagnet with a state monitoring function, characterized in that: The invention comprises a housing, in which a coil assembly, an iron core and an armature are installed; the iron core is T-shaped, and its lower end is assembled in the inner cavity of the coil assembly; the armature is a cross-shaped structure, and its horizontal part is located below the iron core, and the upper end of the vertical part passes through the upper end surface of the iron core along the axial center hole of the iron core, and the lower end extends downward; The horizontal part of the armature is in a tooth-shaped structure, and a restoring spring is provided between at least one pair of adjacent teeth; a blocking rod is provided on the side of the housing, and the blocking rod extends into any pair of adjacent teeth without the restoring spring, and the blocking rod is abutted against the tooth side surface on one side thereof by the reaction force of the restoring spring; a plurality of raised pole shoe surfaces are provided on the inner side of the housing opposite to the horizontal part of the armature, and the tooth end surface of the tooth-shaped structure is opposite to the pole shoe surface and is staggeredly distributed; A base plate is fixed on the upper end surface of the iron core, and a first spring group and a second spring group are relatively fixed above the base plate; the first spring group and the second spring group each include a moving spring and a static spring; a push rod is horizontally fixed to the upper end of the armature, and the armature drives the push rod to rotate under the action of the reaction force of the restoring spring, so that one end of the push rod pushes the moving spring of the first spring group to contact with the static spring, and at this time, the moving spring of the second spring group is separated from the static spring; when the coil assembly is energized, the armature overcomes the reaction force of the restoring spring and rotates until the blocking rod and the tooth side on the other side thereof are abutted, driving the push rod to reverse so that the other end of the push rod pushes the moving spring of the second spring group to contact with the static spring, and at the same time, the moving spring of the first spring group is separated from the static spring.

2. The rotary electromagnet with state monitoring function according to claim 1, characterized in that: The restoring spring is in a V-shaped structure, and a slot is provided on the inner side of the housing at a position opposite to the restoring spring; one end of the V-shaped structure is fixed on the tooth side surface, and the other end is clamped in the slot.

3. The rotary electromagnet with state monitoring function according to claim 1, characterized in that: The shift rod passes through the side surface of the housing and is threadedly connected to the housing. The armature rotation angle can be adjusted by rotating the shift rod to adjust the length of the inner end thereof extending into the teeth.

4. The rotary electromagnet with state monitoring function according to claim 1, characterized in that: A first bearing is arranged between the upper end surface of the iron core and the armature; and a second bearing is arranged between the lower end surface of the iron core and the armature.

5. The rotary electromagnet with state monitoring function according to claim 1, characterized in that: A cover plate is fixed to the lower end of the cover shell, and a third bearing is arranged between the lower end of the armature and the cover plate.

6. The rotary electromagnet with state monitoring function according to claim 5, characterized in that: The lower end surface of the horizontal part of the armature is provided with an annular groove, a buffer pad is installed in the annular groove, and the buffer pad abuts against the third bearing.

7. The rotary electromagnet with state monitoring function according to claim 1, characterized in that: Insulating push rods are installed at both ends of the push rod, and the movable spring is pushed by the insulating push rods.

8. The rotary electromagnet with state monitoring function according to claim 1, characterized in that: A dust cover is fixed to the upper end of the cover shell.

9. The rotary electromagnet with state monitoring function according to claim 1, characterized in that: A wire outlet tube is arranged on the side of the cover shell, and the lead wires of the coil assembly, the first reed group and the second reed group are all led out from the wire outlet tube.

Images