Electromagnetic structure of direct current contactor

Abstract

The utility model provides an electromagnetic structure of a DC contactor. The electromagnetic structure comprises a housing assembly and a contact assembly. The shell assembly comprises a cylinder body, a coil layer and a magnetic conductive cylinder which are sequentially arranged from outside to inside; the contact assembly comprises an iron core, a push rod, a first mounting seat and a moving contact, the iron core is embedded in the magnetic conductive cylinder, a stroke gap is formed between the iron core and the upper end of the magnetic conductive cylinder, the lower end of the push rod is arranged in the iron core, the upper end of the push rod extends upwards to exceed the magnetic conductive cylinder, and the moving contact is connected to the upper end of the push rod through the first mounting seat; when the coil layer is in a power-on or power-off state, the moving contact can move upwards or downwards along the stroke gap through the iron core. According to the electromagnetic structure of the direct current contactor, the problem that the electromagnetic structure of the existing direct current contactor is poor in use effect and even scrapped due to the fact that the coil layer is easy to deform and affects the movement of the iron core can be solved.

Description

Technical Field

[0001] The utility model belongs to the field of contactors, and more specifically relates to an electromagnetic structure of a DC contactor. Background Art

[0002] DC contactor is a power control device, which is widely used in power system, automation control system, communication equipment and power electronics. Its function is to realize switch control in DC circuit, so as to realize the control of circuit current. With the wide application of DC contactor, the performance requirements for DC contactor are getting higher and higher.

[0003] When the DC contactor is in use, the contact assembly is set in the coil layer, and the magnetic field generated after the coil layer is energized is used to drive the contact assembly to move up and down, so that the moving contact in the contact assembly contacts the static contact set at the upper end of the DC contactor to achieve the conduction of the DC circuit. However, in the electromagnetic structure of the existing DC contactor, the coil layer is mainly composed of plastic material, which will be deformed by temperature, causing the iron core to be stuck and unable to move. In addition, the iron core in the contact assembly is guided by the coil layer when moving, and the friction of the iron core will also cause damage to the coil layer, thereby affecting the coordination between the iron core and the coil layer, resulting in poor use of the DC contactor or even scrapping.

[0004] Therefore, the electromagnetic structure of the existing DC contactor has great limitations when used, has a low utilization rate, and still needs further improvement. Utility Model Content

[0005] The utility model aims to solve the problem that the electromagnetic structure of the existing DC contactor is affected by the movement of the iron core due to the easy deformation of the coil layer, resulting in poor use effect or even scrapping.

[0006] In order to achieve the above object, the utility model provides an electromagnetic structure of a DC contactor, including a housing assembly and a contact assembly;

[0007] The housing assembly comprises a cylinder, a coil layer and a magnetic conductive cylinder which are arranged in sequence from the outside to the inside;

[0008] The contact assembly comprises an iron core, a push rod, a first mounting seat and a moving contact, wherein the iron core is embedded in the magnetic conductive cylinder and has a travel gap with the upper end of the magnetic conductive cylinder, the lower end of the push rod is arranged in the iron core, and the upper end thereof extends upward to exceed the magnetic conductive cylinder, and the moving contact is connected to the upper end of the push rod through the first mounting seat;

[0009] When the coil layer is in an energized or de-energized state, the moving contact can move upward or downward along the travel gap through the iron core.

[0010] Optionally, the moving contact is sleeved on the lower end of the first mounting seat to isolate the moving contact from the push rod.

[0011] Optionally, a buffer spring for buffering the movement of the moving contact is connected to the lower end of the moving contact.

[0012] Optionally, the lower end of the buffer spring is connected to a second mounting seat.

[0013] Optionally, a gasket and an open retaining ring are provided at one end of the first mounting seat and the second mounting seat away from the buffer spring, so as to fix the first mounting seat and the second mounting seat.

[0014] Optionally, a yoke iron plate is provided at the upper end of the coil layer for confining the magnetic field generated by the coil layer within the cylinder.

[0015] Optionally, a return spring is sleeved on the lower end of the push rod, the upper end of the return spring is connected to the yoke iron plate, and the lower end of the return spring is connected to the iron core.

[0016] The beneficial effects of the utility model are:

[0017] The electromagnetic structure of the DC contactor proposed by the utility model can avoid direct contact between the iron core and the coil layer by arranging a magnetic conductive cylinder in the coil layer so that the iron core moves guided by the magnetic conductive cylinder, thereby reducing the influence of the deformation of the coil layer on the movement of the contact assembly to ensure the normal use of the DC contactor. Compared with the existing DC contactor, the electromagnetic structure of the DC contactor of the utility model can effectively avoid the influence of the coil layer being deformed by force and the like on the movement of the iron core by adding the magnetic conductive cylinder, thereby improving the utilization rate of the DC contactor and extending its service life.

[0018] According to the above content, the utility model can effectively solve the problem that the electromagnetic structure of the existing DC contactor is affected by the deformation of the coil layer, which affects the movement of the iron core, resulting in poor use effect or even scrapping.

[0019] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention may be better understood by referring to the following description in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to represent the same or similar components.

[0021] Figure 1 An exploded schematic diagram of an electromagnetic structure of a DC contactor according to an embodiment of the utility model is shown;

[0022] Figure 2 The schematic diagram of the structure of the electromagnetic structure of the DC contactor according to the embodiment of the utility model is shown.

[0023] Reference numerals:

[0024] 1-Cylinder;

[0025] 2- coil layer;

[0026] 3-magnetic cylinder;

[0027] 4- Iron core;

[0028] 5- Push rod;

[0029] 6- first mounting seat;

[0030] 7- moving contact;

[0031] 8-buffer spring;

[0032] 9- second mounting seat;

[0033] 10- gasket;

[0034] 11-opening retaining ring;

[0035] 12- yoke iron plate;

[0036] 13-Return spring. DETAILED DESCRIPTION

[0037] In order to enable technicians in the relevant technical field to more fully understand the technical solution of the utility model, the exemplary implementation of the utility model will be described in more comprehensive and detailed in conjunction with the accompanying drawings below. Obviously, the one or more implementations of the utility model described below are only one or more of the specific ways to implement the technical solution of the utility model, and are not exhaustive. It should be understood that other ways belonging to a general utility model concept can be used to implement the technical solution of the utility model, and should not be limited by the exemplary description of the implementation. Based on one or more implementations of the utility model, all other implementations obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the utility model.

[0038] Example: Figure 1 An exploded schematic diagram of an electromagnetic structure of a DC contactor according to an embodiment of the utility model is shown; Figure 2 The schematic diagram of the structure of the electromagnetic structure of the DC contactor according to the embodiment of the utility model is shown.

[0039] Reference Figure 1-2, an embodiment of the utility model provides an electromagnetic structure of a DC contactor, including a housing assembly and a contact assembly;

[0040] The housing assembly comprises a cylinder 1, a coil layer 2 and a magnetic conductive cylinder 3 which are arranged in sequence from the outside to the inside;

[0041] The contact assembly includes an iron core 4, a push rod 5, a first mounting seat 6 and a moving contact 7. The iron core 4 is embedded in the magnetic tube 3 and has a travel gap with the upper end of the magnetic tube 3. The lower end of the push rod 5 is arranged in the iron core 4, and the upper end thereof extends upward to exceed the magnetic tube 3. The moving contact 7 is connected to the upper end of the push rod 5 through the first mounting seat 6.

[0042] When the coil layer 2 is in an energized or de-energized state, the moving contact 7 can move upward or downward along the travel gap through the iron core 4 .

[0043] In a specific embodiment, the magnetic tube 3 is a cylindrical structure made of iron material. Specifically, the strength of the iron magnetic tube is greater than the strength of the coil layer made of plastic material, so that the deformation and friction damage of the coil layer can be effectively avoided to affect the movement of the iron core, so as to ensure the normal operation of the DC contactor.

[0044] In one embodiment, the moving contact 7 is sleeved on the lower end of the first mounting seat 6 to isolate the moving contact 7 from the push rod 5. Specifically, the moving contact is isolated from the push rod, which can effectively prevent voltage breakdown and ensure the normal use of the moving contact and the push rod.

[0045] In one embodiment, a buffer spring 8 is connected to the lower end of the moving contact 7 for buffering the movement of the moving contact 7 .

[0046] In one embodiment, the lower end of the buffer spring 8 is connected to a second mounting seat 9 .

[0047] In one embodiment, a gasket 10 and an open retaining ring 11 are provided at one end of the first mounting seat 6 and the second mounting seat 9 away from the buffer spring 8 to fix the first mounting seat 6 and the second mounting seat 9 .

[0048] In one embodiment, a yoke iron plate 12 is provided at the upper end of the coil layer 2 for enclosing the magnetic field generated by the coil layer 2 in the cylinder 1, so as to enhance the attraction of the magnetic field and improve the operating efficiency of the iron core.

[0049] In one embodiment, a return spring 13 is sleeved on the lower end of the push rod 5 , the upper end of the return spring 13 is connected to the yoke iron plate 12 , and the lower end of the return spring 13 is connected to the iron core 4 .

[0050] When the electromagnetic structure of the DC contactor of the utility model is in operation, when the coil layer is energized, the coil layer will generate a magnetic field covering the magnetic conductive cylinder and the iron core, so that the iron core moves upward under the influence of the magnetic force. At the same time, the magnetic conductive cylinder will also conduct the magnetic lines of force of the magnetic field upward as the iron core moves, so as to provide sufficient power for the iron core, so that the push rod can move upward with the iron core, so as to move the moving contact upward.

[0051] During this process, the buffer spring will buffer the movement of the moving contact, and when the coil layer is de-energized, the iron core and the push rod move downward. At this time, the reset spring can accelerate the reset of the push rod.

[0052] The electromagnetic structure of the DC contactor proposed by the utility model arranges a magnetic conductive cylinder in the coil layer so that the iron core moves guided by the magnetic conductive cylinder, thereby avoiding direct contact between the iron core and the coil layer, thereby reducing the influence of the deformation of the coil layer on the movement of the contact assembly, so as to ensure the normal use of the DC contactor.

[0053] Furthermore, by sleeve-arranging the moving contact on the lower end of the first mounting seat, the moving contact is isolated from the push rod, which can effectively prevent voltage breakdown and ensure the normal use of the moving contact and the push rod.

[0054] Furthermore, by connecting the upper end of the return spring to the yoke plate, the return spring can limit the yoke plate without the need to fix the yoke plate separately, thereby reducing the weight of the electromagnetic structure and reducing the manufacturing cost of the electromagnetic structure.

[0055] Compared with the existing DC contactors, the electromagnetic structure of the DC contactor of the utility model can effectively prevent the deformation of the coil layer from affecting the movement of the iron core by adding a magnetic conductive cylinder, so as to improve the utilization rate of the DC contactor and extend its service life.

[0056] Although one or more embodiments of the utility model are described above, it should be known to those skilled in the art that the utility model can be implemented in any other form without departing from its subject matter and scope. Therefore, the embodiments described above are illustrative rather than restrictive, and many modifications and substitutions are obvious to those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. An electromagnetic structure of a DC contactor, characterized in that: including a housing assembly and a contact assembly; The housing assembly comprises a cylinder, a coil layer and a magnetic conductive cylinder which are arranged in sequence from the outside to the inside; The contact assembly comprises an iron core, a push rod, a first mounting seat and a moving contact, wherein the iron core is embedded in the magnetic conductive cylinder and has a travel gap with the upper end of the magnetic conductive cylinder, the lower end of the push rod is arranged in the iron core, and the upper end thereof extends upward to exceed the magnetic conductive cylinder, and the moving contact is connected to the upper end of the push rod through the first mounting seat; When the coil layer is in an energized or de-energized state, the moving contact can move upward or downward along the travel gap through the iron core.

2. The electromagnetic structure of the DC contactor according to claim 1, characterized in that: The moving contact is sleeved on the lower end of the first mounting seat to isolate the moving contact from the push rod.

3. The electromagnetic structure of the DC contactor according to claim 2, characterized in that: The lower end of the moving contact is connected with a buffer spring for buffering the movement of the moving contact.

4. The electromagnetic structure of the DC contactor according to claim 3, characterized in that: The lower end of the buffer spring is connected with a second mounting seat.

5. The electromagnetic structure of the DC contactor according to claim 4, characterized in that: A gasket and an open retaining ring are provided at one end of the first mounting seat and the second mounting seat away from the buffer spring, so as to fix the first mounting seat and the second mounting seat.

6. The electromagnetic structure of the DC contactor according to claim 5, characterized in that: A yoke iron plate for confining the magnetic field generated by the coil layer within the cylinder is arranged at the upper end of the coil layer.

7. The electromagnetic structure of the DC contactor according to claim 6, characterized in that: The lower end of the push rod is sleeved with a return spring, the upper end of the return spring is connected to the yoke iron plate, and the lower end of the return spring is connected to the iron core.

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