Direct-acting high-voltage direct-current contactor
By setting guide posts and positioning plates on the insulating base for guiding cooperation, the problem of moving contact limitation in direct-acting high-voltage DC contactors under limited space conditions is solved, achieving stable contact of the moving contacts and efficient use of space.
Patent Information
- Application Number
- CN202520031391.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-07
AI Technical Summary
When the space inside the insulation cover of an existing direct-acting high-voltage DC contactor is limited, it is difficult to install circumferential limiting ribs on the ceramic cover, which leads to problems such as poor contact or misalignment between the moving and stationary contacts.
A guide post is set on the insulating base, and the circumferential limit of the push rod and the moving contact is achieved by the guiding cooperation between the positioning plate and the guide post, so as to avoid setting ribs on the ceramic cover and reserve space for the layout of other components.
It achieves stable circumferential limiting of the moving contact, avoids misalignment, does not occupy extra space, adapts to more component layouts, and improves the reliability and space utilization of the contactor.
Smart Images
Figure CN223898243U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of contactor, concretely relates to a direct-acting high-voltage direct-current contactor. BACKGROUND
[0002] The direct-acting high-voltage direct-current contactor is a kind of relay, the moving iron core of existing direct-acting high-voltage direct-current contactor is cylindrical, and the moving spring head is rotated in circumferential direction in the movement process, in order to guarantee the good contact of moving contact and static contact, not misplacement, need to limit the circumferential direction of moving contact, and in the prior art, the limiting is mostly realized by extending two relatively long rib strips in the insulating cover (usually ceramic cover).But when auxiliary contact and other structures are arranged in the cavity of insulating cover (i.e. contact cavity), due to space limitation, the rib strip for limiting cannot be increased. Therefore, the limiting structure needs to be redesigned to realize the circumferential limiting of moving contact. SUMMARY
[0003] Therefore, the utility model provides a direct-acting high-voltage direct-current contactor to solve the above problems.
[0004] To achieve the above object, the technical scheme provided by the utility model is as follows:
[0005] A direct-acting high-voltage direct-current contactor, comprising a magnetic circuit part, a contact part, a push rod part and a ceramic cover, an insulating seat is assembled on the yoke iron plate of the magnetic circuit part, and the opening of the ceramic cover covers the insulating seat and is connected with the yoke iron plate, thereby forming a contact cavity;The contact part comprises two static contacts fixed on the ceramic cover and a moving contact arranged in the contact cavity and corresponding to the two static contacts;The push rod part comprises a push rod and a positioning sheet, the magnetic circuit part is drivingly connected with the push rod, the end of the push rod extends into the contact cavity and is connected with the moving contact and the positioning sheet, a guide column is arranged on the insulating seat, the guide column is parallel with the push rod and forms a guide cooperation with the positioning sheet.
[0006] Further, a limiting notch is arranged on the outer side wall of the positioning sheet, and the guide column is fitted in the limiting notch.
[0007] Further, the guide column is a cylinder, and the limiting notch is a circular-arc notch matched with the outer circumferential surface of the guide column.
[0008] Further, the push rod part further comprises a fixing seat, and the fixing seat is integrally formed by injection molding and fixedly connected with the push rod and the positioning sheet.
[0009] Further, an elastic member is further arranged between the fixing seat and the moving contact, and the elastic member applies an elastic force to the moving contact towards the static contact.
[0010] Further, the insulating seat is integrally formed by injection molding and fixedly connected with the guide column.
[0011] Further, the guide column is riveted or adhered on the insulating seat.
[0012] Further, the insulating seat has a central accommodation opening and a plurality of insulating walls distributed around the accommodation opening, the push rod part is movably arranged in the accommodation opening, and the guide column is fixed on the innermost insulating wall.
[0013] Further, the guide column and the positioning sheet are made of wear-resistant materials.
[0014] Further, the guide column is made of metal or ceramic material, and the positioning sheet is made of metal or ceramic material.
[0015] The technical scheme has the following beneficial effects:
[0016] The disclosed scheme sets the positioning sheet on the push rod part and sets the guide column on the insulating seat, realizes the circumferential limiting of the push rod part and the movable contact assembled on the push rod part through the guiding cooperation of the positioning sheet and the guide column, does not need to set the rib on the ceramic cover for limiting, and can reserve more space for other components such as auxiliary contacts. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 Fig. 2 shows a cross section of the direct-acting high-voltage DC contactor in the embodiment; Figure One ;
[0018] Figure 2 Fig. 4 shows a cross section of the direct-acting high-voltage DC contactor in the embodiment; Figure Two ;
[0019] Figure 3 Fig. 6 shows a cross section of the direct-acting high-voltage DC contactor in the embodiment; Figure Three ;
[0020] Figure 4 Fig. 8 shows a structure schematic view of the insulating seat in the embodiment;
[0021] Figure 5 Fig. 10 shows a structure schematic view of the push rod part in the embodiment. DETAILED DESCRIPTION
[0022] To further illustrate the embodiments, the present application provides the accompanying drawings. These drawings are part of the disclosure of the present application, which are mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the related description of the specification. With reference to these contents, those skilled in the art should be able to understand other possible implementations and the advantages of the present application. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0023] In the description of the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and not to indicate or imply that the device or element referred to must have a particular orientation, constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.
[0024] The present application will be further described in conjunction with the drawings and specific embodiments.
[0025] Referring to Figures 1 to 5 As shown in the drawings, the present application provides a direct-acting high-voltage DC contactor, which comprises a magnetic circuit part, a contact part, a push rod part 50 and an insulating cover (ceramic cover 30 in the present embodiment), specifically, in the present embodiment, the magnetic circuit part adopts the prior art, including coil, moving iron core 11 and yoke iron plate 13, etc., the magnetic field generated by the coil energization drives the moving iron core 11 to act, and the yoke iron plate 13 is used for magnetic conduction; the upper surface of the yoke iron plate 13 is equipped with an insulating seat 40. The opening of the ceramic cover 30 covers the insulating seat 40 and is connected with the yoke iron plate 13, thereby forming a contact cavity 301; the design of the insulating seat 40 is to isolate and insulate the opening position of the ceramic cover 30. The contact part comprises two static contacts 22 fixed on the ceramic cover 30 and a moving contact 21 arranged in the contact cavity 301 and corresponding to the two static contacts 22, the two static contacts 22 are fixed on the ceramic cover 30, the lower end of which extends into the contact cavity 301, and the upper end of which extends out of the ceramic cover 30 for external wiring, and the moving contact 21 is assembled on the push rod part 50; the push rod part 50 is connected with the moving iron core 11; the moving iron core 11 drives the push rod part 50 to rise and drive the moving contact 21 to contact the two static contacts 22 to realize closing, and the moving iron core 11 drives the push rod part 50 to descend and drive the moving contact 21 to separate from the two static contacts 22 to realize opening.
[0026] The push rod part 50 comprises a push rod 51, a fixing base 52 and a positioning sheet 53. The magnetic circuit part is connected with the push rod 51, and the push rod 51 is connected with the moving iron core 11. The end (the upper end in the embodiment) of the push rod 51 extends into the contact cavity 301 and is connected with the moving contact 21 and the positioning sheet 53. The fixing base 52 is made of plastic. The fixing base 52 is integrally formed by injection molding and is fixedly connected with the push rod 51 and the positioning sheet 53. That is, the fixing base 52 is formed by injection molding, and the push rod 51 and the positioning sheet 53 are fixedly covered by the fixing base 52. The insulating base 40 is provided with a guide column 41. The guide column 41 is parallel to the push rod 51 (vertically arranged in the embodiment) and is in guiding cooperation with the positioning sheet 53. In the embodiment, a limiting gap 531 is arranged on the outer side wall of the positioning sheet 53. The guide column 41 is matched in the limiting gap 531. When the push rod part 50 performs the lifting action, the positioning sheet 53 and the guide column 41 are in guiding cooperation, so that the push rod part 50 and the moving contact 21 thereon can be well circumferentially limited, and the moving contact 21 is prevented from being circumferentially deflected to cause dislocation. The circumferential direction is the direction around the push rod 51. Meanwhile, the guide column 41 is arranged on the existing insulating base 40, and the structure is slightly changed and does not occupy the internal space of the contact cavity 301. More space can be reserved for other components such as auxiliary contacts.
[0027] In the embodiment, the positioning sheet 53 adopts the structure of the limiting gap 531 and is not fixedly connected with the guide column 41 and can be freely disassembled. Of course, in other embodiments, the positioning sheet 53 can be provided with a positioning hole to be sleeved with the guide column 41 to realize the guiding cooperation.
[0028] Specifically, the guide column 41 is a cylinder, and the limiting gap 531 is an arc gap matched with the outer circumferential surface of the guide column 41. The arc-shaped contact cooperation has no sharp corner structure and is not easy to wear or be stuck.
[0029] The guide column 41 and the positioning sheet 53 are made of wear-resistant materials such as metal materials or ceramic materials, and are not easy to produce scratches by friction, so as to ensure the stable contact of the contact.
[0030] In this embodiment, the push rod 51 and the positioning piece 53 are integrally connected by an injection-molded fixing seat 52. That is, the push rod 51 and the positioning piece 53 are pre-embedded in the injection mold, and the push rod 51 and the positioning piece 53 are fixed simultaneously when the fixing seat 52 is integrally formed by injection molding. The connection structure is simple, easy to manufacture, and highly efficient. Simultaneously, an elastic element 23 is provided between the fixing seat 52 and the moving contact 21. The elastic element 23 applies a spring force to the moving contact 21 in the direction of the stationary contact 22. Thus, when the moving contact 21 moves upward to contact the stationary contact 22, it provides an elastic buffer, avoiding rigid contact. Of course, in other embodiments, the push rod 51 and the positioning piece 53 can also be fixed by other assembly methods such as welding, snap-fitting, or bonding. However, assembly methods are more cumbersome and less efficient than injection molding.
[0031] Similarly, the insulating base 40 is integrally formed by injection molding and fixedly connected to the guide post 41. That is, the guide post 41 is directly fixed when the insulating base 40 is injection molded, which is simple in connection structure, easy to prepare and highly efficient.
[0032] The materials of the guide post 41 and the positioning piece 53 must also meet the requirements of high temperature resistance, specifically the operating temperature during injection molding, so that they will not deform during injection molding; existing common metal materials (such as iron, copper and metal alloys) and ceramic materials can meet these requirements.
[0033] Furthermore, in this embodiment, the insulating seat 40 has a central clearance opening 401 and a plurality of insulating walls 402 distributed around the clearance opening 401. The push rod portion 50 is movably disposed within the clearance opening 401 to allow for clearance of the push rod portion 50. The guide post 41 is fixed to the innermost insulating wall 402, such as... Figures 2 to 4 As shown, the innermost insulating wall 402 is square, and the upper and lower ends of the guide post 41 are connected by the connecting part 403 extending inward from the insulating wall 402, thereby fixing the guide post 41. Of course, in other embodiments, the guide post 41 can also be assembled onto the insulating base 40 by riveting, gluing, or other methods.
[0034] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.
Claims
1. A direct-acting high-voltage DC contactor, comprising a magnetic circuit section, a contact section, a push rod section, and an insulating cover, wherein an insulating seat is mounted on the yoke plate of the magnetic circuit section, and an opening of the insulating cover covers the insulating seat and is connected to the yoke plate, thereby forming a contact cavity; characterized in that: The push rod portion includes a push rod and a positioning plate. The magnetic circuit portion drives and connects the push rod. The end of the push rod extends into the contact cavity and connects the positioning plate and the moving contact of the contact portion. A guide post is provided on the insulating base. The guide post is parallel to the push rod and forms a guiding engagement with the positioning plate.
2. The direct-acting high-voltage DC contactor according to claim 1, characterized in that: The positioning piece has a limiting notch on its outer side wall, and the guide post fits into the limiting notch.
3. The direct-acting high-voltage DC contactor according to claim 2, characterized in that: The guide post is a cylinder, and the limiting notch is an arc notch that matches the outer circumferential surface of the guide post.
4. The direct-acting high-voltage DC contactor according to claim 1, characterized in that: The push rod part also includes a fixing seat, which is integrally molded by injection molding and fixedly connects the push rod and the positioning plate.
5. The direct-acting high-voltage DC contactor according to claim 4, characterized in that: An elastic element is also provided between the fixed base and the moving contact, and the elastic element applies a spring force to the moving contact in the direction of the stationary contact.
6. The direct-acting high-voltage DC contactor according to claim 1, characterized in that: The insulating base is integrally molded by injection molding and fixedly connected to the guide post.
7. The direct-acting high-voltage DC contactor according to claim 1, characterized in that: The guide post is riveted or glued to the insulating base.
8. The direct-acting high-voltage DC contactor according to claim 1, characterized in that: The insulating seat has a central relief opening and multiple insulating walls distributed around the relief opening. The push rod is movably disposed within the relief opening. The guide post is fixed to the innermost insulating wall.
9. The direct-acting high-voltage DC contactor according to claim 1, characterized in that: The guide post and positioning plate are made of wear-resistant material.
10. The direct-acting high-voltage DC contactor according to claim 9, characterized in that: The guide post is made of metal or ceramic; the positioning plate is made of metal or ceramic.
11. The direct-acting high-voltage DC contactor according to claim 1, characterized in that: The insulating cover is a ceramic cover.