CN212303572U

CN212303572U - Anti-impact hollow movable iron core of electromagnetic switch

Info

Publication number: CN212303572U
Application number: CN202021267890.XU
Authority: CN
Inventors: 余新洛
Original assignee: Shaanxi Xintong Intelligent Technology Co ltd
Current assignee: Shaanxi Xintong Intelligent Technology Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-01-05
Anticipated expiration: 2030-07-02

Abstract

The utility model belongs to the technical field of electromagnetic switch, a electromagnetic switch protecting against shock cavity moves iron core is related to, move iron core, buffer spring including transfer line, cavity, the inside cylinder type cavity that is equipped with of iron core is moved to cavity, and the iron core cover is moved to cavity is established on the transfer line, and the buffer spring cover is established on the transfer line and is located the cavity and move the cylinder type cavity of iron core, and transfer line, cavity move iron core, buffer spring coaxial. The utility model discloses possess buffer function when having shortened electromagnetic switch's response time, can effectively alleviate the high strength striking of combined floodgate back to the magnetic ring, avoid colliding the problem emergence of splitting two magnetic rings.

Description

Anti-impact hollow movable iron core of electromagnetic switch

Technical Field

The utility model belongs to the technical field of electromagnetic switch, a electromagnetic switch protecting against shock cavity movable iron core is related to.

Background

An electromagnetic switch is a switch controlled by an electromagnet, namely a combination of the electromagnet and the switch. When the electromagnet coil is electrified, electromagnetic attraction is generated, the movable iron core pushes or pulls the switch contact to be closed, and therefore the controlled circuit is switched on. The contact structure of the electromagnetic switch generally adopts a contact form, namely, the moving contact is made into a bridge shape or a disk shape, so that the moving contact has a larger heat dissipation surface and a larger heat capacity. The magnetic system mostly adopts a solenoid electromagnet structure so as to meet the requirements of corresponding stroke, corresponding suction force, small volume and light weight. Electromagnetic switches are widely used in various industries.

Since the end of the seventies of the twentieth century, a.h. seilly of Lucas corporation, uk started the research of high-speed electromagnetic switches, and developed two high-speed electromagnetic switches of special structures, i.e., a helioid valve and a Colenoid valve. The electromagnet of the Helenoid valve is of a solenoid structure, while the electromagnet of the Colenoid valve is of a conical structure. The common characteristic of the two high-speed electromagnetic switches is that the electromagnet with a special structural shape is adopted, so that the contradiction that the armature acceleration is smaller on the contrary when the electromagnetic acting force is larger in the traditional electromagnetic switch is overcome, and the response time of the valve is not more than 1ms when the stroke of the valve core is less than 1 mm. However, the structures of the helioid valve and the Colenoid valve are quite complex, and the machining and manufacturing difficulties and the cost are high. This therefore limits the future practical use of both valves. Meanwhile, g.mansfeld, j.tersteegen, and k.engelsdaf, p.dnken in germany also began to develop and study high-speed electromagnetic switches. The response time of the valves developed by them is around 2ms, and the structure of the valves is quite complex. After that, many foreign scholars and experts have been devoted to the research of the high-speed electromagnetic switch. In 1982, experts in Ford Motor corporation, usa developed an annular multi-pole high-speed electromagnetic switch, and the response time of the valve was 2 ms. United states BKM corporation introduced a three-way ball-shaped cartridge type high-speed electromagnetic switch in 1984. The response time of the valve is reported in the literature to be: the opening time is 3 ms; the off time is 2 ms. In japan, the company Diesel KiKi has developed a high-speed, powerful electromagnetic switch called "diode" in which an electromagnet is in the form of a disc-shaped structure, and the response time when the armature reaches a maximum stroke of 0.4mm in the valve is 0.74 ms. However, the valve is also relatively large. In addition, japanese midland yurt et al developed two high-speed electromagnetic switches around 1984, with response times: the opening time is 3.3 ms; the closing time 2.8ms. and kawasaki faith in japan also propose a high-speed electromagnetic switch of a spherical valve core structure, the opening and closing time of which is 2.5 ms. By the middle of the eighties of the twentieth century, due to the urgent need of an electronic control fuel injection technology of a diesel engine, an ultrahigh-pressure high-speed electromagnetic switch with response time less than 1ms is a hot spot of competitive research of people. According to the literature report, the three-way type ultrahigh-voltage high-speed electromagnetic switch with the opening and closing time of 0.35ms and 0.4ms respectively is successfully developed by the Yangtze-Zheng-Yan-Si in Japan. The german Bosch company has also successfully developed a high speed electromagnetic switch suitable for ultra high pressure operation, with a valve opening time of 0.3ms and a valve closing time of 0.65 ms. The deer zong et al, heavily skilled in kawasaki, japan, written a high speed solenoid switch that they developed, with a valve response time of 1 ms. According to the introduction of documents, the German Daimler-Benz company works with three other companies, and the response time of the novel high-pressure common rail type fuel injection system of the diesel engine developed by the German Daimler-Benz company is 0.2 ms. Compared with foreign countries, the development and research work of the high-speed electromagnetic switch in China starts relatively late, and the work can be roughly divided into two aspects, namely, on one hand, the research of tracking foreign countries and the basic theoretical research of exploring the high-speed response capability of the electromagnetic switch; on the other hand, the high-speed electromagnetic switch model machine and the matched drive control device are developed independently or cooperatively. Among them, typically, the HSV series high-speed electromagnetic switch is developed by cooperation of the Guizhou Honglin machinery factory and the U.S. BKM company and over more than three years of effort. According to the introduction of the literature, the valve is of a threaded cartridge type structure, and the opening time of the valve is 3 ms; the off time is 2 ms. In other documents, the Wangshengong et al of Beijing university of Physician and Huangguan rise et al developed two high-speed electromagnetic switches with different structures before and after 1996 and 1998, respectively. The former valve is a two-way high-speed electromagnetic switch adopting a disc type electromagnet and a cone valve core structure, and the actual measured current curve of the iron core coil of the electromagnetic valve is obtained, the actuation time of the valve is about 1.2ms, and the release time is about 0.4 ms. It can be seen that the response time of most high-speed electromagnetic switches is generally between several ms and several tens ms at present, and the high-speed electromagnetic switch products with the response time of less than 1ms are only reported in a few countries such as japan, the usa, germany and the uk.

With the change of science and technology development in China, the requirements on electromagnetic switches in the aspects of high-speed rail and high-voltage power transmission are higher and higher, and the precision is higher and higher. It is a great improvement to be able to advance the response time of the electromagnetic switch by 0.1ms or even 0.01 ms. However, how the response time of the electromagnetic switch can be shortened. Have been the focus of attention of those skilled in the art of electromagnetic switches.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an electromagnetic switch protecting against shock cavity movable iron core is provided, it with electromagnetic switch's the effectual shortening of response time, improved electromagnetic switch's response efficiency.

The utility model provides a technical scheme that technical problem took is: the utility model provides an electromagnetic switch protecting against shock cavity moves iron core, includes transfer line 1, cavity and moves iron core 2, buffer spring 3, and cavity moves 2 inside cylindrical cavities that are equipped with of iron core, and cavity moves 2 covers of iron core and establishes on transfer line 1, and buffer spring 3 covers establishes on transfer line 1 and is located the cylindrical cavity of cavity and moves iron core 2, and transfer line 1, cavity move iron core 2, buffer spring 3 are coaxial.

Preferably, the cavity moves iron core 2 and includes that the bowl type moves iron 4, and the buffering moves iron 5, lower bowl type moves iron 6, and it moves iron 4 bottom surface and is equipped with concave cavity on the cylinder type to go up the bowl type, and lower bowl type moves iron 6 top surface and is equipped with the concave cavity of cylinder type, goes up bowl type and moves iron 4, down and moves iron 6 and form the inside cylinder type cavity of cavity and move iron 2 after the lock, and the buffering moves iron 5 and is located the cylinder type cavity that goes into after the lock of last bowl type moves iron 4, lower bowl type and moves iron 6, and the buffering moves iron 5 external diameter and is less than cylinder type cavity internal diameter, goes up bowl type and moves iron 4, and the buffering moves iron 5, lower bowl type and moves iron 6 coaxial.

Preferably, the buffer spring 3 comprises an upper buffer spring 31 and a lower buffer spring 32, the upper buffer spring 31 is located between the upper bowl-shaped moving iron 4 and the buffer moving iron 5, and the lower buffer spring 32 is located between the buffer moving iron 5 and the lower bowl-shaped moving iron 6.

Preferably, the upper concave bottom surface of the upper bowl-shaped moving iron 4, the lower concave top surface of the lower bowl-shaped moving iron 6 and the upper and lower surfaces of the buffer moving iron 5 are all provided with annular grooves 7, and the annular grooves 7 can accommodate the two end surfaces of the buffer spring 3.

Preferably, the buffer moving iron 5 is fixedly connected with the transmission rod 1.

Preferably, gaps are arranged between the upper bowl-shaped moving iron 4 and the lower bowl-shaped moving iron 6 and the transmission rod 1.

The utility model has the advantages that:

1. the utility model adopts the movable iron core with a hollow structure, thereby greatly reducing the weight of the movable iron core, reducing the weight of the movable iron core under the premise of unchanging magnetic force, increasing the acceleration and increasing the speed of the movable iron core after being stressed; therefore, the utility model discloses under the unchangeable circumstances of other parameters, the iron core speed is moved in the increase, the effectual response time who shortens electromagnetic switch has improved electromagnetic switch's response efficiency.

2. When the electromagnetic switch is in a switch-on position, the transmission rod needs to have enough cutting depth to ensure that the contact area meets the requirement, but the closing of the transmission rod is not allowed, the transmission rod is required to have a gap of 3-5 MM from the base of the static contact, otherwise, the support porcelain bottle of the static contact is broken when the switch-on is too violent. The utility model is provided with a buffer spring and a buffer moving iron inside the hollow moving iron core, the buffer moving iron is tightly connected with the transmission rod, gaps are arranged between the upper bowl type moving iron and the transmission rod and between the lower bowl type moving iron and the transmission rod, the buffer spring is positioned between the buffer moving iron and the upper bowl type moving iron and between the buffer moving iron and the lower bowl type moving iron, therefore, after the cutting depth of the transmission rod is enough to ensure that the contact area meets the requirement, the buffer spring can transmit the resistance to the buffer moving iron through the upper bowl-shaped moving iron and the lower bowl-shaped moving iron and then to the transmission rod, and because the larger the compression of the spring is, the larger the resistance is, when the transmission rod reaches the proper cut-in depth of the switch-on, the resistance of the spring is extremely small, along with the transmission rod is closer to the base of the static contact, the resistance of the spring is increased more and more until the transmission rod is spaced from the base of the static contact by the minimum gap, the resistance of the spring is maximized, and the effect of protecting the transmission rod from colliding and cracking the magnetic rings at two ends when the transmission rod is switched on too violently is achieved.

3. The utility model discloses last bowl type moves the last concave bottom surface of iron, down the bowl type moves the recessed top surface of iron and the buffering and moves the upper and lower surface of iron and all be equipped with the annular groove, and the annular groove can hold buffer spring both ends face and put into, and in buffer spring can fall into the annular groove according to the design requirement when having guaranteed assembly and welding, reach the resistance size and the resistance stroke that the transfer line closed a floodgate and require when violent.

Drawings

FIG. 1 is a cross-sectional view of an anti-impact hollow plunger of an electromagnetic switch;

FIG. 2 is a schematic perspective view;

fig. 3 is a snap-fit view of the movable iron core.

In the figure: 1. a transmission rod; 2. a hollow movable iron core; 3. a buffer spring; 4. mounting a bowl-shaped moving iron; 5. buffering the moving iron; 6. a bowl-down moving iron; 7. an annular groove; 8. welding a groove; 31. an upper buffer spring; 32. a lower buffer spring.

Detailed Description

The related art in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is to be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an anti-impact hollow movable iron core of an electromagnetic switch comprises a transmission rod 1, a hollow movable iron core 2 and a buffer spring 3, wherein a cylindrical cavity is arranged inside the hollow movable iron core 2, the hollow movable iron core 2 is sleeved on the transmission rod 1, the buffer spring 3 is sleeved on the transmission rod 1 and is located in the cylindrical cavity of the hollow movable iron core 2, and the transmission rod 1, the hollow movable iron core 2 and the buffer spring 3 are coaxial.

Further, the cavity moves iron core 2 and includes that the bowl type moves iron 4, and the buffering moves iron 5, lower bowl type moves iron 6, and it moves iron 4 bottom surface and is equipped with concave cavity on the cylinder type to go up the bowl type, and lower bowl type moves iron 6 top surface and is equipped with the concave cavity of cylinder type, goes up bowl type and moves iron 4, moves iron 6 lock back and forms the inside cylinder type cavity of cavity and moves iron 2 down, and the buffering moves iron 5 and is located the cylinder type cavity that goes up bowl type and moves iron 4, move iron 6 lock back and form down in the buffer, and the buffering moves iron 5 external diameter and is less than cylinder type cavity internal diameter, goes up bowl type and moves iron 4, and the buffering moves iron 5, bowl type down and moves iron 6 coaxial.

Further, buffer spring 3 includes buffer spring 31 and lower buffer spring 32, and last buffer spring 31 is located between last bowl type moving iron 4 and the buffering moving iron 5, and lower buffer spring 32 is located between buffering moving iron 5 and the lower bowl type moving iron 6.

Furthermore, the upper concave bottom surface of the upper bowl-shaped moving iron 4, the lower concave top surface of the lower bowl-shaped moving iron 6 and the upper and lower surfaces of the buffer moving iron 5 are all provided with annular grooves 7, and the annular grooves 7 can accommodate two end surfaces of the buffer spring 3.

Further, the buffer moving iron 5 is tightly connected with the transmission rod 1.

Further, gaps are arranged between the upper bowl-shaped moving iron 4 and the lower bowl-shaped moving iron 6 and the transmission rod 1.

To sum up, the utility model provides an electromagnetic switch protecting against shock cavity moves iron core and manufacturing method thereof has shortened electromagnetic switch's response time, adopts cavity to move the iron core and adds the method that buffer spring moved the iron with buffering, possesses buffer function, can effectively alleviate the high strength striking to the magnetic ring after the combined floodgate, avoids the problem emergence of the two magnetic rings of fracture. Therefore, the utility model discloses possess extensive application prospect.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides an electromagnetic switch protecting against shock cavity moves iron core, its characterized in that moves iron core (2), buffer spring (3) including transfer line (1), cavity, the cavity moves iron core (2) inside and is equipped with the cylinder type cavity, the cavity moves iron core (2) cover and establishes on transfer line (1), buffer spring (3) cover is established on transfer line (1) and is located the cavity and moves the cylinder type cavity of iron core (2), transfer line (1), cavity are moved iron core (2), buffer spring (3) coaxial.

2. The electromagnetic switch impact-proof hollow movable iron core according to claim 1, characterized in that the hollow movable iron core (2) comprises an upper bowl-shaped movable iron (4), a buffering movable iron (5) and a lower bowl-shaped movable iron (6), wherein the bottom surface of the upper bowl-shaped movable iron (4) is provided with a cylindrical upper concave cavity, the top surface of the lower bowl-shaped movable iron (6) is provided with a cylindrical lower concave cavity, the upper bowl-shaped movable iron (4) and the lower bowl-shaped movable iron (6) are buckled to form the cylindrical cavity inside the hollow movable iron core (2), the buffering movable iron (5) is positioned in the cylindrical cavity formed by the upper bowl-shaped movable iron (4) and the lower bowl-shaped movable iron (6), the outer diameter of the buffering movable iron (5) is smaller than the inner diameter of the cylindrical cavity, the upper bowl-shaped movable iron (4), the buffering movable iron (5) and the lower bowl-shaped movable iron (6) are coaxial.

3. An electromagnetic switch impact-proof hollow movable iron core according to claim 2, characterized in that the buffer spring (3) comprises an upper buffer spring (31) and a lower buffer spring (32), the upper buffer spring (31) is located between the upper bowl-shaped movable iron (4) and the buffer movable iron (5), and the lower buffer spring (32) is located between the buffer movable iron (5) and the lower bowl-shaped movable iron (6).

4. An electromagnetic switch impact-proof hollow movable iron core as claimed in claim 2, characterized in that the upper concave bottom surface of the upper bowl-shaped movable iron (4), the lower concave top surface of the lower bowl-shaped movable iron (6) and the upper and lower surfaces of the buffer movable iron (5) are all provided with an annular groove (7), and the annular groove (7) can accommodate the buffer spring (3) to be put into.

5. An electromagnetic switch impact-proof hollow movable iron core as claimed in claim 2, characterized in that the buffer movable iron (5) is fastened to the transmission rod (1).

6. An anti-impact hollow movable iron core of an electromagnetic switch according to claim 2, characterized in that a gap is provided between the upper bowl-shaped movable iron (4), the lower bowl-shaped movable iron (6) and the transmission rod (1).