CN210692472U - Permanent magnetic mechanism - Google Patents
Permanent magnetic mechanism Download PDFInfo
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- CN210692472U CN210692472U CN201921933766.XU CN201921933766U CN210692472U CN 210692472 U CN210692472 U CN 210692472U CN 201921933766 U CN201921933766 U CN 201921933766U CN 210692472 U CN210692472 U CN 210692472U
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- iron core
- movable iron
- guide rod
- upper guide
- switching
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model relates to an electromagnetic control device, concretely relates to permanent magnetic mechanism who uses in electric power system height, well, low voltage circuit breaker, contactor. The magnetic switch comprises an upper magnetic conduction plate, a lower magnetic conduction plate, an upper guide rod, a lower guide rod, a movable iron core and a switching-off spring, wherein the upper part of the movable iron core is sleeved with a switching-on coil, the lower part of the movable iron core is sleeved with a switching-off coil, and a permanent magnet is arranged between the switching-on coil and the switching-off coil on the outer wall of the movable iron core; the movable iron core is characterized by further comprising a supporting arm, the upper guide rods fixedly connected with the movable iron core are two symmetrically arranged upper guide rods, the upper ends of the two symmetrically arranged upper guide rods are respectively fixedly connected with the supporting arm, a connecting portion used for connecting an insulator is arranged on the supporting arm, and a contact spring is arranged between the insulator and the supporting arm. The linear driving is realized, and the synchronism and operability of three-stage actions are more reliable; the movable iron core has simpler structure and low manufacturing cost, thereby reducing the selling price of the product and improving the market competitiveness.
Description
Technical Field
The utility model relates to an electromagnetic control device specifically is a permanent magnetism mechanism who uses in electric power system height, well, low voltage circuit breaker, contactor.
Background
The permanent magnet mechanism used in the high, medium and low voltage circuit breakers and contactors in the existing power system is generally that each switching tube is linearly driven by one permanent magnet mechanism and synchronous control is realized by electronic technology. The method for realizing the synchronous control of the linear drive through the electronic technology has great technical difficulty and the product using the permanent magnetic mechanism has high selling price. Therefore, the application of the product in general occasions causes the cost performance to be too high and too low, and the product is not easy to be accepted by the public users.
And a permanent magnet mechanism synchronously drives a plurality of switching tubes by rotating a crank arm. The linear driving can be realized only by adding a guide device through rotating the crank arm to realize synchronous driving, so that the structure is complex, the energy loss is large, and the working reliability and the stability are far inferior to those of the linear driving.
In order to solve the above problems, a "permanent magnet circuit breaker" is provided in chinese patent No. 200620023760.5. The upper portion of the movable iron core is provided with three upper guide rods, an opening spring and an opening spring adjusting jackscrew are arranged on two sides of the upper guide rod in the middle, an insulator and a contact spring are installed on the upper portion of the upper guide rod, a manual release is arranged on the lower portion of the movable iron core and corresponds to the upper guide rod, and a closing coil and a permanent magnet are arranged on two sides of the movable iron core.
The structure is provided with the three upper guide rods which are respectively connected with the insulator and the contact spring, so that the synchronism is unreliable; the upper guide rod and the lower guide rod are integrally manufactured, so that the structure is complex, and the processing and manufacturing cost is high; and the permanent magnetic mechanism with the structure has higher energy consumption when in action.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem of the existing permanent magnetic mechanism, the utility model provides a permanent magnetic mechanism which has wide application range, reliable linear driving synchronism, simpler structure and lower cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a permanent magnetic mechanism comprises an upper magnetic conductive plate, a lower magnetic conductive plate, an upper guide rod, a lower guide rod, a movable iron core and a switching-off spring, wherein the upper part of the movable iron core is sleeved with a switching-on coil, the lower part of the movable iron core is sleeved with a switching-off coil, and a permanent magnet is arranged between the switching-on coil and the switching-off coil on the outer wall of the movable iron core; move fixedly connected with guide bar on the iron core, be equipped with down guide arm and manual release in permanent magnetic mechanism lower part, the iron core is moved in separating brake spring one end connection, and magnetic conduction board is connected to one end, still includes the trailing arm, move iron core fixed connection's last guide bar for two symmetries set up, the upper end of the last guide bar that the bisymmetry set up respectively with trailing arm fixed connection is equipped with the connecting portion that are used for connecting the insulator on the trailing arm, is provided with contact spring between insulator and the trailing arm.
Compared with the prior art, the beneficial effects of the utility model are that:
two upper guide rods are used as driving rods to drive the supporting arms, so that linear driving is realized, and the synchronism and operability of three-stage actions are more reliable; the utility model discloses move the structure that the iron core compares with moving among the prior art simpler, the preparation low cost of iron core, consequently also reduced the selling price of product, improved market competition.
The utility model discloses can also make further improvement, the improvement scheme is as follows:
the lower end and the lower end of the upper guide rod are both shaft heads with external threads on the outer walls, the middle part of the upper end and the lower end of the guide rod in the connection process is an optical axis, and the diameter of the optical axis is larger than that of the shaft heads at the two ends; a stepped hole for installing an upper guide rod is formed in the movable iron core, an unthreaded hole is formed in the upper portion of the stepped hole, the diameter of the unthreaded hole is larger than that of the optical axis, a threaded hole is formed in the lower portion of the stepped hole, and the threaded hole is in threaded connection with the lower shaft head of the upper guide rod; the bracket arm is provided with a through hole for fixedly connecting the upper guide rod, the upper end shaft head of the upper guide rod penetrates through the through hole of the bracket arm, and the upper guide rod and the bracket arm are fastened by a nut on the upper end shaft head.
The diameter of a unthreaded hole at the upper part of the stepped hole is larger than the major diameter of the opening spring, and the minor diameter of the opening spring is larger than the diameter of the optical axis of the upper guide rod; the opening spring is arranged in the movable iron core stepped hole and sleeved on the upper guide rod.
And a positioning groove of the opening spring is arranged at the position of the upper magnetic conduction plate corresponding to the stepped hole of the movable iron core.
Drawings
FIG. 1 is a schematic view of the cross-sectional structure and the installation and use of the embodiment of the present invention;
in the figure, an upper guide rod 1; a shaft head 1-2; an upper magnetic conduction plate 2; positioning a groove 2-1; a movable iron core 3; a stepped hole 3-1; a closing coil 4; a permanent magnet 5; a lower magnetic conductive plate 6; a manual release 7; a lower guide bar 8; a switching tube 9; an insulator 10; a contact spring 11; a bracket arm 12; a through hole 12-1; a connecting portion 12-2; a switching-off spring 13; and a switching-off coil 14.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the permanent magnetic mechanism provided by the present invention mainly comprises an upper guide bar 1, a shaft head 1-2, an upper magnetic conductive plate 2, a positioning groove 2-1, a movable iron core 3, a stepped hole 3-1, a closing coil 4, a permanent magnet 5, a lower magnetic conductive plate 6, a manual release 7, a lower guide bar 8, a support arm 12, a through hole 12-1, a connecting portion 12-2, a tripping spring 13, a tripping coil 14, etc.
The upper part of the movable iron core 3 is sleeved with a closing coil 4, the lower part of the movable iron core 3 is sleeved with an opening coil 14, and a permanent magnet 5 is arranged between the closing coil 4 and the opening coil 14 on the outer wall of the movable iron core 3; the movable iron core 3 is fixedly connected with an upper guide rod 1, the lower part of the permanent magnetic mechanism is provided with a lower guide rod and a manual release 7, one end of a separating spring 13 is connected with the movable iron core 3, and the other end is connected with an upper magnetic conduction plate 2.
The upper guide rods 1 fixedly connected with the movable iron core 3 are two upper guide rods 1 symmetrically arranged, the upper ends of the two upper guide rods 1 symmetrically arranged are respectively and fixedly connected with the supporting arm 12, the supporting arm 12 is provided with a connecting part 12-2 used for connecting the insulator 10, and a contact spring is arranged between the insulator 10 and the supporting arm 12. The upper guide rod 1 penetrates through the upper magnetic conduction plate 2 and is connected with the upper magnetic conduction plate 2 in a sliding mode, and can do linear motion freely up and down in the upper magnetic conduction plate 2 under the action of electromagnetic force and the opening spring 13. The upper magnetic conduction plate 2 and the lower magnetic conduction plate 6 are shells of the permanent magnet mechanism in the embodiment; the distance between the upper magnetic conduction plate 2 and the lower magnetic conduction plate 6 is larger than the height of the movable iron core 3.
Meanwhile, the bracket arm 12 is used for converting the respective linear motion of the two upper guide rods 1 into the independent linear motion of the bracket arm 12; therefore, the three switching tubes 9 are linearly driven, and the synchronism and operability of three-stage actions are more reliable. Therefore, the problem of difficult synchronization in the prior art is solved.
Preferably, the lower end and the upper end of the upper guide rod 1 are both shaft heads 1-2 with external threads on the outer walls, the middle part of the upper end and the lower end in the connection of the guide rods is an optical axis, and the diameter of the optical axis is larger than that of the shaft heads 1-2 at the two ends. The movable iron core 3 is provided with a stepped hole 3-1 used for installing the upper guide rod 1, the upper part of the stepped hole 3-1 is a unthreaded hole, the diameter of the unthreaded hole is larger than that of the optical axis, the lower part of the stepped hole is a threaded hole, and the threaded hole is in threaded connection with the lower end shaft head 1-2 of the upper guide rod 1. The bracket arm 12 is provided with a through hole 12-1 for fixedly connecting the upper guide rod 1, the upper end shaft head 1-2 of the upper guide rod 1 penetrates through the through hole 12-1 of the bracket arm 12, and the upper guide rod 1 and the bracket arm 12 are fastened by a nut on the upper end shaft head 1-2.
In the optimization, the upper end of the upper guide rod 1 and the supporting arm 12 as well as the lower end of the upper guide rod 1 and the movable iron core 3 are connected by detachable threads, so that the synchronism of the driving supporting arm 12 can be adjusted by threads while the assembly and disassembly are facilitated, and the synchronism of three-level actions and the reliability of operation are further improved.
Preferably, the diameter of the unthreaded hole at the upper part of the stepped hole 3-1 is larger than the major diameter of the opening spring 13, and the minor diameter of the opening spring 13 is larger than the diameter of the optical axis of the upper guide rod 1; the opening spring 13 is arranged in the stepped hole of the movable iron core 3 and sleeved on the upper guide rod 1.
The opening spring 13 is sleeved on the upper guide rod 1, compared with the prior art, the work of processing holes on the movable iron core 3 is reduced, the structural complexity of the movable iron core 3 is simplified, and the processing and manufacturing cost of the movable iron core 3 is reduced; meanwhile, the opening spring 13 is sleeved on the upper guide rod 1, so that the acting force of the opening spring 13 is more stable and effective, and the influence on the synchronism of the linear drive caused by the error of the installation position of the opening spring 13 is reduced.
Preferably, a positioning groove 2-1 of the opening spring 13 is arranged at a position of the upper magnetic conductive plate 2 corresponding to the stepped hole 3-1 of the movable iron core 3.
The positioning groove 2-1 of the opening spring 13 is arranged on the upper magnetic conduction plate 2, so that the installation and the positioning of the opening spring 13 are facilitated.
Preferably, the bracket 12 is a through hole perpendicular to the front surface of the bracket 12, and is used for connecting the connecting portion 12-1 of the insulator 10. The support wall 12 and the insulator 10 are connected by a pin (or a dowel) passing through the connecting portion 12-1 (a through hole).
The upper end of the lower guide rod 8 is fixedly connected with the movable iron core 3 through threads, and the lower guide rod 8 is connected with the lower magnetic conduction plate 6 in a sliding mode. The structure facilitates the disassembly between the lower guide rod 8 and the movable iron core 3; the lower guide rod 8 is connected with the lower magnetic conduction plate 6 in a sliding way, so that the movable iron core 3 can realize the up-and-down linear motion.
Two driving rods (upper guide rods 1) are arranged on the same movable iron core 3, and the two upper guide rods 1 are respectively sleeved with a brake separating spring 13, so that the effective attraction area of the movable iron core is increased, a permanent magnet mechanism is simplified, and the cost is reduced.
The utility model discloses a closing when closing coil 4 in the permanent magnetic mechanism is electrified; when the opening coil 14 is electrified, the opening is realized under the combined action of electromagnetic force and elastic restoring force of the opening spring 13; and the design of no burning after long-term electrification is realized while copper materials and space are saved.
Use the embodiment of the utility model provides a during the operation: when moving upwards, the movable iron core 3 compresses the opening spring 13 and enables the switching tube 9 to be closed through the upper guide rod 1, the contact spring 11 and the insulator 10, and when moving downwards, the switching tube 9 is opened through the upper guide rod 1 and the insulator 10 under the combined action of the opening spring 13 and the reverse electromagnetic force. An upper guide rod on the upper part of the permanent magnetic mechanism is connected with an insulator 10 and a contact spring 11 through a supporting arm 12, and a manual release 7 and a lower guide rod 8 of the manual release 7 are arranged on the lower part of the permanent magnetic mechanism to form a complete permanent magnetic mechanism for driving closing and opening.
Claims (5)
1. A permanent magnetic mechanism comprises an upper magnetic conductive plate, a lower magnetic conductive plate, an upper guide rod, a lower guide rod, a movable iron core and a switching-off spring, wherein the upper part of the movable iron core is sleeved with a switching-on coil, the lower part of the movable iron core is sleeved with a switching-off coil, and a permanent magnet is arranged between the switching-on coil and the switching-off coil on the outer wall of the movable iron core; move fixedly connected with guide bar on the iron core, be equipped with down guide arm and manual release in permanent magnetic mechanism lower part, the iron core is moved in the connection of separating brake spring one end, and magnetic conduction board, its characterized in that are connected to one end: the movable iron core is characterized by further comprising a supporting arm, the upper guide rods fixedly connected with the movable iron core are two symmetrically arranged upper guide rods, the upper ends of the two symmetrically arranged upper guide rods are respectively fixedly connected with the supporting arm, a connecting portion used for connecting an insulator is arranged on the supporting arm, and a contact spring is arranged between the insulator and the supporting arm.
2. A permanent magnet mechanism according to claim 1, characterized in that: the lower end and the lower end of the upper guide rod are both shaft heads with external threads on the outer walls, the middle part of the upper end and the lower end of the guide rod in the connection process is an optical axis, and the diameter of the optical axis is larger than that of the shaft heads at the two ends; a stepped hole for installing an upper guide rod is formed in the movable iron core, an unthreaded hole is formed in the upper portion of the stepped hole, the diameter of the unthreaded hole is larger than that of the optical axis, a threaded hole is formed in the lower portion of the stepped hole, and the threaded hole is in threaded connection with the lower shaft head of the upper guide rod; the bracket arm is provided with a through hole for fixedly connecting the upper guide rod, the upper end shaft head of the upper guide rod penetrates through the through hole of the bracket arm, and the upper guide rod and the bracket arm are fastened by a nut on the upper end shaft head.
3. A permanent magnet mechanism according to claim 2, characterized in that: the diameter of a unthreaded hole at the upper part of the stepped hole is larger than the major diameter of the opening spring, and the minor diameter of the opening spring is larger than the diameter of the optical axis of the upper guide rod; the opening spring is arranged in the movable iron core stepped hole and sleeved on the upper guide rod.
4. A permanent magnet mechanism according to claim 3, characterized in that: and a positioning groove of the opening spring is arranged at the position of the upper magnetic conduction plate corresponding to the stepped hole of the movable iron core.
5. A permanent magnet mechanism according to any one of claims 1 to 4, characterized in that: the bracket arm is used for connecting the connecting part of the insulator and is a through hole vertical to the front surface of the bracket arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921933766.XU CN210692472U (en) | 2019-11-11 | 2019-11-11 | Permanent magnetic mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921933766.XU CN210692472U (en) | 2019-11-11 | 2019-11-11 | Permanent magnetic mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210692472U true CN210692472U (en) | 2020-06-05 |
Family
ID=70897580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921933766.XU Active CN210692472U (en) | 2019-11-11 | 2019-11-11 | Permanent magnetic mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210692472U (en) |
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2019
- 2019-11-11 CN CN201921933766.XU patent/CN210692472U/en active Active
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