Suction type bistable magnetic latching contactor
By using permanent magnets and a portal-shaped magnetic guide frame structure in the suction-type electromagnetic contactor, the problem of insufficient spring vibration resistance is solved, and the bistable holding and stable switching of the contacts are achieved, meeting the power saving and reliability requirements of aviation equipment.
Patent Information
- Application Number
- CN202510982048.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-16
- Publication Date
- 2025-10-17
AI Technical Summary
Existing suction-type electromagnetic contactors suffer from poor shock and vibration performance due to the vibration and fatigue resistance of springs, resulting in reduced mechanical parameter durability, which affects reliability and service life. At the same time, the continuous excitation of the coil consumes a lot of power and cannot meet the power saving requirements of aviation and other fields.
Permanent magnets are used instead of springs, and the holding force is transmitted through magnetic flux, so that the contacts can remain in the attracted state after the coil is de-energized. Combined with the gate-shaped magnetic guide frame to form a magnetic flux circuit, a bistable holding function is achieved, eliminating the vibration resistance problem of the spring structure. Stable switching of the contacts is achieved through the hinge structure of the push rod and the armature.
This technology enables the contacts to maintain a stable engaged state after power failure, improves their resistance to shock and vibration, saves power, meets the power-saving and reliability requirements of aviation equipment, and enhances the stability and reliability of the contactor.
Smart Images
Figure CN120809540A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of electromagnetic contactor manufacturing, and particularly relates to a suction type bistable magnetic latching contactor. BACKGROUND
[0002] Generally, one working state of a suction type electromagnetic contactor is maintained by a spring, and the other working state is maintained by continuous excitation of a coil. Since the spring itself has low vibration resistance and fatigue resistance, the armature and the contact are prone to shaking, so that the contactor has technical limitations of low impact vibration index and reduced mechanical parameter durability, thereby affecting the reliability and service life of the contactor, and continuous excitation of the coil consumes more power, which is insufficient for the power saving requirement of airborne equipment in the field of aviation. SUMMARY
[0003] In order to solve the above problems in the prior art, the application provides a suction type bistable magnetic latching contactor. The technical problem to be solved by the application is solved by the following technical scheme. A suction type bistable magnetic latching contactor comprises an electromagnetic system and a contact system located below the electromagnetic system, the electromagnetic system comprises a bottom plate, a door-shaped magnetic guide frame and a yoke are fixed above the bottom plate, and the yoke is located in the door-shaped magnetic guide frame; a magnetic guide plate is installed at the open end of the yoke, a coil assembly is horizontally arranged in the inner cavity of the yoke, one end of the coil assembly is installed at the closed end of the yoke, and the other end of the coil assembly is installed on the magnetic guide plate; a magnetic steel is arranged between the top of the yoke and the door-shaped magnetic guide frame. An iron core is movably arranged in the center hole of the coil assembly, first and second armatures are respectively fixed at the two ends of the iron core, the first armature is located between the door-shaped magnetic guide frame and the closed end of the yoke, and the second armature is located between the door-shaped magnetic guide frame and the magnetic guide plate, so that the first and second armatures have working air gaps with the door-shaped magnetic guide frame; a push rod is hingedly connected to the lower end of the second armature, and the middle part of the push rod is hingedly connected to the bottom plate, and the lower end of the push rod is connected to the contact system. The door-shaped magnetic guide frame forms a loop for the magnetic flux generated by excitation of the coil assembly, overcomes the holding force of the magnetic steel, and makes the iron core move to drive the first and second armatures to move synchronously, thereby driving the push rod to swing and controlling the moving contact and the stationary contact of the contact system to contact or separate.
[0004] Further, the upper end of the push rod is a double-ear structure, the lower end of the second armature is located between the double-ear structure and is hingedly connected to the double-ear structure through a pin shaft.
[0005] Further, the contact system comprises a base plate fixed below the bottom plate, a guide groove parallel to the iron core is arranged in the middle of the upper end surface of the base plate, a sliding block hinged with the lower end of the push rod is arranged in the guide groove, the sliding block is provided with a moving contact spring with the moving contact at the end, the upper end surface of the base plate is provided with a static contact spring opposite to the moving contact and provided with the static contact, the push rod swings to drive the sliding block to slide in the guide groove, and the moving contact spring is driven to move, so that the moving contact and the static contact are contacted or separated.
[0006] Further, a pair of moving contact springs are clamped in the inner cavity of the sliding block, and a spring is arranged between the pair of moving contact springs through an insulating block, both ends of the moving contact spring are provided with moving contacts, and the upper end surface of the base plate is provided with four static contact springs opposite to the moving contacts and provided with static contacts respectively, forming four pairs of two groups of contacts; the push rod swings to drive the sliding block to slide in the guide groove, and a pair of moving contact springs are driven to move, so that the four pairs of moving contacts and static contacts are contacted or separated, and the conversion of the two groups of contacts is completed.
[0007] Further, the base plate is provided with a common input lead-out end, a first input lead-out end, a second input lead-out end and four output lead-out ends, the common input lead-out end, the first input lead-out end and the second input lead-out end are electrically connected with the coil assembly, and the four output lead-out ends are electrically connected with the static contact springs respectively.
[0008] Further, the contactor further comprises a cover, the cover is fixed with the base plate, and the electromagnetic system and the contact system are arranged in the cover.
[0009] The beneficial effects of the present application are as follows: 1. By adding permanent magnetic steel in the inductive electromagnetic system, the permanent magnetic steel magnetic flux is transmitted to the holding force of the armature, so that the contacts can still maintain the attraction state or release state after the coil is powered off, the bidirectional steady-state holding function of the inductive structure armature is realized, the problems of low vibration resistance and fatigue resistance of the original spring holding structure are eliminated, and the coil does not need to be powered continuously, power is saved, and the power saving and high reliability requirements of airborne equipment in the field of aviation are met; 2. The magnetic attraction of the permanent magnetic steel to the armature at either end of the electromagnetic system enables the iron core to maintain a specified working state, so that the contacts can maintain the existing state after the coil is powered on or powered off, and the anti-impact vibration performance of the electromagnetic system and the contact system is improved; 3. The push rod is connected with the bottom plate, the second armature and the sliding block by hinging together, the action function of the electromagnetic system and the contact system of the superposition structure is completed, the conversion of the contact is completed by the second armature controlling the sliding block, the working stability is good, the pushing force of the sliding block can be adjusted by adjusting the length between the two hinging points of the lower end of the push rod, and the reliable contact and reliable separation of the contact are ensured.
[0010] The application will be further described in detail below in combination with the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a schematic diagram of the shape structure of the application; Figure 2 It is a schematic diagram of the structure of the application after removing the cover; Figure 3 It is a schematic diagram of the sectional structure; Figure 2 Figure 4 It is a schematic diagram of the structure of the electromagnetic system; Figure 5 It is a schematic diagram of the structure of the yoke; Figures 6-7 It is a schematic diagram of the structure of the contact system; Figure 8 It is a schematic diagram of the structure of the sliding block; Figures 9-10 It is two working states of the contactor.
[0012] BRIEF DESCRIPTION OF DRAWINGS 1 - electromagnetic system; 2 - contact system; 3 - cover; 1-1 - bottom plate; 1-2 - door-shaped magnetic guide frame; 1-3 - yoke; 1-4 - magnetic guide plate; 1-5 - coil assembly; 1-6 - magnetic steel; 1-7 - limiting column; 1-8 - iron core; 1-9 - first armature; 1-10 - second armature; 1-11 - push rod; 1-12 - mounting plate; 2-1 - moving contact; 2-2 - stationary contact; 2-3 - base plate; 2-4 - guide groove; 2-5 - sliding block; 2-6 - moving spring piece; 2-7 - stationary spring piece; 2-8 - insulating block; 2-9 - spring; 2-10 - output lead end; 2-11 - common input lead end; 2-12 - first input lead end; 2-13 - second input lead end; 1-5-1 - coil holder; 1-5-2 - coil. DETAILED DESCRIPTION
[0013] The application will be further described in detail below in combination with the drawings and embodiments.
[0014] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0015] Please refer to Figures 1-8 The embodiment of the present application provides an inhaled bistable magnetic holding contactor, which specifically comprises an electromagnetic system 1 and a contact system 2 located below the electromagnetic system 1. The electromagnetic system 1 comprises a bottom plate 1-1, a door-shaped magnetic guide frame 1-2 and a yoke 1-3 are riveted and fixed above the bottom plate 1-1, and the yoke 1-3 is located in the door-shaped magnetic guide frame 1-2. A magnetic guide plate 1-4 is installed at the opening end of the yoke 1-3, a coil assembly 1-5 is horizontally arranged in the inner cavity of the yoke 1-3, the coil assembly 1-5 is composed of a coil frame 1-5-1 and a coil 1-5-2 wound on the coil frame 1-5-1, and the coil assembly 1-3 is a single coil frame double-winding and is wound. One end of the coil assembly 1-5 is installed at the closed end of the yoke 1-3, and the other end is installed on the magnetic guide plate 1-4. The yoke 1-3 is a semi-enclosed type formed by one-time processing, the lower end is open, the right end is closed as the closed end, the left end is open as the opening end, and the axial direction is a symmetrical structure. A magnetic steel 1-6 is arranged between the top of the yoke 1-3 and the door-shaped magnetic guide frame 1-2, and the magnetic steel 1-6 is limited by six limiting columns 1-7 on the door-shaped magnetic guide frame 1-2. The lower end of the yoke 1-3 is fixed on the bottom plate 1-1 by screws, so that the electromagnetic system 1 is more stable. The magnetic steel 1-6 is a permanent magnetic steel 1-6, and the double-winding coil generates a main magnetic flux in the opposite direction of the magnetic flux of the permanent magnetic steel when energized, which can overcome the holding force of the magnetic steel.
[0016] An iron core 1-8 is movably arranged in the center hole of the coil assembly 1-5, first and second armatures 1-9 and 1-10 are respectively riveted and fixed at both ends of the iron core 1-8, the first armature 1-9 is located between the door-shaped magnetic guide frame 1-2 and the closed end of the yoke 1-3, the second armature 1-10 is located between the door-shaped magnetic guide frame 1-2 and the magnetic guide plate 1-4, and the distance between the opposite inner sides of the door-shaped magnetic guide frame 1-2 is greater than the distance between the outer sides of the first and second armatures 1-9 and 1-10, so that the first and second armatures 1-9 and 1-10 have working air gaps with the door-shaped magnetic guide frame 1-2. A push rod 1-11 is hingedly connected to the lower end of the second armature 1-10, the middle part of the push rod 1-11 is hingedly connected to the bottom plate 1-1, the lower end of the push rod 1-11 is connected to the contact system 2, and the push rod 1-11 acts on the contact system 2.
[0017] When the coil assembly 1-5 is powered, the magnetic frame 1-2 forms a loop for the magnetic flux generated by the coil assembly 1-5, overcomes the holding force of the magnetic steel 1-6, that is, an electromagnetic attraction is generated at the working air gap, which is greater than the magnetic holding force of the magnetic steel 1-6, so that the iron core 1-8 drives the first armature 1-9 and the second armature 1-10 to move synchronously to the working air gap until they are attached to one side of the magnetic frame 1-2, and in the process, the push rod 1-11 also swings with the movement of the first armature 1-9 and the second armature 1-10, and the moving contact 2-1 of the contact system 2 is in contact or separated from the stationary contact 2-2.
[0018] By setting a new contactor structure, the original restoring spring is replaced by a permanent magnet 1-6, and the holding force of the permanent magnet 1-6 magnetic flux transmitted to the armature, so that the contacts can still be attracted after the coil is powered off, thereby making the contactor not need to be powered continuously when working, saving power. In addition, the application forms a loop for the magnetic flux generated by the coil by using the magnetic frame 1-2, so that the first armature 1-9 or the second armature 1-10 at both ends of the iron core 1-8 outside the coil forms a working air gap with the magnetic frame, and when the different lead-out ends of the coil assembly are powered, the first armature 1-9 and the second armature 1-10 can move under the action of electromagnetic attraction and be attracted to the inner side of the magnetic frame 1-2, thereby completing the contact or separation of the contacts.
[0019] Further, the upper end of the push rod 1-11 is a double-ear structure, the lower end of the second armature 1-10 is located between the double-ear structure and is hinged to the double-ear structure through a pin shaft, so that the push rod 1-11 can change the angle when the first armature 1-9 and the second armature 1-10 move with the iron core 1-8, thereby facilitating the application of a certain force to the contact system 2.
[0020] Further, the contact system 2 comprises a base plate 2-3 fixed below the bottom plate 1-1, the upper end of the base plate 2-3 is fixed with the bottom plate 1-1 through screws, the middle part of the push rod 1-11 is hinged with two installation plates 1-12 protruding from the lower end surface of the bottom plate 1-1 through a pin shaft, and the push rod 1-11 is located between the installation plates 1-12, and the bottom plate 1-1 and the installation plate 1-12 are integrally formed; the middle part of the upper end surface of the base plate 2-3 is provided with a guide groove 2-4 parallel to the iron core 1-8, and a sliding block 2-5 hinged with the lower end of the push rod 1-11 through a pin shaft is slidably arranged in the guide groove 2-4, the push rod 1-11 can rotate around the installation plate 1-12, thereby exerting force on the sliding block 2-5. The sliding block 2-5 is provided with a movable contact 2-1 at the end of a movable spring 2-6, and the upper end surface of the base plate 2-3 is provided with a static spring 2-7 opposite to the movable contact 2-1 and provided with a static contact 2-2, the push rod 1-11 swings to drive the sliding block 2-5 to slide in the guide groove 2-4, drives the movable spring 2-6 to move, and makes the movable contact 2-1 contact or separate from the static contact 2-2.
[0021] Further, a pair of movable springs 2-6, each provided with the movable contact 2-1 at both ends of the outer side and oppositely arranged, are clamped in the inner cavity of the sliding block 2-5, and a spring 2-9 is arranged between the pair of movable springs 2-6 through an insulating block 2-8, the spring 2-9 provides an overstroke of the movable contact 2-1, and keeps reliable contact between the movable contact 2-1 and the static contact 2-2; the upper end surface of the base plate 2-3 is provided with four static springs 2-7 respectively opposite to the movable contact 2-1 and provided with the static contact 2-2, forming four pairs of two groups of contacts; the push rod 1-11 swings to drive the sliding block 2-5 to slide in the guide groove 2-4, drives a pair of movable springs 2-6 to move, and makes the four pairs of movable contacts 2-1 contact or separate from the opposite static contacts 2-2, completing the conversion of the two groups of contacts.
[0022] In the embodiment of the application, the contact contact form of the contactor is one group of movable contacts, one group of movable contacts, and the switching function of the external control circuit is realized.
[0023] Further, four output lead-out ends 2-10, a common input lead-out end 2-11, a first input lead-out end 2-12 and a second input lead-out end 2-13 are welded on the base plate 2-3, the common input lead-out end 2-11, the first input lead-out end 2-12 and the second input lead-out end 2-13 are electrically connected with the coil assembly 1-3, and by applying power to the common input lead-out end 2-11 and the first input lead-out end 2-12 or the second input lead-out end 2-13 respectively, the coil generates electromagnetic attraction in two directions, realizing two working states.
[0024] Four output terminals 2-10 are respectively electrically connected with four static reeds 2-7 and integrally formed, and are fixed on the substrate 2-3 through a plastic packaging process, and an external circuit of the contactor is electrically connected with the output terminals 2-10, so that the opening and closing of the external circuit is controlled by the on-off of the contact.
[0025] Further, the contactor further comprises a cover 3 fixed with the substrate 2-3, and the electromagnetic system 1 and the contact system 2 are arranged in the cover 3, so that the contactor is prevented from dust, moisture and salt spray, and the influence of the external environment on the internal mechanism of the contactor is isolated.
[0026] The working principle of the inhaled bistable magnetic latching contactor in the embodiment of the application is as follows: Please refer to Figures 9-10 When pulse voltage excitation is applied to the common input terminal 2-11 and the first input terminal 2-12, the coil generates magnetic flux in the electromagnetic system 1 in the opposite direction of the magnetic circuit 1 of the magnetic steel, under the action of the magnetic flux, a certain size and direction of electromagnetic suction force is generated at the corresponding working air gap, and the magnetic latching force of the magnetic steel 1-6 is overcome, so that the riveted first armature 1-9, the second armature 1-10 and the iron core 1-8 move towards the working air gap, that is, move towards the door-shaped magnetic yoke 1-2 opposite to the first armature 1-9, in the movement process, the push rod 1-11 hinged with the second armature 1-10 drives the dynamic reed 2-6 in the inner cavity of the slider 2-5 to move in the movement direction of the slider 2-5, until the first armature 1-9 is attracted to the door-shaped magnetic yoke 1-2, at this time, the No. 3 static contact 2-2 and the No. 4 static contact 2-2 are attracted to the corresponding movable contact 2-1; when the common input terminal 2-11 and the first input terminal 2-12 are de-excited, the coil is in a de-energized state, and the first armature 1-9 still maintains the attraction with the door-shaped magnetic yoke 1-2 by the magnetic latching force of the magnetic steel 1-6, and the attraction state of the No. 3 static contact 2-2 and the No. 4 static contact 2-2 with the corresponding movable contact 2-1 is maintained, and the release state of the No. 5 static contact 2-2 and the No. 6 static contact 2-2 with the corresponding movable contact 2-1 is maintained.
[0027] When the common input terminal 2-11 and the second input terminal 2-13 are pulsed with a voltage excitation, the coil generates a magnetic flux opposite to the magnetic circuit 2 in the electromagnetic system 1, under the action of the magnetic flux, a certain size and direction of electromagnetic attraction is generated at the corresponding working air gap, and the magnetic retaining force of the magnetic steel 1-6 is overcome, so that the riveted first armature 1-9, the second armature 1-10 and the core 1-8 move towards the working air gap, i.e. towards the door-shaped magnetic yoke 1-2 opposite to the second armature 1-10, in the movement process, the push rod 1-11 hinged to the second armature 1-10 drives the moving spring 2-6 in the inner cavity of the slider 2-5 to move in the direction of the slider 2-5, until the second armature 1-10 is attracted to the door-shaped magnetic yoke 1-2, at this time, the No. 5 static contact 2-2 and the No. 6 static contact 2-2 are attracted to the corresponding moving contact 2-1; when the common input terminal 2-11 and the second input terminal 2-13 are de-excited, the coil is in a power-off state, and the second armature 1-10 still keeps the attraction with the door-shaped magnetic yoke 1-2 by the magnetic retaining force of the magnetic steel 1-6, the No. 5 static contact 2-2 and the No. 6 static contact 2-2 keep the attraction state with the corresponding moving contact 2-1, and the No. 3 static contact 2-2 and the No. 4 static contact 2-2 keep the release state with the corresponding moving contact 2-1.
[0028] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered as falling within the protection scope of the present application.
Claims
1. A suction-type bistable magnetic latching contactor, characterized in that: The invention comprises an electromagnetic system and a contact system located below the electromagnetic system. The electromagnetic system comprises a base plate, a gate-shaped magnetic conductive frame and a yoke are fixed above the base plate, and the yoke is located in the gate-shaped magnetic conductive frame; a magnetic conductive plate is installed at the open end of the yoke, a coil assembly is horizontally arranged in the inner cavity of the yoke, and one end of the coil assembly is installed at the closed end of the yoke and the other end is installed at the magnetic conductive plate; a magnetic steel is arranged between the top of the yoke and the gate-shaped magnetic conductive frame; An iron core is movably inserted into the center hole of the coil assembly, and a first armature and a second armature are fixed to both ends of the iron core, respectively. The first armature is located between the gate-shaped magnetic conductive frame and the closed end of the yoke, and the second armature is located between the gate-shaped magnetic conductive frame and the magnetic conductive plate, so that a working air gap exists between the first and second armatures and the gate-shaped magnetic conductive frame. A push rod is hingedly connected to the lower end of the second armature, and the middle portion of the push rod is hingedly connected to the bottom plate, and the lower end is connected to the contact system. The gate-shaped magnetic frame forms a loop with the magnetic flux generated by the excitation of the coil assembly, overcomes the holding force of the magnetic steel, causes the iron core to move, drives the first armature and the second armature to move synchronously, and then drives the push rod to swing, controlling the contact or separation of the moving contact and the static contact of the contact system.
2. The suction-type bistable magnetic latching contactor according to claim 1, characterized in that: The upper end of the push rod is a double-ear structure, and the lower end of the second armature is located between the double-ear structures and is hinged to the double-ear structures through a pin.
3. The suction-type bistable magnetic latching contactor according to claim 1, characterized in that: The contact system includes a base plate fixed below the bottom plate, a guide groove parallel to the iron core is provided in the middle of the upper end surface of the base plate, a slider hinged to the lower end of the push rod is slidably provided in the guide groove; a moving spring piece with the moving contact at the end is provided on the slider, and a static spring piece opposite to the moving contact and with the static contact is provided on the upper end surface of the base plate. The swing of the push rod drives the slider to slide in the guide groove, drives the moving spring piece to move, and makes the moving contact contact or separation with the static contact.
4. The suction-type bistable magnetic latching contactor according to claim 3, characterized in that: A pair of moving springs are clamped in the inner cavity of the slider, and a spring is provided between the pair of moving springs through an insulating block. The outer sides of both ends of the moving springs are provided with moving contacts. The upper end surface of the substrate is provided with four static springs respectively opposite to the moving contacts and with static contacts, forming four pairs of two groups of contacts; the swing of the push rod drives the slider to slide in the guide groove, driving a pair of moving springs to move, so that the four pairs of moving contacts are in contact with or separated from the static contacts, completing the conversion of the two groups of contacts.
5. The suction-type bistable magnetic latching contactor according to claim 4, characterized in that: The substrate is provided with a common input lead-out terminal, a first input lead-out terminal, a second input lead-out terminal and four output lead-out terminals. The common input lead-out terminal, the first input lead-out terminal and the second input lead-out terminal are all electrically connected to the coil assembly, and the four output lead-out terminals are respectively electrically connected to the static spring sheets.
6. The suction-type bistable magnetic latching contactor according to claim 4, characterized in that: The contactor comprises a cover shell, the cover shell is fixed to the substrate, and the electromagnetic system and the contact system are both arranged in the cover shell.