Rotary electromagnet with state monitoring function

Abstract

The utility model 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] This utility model belongs to the field of electromagnet manufacturing technology, specifically relating to a rotary electromagnet with status monitoring function. Background Technology

[0002] Existing rotary electromagnets all work by using electromagnetic attraction when the coil is energized, causing the armature to rotate a predetermined angle against the return spring, thus automatically unlocking the armature. When the coil is de-energized, the electromagnetic attraction disappears, and the return spring returns the armature to its original position, restoring the locking function. With the increasing demands for reliability and testability in the overall system, rotary electromagnets are required to have built-in status monitoring capabilities. This monitoring would check whether the armature has rotated to the correct position for automatic unlocking after energization, and whether the armature has returned to its original position for relocking after de-energization. Therefore, a rotary electromagnet with status monitoring functionality is needed to address these issues. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, this utility model provides a rotary electromagnet with a status monitoring function. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0004] A rotary electromagnet with status monitoring function includes a housing, in which a coil assembly, an iron core, and an armature are installed; the iron core is T-shaped, with its lower end fitted into the inner cavity of the coil assembly; the armature has a cross-shaped structure, with its horizontal part located below the iron core, and its vertical part having its upper end protruding through the axial center hole of the iron core along the upper end of the iron core and its lower end extending downward.

[0005] The horizontal portion of the armature has a toothed structure, and a restoring spring is provided between at least one pair of adjacent teeth; a stop bar is provided on the side of the cover, the stop bar extends into any pair of adjacent teeth without the restoring spring, and the stop bar abuts against the tooth side on one side due to the reaction force of the restoring spring; several raised pole shoe surfaces are provided on the inner side of the cover opposite to the horizontal portion of the armature, and the tooth end faces of the toothed structure are opposite to and staggered with the pole shoe surfaces;

[0006] A base plate is fixed to the upper end face of the iron core, and a first spring group and a second spring group are fixed opposite to each other on the upper surface of the base plate. Each of the first spring group and the second spring group includes a moving spring and a stationary 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 the stationary spring. At this time, the moving spring of the second spring group separates from the stationary spring. When the coil assembly is energized, the armature overcomes the reaction force of the restoring spring and rotates until the stop rod abuts against the toothed side on its other side, driving the push rod to reverse so that its other end pushes the moving spring of the second spring group to contact the stationary spring. At the same time, the moving spring of the first spring group separates from the stationary spring.

[0007] Furthermore, the restoring spring has a V-shaped structure, and a slot is provided on the inner side of the cover opposite to the restoring spring; one end of the V-shaped structure is fixed on the tooth side, and the other end is fitted into the slot.

[0008] Furthermore, the stop rod passes through the side of the cover and is threadedly connected to the cover. The rotation angle of the armature can be adjusted by rotating the stop rod to adjust the length of its inner end extending between the teeth.

[0009] Furthermore, a first bearing is provided between the upper end face of the iron core and the armature; a second bearing is provided between the lower end face of the iron core and the armature.

[0010] Furthermore, a cover plate is fixed to the lower end of the housing, and a third bearing is provided between the lower end of the armature and the cover plate.

[0011] Furthermore, an annular groove is provided on the lower end face of the horizontal part of the armature, and a buffer pad is installed in the annular groove, which abuts against the third bearing.

[0012] Furthermore, insulating top rods are installed at both ends of the push rod, and the movable spring is pushed by the insulating top rods.

[0013] Furthermore, a dust cover is fixed to the upper end of the housing.

[0014] Furthermore, a lead-out tube is provided on the side of the housing, and the leads of the coil assembly, the first reed group, and the second reed group are all led out from the lead-out tube.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model 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 overall volume of the coil frame, increasing the winding space by 10%, and improving the electromagnetic attraction force by 20%;

[0017] 2. The present invention has eight raised pole shoe surfaces between the armature and the cover. When the coil is energized, all 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.

[0018] 3. The status monitoring part is composed of push rod, first reed group and second reed group. As the armature rotates, push rod contacts different reed groups, so that the whole machine can judge the status of electromagnet in time. When the electromagnet fails, emergency measures can be taken in time to avoid damage to the whole machine.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the state monitoring section of this utility model when no power is applied.

[0023] Figure 4 This is a schematic diagram of the state monitoring section of this utility model after power is applied;

[0024] Figure 5 This is a schematic diagram of the armature state when no power is applied.

[0025] Figure 6 This is a schematic diagram of the armature state when the present invention is powered on.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Cover; 2-Dust cover; 3-Cover plate; 4-Coil assembly; 5-Iron core; 6-Armature; 7-Restoring spring; 8-Stop bar; 9-Base plate; 10-First spring group; 11-Second spring group; 12-Push rod; 13-Insulating top rod; 14-First bearing; 15-Second bearing; 16-Third bearing; 17-Buffer pad; 18-Outlet tube; 1-1-Slot; 4-1-Brass tube frame; 4-2-Coil; 10-1-Moving spring; 10-2-Stationary spring. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0029] Please also see Figures 1-6This utility model embodiment provides a rotary electromagnet with status monitoring function, specifically including a housing 1. The upper end of the housing 1 is fixed with a dust cover 2 by bolts, and the lower end is fixed with a cover plate 3 by bolts, so that the housing 1 forms a closed whole. The housing 1 is equipped with a coil assembly 4, an iron core 5, and an armature 6. The coil assembly 4 includes a brass tube frame 4-1 and a coil 4-2 wound on the brass tube frame 4-1. 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 has a cross-shaped structure, with its horizontal part located below the iron core 5, its upper end of the vertical part passing through the axial center hole of the iron core 5 through the upper end face of the iron core 5, and its lower end extending downwards out of the lower end face of the cover plate 3.

[0030] The horizontal portion of the armature 6 has a toothed structure. In this embodiment, the armature 6 has eight teeth, and the tooth end faces of the eight teeth are the working pole shoes of the armature 6. Eight protruding pole shoes are provided on the inner side of the casing 1, which is opposite to the horizontal portion of the armature 6 and located outside the armature 6. The eight pole shoes of the armature 6 are opposite to and staggered with the eight pole shoes of the casing 1. That is, a line is drawn between the center of the pole shoes of the armature 6 and the center of the armature 6, and a line is drawn between the center of the pole shoes of the casing 1 and the center of the armature 6. The two lines have a certain angle between them, so that the electromagnetic attraction between the pole shoes of the casing 1 and the pole shoes of the armature 6 is tilted at a certain angle relative to the radial direction. Thus, after the coil 4-2 is energized, the armature 6 can rotate and be unlocked. The specific misalignment angle between the pole shoes of the armature 6 and the pole shoes of the casing 1 is determined according to the user requirements. This utility model does not make a specific limitation here.

[0031] The armature 6 has six pairs of adjacent teeth with a restoring spring 7 fixed between them, i.e., there are six restoring springs 7, and the six restoring springs 7 are arranged in pairs opposite each other; the inner side of the cover 1 is provided with a slot 1-1 opposite to the restoring spring 7; the restoring spring 7 has a V-shaped structure, one end of which is fixed to the tooth side surface of the armature 6, i.e., the side surface of the pole shoe, and the other end is fitted into the slot 1-1, and the restoring spring 7 is in an inward tightened state; the side of the cover 1 is provided with a stop bar 8, which extends between two adjacent teeth of the armature 6 that are not fitted with restoring springs 7, and the stop bar 8 is abutted against the tooth side surface on one side by the reaction force of the restoring spring 7.

[0032] It should be noted that it is not necessary to install a reset spring 7 between all adjacent teeth; the number of reset springs 7 is sufficient for the electromagnet to work normally.

[0033] A base plate 9 is fixed to the upper end face of the iron core 5. A first spring group 10 and a second spring group 11 are fixed opposite each other above the base plate 9. Each of the first and second spring groups 10 includes a movable spring 10-1 and a stationary spring 10-2. Both the movable spring 10-1 and the stationary spring 10-2 are fixed to the base plate 9 by rivets. Leads are connected to the movable spring 10-1 and the stationary spring 10-2, with the other end of each lead connected to the positive and negative terminals of a power supply. A push rod 12 is horizontally fixed to the upper end of the armature 6. Under the reaction force of the restoring spring 7, the armature 6 drives the push rod 12 to rotate, causing one end to push the movable spring 10-1 of the first spring group 10 into contact with the stationary spring 10-2. At this time, the movable spring 10-1 and... When the lead wire on the stationary reed 10-2 is connected, the circuit on the first reed group 10 is connected, allowing the entire machine to determine that the electromagnet is in a locked state. Meanwhile, the moving reed 10-1 of the second reed group 11 separates from the stationary reed 10-2. When the coil 4-2 is energized, the armature 6, under the action of electromagnetic attraction, overcomes the reaction force of the restoring reed 7 and the load, rotating until the stop rod 8 abuts against its other side toothed surface. This causes the push rod 12 to reverse, pushing its other end to contact the moving reed 10-1 of the second reed group 11 with the stationary reed 10-2. At this time, the circuit on the second reed group 11 is connected, allowing the entire machine to determine that the electromagnet is in an unlocked state. Simultaneously, the moving reed 10-1 of the first reed group 10 separates from the stationary reed 10-2. The first reed group 10, the second reed group 11, and the push rod 12 form the electromagnet's state monitoring section, which can monitor whether the locking or unlocking process of the electromagnet is complete.

[0034] Furthermore, in order to ensure the insulation performance between the armature 6 and the movable spring 10-1 when the push rod 12 pushes the movable spring 10-1, an insulating top rod 13 is installed at each end of the push rod 12, and the movable spring 10-1 of the first spring group 10 or the second spring group 11 is pushed by the insulating top rod.

[0035] Furthermore, the stop rod 8 passes through the side of the cover 1 and is threadedly connected to the cover 1, and is laterally located between the two teeth of the armature 6 that are adjacent to each other and without the restoring spring 7. The rotation angle of the armature 6 can be adjusted by rotating the stop rod 8 to adjust the length of its inner end extending between the teeth of the armature 6; the longer the length of the stop rod 8 extending between the two teeth, the smaller the rotation angle of the armature 6, and vice versa.

[0036] Furthermore, in order to reduce the frictional force experienced by the armature 6 when it rotates, a first bearing 14 is provided between the upper end face of the iron core 5 and the upper end of the armature 6; a mounting groove is provided between the lower end face of the iron core 5 and the upper end face of the horizontal part of the armature 6, and a number of balls are assembled in the mounting groove to form a combined second bearing 15; a third bearing 16 is provided between the lower end of the armature 6 and the cover plate 3.

[0037] In addition, an annular groove is provided on the lower end face of the horizontal part of the armature 6, and a buffer pad 17 is installed in the annular groove. The buffer pad 17 abuts 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, and the stability of the electromagnetic attraction force of the entire electromagnet is ensured.

[0038] Furthermore, a wire outlet tube 18 is provided on the side of the cover 1, and the leads on the coil, the first reed group 10 and the second reed group 11 are all led out from the wire outlet tube 18.

[0039] The working process of this rotary electromagnet with condition monitoring function is as follows:

[0040] When coil 4-2 is not energized, the insulating push rod 13 at one end of push rod 12 on armature 6 rotates under the reaction force of the restoring spring 7, thereby pushing the moving spring 10-1 of the first spring group 10 into contact with the stationary spring 10-2. At this time, the circuit on the first spring group 10 is connected, and the second spring group 11 is in the open state, so that the whole machine can determine that the electromagnet is in the locked state. When coil 4-2 is energized, armature 6 is excited to overcome the load and the reverse rotation of the restoring spring 7 by a specified angle, and the insulating push rod 13 at one end of push rod 12 disengages from the moving spring 10-1 of the first spring group 10, so that the moving spring 10-1 of the first spring group 10... When the first reed group 10 separates from the stationary reed 10-2, it returns to the open state, and the corresponding circuit is also disconnected. At the same time, the insulating push rod 13 at the other end of the push rod 12 pushes the moving reed 10-1 of the second reed group 11 to contact the stationary reed 10-2, and the circuit of the second reed group 11 is turned on, so that the whole machine can determine that the electromagnet is in the unlocked state. When the coil 4-2 is de-energized, the armature 6 is reset to the unexcited state under the action of the reaction force of the restoring reed 7. At this time, the first reed group 10 is in the closed state, and the second reed group 11 is in the open state. The first reed group 10 is turned on, so that the whole machine can determine that the electromagnet is reset to the locked state.

[0041] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0042] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A rotary electromagnet with condition monitoring function, characterized in that, The device includes a housing, within which a coil assembly, an iron core, and an armature are installed. The iron core is T-shaped, with its lower end fitted into the inner cavity of the coil assembly. The armature has a cross-shaped structure, with its horizontal portion located below the iron core, and its vertical portion extending downwards from the upper end of the iron core through the axial center hole along the iron core. The horizontal portion of the armature has a toothed structure, and a restoring spring is provided between at least one pair of adjacent teeth; a stop bar is provided on the side of the cover, the stop bar extends into any pair of adjacent teeth without the restoring spring, and the stop bar abuts against the tooth side surface on one side of the cover due to the reaction force of the restoring spring; several raised pole shoe surfaces are provided on the inner side of the cover opposite to the horizontal portion of the armature, and the tooth end face of the toothed structure is opposite to and staggered with the pole shoe surface; A base plate is fixed to the upper end face of the iron core, and a first spring group and a second spring group are fixed opposite to each other on the upper surface of the base plate. Each of the first spring group and the second spring group includes a moving spring and a stationary 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 the stationary spring. At this time, the moving spring of the second spring group separates from the stationary spring. When the coil assembly is energized, the armature overcomes the reaction force of the restoring spring and rotates until the stop rod abuts against the toothed side on its other side, driving the push rod to reverse so that its other end pushes the moving spring of the second spring group to contact the stationary spring. At the same time, the moving spring of the first spring group separates from the stationary spring.

2. The rotary electromagnet with status monitoring function according to claim 1, characterized in that, The restoring spring has a V-shaped structure, and a slot is provided on the inner side of the cover opposite to the restoring spring; one end of the V-shaped structure is fixed on the tooth side, and the other end is fitted into the slot.

3. The rotary electromagnet with status monitoring function according to claim 1, characterized in that, The stop rod passes through the side of the cover and is threadedly connected to the cover. The rotation angle of the armature can be adjusted by rotating the stop rod to adjust the length of its inner end extending between the teeth.

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

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

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

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

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

9. The rotary electromagnet with status monitoring function according to claim 1, characterized in that, The cover has a lead tube on its side, from which the leads of the coil assembly, the first reed group, and the second reed group are led out.

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