Contactor shell structure and high-voltage direct-current contactor

Abstract

The utility model discloses a contactor shell structure and a high-voltage direct current contactor, and relates to the technical field of electric control devices, the contactor shell structure comprises a shell body and a static contact, the shell body is provided with an accommodating cavity with two mounting holes, the side wall of each mounting hole is provided with a glue injection groove, the glue injection grooves are communicated with the accommodating cavity, the static contact is arranged in the accommodating cavity, and the static contact is arranged in the accommodating cavity. A part of structure of the static contact is exposed out of the mounting hole; according to the technical scheme provided by the utility model, the working procedure of firstly dispensing glue and then assembling the shell is changed, the shell body part is firstly assembled, then glue is injected into the gap between the static contact and the shell body through the glue injection groove, and the insulation glue is fully filled into the gap between the static contact and the shell body under the action of gravity, so that the glue sealing reliability is improved, and the service life of the shell is prolonged. And the problem of incomplete glue coverage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control devices, in particular to a contactor housing structure and a high-voltage direct current contactor. Background Art

[0002] Contactors are divided into AC contactors and DC contactors, which are used in power, power distribution and power consumption. In a broad sense, contactors refer to electrical appliances in industrial electricity that use current flowing through a coil to generate a magnetic field to close the contacts in order to control the load. DC contactors can frequently connect and disconnect the DC main circuit, have large control capacity, and can be operated from a distance, and are widely used in automatic control circuits.

[0003] At present, the high-voltage DC contactor structure on the market includes a shell, two static contacts, a moving contact piece and a driving mechanism installed in a sealed shell cavity. The moving contact piece and the two static contacts are arranged vertically opposite to each other. The driving mechanism mainly includes a driving coil, a moving iron core, a push rod and a reset spring. When the driving coil is energized, the magnetic force generated by it causes the push rod to move vertically upward, and drives the moving contact piece to connect with the two static contacts respectively, and the DC contactor is in a closed working state; when the driving coil is de-energized, the push rod moves vertically downward and resets under the action of the reset spring, and drives the moving contact piece to disconnect from the two static contacts respectively, and the DC contactor is in a disconnected working state.

[0004] As the market's requirements for contactor products are getting higher and higher, the development of contactors has been moving towards miniaturization and safety. For some contactors with better safety, auxiliary contacts are often configured to prevent the adhesion of the moving contact piece to the static contact. Due to the limited space inside the shell, the creepage distance from the static contact to the auxiliary contact is often difficult to meet the safety requirements, which requires the auxiliary contact and the static contact to be isolated by glue filling. Existing products often use glue dispensing before assembling the shell part, which results in poor sealing of the gap between the shell and the static contact, which may not be fully covered. Utility Model Content

[0005] The main purpose of the utility model is to provide a contactor housing structure and a high-voltage DC contactor, aiming to provide a contactor housing structure capable of assembling the housing first and then filling the housing with glue, thereby solving the problem of incomplete sealing.

[0006] In order to achieve the above-mentioned purpose, the contactor housing structure proposed by the utility model includes:

[0007] A shell body, wherein the shell body is provided with a receiving cavity having two mounting holes, a side wall of each mounting hole is provided with a glue injection groove, and the glue injection groove is connected to the receiving cavity; and

[0008] A stationary contact, wherein the stationary contact is arranged in the accommodating cavity, and a part of the structure of the stationary contact is exposed in the mounting hole.

[0009] In one embodiment, an outer side wall of the shell is provided with an insulating partition, and the insulating partition is provided between the two mounting holes and perpendicular to a line connecting the two mounting holes.

[0010] In one embodiment, the glue injection groove is formed with an arc surface, and the arc surface is connected to the side wall of the mounting hole.

[0011] In one embodiment, the glue injection groove is provided with two guide walls, and the two guide walls are arranged at an angle.

[0012] In one embodiment, the inner side wall of the mounting hole gradually shrinks from an end away from the accommodating cavity to an end close to the accommodating cavity.

[0013] In one embodiment, the side wall of each mounting hole is provided with at least two glue injection grooves, and the glue injection grooves are arranged around the mounting hole.

[0014] In one embodiment, the shell body includes an upper shell and a lower shell, the upper shell is snap-connected and fixed to the lower shell, and the upper shell is provided with two mounting holes.

[0015] In one embodiment, the two mounting holes are symmetrically arranged on two sides of the insulating partition.

[0016] In one embodiment, the shell body is made of ceramic or plastic.

[0017] The utility model also provides a high-voltage DC contactor, including a contactor housing structure, wherein the contactor housing structure includes:

[0018] A shell body, wherein the shell body is provided with a receiving cavity having two mounting holes, a side wall of each mounting hole is provided with a glue injection groove, and the glue injection groove is connected to the receiving cavity; and

[0019] A stationary contact, wherein the stationary contact is arranged in the accommodating cavity, and a part of the structure of the stationary contact is exposed in the mounting hole.

[0020] In the technical solution of the utility model, a contactor shell structure and a high-voltage DC contactor are proposed, wherein the contactor shell structure includes a shell body and a static contact, the shell body is provided with a receiving cavity having two mounting holes, the side wall of each mounting hole is provided with a glue injection groove, the glue injection groove is connected to the receiving cavity, the static contact is arranged in the receiving cavity and exposed at the mounting hole, so that in the assembly process, the shell body part is first assembled, and then glue is injected into the gap between the static contact and the shell body through the glue injection groove, and the insulating glue is fully filled into the gap between the static contact and the shell body under the action of gravity, thereby improving the reliability of the glue sealing and avoiding the problem of incomplete glue coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 Schematic diagram of the structure of an embodiment of the contactor housing structure provided by the present invention;

[0023] Figure 2 For Figure 1 Schematic diagram of the structure of the upper housing in the above;

[0024] Figure 3 Schematic diagram of the structure of the first embodiment of the contactor housing structure provided by the present invention;

[0025] Figure 4 Schematic diagram of the structure of the second embodiment of the contactor housing structure provided by the present invention.

[0026] Explanation of the reference numerals in the drawings:

[0027] 1000, contactor housing structure; 1, housing body; 11, upper housing; 111, mounting hole; 12, lower housing; 13, base; 2, static contact; 3, glue injection groove; 31, diversion wall; 4, insulating partition.

[0028] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] The utility model proposes a contactor housing structure, aiming to provide a contactor housing structure capable of assembling the housing first and then filling the housing with glue, thereby solving the problem of incomplete sealing. Figures 1 to 4 The present invention is a schematic structural diagram of a contactor housing structure according to an embodiment of the present invention.

[0033] Please refer to Figures 1 to 4 The utility model proposes a contactor housing structure 1000, including a housing body 1 and a static contact 2. The housing body 1 is provided with a housing cavity having two mounting holes 111. The side wall of each mounting hole 111 is provided with a glue injection groove 3, and the glue injection groove 3 is connected to the housing cavity. The static contact 2 is arranged in the housing cavity, and part of the structure of the static contact 2 is exposed in the mounting hole 111.

[0034] In the technical solution of the utility model, a contactor housing structure 1000 and a high-voltage DC contactor are proposed, wherein the contactor housing structure 1000 includes a shell body 1 and a static contact 2, the shell body 1 is provided with a receiving cavity having two mounting holes 111, and the side walls of each of the mounting holes 111 are provided with a glue injection groove 3, the glue injection groove 3 is connected to the receiving cavity, and the static contact 2 is arranged in the receiving cavity and exposed at the mounting hole 111. In this way, in the assembly process, the shell body 1 is partially assembled first, and then glue is injected into the gap between the static contact 2 and the shell body 1 through the glue injection groove 3. The insulating glue is fully filled into the gap between the static contact 2 and the shell body 1 under the action of gravity, thereby improving the reliability of the glue sealing and avoiding the problem of incomplete glue coverage.

[0035] In view of this, this solution changes the assembly process of "applying glue first and then assembling the housing" in the related art, and adopts the process method of "assembling the housing body 1 first and then injecting glue". Specifically, the components inside the contactor are installed in the accommodating cavity, the static contact 2 is installed, the upper housing 11 of the housing body 1 is installed on the lower housing 12, and the two static contacts 2 penetrate out through the two mounting holes 111 and are exposed. Then, the glue injection equipment uses the glue injection nozzle to abut against the side wall of the glue injection groove 3 to inject glue, so that the glue slowly flows into the gap between the static contact 2 and the housing body 1 under the action of gravity. In this way, it is possible to avoid the incomplete sealing caused by the inability to observe the bonding situation of the glue inside the housing during the process of applying glue first and then assembling the housing. Thus, the electrical safety performance of the high-voltage DC contactor is greatly improved, and the reliability is optimized to make the product manufacturing compliant.

[0036] To ensure the insulation performance between the two static contacts 2, an insulating partition 4 is provided on the outer side wall of the housing. Specifically, please further refer to Figure 1 , the insulating partition 4 is arranged between the two mounting holes 111 and perpendicular to the connection line of the two mounting holes 111. The insulating partition 4 plays a key insulating role in the contactor housing structure 1000. It can effectively isolate different circuit parts, prevent current leakage or short circuit, and thus ensure the safe operation of the electrical system. In terms of the installation method, the insulating partition 4 is usually located between the two mounting holes 111. Such a layout helps to optimize the space utilization and simplify the assembly process at the same time. The insulating partition 4 is integrally formed with the housing to ensure good insulation effect under various working conditions. This design not only improves the reliability of the contactor, but also facilitates maintenance and upgrade.

[0037] In an embodiment of the present invention, the glue injection groove 3 is set as a semi-circular arc groove. Specifically, please further refer to Figure 2 , the design of the arc surface helps to reduce stress concentration, especially near the side wall of the mounting hole 111, which can reduce the risk of cracks caused by mechanical shock or temperature change. In addition, the smooth shape of the semi-circular arc groove is also convenient for the flow and filling of the glue, ensuring the uniformity and integrity of the glue injection process, which is crucial for improving the sealing and waterproof performance of the product. Such a setting not only enhances the structural strength of the contactor housing, but also improves its reliability and durability in various environments.

[0038] In the second embodiment of the present invention, the glue injection groove 3 is provided with two diversion walls 31, and both diversion walls are straight surfaces. Specifically, please further refer to Figure 3, the two diversion walls 31 are arranged at an angle, thus optimizing the flow path of the glue and ensuring the uniformity and efficiency of the glue injection process. The straight diversion wall 31 helps to reduce the resistance of material flow, making the glue injection smoother. At the same time, the angle setting can effectively guide the glue to fill every corner of the groove, avoiding material accumulation or omission. This structure also helps to improve the accuracy of glue injection, ensuring that the glue can evenly cover and isolate the main contact and the auxiliary contact after curing, thereby enhancing the insulation performance and overall electrical safety of the product.

[0039] In the third embodiment of the present invention based on the above two embodiments proposed, the number of glue injection grooves 3 is increased along the circumferential direction of the mounting hole 111. The number of glue injection grooves 3 in this solution is not limited, and it can be two or more than two. In this embodiment, each mounting hole 111 is configured with two glue injection grooves 3, and the two glue injection grooves 3 are symmetrically arranged. Specifically, please refer further to Figure 4 , multiple glue injection grooves 3 can more effectively fill the space around the mounting hole 111, ensuring uniform distribution of the glue, thereby reducing the formation of air bubbles and voids and improving the sealing effect. The symmetrically arranged glue injection grooves 3 help to balance the flow and curing of the glue, ensuring the stability and uniformity of the housing structure. In addition, increasing the number of glue injection grooves 3 can also improve the adaptability of the product, enabling it to cope with different installation environments and requirements, and at the same time increasing the flexibility in the production process, allowing the number and layout of the glue injection grooves 3 to be adjusted according to needs to meet specific design and performance goals.

[0040] To facilitate the installation of internal components of the contactor, the housing body 1 includes an upper housing 11 and a lower housing 12. It should be noted that it can be fixed by snap connection or screw connection. During the installation of the contactor, the components are placed in the accommodation cavity of the lower housing 12, and then the upper housing 11 is installed. When replacing and repairing the internal components, the above operations can also be completed by disassembling the upper housing 11. The lower housing 12 is provided with a base 13, and it can be installed on other devices through the mounting holes 111 on the base 13. Further, the housing body 1 can be made of ceramic material or plastic material, and the present invention does not limit this. In an embodiment of the present invention, the housing body 1 is selected to be made of ceramic material. Ceramic has extremely high insulation performance, can effectively prevent current leakage, and improve the safety of the contactor; secondly, ceramic has excellent heat resistance and chemical corrosion resistance, can remain stable under extreme temperatures and harsh environments, and extend the service life of the contactor; in addition, the ceramic material has high hardness and strong wear resistance, which helps to protect the internal components of the contactor from physical damage.

[0041] The present utility model also provides a high-voltage DC contactor, which includes a contactor housing structure 1000. The specific structure of the contactor housing structure 1000 refers to the above-mentioned embodiments. Since this high-voltage DC contactor adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated one by one here.

[0042] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A contactor housing structure, characterized in that: include: A shell body, wherein the shell body is provided with a receiving cavity having two mounting holes, and a side wall of each mounting hole is provided with a glue injection groove, and the glue injection groove is connected to the receiving cavity; and A stationary contact, wherein the stationary contact is arranged in the accommodating cavity, and a part of the structure of the stationary contact is exposed in the mounting hole.

2. The contactor housing structure according to claim 1, characterized in that: An insulating partition is provided on the outer side wall of the shell, and the insulating partition is arranged between the two mounting holes and perpendicular to the connecting line of the two mounting holes.

3. The contactor housing structure according to claim 2, characterized in that: The glue injection groove is formed with an arc surface, and the arc surface is connected to the side wall of the mounting hole.

4. The contactor housing structure according to claim 2, characterized in that: The glue injection groove is provided with two guide walls, and the two guide walls are arranged at an angle.

5. The contactor housing structure according to claim 2, characterized in that: The inner side wall of the mounting hole gradually shrinks from an end away from the accommodating cavity to an end close to the accommodating cavity.

6. The contactor housing structure according to any one of claims 1 to 5, characterized in that: The side wall of each mounting hole is provided with at least two glue injection grooves, and the glue injection grooves are arranged around the mounting hole.

7. The contactor housing structure according to any one of claims 1 to 5, characterized in that: The shell body comprises an upper shell and a lower shell, the upper shell is clamped and fixed to the lower shell, and the upper shell is provided with two mounting holes.

8. The contactor housing structure according to claim 2, characterized in that: The two mounting holes are symmetrically arranged on two sides of the insulating partition.

9. The contactor housing structure according to any one of claims 1 to 5, characterized in that: The shell body is made of ceramic or plastic.

10. A high voltage DC contactor, characterized in that: The invention comprises a contactor housing structure as claimed in any one of claims 1 to 9.

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