External speed reducer explosion-proof transmission structure and driving chassis

Abstract

The utility model discloses an external speed reducer explosion -proof transmission structure and drive chassis cooperate with the installation with speed reducer, motor, and this transmission structure includes the connecting seat and fixed seat of detachable connection, is equipped with the rotating pin of penetrating and rotation connection in connecting seat, and the one end of rotating pin is equipped with the plug -in pin of coaxial outward extension, and the other end of rotating pin is equipped with the plug -in recess of coaxial inward recess, connecting seat is close to the one end of rotating pin and has the baffle, and fixed seat is adjacent with the plug -in recess, and connecting seat is connected with fixed seat to make the baffle and fixed seat constitute the installation clamping space. Transmission structure can realize the connection of speed reducer and motor, and the connecting distance of motor and speed reducer is increased by the connecting seat and fixed seat of detachable connection, and the installation of speed reducer external, motor built -in can be realized by connecting seat and fixed seat, is favorable to the small size design of explosion -proof cabin, can also reduce the temperature rise speed in explosion -proof cabin, increases the service life of motor.

Description

Technical Field

[0001] This utility model relates to the field of transmission structure technology for explosion-proof robots, and in particular to an explosion-proof transmission structure with an external reducer and a drive chassis. Background Technology

[0002] Explosion-proof robots are mainly used in special fields to replace manual inspections. These robots are equipped with various industry-specific sensors for data collection and intelligent analysis, achieving automation, informatization, and intensification. They largely replace manual labor in completing most inspection tasks, reducing inspection costs, improving inspection efficiency and quality, and preventing harm to the life and health of inspection personnel.

[0003] All components on an explosion-proof robot must meet explosion-proof requirements during design. For example, components such as drive motors need to be housed within the robot's explosion-proof compartment to ensure their explosion-proof performance. As shown in patent application number CN201610622972.3, entitled "An Explosion-Proof Firefighting and Reconnaissance Robot," the robot's drive chassis includes an explosion-proof compartment and two tracked drive mechanisms. The drive wheels of the tracked drive mechanisms are driven by a motor and a reducer. Both the reducer and the motor are housed within the explosion-proof compartment, and the output end of the reducer is connected to the drive wheels, thus meeting the robot's explosion-proof requirements.

[0004] In the aforementioned patent, the connection between the motor and the reducer is conventional, involving plugging and fixing the motor's output shaft to the reducer's input end to achieve the transmission connection. This method means the motor's output end cannot be exposed outside the explosion-proof enclosure, thus requiring the reducer to be installed inside the enclosure as well. However, this method not only requires a large explosion-proof enclosure for the motor and reducer, but also results in both components generating more heat during operation because they are both located inside the enclosure. Without a cooling mechanism, the motor's lifespan will be affected; however, adding a cooling mechanism would further increase the robot's size, hindering the design of a compact robot. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an external speed reducer explosion-proof transmission structure and drive mechanism. The improvement of the speed reducer transmission structure allows the speed reducer to be installed outside the explosion-proof compartment of the drive mechanism, which is beneficial for the compact design of the explosion-proof compartment. At the same time, it can also reduce the rate of temperature rise inside the explosion-proof compartment and increase the service life of the motor.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an external speed reducer explosion-proof transmission structure, which is installed in conjunction with a speed reducer and a motor. This transmission structure includes a detachable connecting seat and a fixed seat.

[0007] The connector is provided with a through-hole and rotatably connected rotating pin. One end of the rotating pin is provided with a coaxially extending insertion pin, and the other end of the rotating pin is provided with a coaxially recessed insertion groove.

[0008] The connecting seat has a baffle at one end near the rotating pin, and the fixed seat is adjacent to the insertion groove. The connecting seat and the fixed seat are connected so that the baffle and the fixed seat form an installation snap-fit ​​space.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] Understandably, the transmission structure enables the connection between the reducer and the motor. The rotating pin on the connecting seat effectively extends the output shaft of the motor. The connecting seat, equipped with the rotating pin, also features a baffle, which functions as a snap-fit. During installation, the length of the connecting seat is appropriately determined based on the structure of the installation location (such as an explosion-proof chamber). After the connecting seat passes through the installation location, the transmission structure and the installation location are connected via the connection between the connecting seat and the fixed seat. Then, the motor's output shaft is fixed to the insertion groove, and the insertion pin is fixed to the input end of the reducer. This allows for an external reducer and internal motor installation. Simultaneously, the baffle on the connecting seat facilitates connection to both the explosion-proof chamber and the reducer end, enhancing explosion-proof performance. This external installation of the reducer is beneficial for the compact design of the explosion-proof chamber and also reduces the rate of temperature rise within the chamber, increasing the motor's lifespan.

[0011] Furthermore, the connecting seat has a cylindrical structure, the rotating pin is coaxially arranged with the connecting seat, and the baffle is connected to the end of the connecting seat and extends outward;

[0012] The fixing seat has a ring-shaped plate structure, and the end of the fixing seat is detachably connected to the connecting seat.

[0013] Furthermore, the side of the baffle away from the fixed seat is provided with an annular protrusion structure to assist in the installation of the reducer;

[0014] The mounting base has an inwardly recessed annular mounting groove on the side away from the baffle to assist in motor installation.

[0015] Furthermore, the protrusion structure has a stepped recessed structure inside, which has a detachable explosion-proof plate, and a second sealing ring is provided between the explosion-proof plate and the stepped recessed structure.

[0016] Furthermore, the pin is provided with an outwardly protruding auxiliary mounting ring, and the explosion-proof plate is provided with a placement groove to avoid the auxiliary mounting ring.

[0017] Furthermore, a first sealing ring is provided on the inner side of the baffle.

[0018] This application also provides a drive chassis, including an explosion-proof compartment and two track drive mechanisms. Each track drive mechanism includes a drive wheel and a drive assembly. The drive assembly includes a reducer, a motor, and the aforementioned transmission structure.

[0019] The speed reducer is located outside the explosion-proof compartment, while the motor is located inside. The transmission structure is installed in conjunction with the side wall of the explosion-proof compartment to connect the speed reducer and the motor.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Based on the transmission structure, the reducer, which originally needed to be installed inside the explosion-proof compartment in the drive chassis, can be placed outside the explosion-proof compartment. This facilitates the small-volume design of the explosion-proof compartment, and can also minimize the need for heat dissipation mechanisms in the explosion-proof compartment, thereby reducing the production cost of the robot and contributing to the lightweight design of the robot.

[0022] Furthermore, the explosion-proof compartment has two mounting holes on its side wall, which are respectively fitted with two drive components for installation;

[0023] The connecting seat is inserted into the mounting hole, and the inner wall of the baffle is sealed and fitted to the outer wall of the explosion-proof compartment. The fixing seat is located inside the explosion-proof compartment and fixed to the connecting seat, so that the baffle and the fixing seat are clamped and fixed to the explosion-proof compartment along both sides of the mounting hole. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a transmission structure of the present invention that is installed in conjunction with a reducer, motor, explosion-proof compartment and drive wheel;

[0025] Figure 2 for Figure 1 A structural diagram from another perspective;

[0026] Figure 3 This is a schematic diagram of a transmission structure of the present invention that is installed in conjunction with a reducer, a motor, and an explosion-proof chamber.

[0027] Figure 4 This is a schematic diagram of a drive chassis in this utility model.

[0028] In the diagram: Load wheel assembly 600, road wheel assembly 500, limit arm 520, drive wheel 220, track 100, explosion-proof compartment 400, motor 460, reducer 450, tension guide wheel assembly 300, transmission structure 800, connecting seat 810, fixed seat 820, annular mounting groove 821, rotating pin 830, insertion pin 831, auxiliary mounting ring 8311, insertion groove 832, baffle 840, protrusion structure 841, explosion-proof plate 842, second sealing ring 843, first sealing ring 844. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] like Figure 1 , 2 As shown in Figure 3, an explosion-proof transmission structure for an external speed reducer is installed in conjunction with a speed reducer 450 and a motor 460. The transmission structure 800 includes a detachable connecting seat 810 and a fixed seat 820. The connecting seat 810 has a through-hole and rotatably connected rotating pin 830. One end of the rotating pin 830 has a coaxially extending insertion pin 831, and the other end of the rotating pin 830 has a coaxially recessed insertion groove 832. The end of the connecting seat 810 near the rotating pin 830 has a baffle 840. The fixed seat 820 is adjacent to the insertion groove 832. The connecting seat 810 and the fixed seat 820 are connected so that the baffle 840 and the fixed seat 820 form an installation and locking space.

[0031] Understandably, the transmission structure 800 connects the reducer 450 and the motor 460. The rotating pin 830 on the connecting seat 810 effectively extends the output shaft of the motor 460. The connecting seat 810, equipped with the rotating pin 830, also features a baffle 840, which functions as a snap-fit ​​component. During installation, the length of the connecting seat 810 is appropriately set based on the structure of the installation location (such as the explosion-proof compartment 400). After the connecting seat 810 passes through the installation location, the connection between the connecting seat 810 and the fixed seat 820 allows the transmission structure 800 and the motor 460 to be connected. The motor 460 is connected to the mounting position, and then the output shaft of the motor 460 is fixed to the insertion groove 832. The insertion pin 831 is fixed to the input end of the reducer 450, which can realize the installation of the reducer 450 externally and the motor 460 internally. At the same time, the baffle 840 set on the connecting seat 810 can facilitate the connection with the explosion-proof compartment 400 and the connection of the end of the reducer 450, which is more effective in explosion protection. This realizes the external installation of the reducer 450, which is beneficial to the small size design of the explosion-proof compartment 400. It can also reduce the rate of temperature rise inside the explosion-proof compartment 400 and increase the service life of the motor 460.

[0032] The connecting seat 810 and the fixing seat 820 engage to secure the installation location. Therefore, the shape of the connecting seat 810 is designed according to the structure of the installation location. For example, if the through hole at the installation location is cylindrical, the connecting seat 810 will be a cylindrical structure that fits the through hole; if the through hole is rectangular, the connecting seat will be a rectangular cylindrical structure. The baffle 840 extends outwards. Similarly, it is only necessary to ensure that the baffle 840 covers the through hole at the installation location. Therefore, the projection of the outer shape of the baffle 840 can be circular, rectangular, or any other arbitrary structure.

[0033] Correspondingly, the fixing seat 820 is located at the end of the connecting seat 810 and fixed to the connecting seat 810. At least it must be ensured that the fixing seat 820 can cover the end of the connecting seat 810 so that the combination of the fixing seat 820, the baffle 840 and the connecting seat 810 is similar to an I-beam structure, clamping and fixing the through hole (or through groove) at the installation position, providing more installation methods for the combination of the reducer 450 and the motor 460.

[0034] In this application, the transmission structure 800 is mainly used in explosion-proof robots so that the reducer 450 can be externally mounted. The reducer 450 and the motor 460 are connected via a rotating pin 830 (shaft structure). The rotating shaft rotates within the connecting seat 810 via multiple bearings. Considering the balance of the connection force, the connecting seat 810 is designed as a cylindrical structure. This ensures that after the connecting seat 810 is fixed to the installation position, when the rotating pin 830 is in use, the connection point between the transmission structure 800 and the installation position (explosion-proof compartment 400, etc.) experiences more balanced force. Therefore, as... Figure 3 As shown, the connecting seat 810 of this application has a cylindrical structure. The rotating pin 830 is coaxially arranged with the connecting seat 810. The baffle 840 is connected to the end of the connecting seat 810 and extends outward. The baffle 840 is a ring-shaped plate structure coaxially arranged with the connecting seat 810. The baffle 840 is sealed and fixed to the outer wall of the explosion-proof compartment 400 (or other installation position). The fixing seat 820 also adopts a ring-shaped plate structure. The fixing seat 820 covers the end of the connecting seat 810 and is detachably connected to the connecting seat 810. The fixing seat 820 is fixedly connected to the motor 460. The output shaft of the motor 460 is embedded in the insertion groove 832 and fixed with the rotating pin 830. After the motor 460, transmission structure 800 and reducer 450 are assembled, the motor 460 can drive the reducer 450 to rotate. Then the drive wheel 220 (or other components) connected to the reducer 450 can rotate.

[0035] Since the reducer 450 is located outside the explosion-proof compartment 400 (or other components), to enhance the sealing effect of the connection between the baffle 840 and the explosion-proof compartment 400, this application provides a first sealing ring 844 on the inner side of the baffle 840. For example... Figure 3 As shown, the first sealing ring 844 is sleeved on the connecting seat 810 and positioned close to the baffle 840. A groove-shaped structure for embedding the first sealing ring 844 is provided on the outer wall of the explosion-proof chamber 400. The setting of the first sealing ring 844 can increase the sealing effect between the baffle 840, the connecting seat 810 and the explosion-proof chamber 400.

[0036] The baffle 840 needs to be fixed to the reducer 450 and the installation location (side wall of the explosion-proof compartment 400, etc.). Considering the structure of the installation location (circular through hole) and the structure of the reducer 450, the baffle 840 of this application has an annular protrusion structure 841 on the side away from the fixing seat 820 to assist in the installation of the reducer 450. The protrusion structure 841 is used to engage the reducer 450. After the reducer 450 is engaged on the baffle 840, it can be locked in place using multiple fixing bolts. At this time, the insertion pin 831 is inserted into the input end of the reducer 450. Similarly, to facilitate the connection between the fixing seat 820, the connecting seat 810, and the motor 460, this application has an inwardly recessed annular mounting groove 821 on the side of the fixing seat 820 away from the baffle 840 to assist in the installation of the motor 460. The annular mounting groove 821 can engage the end of the motor 460, and then multiple fixing bolts are used to fix the motor 460 to the fixing seat 820.

[0037] To enhance the explosion-proof effect at the connection between the reducer 450 and the transmission structure 800, this application includes a stepped recessed structure inside the protrusion structure 841. This stepped recessed structure has a detachably connected explosion-proof plate 842, and a second sealing ring is provided between the explosion-proof plate 842 and the stepped recessed structure. The insertion pin 831 has an outwardly protruding auxiliary mounting ring 8311, and the explosion-proof plate 842 has a groove to accommodate this auxiliary mounting ring 8311. Figure 3 As shown, the stepped recessed structure is a stepped groove formed by two recessed grooves facing the inner wall of the baffle 840. The auxiliary mounting ring 8311 is fixed to the insertion pin 831 along the bottom of the groove of the stepped recessed structure, so that the connecting seat 810 and the rotating pin 830 can form a snap-fit ​​structure. The explosion-proof plate 842 is covered on the auxiliary mounting ring 8311 and fixed to the outside of the baffle 840. The second sealing ring 843 is located between the explosion-proof plate 842 and the inner wall of the recessed groove inside the stepped recessed structure. The explosion-proof plate 842, the stepped recessed structure, the second sealing ring 843 and the auxiliary mounting ring 8311 of this application can significantly improve the explosion-proof effect of the insertion pin 831 and the connecting seat 810, thereby ensuring the explosion-proof effect of the reducer 450 and the baffle 840, so that the transmission structure 800 also has a certain explosion-proof effect.

[0038] The transmission structure 800 of this application is mainly used to connect the motor 460 and the reducer 450 on the explosion-proof robot, so that the reducer 450 can be installed outside the explosion-proof compartment 400. To this end, in conjunction with the transmission structure 800, this application also provides a drive chassis, including the explosion-proof compartment 400 and two track 100 drive mechanisms. Each track 100 drive mechanism includes a drive wheel 220 and a drive assembly. The drive assembly includes a reducer 450, a motor 460 and the aforementioned transmission structure 800. The reducer 450 is located outside the explosion-proof compartment 400, and the motor 460 is located inside the explosion-proof compartment 400. The transmission structure 800 is installed in cooperation with the side wall of the explosion-proof compartment 400 to connect the reducer 450 and the motor 460. The overall principle and structure of the track 100 drive mechanism can be set with reference to existing technology (CN201610622972.3). The transmission structure 800, motor 460, and reducer 450 are used to drive the drive wheel 220 of the track 100 drive mechanism. Figure 4 As shown, the track 100 drive mechanism of this application is similar to the prior art, including drive wheels 220 and tension guide wheel sets arranged at intervals, and multiple load-bearing wheel sets 500 located in the middle. Except for the load-bearing wheel sets 500 adjacent to the drive wheels 220, the remaining load-bearing wheel sets 500 are hinged to the outer wall of the explosion-proof compartment 400 and are provided with shock absorbers (spring shock absorbers) between them and the explosion-proof compartment 400. The load-bearing wheel sets 500 adjacent to the drive wheels 220 are hinged to the drive wheels 220 through limiting arms 520, and shock-absorbing springs are also provided between the load-bearing wheel sets 500 and the explosion-proof compartment 400. The tension guide wheel sets are divided into tension wheel sets and guide wheel sets. Shock absorbers are provided between the tension wheel sets and the outer wall of the explosion-proof compartment 400. The tension wheel sets and guide wheel sets are connected by a triangular swing arm, and the swing arm is hinged to the explosion-proof compartment 400. Each load-bearing wheel assembly 500, guide wheel assembly, and tension wheel assembly includes two rolling wheels and a rolling shaft between them. The rolling shaft is rotatably connected to the two rolling wheels via bearings, and the rolling shaft is oscillatingly connected to the explosion-proof compartment 400 (or fixedly connected to the limit arm 520, or fixedly connected to the swing arm) to form the structure shown in the figure. The principle of the track 100 drive mechanism in this application is the same as that of the prior art, mainly by rotating the drive wheel 220 to drive the track 100 to roll and move. However, in this application, the load-bearing wheel assembly 500 adjacent to the drive wheel 220 is connected to the drive wheel 220 via a limiting arm 520, so that the load-bearing wheel rotates along the drive wheel 220 during use. Due to the presence of the limiting arm 520, the distance between the center of the load-bearing wheel assembly 500 and the center of the drive wheel 220 is essentially limited to a constant (basically equivalent to the length of the limiting arm 520). Therefore, regardless of the volume of the obstacle encountered or the position to which the load-bearing wheel assembly 500 swings, the suspension distance remains constant and will not change with the volume of the obstacle. This ensures that the entire drive system has sufficient grounding distance and guarantees the performance of the entire drive system.

[0039] Meanwhile, the reducer 450 and motor 460, which provide power to the drive wheel 220 in this application, also have different connection methods. The reducer 450 is a right-angle reducer 450, which is located outside the explosion-proof compartment 400 and connected to the motor 460 inside the explosion-proof compartment 400 via the transmission structure 800. To facilitate the installation of the reducer 450, transmission structure 800, and motor 460, this application provides two mounting holes on the side wall of the explosion-proof compartment 400. The two mounting holes are respectively fitted with the two drive components for installation. The connecting seat 810 is inserted into the mounting hole, and the inner wall of the baffle 840 is sealed and fitted to the outer wall of the explosion-proof compartment 400. The fixing seat 820 is located inside the explosion-proof compartment 400 and fixed to the connecting seat 810, so that the baffle 840 and the fixing seat 820 are clamped and fixed to the explosion-proof compartment 400 along both sides of the mounting hole.

[0040] Based on the transmission structure 800, the drive chassis of this application can move the reducer 450, which originally needed to be installed inside the explosion-proof compartment 400, to the outside of the explosion-proof compartment 400. This facilitates the small-volume design of the explosion-proof compartment 400 and minimizes the need for a heat dissipation mechanism in the explosion-proof compartment 400, thereby reducing the production cost of the robot and contributing to its lightweight design.

[0041] A rotary sealing ring is provided between the rotating pin 830 and the connecting seat 810. In order to ensure the sealing performance, other components also need to be provided with corresponding sealing grooves and sealing ring mating structures to ensure the sealing effect or explosion-proof performance.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An explosion-proof transmission structure for an external speed reducer, which is installed in conjunction with a speed reducer (450) and a motor (460), characterized in that: The transmission structure (800) includes a detachable connecting seat (810) and a fixed seat (820); The connecting seat (810) is provided with a through and rotatably connected rotating pin (830). One end of the rotating pin (830) is provided with a coaxially extending insertion pin (831), and the other end of the rotating pin (830) is provided with a coaxially recessed insertion groove (832). The connecting seat (810) has a baffle (840) at one end near the rotating pin (830), and the fixed seat (820) is adjacent to the insertion groove (832). The connecting seat (810) is connected to the fixed seat (820) so that the baffle (840) and the fixed seat (820) form an installation snap-fit ​​space.

2. The explosion-proof transmission structure for the external speed reducer according to claim 1, characterized in that: The connecting seat (810) has a cylindrical structure, the rotating pin (830) is coaxially arranged with the connecting seat (810), and the baffle (840) is connected to the end of the connecting seat (810) and extends outward; The fixing seat (820) has a ring-shaped plate structure, and the fixing seat (820) covers the end of the connecting seat (810) and is detachably connected to the connecting seat (810).

3. The explosion-proof transmission structure for an external speed reducer according to claim 1 or 2, characterized in that: The baffle (840) has an annular protrusion structure (841) on the side away from the fixed seat (820) to assist in the installation of the reducer (450); The mounting base (820) has an inwardly recessed annular mounting groove (821) on the side away from the baffle (840) for assisting in the installation of the motor (460).

4. The explosion-proof transmission structure for the external speed reducer according to claim 3, characterized in that: The protrusion structure (841) has a stepped recessed structure inside, and the stepped recessed structure has a detachable explosion-proof plate (842). A second sealing ring (843) is provided between the explosion-proof plate (842) and the stepped recessed structure.

5. The explosion-proof transmission structure for the external reducer according to claim 4, characterized in that: The plug pin (831) is provided with an outwardly protruding auxiliary mounting ring (8311), and the explosion-proof plate (842) is provided with a placement groove to avoid the auxiliary mounting ring (8311).

6. The explosion-proof transmission structure for an external speed reducer according to claim 1, 2, 4 or 5, characterized in that: A first sealing ring (844) is provided on the inner side of the baffle (840).

7. A drive chassis, characterized in that: It includes an explosion-proof compartment (400) and two track (100) drive mechanisms. Each track (100) drive mechanism includes a drive wheel (220) and a drive assembly. The drive assembly includes a reducer (450), a motor (460), and an external reducer explosion-proof transmission structure (800) as described in any of claims 1-6. The speed reducer (450) is located outside the explosion-proof compartment (400), and the motor (460) is located inside the explosion-proof compartment (400). The transmission structure (800) is installed in conjunction with the side wall of the explosion-proof compartment (400) to connect the speed reducer (450) and the motor (460).

8. The drive chassis according to claim 7, characterized in that: The explosion-proof compartment (400) has two mounting holes on its side wall, which are respectively used to install two drive components; The connecting seat (810) is inserted into the mounting hole, and the inner wall of the baffle (840) is sealed and fitted to the outer wall of the explosion-proof compartment (400). The fixing seat (820) is located inside the explosion-proof compartment (400) and fixed to the connecting seat (810), so that the baffle (840) and the fixing seat (820) are clamped and fixed to the explosion-proof compartment (400) along both sides of the mounting hole.

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