Assembly process of explosion-proof switch module and unit housing

Abstract

The present invention discloses an assembly process for an explosion-proof switch module and a unit housing, and belongs to the field of switch technology. The present invention discloses an assembly process for an explosion-proof switch module and a unit housing, comprising a switch unit and an operating shaft, wherein there are multiple switch units. In order to solve the problem that the guided heat dissipation between the internal parts of the switch is poor and the overly dense arrangement of the parts will cause the working temperature in the space to be too high, the external heat dissipation kit is separately installed at both ends of the separation and combination chamber, covering the upper part of the two ends of the separation and combination contact pieces. The external heat dissipation kit is not in direct contact with the separation and combination contact pieces. The heat generated during the operation of the separation and combination contact pieces when they are energized will diffuse to the surroundings, while the external heat dissipation kit can absorb the heat emitted by the separation and combination contact pieces, and conduct the heat to the external housing structure through the external conduction structure, thereby helping the internal parts of the switch to dissipate heat quickly and avoid over-combustion caused by excessive working temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of switches, and in particular to an assembly process of an explosion-proof switch module and a unit housing. Background Art

[0002] The switch module is the main component of the switch. In order to improve the safety performance of the switch, the switch module often needs to adopt an explosion-proof switch module with explosion-proof function.

[0003] The explosion-proof switch module includes multiple switch units stacked in sequence and an operating shaft that passes through each switch unit and controls the on / off of the switch unit by rotation. The switch unit includes a unit housing, and electrical connection plates for electrical connection are respectively provided on both sides of the unit housing. The electrical connection plates are fixed during the injection molding process of the unit housing. The above structure has the following disadvantages:

[0004] 1) During the injection molding process, an insulating layer is easily formed on the surface of the electrical connection, which is difficult to handle and affects the performance of the electrical connection;

[0005] 2) During the injection molding process, if a defective unit housing is produced, the unit housing and the electrical connector must be discarded together, increasing production costs.

[0006] 3) There are drawbacks in the guided heat dissipation between the parts inside the switch. Too dense an arrangement of parts will cause the operating temperature in the space to be too high. Summary of the Invention

[0007] The purpose of the present invention is to provide an assembly process for an explosion-proof switch module and a unit housing. The heat generated during the operation of the opening and closing contacts when they are energized will diffuse to the surroundings, and the external heat dissipation kit can absorb the heat emitted by the opening and closing contacts and conduct the heat to the external housing structure through the external conduction structure, thereby helping the internal parts of the switch to dissipate heat quickly, avoiding overheating caused by excessive operating temperature, and solving the problems in the prior art.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an explosion-proof switch module, comprising a switch unit and an operating shaft, wherein there are multiple switch units, and the switch units are stacked in sequence, the switch unit comprises a unit shell, and there are two unit shells, the unit shells are tightly connected, and a separation and combination chamber is provided inside the unit shell, a separation and combination contact is provided inside the separation and combination chamber, and external heat dissipation kits are provided at both ends of the separation and combination chamber, a metal retaining plate is provided below the external heat dissipation kit, and the metal retaining plate is connected to the unit shell by screws, and an engaging shaft rod is provided above both ends of the metal retaining plate, and the engaging shaft rod is connected to the metal retaining plate by a card slot.

[0009] Preferably, the external heat dissipation kit includes heat dissipation fins, top support gaskets and bottom support gaskets, and there are multiple heat dissipation fins. The top support gaskets are arranged above the heat dissipation fins, and the bottom support gaskets are arranged below the heat dissipation fins. The outer surfaces of the top support gaskets and the bottom support gaskets are provided with assembly slots, and the heat dissipation fins are connected to the assembly slots through bite blocks.

[0010] Preferably, both ends of the unit shell are provided with electrical connecting pieces, and the electrical connecting pieces include an external connecting end located outside the unit shell and an internal connecting end located inside the unit shell. The side wall of the unit shell is provided with a first mounting groove connecting the inside and outside of the unit shell, and the electrical connecting piece is provided with a mating portion adapted to the shape of the first mounting groove between the external connecting end and the internal connecting end.

[0011] Preferably, the first mounting groove is provided with a pressure plate for pressing the mating part against the first mounting groove, and the pressure plate, the mating part and the bottom of the first mounting groove are coaxially provided with fixing holes for the threaded part to pass through and fix, and the position near the first mounting groove in the unit shell is filled with potting glue, and limit blocks are respectively provided on both sides of the pressure plate and are limited to the inner side of the side wall of the unit shell.

[0012] Preferably, the electrical connection piece is provided with a bent portion bent toward the bottom of the unit housing between the matching portion and the inner connection end.

[0013] Preferably, a convex strip is provided in the unit shell, the convex strip is provided with a plug-in notch, the electrical connecting piece is provided with a plug-in portion that is plugged into the plug-in notch between the matching portion and the inner connecting end, and the switch unit is provided with an auxiliary signal module at one end.

[0014] Preferably, the operating shaft is provided with a control cam corresponding to the auxiliary signal module and each switch unit, which rotates synchronously with the operating shaft. The periphery of the control cam is provided with a control protrusion for disconnecting the switch unit or the auxiliary signal module. The control protrusion corresponding to the switch unit and the control protrusion corresponding to the auxiliary signal module are staggered relative to the circumference of the control shaft.

[0015] Preferably, a linkage pin is provided in the middle of the splitting and combining contact piece, which extends to the rotating cavity and moves radially along the rotating cavity in the unit shell. When the linkage pin is squeezed by the control protrusion, the splitting and combining contact piece is separated from the inner connecting end. A spring is compressed between the splitting and combining contact piece and the unit shell and is located on the other side of the splitting and combining contact piece opposite to the inner connecting end.

[0016] Preferably, copper body contacts are provided at both ends of the split-and-close contact piece, and the copper body contacts are fitted and connected to the split-and-close contact piece, and the split-and-close contact piece is fitted and connected to the inner connection end.

[0017] An assembly process for a unit housing of an explosion-proof switch module comprises the following steps:

[0018] Step 1: Insert the linkage pin of the middle section of the opening and closing contact piece from the slot inside the opening and closing chamber into the outer rotating chamber, and the rotating chamber is provided with a control protrusion inside;

[0019] Step 2: Place the bottom support gasket under the ends of the separation and connection contacts, install the heat sinks one by one on the bottom support gasket, and then adjust the position of the bottom support gasket so that the notches on the inside of the heat sink align with the ends of the separation and connection contacts;

[0020] Step 3: After the position adjustment is completed, connect and fix the bottom support gasket to the metal retaining plate, then put the top support gasket on top of the heat sink fin, and then fit the inner connection end of the electrical connector to the copper contacts at both ends of the separation contact;

[0021] Step 4: After completing the flat installation of the unit shell, dock and splice the two sets of unit shells. The operating shaft needs to be inserted through the control protrusion at the splicing point, so that the on and off operation of the switch unit can be achieved through the rotation control of the operating shaft.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, the external heat dissipation kits are separately installed at both ends of the opening and closing chamber, covering the upper ends of the opening and closing contacts. The external heat dissipation kits do not directly contact the opening and closing contacts. The heat generated during the operation of the opening and closing contacts will diffuse to the surroundings. The external heat dissipation kits can absorb the heat emitted by the opening and closing contacts and conduct the heat to the external housing structure through the external conduction structure, thereby helping to quickly dissipate heat from the internal parts of the switch and avoid overheating caused by excessive operating temperature.

[0024] 2. In the present invention, b points to the auxiliary signal module, and c points to one of the switch units. The periphery of the control cam is provided with a control protrusion for disconnecting the switch unit or the auxiliary signal module. The control protrusion corresponding to the switch unit and the control protrusion corresponding to the auxiliary signal module are staggered relative to the circumference of the control shaft. By adding an auxiliary signal module and staggering the control protrusion corresponding to the switch unit and the control protrusion corresponding to the auxiliary signal module relative to the circumference of the control shaft, the auxiliary signal module has the function of increasing or delaying the generation of signals, making the explosion-proof switch module more intelligent and diversified in function.

[0025] 3. In the present invention, the position near the first mounting groove in the unit shell is filled with potting glue, and the position of the potting glue is the position shown in a. The electrical connection piece and the unit shell are processed separately to avoid the formation of an insulating layer that affects the performance, and the performance is more stable and reliable. After the unit shell is processed, it is first pressed into the shell by a pressure plate for initial alignment, and then completely fixed by the potting glue while meeting the explosion-proof performance, and can also avoid being scrapped due to the scrapping of the unit shell, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the overall front view of the present invention;

[0027] Figure 2 Schematic diagram of the cross-sectional structure of the switch unit of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the opening and closing contact piece of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the external heat dissipation kit of the present invention;

[0030] Figure 5 This is a schematic diagram of the exploded structure of the unit housing of the present invention;

[0031] Figure 6 This is a schematic diagram of the operating shaft structure of the present invention;

[0032] Figure 7 It is a schematic structural diagram of the separation and combination chamber of the present invention.

[0033] Figure: 1, switch unit; 2, operating shaft; 3, auxiliary signal module; 11, unit housing; 12, electrical connection plate; 13, external heat dissipation kit; 111, first mounting slot; 112, threaded member; 113, pressure plate; 114, fixing hole; 115, opening and closing chamber; 116, opening and closing contact; 117, ridge; 121, external connection end; 122, internal connection end; 123, mating portion; 124, folding Bend; 125, plug-in portion; 211, control protrusion; 1161, linkage pin; 1162, spring; 1163, copper contact; 1164, metal retaining plate; 1165, interlocking shaft; 1131, limit block; 1171, plug-in notch; 131, heat dissipation fin; 132, bite block; 133, top support gasket; 134, bottom support gasket; 135, assembly slot; 21, control cam. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figure 1-7An embodiment of the present invention provides an explosion-proof switch module, comprising a switch unit 1 and an operating shaft 2, wherein the switch units 1 are multiple and are stacked one on another, the switch unit 1 comprising a unit housing 11, and the unit housings 11 are two and are fitted together, and a separation chamber 115 is provided inside the unit housing 11, a separation contact 116 is provided inside the separation chamber 115, and an external heat dissipation kit 13 is provided at both ends of the separation chamber 115, a metal retaining plate 1164 is provided below the external heat dissipation kit 13, and the metal retaining plate 1164 is connected to the unit housing 11 by screws, and the metal retaining plate 1164 is provided at both ends of the separation chamber 115. An interlocking shaft 1165 is provided above both ends, and the interlocking shaft 1165 is connected to the metal fixing plate 1164 through a card slot. The external heat dissipation kit 13 is installed at both ends inside the separation and combination chamber 115, covering the top of both ends of the separation and combination contact 116. The external heat dissipation kit 13 does not directly contact the separation and combination contact 116. The heat generated during the power-on operation of the separation and combination contact 116 will diffuse to the surroundings, and the external heat dissipation kit 13 can absorb the heat emitted by the separation and combination contact 116, and conduct the heat to the external shell structure through the external conduction structure, thereby helping the internal parts of the switch to dissipate heat quickly and avoid overheating caused by excessive working temperature.

[0036] The external heat dissipation kit 13 includes heat dissipation fins 131, top support gaskets 133 and bottom support gaskets 134, and there are multiple heat dissipation fins 131. The top support gaskets 133 are arranged above the heat dissipation fins 131, and the bottom support gaskets 134 are arranged below the heat dissipation fins 131. The outer surfaces of the top support gaskets 133 and the bottom support gaskets 134 are provided with assembly slots 135, and the heat dissipation fins 131 are connected to the assembly slots 135 through bite blocks 132. The external heat dissipation kit 13 is composed of three parts: heat dissipation fins 131, top support gaskets 133 and bottom support gaskets 134. The heat dissipation fins 131 are mainly used to absorb the heat emitted by the switch parts during operation, and then the heat is further conducted to the metal fixing plate 1164 and the external shell with the help of the top support gaskets 133 and the bottom support gaskets 134 to disperse the heat, thereby playing a heat dissipation role.

[0037] The first mounting groove 111 is provided with a pressing plate 113 for pressing the matching portion 123 against the first mounting groove 111. The pressing plate 113, the matching portion 123 and the bottom of the first mounting groove 111 are coaxially provided with a fixing hole 114 for the screw member 112 to pass through and be fixed. The position near the first mounting groove 111 in the unit shell 11 is filled with potting glue. Limiting blocks 1131 are respectively provided on both sides of the pressing plate 113 and are limited to the inner side of the side wall of the unit shell 11. The first mounting groove 111 is provided with a pressing plate 113 for pressing the matching portion 123 against the first mounting groove 111. The pressing plate 113, the matching portion 123 and the bottom of the first mounting groove 111 are coaxially provided with a fixing hole 114 for the screw member 112 to pass through and be fixed. 3 and the bottom of the first mounting groove 111 are coaxially provided with a fixing hole 114 for the threaded member 112 to pass through and be fixed. The position near the first mounting groove 111 in the unit housing 11 is filled with potting glue, and the position of the potting glue is the position shown in a. The electrical connection piece 12 and the unit housing 11 are processed separately to avoid the formation of an insulating layer that affects the performance, and the performance is more stable and reliable. After the unit housing 11 is processed, it is first pressed into the housing by the pressing plate 113 for initial alignment, and then completely fixed by the potting glue while meeting the explosion-proof performance and avoiding the scrapping of the unit housing 11 due to scrapping, thereby reducing production costs.

[0038] Limit blocks 1131 are respectively provided on both sides of the pressure plate 113 and are limited to the inner side wall of the unit shell 11. The limit blocks 1131 are added to the pressure plate 113 to increase the contact area and alignment structure between the pressure plate 113 and the unit shell 11, thereby ensuring the stability of the tight fitting part 123.

[0039] Electrical connecting pieces 12 are provided at both ends of the unit shell 11. The electrical connecting piece 12 includes an external connecting end 121 located outside the unit shell 11 and an internal connecting end 122 located inside the unit shell 11. The side wall of the unit shell 11 is provided with a first mounting groove 111 that connects the inside and outside of the unit shell 11. The electrical connecting piece 12 is provided with a mating portion 123 that is adapted to the shape of the first mounting groove 111 between the external connecting end 121 and the internal connecting end 122. The electrical connecting piece 12 is provided with a bending portion 124 that is bent toward the bottom of the unit shell 11 between the mating portion 123 and the internal connecting end 122. The electrical connecting piece 12 is bent to form an inner side alignment structure to improve the initial installation accuracy and stability of the electrical connecting piece 12.

[0040] A ridge 117 is provided in the unit shell 11, and the ridge 117 is provided with a plug-in notch 1171. The electrical connection piece 12 is provided with a plug-in portion 125 that is plugged into the plug-in notch 1171 between the matching portion 123 and the inner connection end 122. The ridge 117 is additionally provided. The ridge 117 can be a component of other parts or a reinforcing rib, and a plug-in notch 1171 is provided on the ridge 117 to form a plug-in alignment structure with the electrical connection piece 12, thereby improving the initial installation accuracy and stability of the electrical connection piece 12.

[0041] One end of the switch unit 1 is provided with an auxiliary signal module 3, the operating shaft 2 corresponds to the auxiliary signal module 3, and each switch unit 1 is provided with a control cam 21 that rotates synchronously with the operating shaft 2. b points to the one corresponding to the auxiliary signal module 3, and c points to the one corresponding to one of the switch units 1. The outer periphery of the control cam 21 is provided with a control protrusion 211 for disconnecting the switch unit 1 or the auxiliary signal module 3. The control protrusion 211 corresponding to the switch unit 1 and the control protrusion 211 corresponding to the auxiliary signal module 3 are staggered relative to the circumference of the control shaft. An auxiliary signal module 3 is added, and the control protrusion 211 corresponding to the switch unit 1 and the control protrusion 211 corresponding to the auxiliary signal module 3 are staggered relative to the circumference of the control shaft, so that the auxiliary signal module 3 has the function of increasing the signal generation or delaying the signal generation, making the function of the explosion-proof switch module more intelligent and diversified.

[0042] The electrical connection piece 12 is symmetrically arranged on both sides of the unit shell 11. The unit shell 11 is provided with a separation chamber 115 surrounded by a strip wall. The inner connection end 122 of the electrical connection piece 12 located in the same unit shell 11 extends into the separation chamber 115. The separation chamber 115 is provided with a separation contact piece 116 whose two ends contact with different inner connection ends 122. The middle part of the separation contact piece 116 is provided with a linkage pin 1161 extending to the rotating cavity and moving radially along the rotating cavity to the unit shell 11. The linkage pin 1161 is subject to the rotation of the rotation cavity. When the control protrusion 211 is squeezed, the splitting contact 116 is separated from the inner connecting end 122. A spring 1162 is compressed between the splitting contact 116 and the unit housing 11 and is located on the other side of the splitting contact 116 relative to the inner connecting end 122. When the linkage pin 1161 is squeezed by the control protrusion 211, the splitting contact 116 is separated from the inner connecting end 122, so that the control shaft can control multiple switch units 1 at the same time, and the splitting and closing are consistent and rapid. The internal structure of the auxiliary signal module 3 is similar to the internal structure of the switch unit 1.

[0043] Copper contacts 1163 are provided at both ends of the split-and-close contact piece 116 , and the copper contacts 1163 are fitted and connected to the split-and-close contact piece 116 , and the split-and-close contact piece 116 is fitted and connected to the inner connecting end 122 .

[0044] An assembly process for a unit housing of an explosion-proof switch module comprises the following steps:

[0045] Step 1: Insert the linkage pin 1161 in the middle section of the split / close contact piece 116 from the slot inside the split / close chamber 115 into the outer rotating cavity, where a control protrusion 211 is provided.

[0046] Step 2: Then place the bottom support gasket 134 under the two ends of the separation contact 116, install the heat dissipation fins 131 one by one on the bottom support gasket 134, and then adjust the position of the bottom support gasket 134 so that the notches on the inner side of the heat dissipation fins 131 are aligned with the two ends of the separation contact 116;

[0047] Step 3: After the position adjustment is completed, the bottom support gasket 134 is connected and fixed to the metal retaining plate 1164. Then, the top support gasket 133 is installed on top of the heat sink 131. Then, the inner connecting end 122 of the end of the electrical connection plate 12 is aligned with the copper body contact pieces 1163 at both ends of the separation contact piece 116.

[0048] Step 4: After the unit housing 11 is flat-mounted, the two sets of unit housings 11 are docked and spliced ​​together, and the operating shaft 2 needs to be inserted through the control protrusion 211 at the splicing position, so that the switch unit 1 can be turned on and off by rotating the operating shaft 2.

[0049] In summary, the position near the first mounting groove 111 in the unit shell 11 is filled with potting glue, and the position of the potting glue is the position shown in a. The electrical connection piece 12 is processed separately from the unit shell 11 to avoid forming an insulating layer that affects the performance, and the performance is more stable and reliable. After the unit shell 11 is processed, it is first pressed into the shell by the pressure plate 113 for initial alignment, and then completely fixed by the potting glue while meeting the explosion-proof performance, and can also avoid being scrapped due to the scrapping of the unit shell 11, reducing production costs, and the linkage pin 1161 of the middle section of the separation and combination contact piece 116 is slotted from the inner side of the separation and combination chamber 115. Insert it into the outer rotating cavity, and the interior of the rotating cavity is provided with a control protrusion 211, then arrange the bottom support gasket 134 below the two ends of the separation and combination contact piece 116, install the heat dissipation fins 131 one by one on the bottom support gasket 134, then adjust the position of the bottom support gasket 134 so that the notch inside the heat dissipation fin 131 is aligned with the two ends of the separation and combination contact piece 116, after the position adjustment is completed, connect and fix the bottom support gasket 134 and the metal fixing plate 1164, then put the top support gasket 133 on the top of the heat dissipation fin 131, and then install the end of the electrical connection piece 12 The inner connecting end 122 of the end is fitted with the copper body contact pieces 1163 at both ends of the opening and closing contact piece 116. After the flat installation of the unit housing 11 is completed, the two sets of unit housings 11 are docked and spliced. The operating shaft 2 needs to be inserted from the control protrusion 211 at the splicing position. In this way, the on-off operation of the switch unit 1 can be realized by the rotation control of the operating shaft 2. The operating shaft 2 corresponds to the auxiliary signal module 3 and each switch unit 1 is provided with a control cam 21 that rotates synchronously with the operating shaft 2. b points to the corresponding auxiliary signal module 3, and c points to the corresponding one of the switch units 1. A control protrusion 211 is provided on the periphery of the control cam 21 to disconnect the switch unit 1 or the auxiliary signal module 3. The control protrusion 211 corresponding to the switch unit 1 and the control protrusion 211 corresponding to the auxiliary signal module 3 are staggered relative to the circumference of the control shaft. An auxiliary signal module 3 is added, and the control protrusion 211 corresponding to the switch unit 1 and the control protrusion 211 corresponding to the auxiliary signal module 3 are staggered relative to the circumference of the control shaft, so that the auxiliary signal module 3 has the function of increasing the signal generation or delaying the signal generation, making the function of the explosion-proof switch module more intelligent and diversified.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof switch module, comprising a switch unit (1) and an operating shaft (2), characterized in that: There are multiple switch units (1), and the switch units (1) are stacked in sequence. The switch unit (1) includes a unit shell (11), and there are two unit shells (11). The unit shells (11) are closely connected, and a separation chamber (115) is provided inside the unit shell (11), and a separation contact (116) is provided inside the separation chamber (115), and both ends of the separation chamber (115) are provided with an external heat dissipation kit (13), a metal retaining plate (1164) is provided below the external heat dissipation kit (13), and the metal retaining plate (1164) is connected to the unit shell (11) by screws, and a fitting shaft (1165) is provided above both ends of the metal retaining plate (1164), and the fitting shaft (1165) is connected to the metal retaining plate (1164) by a slot. Both ends of the unit shell (11) are provided with electrical connection pieces (12), the electrical connection piece (12) including an external connection end (121) located outside the unit shell (11) and an internal connection end (122) located inside the unit shell (11), a side wall of the unit shell (11) is provided with a first mounting groove (111) for connecting the inside and outside of the unit shell (11), and a matching portion (123) that matches the shape of the first mounting groove (111) is provided between the external connection end (121) and the internal connection end (122) of the electrical connection piece (12); A convex strip (117) is provided in the unit housing (11), and the convex strip (117) is provided with a plug-in notch (1171). The electrical connection piece (12) is provided with a plug-in portion (125) that is plugged into the plug-in notch (1171) between the matching portion (123) and the inner connection end (122). An auxiliary signal module (3) is provided on the switch unit (1) at one end of the explosion-proof switch module. The operating shaft (2) is provided with a control cam corresponding to the auxiliary signal module (3) and each switch unit (1) and rotates synchronously with the operating shaft (2); a control protrusion (211) for disconnecting the switch unit (1) or the auxiliary signal module (3) is provided on the periphery of the control cam; the control protrusion (211) corresponding to the switch unit (1) and the control protrusion (211) corresponding to the auxiliary signal module (3) are staggered relative to the circumference of the control shaft.

2. The explosion-proof switch module according to claim 1, characterized in that: The external heat dissipation kit (13) comprises a heat dissipation fin (131), a top support gasket (133) and a bottom support gasket (134), and there are multiple heat dissipation fins (131). The top support gasket (133) is arranged above the heat dissipation fin (131), and the bottom support gasket (134) is arranged below the heat dissipation fin (131). The outer surfaces of the top support gasket (133) and the bottom support gasket (134) are provided with an assembly slot (135), and the heat dissipation fin (131) is connected to the assembly slot (135) through a bite block (132).

3. The explosion-proof switch module according to claim 2, characterized in that: The first mounting groove (111) is provided with a pressing plate (113) for pressing the matching portion (123) against the first mounting groove (111); the pressing plate (113), the matching portion (123) and the bottom of the first mounting groove (111) are coaxially provided with a fixing hole (114) for the threaded member (112) to pass through and be fixed; a position near the first mounting groove (111) in the unit housing (11) is filled with potting glue, and limit blocks (1131) are respectively provided on both sides of the pressing plate (113) and are limited to the inner side of the side wall of the unit housing (11).

4. The explosion-proof switch module according to claim 3, characterized in that: The electrical connection piece (12) is provided with a bent portion (124) between the matching portion (123) and the inner connection end (122), which is bent toward the bottom of the unit housing (11).

5. The explosion-proof switch module according to claim 4, characterized in that: A linkage pin (1161) is provided in the middle of the splitting and combining contact piece (116) and extends to the rotating cavity and moves radially along the rotating cavity to the unit housing (11). When the linkage pin (1161) is squeezed by the control protrusion (211), the splitting and combining contact piece (116) is separated from the inner connecting end (122). A spring (1162) is provided between the splitting and combining contact piece (116) and the unit housing (11) and is located on the other side of the splitting and combining contact piece (116) opposite to the inner connecting end (122).

6. The explosion-proof switch module according to claim 5, characterized in that: Copper body contacts (1163) are provided at both ends of the splitting and combining contact piece (116), and the copper body contacts (1163) are fitted and connected to the splitting and combining contact piece (116), and the splitting and combining contact piece (116) is fitted and connected to the inner connection end (122).

7. A method for assembling a unit housing of an explosion-proof switch module, implemented based on the explosion-proof switch module according to claim 6, wherein: The steps include: Step 1: inserting the linkage pin (1161) of the middle section of the separation and combination contact piece (116) from the slot inside the separation and combination chamber (115) into the outer rotation cavity, wherein a control protrusion (211) is provided inside the rotation cavity; Step 2: Then, the bottom support gasket (134) is arranged below the two ends of the separation contact (116), and the heat dissipation fins (131) are installed one by one on the bottom support gasket (134), and then the position of the bottom support gasket (134) is adjusted so that the notches on the inner side of the heat dissipation fins (131) are aligned with the two ends of the separation contact (116); Step 3: After the position adjustment is completed, the bottom support gasket (134) is connected and fixed to the metal retaining plate (1164), and then the top support gasket (133) is placed on top of the heat dissipation fin (131), and then the inner connection end (122) at the end of the electrical connection piece (12) is fitted with the copper body contact pieces (1163) at both ends of the separation and combination contact piece (116); Step 4: After the unit housing (11) is flat-mounted, the two sets of unit housings (11) are docked and spliced ​​together. The operating shaft (2) needs to be inserted through the control protrusion (211) at the splicing position, so that the on-off operation of the switch unit (1) can be achieved through the rotation control of the operating shaft (2).

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