Partially disassembled contactor

Abstract

This utility model discloses a semi-disposable contactor, comprising a contactor body and a semi-shell. The contactor body includes an arc-extinguishing shield, magnetic pole pieces, and a yoke. The arc-extinguishing shield and the yoke are fixed to the upper and lower sides of the magnetic pole pieces, respectively. The semi-shell covers the outside of the arc-extinguishing shield and does not obscure or partially obscure the yoke. The semi-shell is provided with a first latch for engaging with the magnetic pole pieces or the yoke, thereby fixing the semi-shell to the contactor body. This utility model, through a rational design of the structure of the semi-shell and the contactor body, significantly reduces the overall volume compared to traditional high-voltage DC contactors, facilitating the high integration of the BDU. Simultaneously, the first latch on the semi-shell allows it to engage with the magnetic pole pieces or the yoke, fixing the semi-shell to the contactor body and improving installation stability and convenience, reducing complex operations during assembly, and contributing to increased production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of contactor technology, and in particular to a semi-disposable contactor. Background Technology

[0002] Against the backdrop of the rapid development of the new energy electric vehicle industry, the market demand for battery pack circuit breaker units (BDUs) has experienced explosive growth. As a key component of the battery pack, the BDU, in response to the market's urgent need for high integration, low cost, and lightweight design, has placed stringent requirements on its internal sub-components to be small in size and lightweight.

[0003] Traditional DC contactors, as a crucial safety component in BDUs (Block Utility Units), have traditionally used a top-and-bottom housing design. However, this design has significant drawbacks: its large size makes it difficult to meet the current space-constrained requirements of BDUs, thus limiting the integrated development of BDUs to some extent.

[0004] To address the issue of excessive size, while fully unlocked contactors successfully reduced their size, they introduced a series of new problems. Firstly, due to the lack of a housing, they cannot be assembled and secured with external components (such as the BDU housing), which significantly limits the ease and stability of installation in practical applications. Secondly, they cannot install arc-extinguishing magnets, which play a crucial role in suppressing arcs and protecting contacts when the contactor breaks the circuit; the absence of arc-extinguishing magnets affects the contactor's safety performance. Thirdly, the inability to effectively isolate the two stationary contacts may lead to unstable electrical performance and increase the risk of short circuits.

[0005] As industry trends become clearer, integration through a semi-detachable contactor design has become a more ideal choice for BDU (Browser Duct Unit) design. However, semi-detachable contactors also have some problems that need to be solved. The contactor body and upper housing are designed as separate units, requiring secondary fixing (such as adhesive application) during assembly on the BDU production line. This not only increases production steps and reduces production efficiency but also makes effective positioning difficult and prone to housing misalignment.

[0006] In summary, the existing contactor structure is insufficient to meet the ever-increasing performance and production requirements of the new energy electric vehicle industry for BDUs, and a new semi-detachable contactor design is urgently needed to solve these problems. Utility Model Content

[0007] The problem to be solved by this utility model is to provide a semi-detachable contactor to overcome the defects of existing contactors where the main body and semi-shell cannot be effectively fixed, resulting in easy displacement, easy loosening, and low installation efficiency.

[0008] The technical solution adopted by this utility model to solve its technical problem is as follows: a semi-disposable contactor, comprising a contactor body and a semi-shell, wherein the contactor body includes an arc-extinguishing shield, a magnetic pole piece, and a yoke, the arc-extinguishing shield and the yoke are respectively fixed to the upper and lower sides of the magnetic pole piece, the semi-shell is disposed outside the arc-extinguishing shield and does not cover the yoke or does not completely cover the yoke; the semi-shell is provided with a first buckle, the first buckle is used to engage with the magnetic pole piece or the yoke to fix the semi-shell to the contactor body.

[0009] As a further improvement of this utility model, the magnetic pole piece or the yoke is provided with a mating feature adapted to the first buckle, and the first buckle is engaged with the mating feature.

[0010] As a further improvement of this utility model, when the mating feature is provided on the magnetic pole piece, the mating feature is a first boss, and the first buckle engages with the first boss.

[0011] As a further improvement of this utility model, when the matching feature is provided on the yoke, the matching feature is a second boss, and the first buckle engages with the second boss.

[0012] As a further improvement of this utility model, the first buckle includes two spaced cantilever arms and a stop arm fixedly connected between the lower ends of the two cantilever arms. The upper ends of the two cantilever arms are fixedly connected to the side of the half-shell. The mating feature falls into the gap between the two cantilever arms and stops on the stop arm.

[0013] As a further improvement of this utility model, at least one of the mating features and the stop arm is provided with a chamfer.

[0014] As a further improvement of this utility model, at least one first buckle is provided on each of the opposite sides of the semi-shell, and the mating features provided on the magnetic pole piece or the yoke are the same in number as the first buckle and are snapped together one by one.

[0015] Alternatively, there may be multiple first buckles, each of which is distributed at intervals along the circumference of the half-shell. The magnetic pole piece or the yoke may have multiple engaging features that are the same number as the first buckles and engage in a one-to-one correspondence, so as to fix the half-shell from multiple directions.

[0016] As a further improvement of this utility model, the first buckle includes an arm fixedly connected to the upper end of the half shell and a hook extending inward from the lower end of the arm, the hook engaging with the bottom surface of the magnetic pole piece.

[0017] As a further improvement of this utility model, the semi-shell is a hollow cover with a top but no bottom, and the first buckle is integrally disposed on the outer side of the semi-shell and protrudes downward from the bottom of the semi-shell.

[0018] As a further improvement of this utility model, an insulating pad or adhesive is provided between the top of the arc-extinguishing hood and the semi-shell.

[0019] The beneficial effects of this utility model are as follows: This utility model provides a semi-disposable contactor. By rationally designing the structure of the semi-shell and the contactor body, the overall volume is significantly reduced compared to traditional high-voltage DC contactors. This better meets the requirements of BDU for small device volume and space, and helps to achieve high integration of BDU. It also provides more flexible options for the internal space layout of new energy electric vehicle battery packs. At the same time, the semi-shell is provided with a first buckle, which can be snapped onto the magnetic pole piece or yoke to fix the semi-shell to the contactor body. This improves the stability and convenience of installation, reduces complex operations in the assembly process, and helps to improve production efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of Embodiment 1 of the semi-disposable contactor of this utility model;

[0022] Figure 2 This utility model Figure 1 Enlarged view of section A in the middle;

[0023] Figure 3 This is an exploded view of Embodiment 1 of the semi-disposable contactor of this utility model;

[0024] Figure 4 This is a perspective view of the half-shell in Embodiment 1 of the semi-disposable contactor of this utility model;

[0025] Figure 5 This is a perspective view of Embodiment 2 of the semi-disposable contactor of this utility model;

[0026] Figure 6 This is an exploded view of Embodiment 2 of the semi-disposable contactor of this utility model;

[0027] Figure 7 This is a perspective view of Embodiment 3 of the semi-disposable contactor of this utility model;

[0028] Figure 8This is an exploded view of Embodiment 3 of the semi-disposable contactor of this utility model;

[0029] Figure 9 This is a perspective view of Embodiment 4 of the semi-disposable contactor of this utility model;

[0030] Figure 10 This utility model Figure 9 Enlarged view of section B in the middle.

[0031] Referring to the accompanying drawings, the following explanations are provided:

[0032] 1. Contactor body; 11. Arc extinguishing cover; 12. Magnetic pole piece; 121. First boss; 1211. Bud; 1212. Step; 13. Yoke; 131. Second boss; 132. Third boss; 14. Stationary contact; 15. Coil winding; 2. Half-shell; 21. First latch; 211. Cantilever; 212. Stop arm; 213. Arm part; 214. Hook part; 22. Second latch; 23. Partition; 100. Chamfer. Detailed Implementation

[0033] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0034] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0036] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0038] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0039] Example 1

[0040] See Figures 1 to 4 This utility model provides a semi-disengaged contactor, including a contactor body 1 and a semi-shell 2. The contactor body 1 includes an arc-extinguishing cover 11, a magnetic pole piece 12, and a yoke 13. The arc-extinguishing cover 11 and the yoke 13 are respectively fixed to the upper and lower sides of the magnetic pole piece 12. The contact breaking and connecting operations of the contactor body 1 are completed within the arc-extinguishing cover 11, while the magnetic pole piece 12 and the yoke 13 are part of the magnetic circuit system of the contactor body 1.

[0041] As an important improvement of the present invention, the half-shell 2 is provided outside the arc extinguishing cover 11 and does not cover the yoke 13 or does not completely cover the yoke 13. At the same time, the half-shell 2 is provided with a first buckle 21, which is used to snap onto the magnetic pole piece 12 or the yoke 13 to fix the half-shell 2 to the contactor body 1.

[0042] This invention's semi-detachable contactor, through a rational design of the structure of the semi-shell 2 and the contactor body 1, significantly reduces the overall volume compared to traditional high-voltage DC contactors. This better meets the space requirements of BDU (Battery Unit) devices, facilitating high integration of the BDU and providing more flexible options for the internal space layout of new energy electric vehicle battery packs. Simultaneously, the semi-shell 2 is equipped with a first latch 21, which can be engaged with the magnetic pole piece 12 or the yoke 13 to fix the semi-shell 2 to the contactor body 1, improving installation stability and convenience, reducing complex operations during assembly, and contributing to increased production efficiency.

[0043] It should be noted that the "half-shell 2" mentioned in this document does not refer to half of the complete shell of a traditional contactor, but rather its dimensions can be reasonably configured according to actual product specifications and production needs. (See the attached diagram in this manual.) Figure 1As shown, the semi-shell 2 is located above the magnetic pole piece 12, completely covering the arc-extinguishing shield 11 without obscuring the yoke 13. Of course, in some other embodiments of this utility model, the bottom of the semi-shell 2 can be appropriately extended downward to obscure a portion of the yoke 13, so that at least a portion of the yoke 13 is not obscured by the semi-shell 2 and is exposed outward.

[0044] In this utility model, the magnetic pole piece 12 or the yoke 13 is provided with a mating feature adapted to the first buckle 21, and the first buckle 21 is engaged with the mating feature.

[0045] like Figures 1 to 3 As shown, the mating feature in this embodiment is provided on the magnetic pole piece 12. The mating feature is a first boss 121, and the first latch 21 engages with the first boss 121. The half-shell 2 is directly engaged with the first boss 121 on the magnetic pole piece 12 via the first latch 21, thus fixing it to the contactor body 1 and making it a whole. This eliminates the need for secondary fixing on the BDU production line, changing the cumbersome assembly process caused by the previous separate design of the contactor body and shell. This fixing method reduces production steps, shortens the production cycle, and reduces production costs, meeting the needs of large-scale production for improved production efficiency.

[0046] In this embodiment, the arc-extinguishing cover 11 is approximately rectangular; the half-shell 2 is a hollow cover with a top but no bottom, also rectangular in shape. The internal cavity of the half-shell 2 is larger than that of the arc-extinguishing cover 11, leaving gaps between the left and right ends of the arc-extinguishing cover 11 and the half-shell 2. These gaps provide space for the installation of the arc-extinguishing magnet. This invention, through the cooperation of the half-shell 2 and the contactor body 1, allows for the rational arrangement of the arc-extinguishing magnet's installation position. Effective installation of the arc-extinguishing magnet can redirect the generated arc in the opposite direction when the contacts of the contactor body 1 break, achieving rapid arc extinguishing, protecting the contacts, improving the contactor's safety performance, and ensuring stable and reliable operation of the BDU under high-voltage environments.

[0047] In addition, the contactor body 1 also includes two stationary contacts 14, which are fixed side by side at intervals on the top of the arc extinguishing cover 11. The half-shell 2 is provided with two round holes, through which the two stationary contacts 14 protrude upwards respectively.

[0048] It is worth mentioning that the top of the semi-shell 2 is provided with a partition 23, which is located between the two stationary contacts 14. The height of the partition 23 meets the safety requirements and can isolate the two stationary contacts 14 to a certain extent, avoiding short circuits caused by electrical interference or accidental connection between the stationary contacts 14. This improves the electrical performance stability of the contactor and further enhances the reliability of the BDU.

[0049] like Figure 1As shown, the front and rear sides of the semi-shell 2 are the sides containing its long side, and the left and right sides are the sides containing its wide side. Furthermore, both the front and rear sides of the semi-shell 2 are provided with, but not limited to, two second latches 22. These second latches 22 are used for assembly and fixation with external parts such as the BDU housing. This design solves the problem of the semi-shell contactor being unable to be assembled and fixed with external parts, facilitating installation on external structures such as the BDU housing, improving installation stability and convenience, reducing complex operations during assembly, and helping to improve production efficiency.

[0050] In this utility model, the half-shell 2 can be injection molded from insulating plastic, and the first buckle 21 is integrally injection molded. The first buckle 21 is integrally set on the outer side of the half-shell 2 and protrudes downward from the bottom of the half-shell 2.

[0051] Furthermore, each of the front and rear sides of the semi-shell 2 is provided with at least one first buckle 21, and the number of first protrusions 121 on the magnetic pole piece 12 is the same as the number of first buckles 21 and they are engaged one-to-one.

[0052] Preferably, such as Figure 1 As shown, the front and rear sides of the half-shell 2 are each provided with two first buckles 21. At the same time, the front and rear sides of the magnetic pole piece 12 (i.e. the side where its long side is located) are each provided with two first protrusions 121. The four first buckles 21 are engaged with the four first protrusions 121 in a one-to-one correspondence, thereby achieving a more stable and reliable fixation between the half-shell 2 and the contactor body 1.

[0053] See Figure 2 Each of the first latches 21 includes two vertically extending and spaced-apart cantilever arms 211 and a stop arm 212 fixedly connected between the lower ends of the two cantilever arms 211. The upper ends of the two cantilever arms 211 are fixedly connected to the outer side of the half-shell 2. During assembly, the half-shell 2 is placed on the arc-extinguishing cover 11 from top to bottom until the first protrusion 121 falls into the gap between the two cantilever arms 211 and is blocked by the stop arm 212 to prevent it from falling out, thereby completing the assembly and fixing. The assembly operation is convenient and quick, which is conducive to realizing automated assembly and meets the needs of large-scale production for improving production efficiency.

[0054] To ensure that the first boss 121 can smoothly fall into the gap between the two cantilever arms 211 during assembly, at least one of the first boss 121 and the stop arm 212 is provided with a chamfer 100. Preferably, as shown below... Figure 2 and Figure 4 As shown, in this embodiment, both the first boss 121 and the stop arm 212 are provided with chamfers 100 to facilitate the engagement of the first buckle 21 with the first boss 121.

[0055] Furthermore, this invention can also provide an insulating pad between the top of the arc-extinguishing cover 11 and the half-shell 2. During the assembly of the half-shell 2, the insulating pad is compressed elastically; after the half-shell 2 is assembled, the insulating pad releases its elasticity and remains in contact with the half-shell 2, so that there is no room for movement between the half-shell 2 and the contactor body 1, preventing the half-shell 2 from shaking and further increasing the fixing strength.

[0056] Alternatively, adhesive can be applied between the top of the arc-extinguishing cover 11 and the half-shell 2 to further bond the half-shell 2 to the contactor body 1, which can also prevent the half-shell 2 from shaking and further increase the fixing strength.

[0057] In addition, the contactor body 1 also includes an electromagnetic mechanism, a push rod assembly, and a moving contact piece, all of which employ existing conventional technologies.

[0058] The electromagnetic mechanism includes a coil winding 15 located below the magnetic pole piece 12, and a moving iron core and a stationary iron core located inside the coil winding 15. The stationary iron core is fixed to the bottom of the magnetic pole piece 12, and the moving iron core is arranged at intervals below the stationary iron core. A reaction spring is installed between the moving and stationary iron cores. The lower end of the push rod assembly passes through the magnetic pole piece 12 and the stationary iron core in sequence and is fixedly connected to the moving iron core. The moving contact is installed at the upper end of the push rod assembly and is vertically opposite to the two stationary contacts 14.

[0059] When the coil winding 15 is energized, the magnetized moving iron core is attracted upward by the stationary iron core and eventually adheres to the bottom of the stationary iron core. During this process, the moving iron core pushes the moving contact plate upward through the push rod assembly, causing the moving contact plate to make contact with the two stationary contacts 14 and conduct electricity. When the coil winding 15 is de-energized, the magnetic attraction between the moving iron core and the stationary iron core disappears. Under the combined action of the reaction spring and the contact spring, the moving iron core moves downward and, through the push rod assembly, causes the moving contact plate to disconnect from the two stationary contacts 14.

[0060] Example 2

[0061] The difference between this embodiment and Embodiment 1 is that the positions of the first buckle 21 and the first protrusion 121 are different.

[0062] See Figure 5 and Figure 6 Specifically, in this embodiment, the first buckles 21 are distributed on the left and right outer sides of the half-shell 2, and each of the left and right outer sides of the half-shell 2 is provided with, but not limited to, two first buckles 21. Correspondingly, each of the left and right sides of the magnetic pole piece 12 (i.e., the side where its wide edge is located) is provided with two first protrusions 121, and the four first buckles 21 are engaged with the four first protrusions 121 in a one-to-one correspondence, thereby achieving a more stable and reliable fixation between the half-shell 2 and the contactor body 1.

[0063] like Figure 6As shown, the first protrusion 121 is formed by extending horizontally outward from the left and right sides of the magnetic pole piece 12. A protrusion 1211 is provided at the center of the end of the first protrusion 121 furthest from the magnetic pole piece 12, and steps 1212 are formed on both sides of the protrusion 1211. When the first latch 21 engages with the first protrusion 121, the protrusion 1211 falls into the gap between the two cantilever arms 211 of the first latch 21, and is blocked by the stop arm 212 to prevent it from falling out. Simultaneously, the two cantilever arms 211 also abut against the two steps 1212, making the connection between the first latch 21 and the first protrusion 121 more stable and reliable.

[0064] Example 3

[0065] In this embodiment, there are multiple first buckles 21, and each first buckle 21 is distributed at intervals along the circumference of the half-shell 2 (it can be understood that the first buckle 21 in this embodiment integrates the first buckle 21 in embodiment one and the first buckle 21 in embodiment two). The magnetic pole piece 12 is provided with multiple first protrusions 121 that are the same number as the first buckles 21 and are engaged one-to-one, so as to fix the half-shell 2 from multiple directions.

[0066] Example 4

[0067] The difference between this embodiment and Embodiment 1 is that the mating feature is set on the yoke 13.

[0068] See Figure 7 and Figure 8 The mating feature is the second protrusion 131, and the first buckle 21 engages with the second protrusion 131.

[0069] In this utility model, the yoke 13 is U-shaped and has two side plates. Each of the top ends of the two side plates is provided with a third protrusion 132. The magnetic pole piece 12 is provided with notches at the four corners. The four third protrusions 132 fit into the four notches one by one and are fixed by riveting.

[0070] In this embodiment, the second boss 131 is formed by extending horizontally outward from one side of the third boss 132.

[0071] Two first buckles 21 are provided on each of the front and rear sides of the half-shell 2. At the same time, a second boss 131 extends from each of the four third bosses 132. The four first buckles 21 are engaged with the four second bosses 131 in a one-to-one manner, thereby achieving a more stable and reliable fixation between the half-shell 2 and the contactor body 1.

[0072] Example 5

[0073] The difference between this embodiment and Embodiment 1 is that the first protrusion 121 is not required on the magnetic pole piece 12, and the first buckle 21 is directly snapped onto the magnetic pole piece 12.

[0074] See Figure 9 and Figure 10 Specifically, in this embodiment, the first buckle 21 includes an arm 213 and a hook 214. The arm 213 extends vertically, with its upper section integrally connected to the outer side of the semi-shell 2, and its lower section extending vertically downward out of the semi-shell 2. The shape of the arm 213 is not limited; it can be a single vertical plate or, as shown in the image, it can be... Figure 10 As shown, a dividing groove is created in the middle.

[0075] The hook 214 is integrally formed by extending inward from the lower end of the arm 213. The top surface of the hook 214 is flat. The hook 214 is directly engaged with the bottom surface of the magnetic pole piece 12 from one side edge position. This can also fix the half shell 2 to the contactor body 1, improve the stability and convenience of installation, reduce the complex operation in the assembly process, and help improve production efficiency.

[0076] Preferably, two first buckles 21 are provided on each of the front and rear sides of the semi-shell 2. The four first buckles 21 are simultaneously engaged with the bottom surface of the magnetic pole piece 12 from the front and rear sides, making the fixation between the semi-shell 2 and the contactor body 1 more stable and reliable.

[0077] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0078] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A semi-disposable contactor, comprising a contactor body (1) and a semi-shell (2), wherein the contactor body (1) comprises an arc-extinguishing shield (11), a magnetic pole piece (12), and a yoke (13), wherein the arc-extinguishing shield (11) and the yoke (13) are respectively fixed to the upper and lower sides of the magnetic pole piece (12), characterized in that, The semi-shell (2) is placed outside the arc extinguishing cover (11) and does not cover the yoke (13) or does not completely cover the yoke (13). The semi-shell (2) is provided with a first buckle (21), which is used to snap onto the magnetic pole piece (12) or the yoke (13) to fix the semi-shell (2) to the contactor body (1).

2. The semi-decorticator contactor of claim 1, wherein, The magnetic pole piece (12) or the yoke (13) is provided with a mating feature adapted to the first buckle (21), and the first buckle (21) is engaged with the mating feature.

3. The semi-decorticator contactor of claim 2, wherein, When the mating feature is provided on the magnetic pole piece (12), the mating feature is a first boss (121), and the first buckle (21) engages with the first boss (121).

4. The semi-decorticator contactor of claim 2, wherein, When the fitting feature is provided on the yoke (13), the fitting feature is the second boss (131), and the first buckle (21) engages with the second boss (131).

5. The semi-decorticator contactor of claim 3 or 4, wherein, The first buckle (21) includes two spaced cantilever arms (211) and a stop arm (212) fixedly connected between the lower ends of the two cantilever arms (211). The upper ends of the two cantilever arms (211) are fixedly connected to the side of the half-shell (2). The mating feature falls into the gap between the two cantilever arms (211) and stops on the stop arm (212).

6. The half-dehusked contactor of claim 5, wherein, At least one of the mating features and the stop arm (212) is provided with a chamfer (100).

7. The semi-decorticator contactor of claim 2, wherein, The half-shell (2) is provided with at least one first buckle (21) on each of its opposite sides. The number of mating features provided on the magnetic pole piece (12) or the yoke (13) is the same as that of the first buckle (21) and they are connected in a one-to-one correspondence. Alternatively, there may be multiple first buckles (21), each of which is distributed circumferentially along the half-shell (2). The magnetic pole piece (12) or the yoke (13) is provided with multiple engaging features that are the same number as the first buckles (21) and are engaged one-to-one, so as to fix the half-shell (2) from multiple directions.

8. The semi-decorticator contactor of claim 1, wherein, The first buckle (21) includes an arm (213) whose upper end is fixedly connected to the half shell (2) and a hook (214) formed by extending inward from the lower end of the arm (213), the hook (214) being engaged with the bottom surface of the magnetic pole piece (12).

9. The semi-decorticator contactor of claim 1, wherein, The semi-shell (2) is a hollow cover with a top but no bottom. The first buckle (21) is integrally disposed on the outer side of the semi-shell (2) and protrudes downward from the bottom of the semi-shell (2).

10. The semi-decorticator contactor of claim 1, wherein, An insulating pad or adhesive is provided between the top of the arc-extinguishing cover (11) and the half-shell (2).

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