A quick locking device for terminal box of explosion-proof three-phase asynchronous motor

Abstract

This utility model relates to the field of junction box locking technology, and discloses a quick locking device for the junction box of an explosion-proof three-phase asynchronous motor. It includes a junction box assembly, a locking structure, and a heat dissipation structure. The locking structure and heat dissipation structure are respectively installed on the junction box assembly. The locking structure includes a fixing block and a limiting groove. A rotating shaft is rotatably mounted on the top of the fixing block, and a connecting plate is fixedly mounted on the top of the rotating shaft. A screw is threaded onto the end of the connecting plate away from the rotating shaft. A limiting block is rotatably mounted on the bottom of the screw, and a turntable is fixedly mounted on the top of the screw. The limiting groove and the limiting block are compatible. Through the locking structure, rotating the turntable drives the screw to rotate. As the screw moves down along the connecting plate, the position of the limiting block can be controlled, allowing it to stably engage in the limiting groove, forming a tight and secure locking structure. This eliminates the need for complex tools, improving the opening and closing efficiency of the junction box and sealing cover, and is suitable for scenarios requiring frequent maintenance of the internal wiring of the junction box.

Description

Technical Field

[0001] This utility model relates to the field of junction box locking technology, and in particular to a quick locking device for the junction box of an explosion-proof three-phase asynchronous motor. Background Technology

[0002] In the application of explosion-proof three-phase asynchronous motors, the junction box, as a crucial component for cable entry and electrical connection, needs to possess excellent sealing and reliability to ensure the safe operation of the motor in flammable and explosive environments. Traditional junction boxes are typically fixed and sealed using bolts, nuts, or glands, often requiring significant manual labor during installation and maintenance, resulting in relatively low efficiency.

[0003] In existing technologies, screws are generally used to lock the junction box and the sealing cover. This not only requires special tools but also involves multiple complex steps to complete the fixation, increasing the time cost of opening and closing the junction box. In scenarios where frequent maintenance of internal wiring is required, this will seriously affect the overall work efficiency. Utility Model Content

[0004] Given that the existing method of locking the junction box and the sealing cover generally uses screws, which requires special tools and multiple complex steps to complete the fixing, increasing the time cost of opening and closing the junction box, and seriously affecting the overall work efficiency in scenarios where frequent maintenance of internal circuits is required, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a quick locking device for the junction box of an explosion-proof three-phase asynchronous motor, comprising a junction box assembly, a locking structure, and a heat dissipation structure. The locking structure and the heat dissipation structure are respectively installed on the junction box assembly. The locking structure includes a fixing block and a limiting groove. A rotating shaft is rotatably installed at the top of the fixing block, and a connecting plate is fixedly installed at the top of the rotating shaft. A screw is threadedly installed at the end of the connecting plate away from the rotating shaft. A limiting block is rotatably installed at the bottom of the screw, and a turntable is fixedly installed at the top of the screw. The limiting groove and the limiting block are compatible.

[0006] As a preferred embodiment of the quick-locking device for the junction box of the explosion-proof three-phase asynchronous motor of the present invention, the junction box assembly includes a junction box and a sealing cover, a wiring port is provided on one side of the junction box, and a sealing groove is provided on the top of the junction box.

[0007] As a preferred embodiment of the quick-locking device for the junction box of the explosion-proof three-phase asynchronous motor of the present invention, the sealing cover is disposed on the top of the junction box, and a sealing strip adapted to the sealing groove is fixedly disposed at the bottom of the sealing cover.

[0008] As a preferred embodiment of the quick locking device for the junction box of the explosion-proof three-phase asynchronous motor of the present invention, the fixing block is fixedly installed at the four corners of the side wall of the junction box, the connecting plate is above the sealing cover, and the limiting groove is set at the four corners of the top of the sealing cover.

[0009] As a preferred embodiment of the quick-locking device for the junction box of the explosion-proof three-phase asynchronous motor of the present invention, the heat dissipation structure includes a heat dissipation groove, a fixed frame and a support frame. The heat dissipation groove is opened on the side wall of the junction box. The fixed frame is fixedly installed on the side wall of the junction box. Contact blocks are fixedly installed at the four corners inside the fixed frame. Fastening bolts are threaded on the upper and lower ends of the fixed frame respectively.

[0010] As a preferred embodiment of the quick locking device for the junction box of the explosion-proof three-phase asynchronous motor of the present invention, the support frame is arranged inside the fixed frame, and the contact block limits the support frame. A dustproof net is installed inside the support frame, and the upper and lower ends of the support frame are respectively provided with limiting holes that are compatible with the fastening bolts.

[0011] The beneficial effects of this utility model are: 1. Through the locking structure, the rotating turntable drives the screw to rotate. As the screw moves down along the connecting plate, the position of the limit block can be controlled, so that it can be stably locked into the limit groove, forming a tight and firm locking structure. It does not require complicated tools, improves the opening and closing efficiency of the junction box and the sealing cover, and is suitable for scenarios that require frequent maintenance of the internal circuit of the junction box. 2. Through the heat dissipation structure, the heat generated inside the junction box can be efficiently dissipated to the outside through the heat dissipation grooves on the side wall. By placing the support frame with the dustproof net into the fixed frame and tightening the fastening bolts to make it embed into the corresponding limit hole of the support frame, the dustproof net can be ensured to tightly cover the heat dissipation grooves, effectively blocking external dust from entering the junction box and preventing dust accumulation from affecting the operation of electrical components. At the same time, it has the characteristics of convenient disassembly, simple and efficient operation, and reduced maintenance difficulty and time cost. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the junction box of this utility model; Figure 3This is a schematic diagram of the sealing cap of this utility model; Figure 4 This is a bottom view of the sealing cap of this utility model; Figure 5 This is a schematic diagram of the locking structure of this utility model; Figure 6 This is a schematic diagram of the fixed frame of this utility model; Figure 7 This is a schematic diagram of the dustproof net of this utility model.

[0013] Explanation of reference numerals in the attached figures: 1. Junction box assembly; 11. Junction box; 12. Wiring port; 13. Sealing groove; 14. Sealing cover; 15. Sealing strip; 2. Locking structure; 201. Fixing block; 202. Rotating shaft; 203. Connecting plate; 204. Screw; 205. Limiting block; 206. Turntable; 207. Limiting groove; 3. Heat dissipation structure; 301. Heat dissipation groove; 302. Fixing frame; 303. Contact block; 304. Fastening bolt; 305. Support frame; 306. Dustproof net; 307. Limiting hole. Detailed Implementation

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] Example 1 Refer to attached figure Figure 1 - Appendix Figure 5 This is the first embodiment of the present invention, which provides a quick locking device for the junction box of an explosion-proof three-phase asynchronous motor. The device includes a junction box assembly 1, a locking structure 2, and a heat dissipation structure 3. The locking structure 2 and the heat dissipation structure 3 are respectively installed on the junction box assembly 1. The junction box assembly 1 includes a junction box 11 and a sealing cover 14. A wiring port 12 is provided on one side of the junction box 11. A sealing groove 13 is provided at the top of the junction box 11. The sealing cover 14 is provided at the top of the junction box 11. A sealing strip 15 that matches the sealing groove 13 is fixedly provided at the bottom of the sealing cover 14.

[0016] The locking structure 2 includes a fixing block 201 and a limiting groove 207. The fixing block 201 is fixedly installed at the four corners of the side wall of the junction box 11. The top of the fixing block 201 is rotatably mounted with a rotating shaft 202. The top of the rotating shaft 202 is fixedly mounted with a connecting plate 203. The connecting plate 203 is above the sealing cover 14. The end of the connecting plate 203 away from the rotating shaft 202 is threaded with a screw rod 204. The bottom end of the screw rod 204 is rotatably mounted with a limiting block 205. The top of the screw rod 204 is fixedly mounted with a turntable 206. The limiting groove 207 is set at the four corners of the top of the sealing cover 14. The limiting groove 207 and the limiting block 205 are compatible.

[0017] During use, first connect the cable to the inside of the junction box 11 through the wiring port 12 on one side of the junction box 11 and complete the wiring operation. Then, close the sealing cover 14 on the top of the junction box 11, ensuring that the sealing strip 15 at the bottom of the sealing cover 14 is accurately embedded in the sealing groove 13 at the top of the junction box 11 to achieve a seal. Next, rotate the connecting plate 203 to flip the connecting plate 203 above the sealing cover 14. Then, rotate the turntable 206 at the top of the screw 204 to move the screw 204 downward along the connecting plate 203 until the limiting block 205 at the bottom of the screw 204 is engaged in the limiting groove 207 at the four corners of the top of the sealing cover 14, thus completing the quick locking of the junction box 11.

[0018] Example 2 Refer to attached figure Figure 2 , Figure 6 and attached Figure 7 This is the second embodiment of the present invention, which differs from the first embodiment in that: The heat dissipation structure 3 includes a heat dissipation slot 301, a fixed frame 302, and a support frame 305. The heat dissipation slot 301 is formed on the side wall of the junction box 11. The fixed frame 302 is fixedly installed on the side wall of the junction box 11, and the heat dissipation slot 301 is inside the fixed frame 302. Contact blocks 303 are fixedly installed at the four corners inside the fixed frame 302. Fastening bolts 304 are threaded on the upper and lower ends of the fixed frame 302. The support frame 305 is set inside the fixed frame 302, and the contact blocks 303 limit the support frame 305. A dustproof net 306 is installed inside the support frame 305 to prevent dust from entering the heat dissipation slot 301. Limiting holes 307 that are compatible with the fastening bolts 304 are respectively provided at the upper and lower ends of the support frame 305.

[0019] During use, the heat generated inside is dissipated outward through the heat dissipation slots 301 on the side wall, achieving heat dissipation and cooling inside the junction box 11. The support frame 305 with the dustproof net 306 is placed into the fixed frame 302. The contact blocks 303 at the four corners inside the fixed frame 302 will position and limit the support frame 305. Then, the fastening bolts 304 are tightened so that the fastening bolts 304 are embedded in the corresponding limiting holes 307 at the upper and lower ends of the support frame 305, thereby firmly fixing the support frame 305 and the dustproof net 306 in the fixed frame 302. At this time, the dustproof net 306 can protect the heat dissipation slots 301 from dust.

[0020] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A quick-locking device for the junction box of an explosion-proof three-phase asynchronous motor, characterized in that: The assembly includes a junction box assembly (1), a locking structure (2), and a heat dissipation structure (3). The locking structure (2) and the heat dissipation structure (3) are respectively installed on the junction box assembly (1). The locking structure (2) includes a fixing block (201) and a limiting groove (207). A rotating shaft (202) is rotatably installed at the top of the fixing block (201). A connecting plate (203) is fixedly installed at the top of the rotating shaft (202). A screw (204) is threadedly installed at one end of the connecting plate (203) away from the rotating shaft (202). A limiting block (205) is rotatably installed at the bottom of the screw (204). A turntable (206) is fixedly installed at the top of the screw (204). The limiting groove (207) and the limiting block (205) are compatible.

2. The quick locking device of terminal box of flame-proof type three-phase asynchronous motor according to claim 1, characterized in that: The junction box assembly (1) includes a junction box (11) and a sealing cover (14). A wiring port (12) is provided on one side of the junction box (11), and a sealing groove (13) is provided on the top of the junction box (11).

3. The quick-locking device for the junction box of the explosion-proof three-phase asynchronous motor according to claim 2, characterized in that: The sealing cover (14) is located on the top of the junction box (11), and a sealing strip (15) that matches the sealing groove (13) is fixedly provided at the bottom of the sealing cover (14).

4. The quick locking device of terminal box of flame-proof type three-phase asynchronous motor according to claim 1, characterized in that: The fixing block (201) is fixedly installed at the four corners of the side wall of the junction box (11), the connecting plate (203) is above the sealing cover (14), and the limiting groove (207) is set at the four corners of the top of the sealing cover (14).

5. The quick-locking device for the junction box of the explosion-proof three-phase asynchronous motor according to claim 1, characterized in that: The heat dissipation structure (3) includes a heat dissipation groove (301), a fixed frame (302) and a support frame (305). The heat dissipation groove (301) is opened on the side wall of the junction box (11). The fixed frame (302) is fixedly installed on the side wall of the junction box (11). Contact blocks (303) are fixedly installed at the four corners inside the fixed frame (302). Fastening bolts (304) are threaded on the upper and lower ends of the fixed frame (302).

6. The quick-locking device for the junction box of the explosion-proof three-phase asynchronous motor according to claim 5, characterized in that: The support frame (305) is located inside the fixed frame (302), and the contact block (303) limits the support frame (305). A dustproof net (306) is installed inside the support frame (305). Limiting holes (307) that are compatible with fastening bolts (304) are respectively provided at the upper and lower ends of the support frame (305).

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