Contactor with good sealing performance

Abstract

The utility model discloses a contactor with good sealing performance, which comprises an upper shell, a frame sheet and a lower shell, the upper shell, the frame sheet and the lower shell are sequentially and hermetically assembled from top to bottom, the upper shell and the frame sheet are hermetically connected through plastic packaging glue, and the frame sheet and the lower shell are hermetically sewed and welded. According to the sewing welding mode, on one hand, the requirement for welding power is low, welding stress is relatively small, product deformation is small, influence on product mechanical parameters is small, on the other hand, the requirement for parts is not high, part machining difficulty is small, welding strength and product sealing reliability are improved, and the requirement for the planeness of the parts is not high; and a sealed environment is formed in the contactor, so that the air tightness is good, the oxidation of electronic components and parts in the contactor can be better protected, the stability of a contact resistor and the connection reliability of a product are kept, and the requirements of customers on protection conditions of a use environment of the contactor are met.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a contactor with good sealing performance. Background Art

[0002] The contact part of the existing bridge-type three-phase contactor product is not designed with a sealed structure. The frame and the lower shell of the contactor are connected by penetration welding, which requires pressure from the upper and lower sides. The laser penetrates the welding plates at the corresponding positions of the upper and lower positions from the thickness direction and melts them together. This welding method requires a large welding power and a large penetration welding stress, which leads to a large deformation of the product, easily causing changes in the mechanical parameters of the product and reducing product performance. In addition, the flatness requirements of the parts are relatively high. Otherwise, if there is adverse vibration after welding, the weld is prone to leakage, affecting the airtightness, and failing to meet the customer's requirements for the protective conditions of the contactor use environment. Utility Model Content

[0003] The utility model aims to provide a contactor with good sealing performance to solve the above-mentioned technical problems.

[0004] To achieve the above purpose, the technical solution of the utility model is: a contactor with good sealing performance, including an upper shell, a frame and a lower shell that are sealed and assembled in sequence, the upper shell and the frame are sealed and connected by plastic sealing glue, and the frame and the lower shell are sealed and sewn and welded.

[0005] Preferably, the frame piece is a planar frame piece, the lower shell comprises a lower shell surrounding wall and a welding portion located at the top end of the lower shell surrounding wall and extending horizontally outward, and the welding portion between the planar frame piece and the lower shell is sealed and seamed and welded up and down.

[0006] Preferably, the peripheral edge of the welding portion extends upward to form a blocking portion, and the circumferential outer side wall of the frame sheet and the circumferential inner side wall of the blocking portion are sealed, sewn and welded.

[0007] Preferably, the upper shell includes an upper shell surrounding wall and a chamfered portion located at the bottom end of the upper shell surrounding wall and extending obliquely outward, the chamfered portion is arranged against the upper side of the frame piece, the blocking portion protrudes out of the frame piece, and a groove is formed between the chamfered portion, the frame piece and the blocking portion, and a sealing connection between the upper shell, the frame piece and the lower shell is achieved by injecting plastic sealant at the groove to form a protective shell.

[0008] Preferably, the outer side surface of the chamfered portion is an inclined surface, and the inclined direction thereof is gradually inclined inward from top to bottom.

[0009] Preferably, it also includes a ceramic shell and a kovable plate arranged inside the upper shell, a clearance opening is opened inside the frame, the kovable plate is correspondingly arranged on the upper side of the outer periphery of the clearance opening, and the top end of the kovable plate is welded and sealed with the bottom end of the ceramic shell.

[0010] Preferably, the kovable plate is spaced apart from the inner side wall of the upper housing.

[0011] Preferably, the frame sheet is integrally formed with the kovable board to form an integral kovable frame sheet.

[0012] Preferably, it also includes a magnetic circuit component and a contact component that cooperate with each other, the magnetic circuit component is located in the lower shell, and the contact component is located in the upper shell.

[0013] The utility model has the following beneficial effects:

[0014] The utility model comprises an upper shell, a frame sheet and a lower shell which are sequentially sealed and assembled, the upper shell and the frame sheet are sealed and connected by plastic sealing glue, the frame sheet and the lower shell are sealed and sutured and welded, and the existing penetration welding method is replaced by suture welding method, so as to have the following advantages: on the one hand, the welding power requirement is low, the welding stress is relatively small, so that the deformation of the product is small, and the influence on the mechanical parameters of the product is small; on the other hand, the requirements for parts are not high, the difficulty of parts processing is small, the welding strength and the sealing reliability of the product are improved, and the product performance is guaranteed at the same time, and the requirements for the flatness of the parts are not high, and it is not easy to leak after welding, a sealed environment is formed inside the contactor, the airtightness is good, the inside of the contactor maintains a clean environment, and the external environment is prevented from polluting the contactor, and the oxidation of electronic components and parts inside the contactor can be better protected, the contact resistance stability and the product connection reliability can be maintained, and the customer's demand for protective conditions of the contactor use environment can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereogram of an embodiment of the utility model;

[0016] Figure 2 It is a top view of an embodiment of the utility model;

[0017] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0018] Figure 4 It is a three-dimensional diagram of an integrated fellable frame piece of an embodiment of the utility model;

[0019] Figure 5 It is a top view of the integrated fellable frame piece of the embodiment of the utility model.

[0020] The accompanying drawings are marked with: 1 upper shell, 11 upper shell wall, 12 chamfered portion, 2 lower shell, 21 lower shell wall, 22 welding portion, 23 blocking portion, 3 frame piece, 4 sink groove, 5 ceramic shell, 6 kovable plate, 7 magnetic circuit assembly, 8 contact assembly. DETAILED DESCRIPTION

[0021] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] See also Figure 1-5 As shown, as an embodiment of the utility model, a contactor with good sealing performance is provided, including an upper shell 1, a frame piece 3 and a lower shell 2 which are sealed and assembled in sequence from top to bottom, the upper shell 1 and the frame piece 3 are sealed and connected by plastic sealing glue, and the frame piece 3 and the lower shell 2 are sealed and sutured and welded. The utility model changes the existing penetration welding method into a suture welding method, and welds along the gap between the frame piece 3 and the lower shell 2. The advantages of the suture welding method compared with the penetration welding method are: on the one hand, the welding power requirement is low, the welding stress is relatively small, so that the deformation of the product is small, and the influence on the mechanical parameters of the product is small; on the other hand, the requirements for parts are not high, the difficulty of parts processing is small, the welding strength and the sealing reliability of the product are improved, and the product performance is guaranteed at the same time, and the requirements for the flatness of the parts are not high, and it is not easy to leak after welding, and a sealed environment is formed inside the contactor with good airtightness, and the contactor maintains a clean environment inside to prevent the external environment from polluting the contactor, which can better protect the oxidation of electronic components and parts inside the contactor, maintain the stability of contact resistance and the reliability of product connection, and meet the customer's demand for protective conditions of the contactor use environment.

[0023] In this embodiment, the frame piece 3 is a planar frame piece, and the lower shell 2 includes a lower shell surrounding wall 21 and a welding portion 22 located at the top of the lower shell surrounding wall 21 and extending horizontally outward. The planar frame piece and the welding portion 22 of the lower shell 2 are sealed and seamed and welded up and down. On the one hand, it can increase the welding area between the frame piece 3 and the lower shell 2, and on the other hand, the two are face to face and form a uniform gap, thereby ensuring the reliability and sealing of the welding.

[0024] In this embodiment, the outer edge of the welding portion 22 extends upward to form a blocking portion 23, and the circumferential outer wall of the frame piece 3 and the circumferential inner wall of the blocking portion 23 are sealed, stitched and welded, thereby further increasing the welding area between the frame piece 3 and the lower shell 2, and increasing the welding surface in the inner and outer directions, further improving the sealing, and the assembly is also more stable, thereby enhancing the overall protection effect of the contactor.

[0025] In this embodiment, the upper shell 1 includes an upper shell surrounding wall 11 and a chamfered portion 12 located at the bottom end of the upper shell surrounding wall 11 and extending obliquely outward, the chamfered portion 12 is arranged against the upper side of the frame piece 3, and the blocking portion 23 protrudes out of the frame piece 3. A sink groove 4 is formed between the chamfered portion 12, the frame piece 3 and the blocking portion 23. The upper shell 1, the frame piece 3 and the lower shell 2 are sealed and connected to form a protective shell by injection molding at the sink groove 4, which is used to protect the external environment of the frame piece 3, prevent the external environment from polluting the contactor, protect the internal electronic components and parts of the contactor from oxidation, maintain the stability of the contact resistance and the reliability of the product connection, thereby extending the service life of the contactor.

[0026] In this embodiment, the outer side surface of the chamfered portion 12 is an inclined surface, and its inclination direction is from top to bottom and gradually inclines inward, thereby increasing the volume of the sink 4, injecting more plastic sealing glue, and also increasing the contact area between the plastic sealing glue and the chamfered portion 12, thereby increasing the adhesion, increasing the firmness and sealing of the product assembly, and ensuring the working stability and reliability of the contactor in a more severe environment.

[0027] In this embodiment, a ceramic shell 5 and a kovable plate 6 are also included, which are arranged inside the upper shell 1. The upper shell 1 and the ceramic shell 5 form an insulating shell. A clearance opening is opened inside the frame 3. The kovable plate 6 is correspondingly arranged on the upper side of the outer periphery of the clearance opening. The top end of the kovable plate 6 is welded and sealed to the bottom end of the ceramic shell 5, thereby improving the assembly stability between the components and making the overall structure of the contactor more solid and stable.

[0028] To sum up, the structural setting of the welding part 22 and the blocking part 23 enables the top end of the lower shell 2 to form a flange structure with an opening facing inward and upward. This setting enables the joint between the frame piece 3 and the flange structure of the lower shell 2 to be better welded, thereby reducing product deformation, improving welding strength and product sealing. On the other hand, the glue dispensing space of the sink 4 is increased, so that more plastic sealing glue can be accumulated in the sink 4, so that the plastic sealing glue forms a whole with the insulating shell after solidification, thereby protecting the external environment of the frame piece 3 assembly.

[0029] In this embodiment, the kovable plate 6 is spaced apart from the inner wall of the upper shell 1 , thereby reserving a certain space distance to facilitate welding and sealing operations between the kovable plate 6 and the ceramic shell 5 .

[0030] In this embodiment, the frame piece 3 and the kovable plate 6 are integrally formed to form an integrated kovable frame piece, thereby avoiding welding between the frame piece 3 and the kovable plate 6, reducing welding points, and ensuring that the overall structure of the contactor is more solid and stable.

[0031] In this embodiment, it also includes a magnetic circuit component 7 and a contact component 8 that cooperate with each other. The magnetic circuit component 7 is located in the lower shell 2, and the contact component 8 is located in the insulating shell to ensure the arc extinguishing insulation effect.

[0032] Although the present invention has been specifically demonstrated and described in conjunction with a preferred embodiment, those skilled in the art should understand that various changes made to the present invention in form and detail, without departing from the spirit and scope of the present invention as defined in the appended claims, shall fall within the scope of protection of the present invention.

Claims

1. A contactor with good sealing performance, characterized in that: It comprises an upper shell, a frame and a lower shell which are sealed and assembled in sequence from top to bottom. The upper shell and the frame are sealed and connected by plastic sealing glue, and the frame and the lower shell are sealed, sewn and welded. The frame is a plane frame, and the lower shell comprises a lower shell surrounding wall and a welding part which is located at the top end of the lower shell surrounding wall and extends horizontally outward. The welding part between the plane frame and the lower shell is sealed, sewn and welded from top to bottom.

2. The contactor with good sealing performance according to claim 1, characterized in that: The peripheral edge of the welding part extends upward to form a blocking part, and the circumferential outer side wall of the frame piece and the circumferential inner side wall of the blocking part are sealed, sewed and welded.

3. The contactor with good sealing performance according to claim 2, characterized in that: The upper shell includes an upper shell surrounding wall and a chamfered portion located at the bottom end of the upper shell surrounding wall and extending obliquely outward, the chamfered portion is arranged against the upper side of the frame piece, the blocking portion protrudes out of the frame piece, and a groove is formed between the chamfered portion, the frame piece and the blocking portion. The upper shell, the frame piece and the lower shell are sealed and connected to form a protective shell by injecting plastic sealant at the groove.

4. The contactor with good sealing performance according to claim 3, characterized in that: The outer side surface of the chamfered portion is an inclined surface, and the inclined direction thereof is gradually inclined toward the inner side from top to bottom.

5. The contactor with good sealing performance according to claim 1, characterized in that: It also includes a ceramic shell and a kovable plate arranged inside the upper shell. A clearance opening is opened inside the frame. The kovable plate is correspondingly arranged on the upper side of the outer periphery of the clearance opening, and the top end of the kovable plate is welded and sealed with the bottom end of the ceramic shell.

6. The contactor with good sealing performance according to claim 5, characterized in that: The kovable plate is spaced apart from the inner side wall of the upper shell.

7. The contactor with good sealing performance according to claim 5, characterized in that: The frame piece is integrally formed with the fellable board to form an integral fellable frame piece.

8. The contactor with good sealing performance according to any one of claims 1 to 7, characterized in that: It also includes a magnetic circuit component and a contact component that cooperate with each other. The magnetic circuit component is located in the lower shell, and the contact component is located in the upper shell.

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