High strength waterproof travel switch

Abstract

The utility model belongs to electrical switch technical field discloses high strength waterproof travel switch, including body, junction box, sealing mechanism and quick -mounting mechanism, the body bottom is installed with junction box, the body outside is installed with sealing mechanism, junction box right -hand member is installed with quick -mounting mechanism, the contact head threaded connection in sealing mechanism two extrudes sealing ring no.

Description

Technical Field

[0001] This utility model relates to the field of electrical switch technology, and in particular to a high-strength waterproof limit switch. Background Technology

[0002] Limit switches, as a commonly used electrical control component, are widely used in various mechanical equipment to achieve position detection and travel control. In actual industrial production environments, limit switches need to face harsh working conditions such as humidity, dust, and even oil splashes. This places extremely high demands on the sealing and protection performance of the switch itself. However, existing limit switches rely only on simple interference fits or single-layer sealing rings for protection at the housing splicing points and actuating contact points. With the passage of time and changes in ambient temperature, these parts will experience aging or loosening of the seals, causing external water, oil, and dust to seep into the switch, leading to electrical short circuits or poor contact and other faults.

[0003] Besides insufficient sealing performance, existing limit switches also have obvious defects in their connection methods with external cables. Traditional connection methods use rigid threaded joints or direct cable locking heads. This rigid connection lacks the necessary buffering mechanism. When the equipment operates and generates severe vibrations or the external conduit is accidentally impacted, the impact force will be directly transmitted to the switch body and internal terminals, causing the connection to break or the internal wires to loosen. In addition, the existing conduit connection structure often requires rotating the entire conduit to tighten the threads during installation. This is not only cumbersome to operate, but also causes the internal wiring to be pulled due to the twisting of the conduit, resulting in low installation efficiency and safety hazards.

[0004] Therefore, this utility model proposes a high-strength waterproof limit switch to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems of existing limit switches, such as poor protection performance in harsh environments due to simple sealing structure, easy water and dust ingress damaging internal components, and rigid external cable connection with lack of buffer protection and low connection reliability due to wire twisting during installation, this utility model aims to provide a high-strength waterproof limit switch with improved structure that can effectively solve the above problems.

[0006] This utility model provides a high-strength waterproof limit switch, including a body, a junction box installed at the bottom of the body, a sealing mechanism installed on the outside of the body, and a quick-release mechanism installed at the right end of the junction box; The sealing mechanism includes a sealing sleeve fixedly connected to the top left side of the machine body. A contact head is threadedly connected to the upper middle part of the inner side of the sealing sleeve. A second sealing ring is fixedly connected to the bottom of the inner wall of the sealing sleeve. The bottom of the contact head contacts and presses against the second sealing ring. Furthermore, the quick-installation mechanism includes an outlet tube fixedly connected to the right end of the junction box. A buffer pad is fixedly connected to the left end of the outlet tube. A sliding rod is fixedly connected around the right end of the inner wall of the outlet tube. A connector is inserted into the right end of the outlet tube. A sliding groove is formed around the left end of the outer wall of the connector. The sliding rod is slidably connected inside the sliding groove. The left end of the connector contacts and presses against the buffer pad. A limit ring is fixedly connected to the outer wall of the connector. A fixing sleeve is rotatably connected between the outer wall of the connector and the limit ring. The fixing sleeve is threadedly connected to the outlet tube.

[0007] Preferably, a nut is threaded onto the middle of the outer wall of the contact head, and the nut abuts against the top of the sealing sleeve.

[0008] Preferably, the outer wall of the wiring conduit is fixedly connected with a plurality of limiting rings at equal intervals.

[0009] Preferably, a sealing gasket is provided on the left side of the limiting ring and sleeved on the outer wall of the connecting pipe. The sealing gasket is located between the outlet pipe and the limiting ring, and the sealing gasket fills the gap between the outlet pipe and the connecting pipe.

[0010] Preferably, the left and right ends of the machine body are fixedly connected with buckles, and the left and right ends of the junction box are fixedly connected with connecting plates, which engage with the buckles.

[0011] Preferably, a sealing ring is installed on the contact surface between the body and the junction box.

[0012] Preferably, the number and position of the slide rods and the slide grooves correspond, and the wiring conduit moves axially along the outlet conduit through the cooperation of the slide rods and the slide grooves.

[0013] Preferably, the fixing sleeve is fitted onto the outer wall of the wiring conduit, and the fixing sleeve is located between the limiting ring and the outlet pipe. The limiting ring is used to prevent the fixing sleeve from detaching from the wiring conduit.

[0014] This utility model has the following beneficial effects: 1. This utility model solves the problem of water, oil, and dust ingress into the housing seams and moving parts of existing limit switches under harsh working conditions, which leads to damage to internal components. It achieves a comprehensive multi-layer sealing protection effect and significantly improves the service life and reliability of the equipment. By setting a buckle and sealing ring one at the connection between the body and the junction box, and setting an internal pressure sealing sleeve and sealing ring two at the contact head on the top of the body, and cooperating with the secondary locking of the external nut, this utility model solves the problem of water, oil, and dust ingress into the housing seams and moving parts of existing limit switches under harsh working conditions.

[0015] 2. This utility model solves the problems of traditional switch cable connection methods, such as high rigidity, poor impact resistance, and loosening of internal wiring due to pipeline twisting during installation, by setting a sliding rod and buffer pad inside the outlet pipe of the junction box, and cooperating with the sliding groove, limit ring and threaded connection fixing sleeve on the junction pipe. It achieves the effects of rapid positioning guidance, flexible energy absorption buffer and anti-rotation locking, and effectively prevents interface breakage and wear caused by vibration or collision.

[0016] 3. This utility model solves the problem of dust and moisture seeping into the movable gap in the quick-connect structure by setting a sealing gasket between the end of the outlet pipe and the limiting ring, and using the axial thrust when the fixed sleeve is tightened to compress the sealing gasket. This achieves the effect of ensuring a high level of waterproof and dustproof effect at the interface while realizing the quick disassembly and assembly of the pipeline, and ensures the dryness and cleanliness of the electrical connection environment. Attached Figure Description

[0017] Figure 1 This is a perspective view of the high-strength waterproof limit switch proposed in this utility model; Figure 2 This is a front view of the high-strength waterproof limit switch proposed in this utility model; Figure 3 This is a partial structural diagram of the high-strength waterproof limit switch proposed in this utility model; Figure 4 This is a partial structural schematic diagram of the high-strength waterproof limit switch proposed in this utility model; Figure 5 This is a schematic diagram of the quick-release mechanism for the high-strength waterproof limit switch proposed in this utility model.

[0018] Legend: 1. Body; 2. Sealing mechanism; 201. Connecting plate; 202. Buckle; 203. Sealing ring one; 204. Sealing sleeve; 205. Sealing ring two; 206. Contact head; 207. Nut; 3. Quick-release mechanism; 301. Outlet pipe; 302. Buffer pad; 303. Slide rod; 304. Connecting pipe; 305. Limiting ring; 306. Slide groove; 307. Sealing gasket; 308. Fixing sleeve; 4. Junction box. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model. Example

[0020] Please refer to Figures 1 to 5 This utility model provides a high-strength waterproof limit switch, which aims to solve the technical problems in the prior art where the poor sealing performance of the limit switch leads to the internal components being easily damaged by moisture, and the cable connection has weak impact resistance and is difficult to disassemble and assemble.

[0021] Please refer to Figure 1 and Figure 2 The high-strength waterproof limit switch includes a body 1, a junction box 4 fixedly installed at the bottom of the body 1, a sealing mechanism 2 installed on the outside of the body 1, and a quick-connect mechanism 3 installed on the right end of the junction box 4. The body 1 serves as a protective housing for electrical components, the junction box 4 is used to accommodate wiring connection nodes, the sealing mechanism 2 is used to seal the moving parts and splicing gaps of the body 1 in all directions, and the quick-connect mechanism 3 is used to realize the quick connection and flexible buffering of the external conduit and the switch body.

[0022] Please refer to Figure 1 and Figure 2 The sealing mechanism 2 includes a sealing sleeve 204 fixedly connected to the top left side of the body 1. The sealing sleeve 204 is a hollow tubular component. An internal thread is formed on the upper middle part of the inner side of the sealing sleeve 204, and a contact head 206 is threadedly connected thereto. The contact head 206 serves as a trigger for receiving external mechanical stroke signals. A second sealing ring 205 is fixedly connected to the bottom of the inner wall of the sealing sleeve 204. The second sealing ring 205 is located directly below the contact head 206. When the contact head 206 is screwed into the sealing sleeve 204 and in place, the bottom end face of the contact head 206 tightly abuts against and longitudinally squeezes against it. The second sealing ring 205 is compressed and undergoes elastic deformation under compression, filling the space between the inner bottom wall of the sealing sleeve 204 and the contact head 206 to form an internal sealing layer. The contact head 206 is located on the outer wall of the sealing sleeve 204 and is threadedly connected to a nut 207. After the nut 207 is tightened, its bottom surface abuts against the top surface of the sealing sleeve 204. The nut 207 uses the thread tightening force to lock the contact head 206 a second time, preventing the contact head 206 from loosening during frequent reciprocating motion, and also providing auxiliary shielding for the top port of the sealing sleeve 204.

[0023] Please refer to Figure 1 and Figure 2Both ends of the body 1 are fixedly connected to the middle of the buckle 202. Correspondingly, both ends of the junction box 4 are fixedly connected to the connecting plate 201. The connecting plate 201 is a plate-shaped component with a fastening function. During assembly, the connecting plate 201 is snapped into the inside of the buckle 202. The mechanical limiting of the connecting plate 201 by the buckle 202 realizes the upper and lower fixation of the body 1 and the junction box 4. A sealing ring 203 is sandwiched between the bottom of the body 1 and the top contact surface of the junction box 4. The sealing ring 203 is arranged around the bottom edge of the body 1. When the buckle 202 is locked, the contact surface of the body 1 and the junction box 4 presses the sealing ring 203, thereby cutting off the path of external liquid to seep into the interior along the shell seam.

[0024] Please refer to Figure 5 To achieve rapid positioning and connection of the pipeline, the quick-installation mechanism 3 includes an outlet pipe 301 fixedly connected to the right side wall of the junction box 4. The outlet pipe 301 extends to the right as a cable channel. A slide rod 303 is fixedly connected axially to the inner wall of the outlet pipe 301. The slide rod 303 is a long strip-shaped protrusion, and multiple slide rods are evenly distributed along the circumference of the inner wall of the outlet pipe 301. A connecting pipe 304 that cooperates with it is used to connect external cables. A groove 306 is opened on the outer wall of the connecting pipe 304. The number and position of 06 correspond one-to-one with the slide rod 303. When the connector 304 is inserted into the outlet pipe 301, the slide rod 303 is embedded and slidably connected to the inside of the slide groove 306. This multi-point slide rail cooperation structure not only guides the connector 304 to be quickly inserted along a straight trajectory, but also uses the abutment between the side wall of the slide rod 303 and the side wall of the slide groove 306 to restrict the relative rotation of the connector 304 inside the outlet pipe 301, preventing the internal wires from being twisted or falling off due to the rotation of the pipe.

[0025] As a preferred embodiment, in order to solve the problem of poor impact resistance caused by rigid connection, a buffer pad 302 is fixedly connected to the inner bottom surface of the outlet pipe 301. The buffer pad 302 is made of highly elastic rubber material. When the connector 304 is fully inserted into the outlet pipe 301 along the slide bar 303, the end of the connector 304 abuts against and squeezes the buffer pad 302. The buffer pad 302 generates a rebound force under pressure, which can transform the hard collision between the outlet pipe 301 and the connector 304 into a flexible contact, effectively absorbing external vibration energy and preventing deformation of the pipe end.

[0026] In a preferred embodiment, to ensure the firmness of the connection, a plurality of limiting rings 305 are fixedly connected to the outer wall of the connector 304. A fixing sleeve 308 is sleeved on the outer wall of the connector 304. The fixing sleeve 308 is located between the end of the outlet pipe 301 and the limiting rings 305. The inner wall of the fixing sleeve 308 is provided with internal threads, and the outer wall of the outlet pipe 301 is provided with external threads. The fixing sleeve 308 is threadedly connected to the outlet pipe 301. The limiting rings 305 are used to prevent the fixing sleeve 308 from disengaging from the connector 304. By rotating the fixing sleeve 308, the fixing sleeve 308 is engaged with the outlet pipe 301, and the connector 304 can be axially locked onto the outlet pipe 301.

[0027] In a preferred embodiment, to achieve waterproofing and dustproofing at the pipe interface, a sealing gasket 307 is sandwiched between the end of the outlet pipe 301 and the side of the limiting ring 305. The sealing gasket 307 is sleeved on the outer wall of the connector pipe 304. When the fixing sleeve 308 is tightened, the fixing sleeve 308 pushes the sealing gasket 307 to move towards the port of the outlet pipe 301 and compresses it. The deformed sealing gasket 307 tightly fills the annular gap between the outlet pipe 301, the connector pipe 304 and the fixing sleeve 308, thereby completely sealing the channel for external dust and moisture to enter the junction box 4.

[0028] Working principle: When assembling the equipment, the operator first uses the buckle 202 on the side of the machine body 1 to fasten the connecting plate 201 on the junction box 4. The locking force of the buckle 202 is used to press the sealing ring 203 between the contact surfaces of the two parts to complete the main body sealing of the housing. Then, the contact head 206 is screwed into the sealing sleeve 204 until the bottom of the contact head 206 presses the sealing ring 205, and the external nut 207 is tightened to complete the double sealing and fixing of the moving parts. When connecting external cables, align the cable-covered conduit 304 with the outlet conduit 301, align the groove 306 on the outer wall of the conduit 304 with the slide rod 303 on the inner wall of the outlet conduit 301, and push the conduit 304 forward. The slide rod 303 slides within the groove 306, acting as a guide, until the end of the conduit 304 contacts and compresses the buffer pad 302. At this point, the buffer pad 302 provides flexible support for the connection. Then, the operator rotates the fixing sleeve 308 on the conduit 304, causing the fixing sleeve 308 to engage with the threaded connection of the outlet conduit 301. As the fixing sleeve 308 tightens, the sealing gasket 307 sandwiched in the middle is squeezed and deformed to fill the gap. At the same time, the cooperation between the slide rod 303 and the groove 306 prevents the conduit 304 from rotating with the fixing sleeve 308, ultimately achieving a high-strength anti-loosening, impact-resistant, and waterproof and dustproof effect for the conduit connection.

Claims

1. High-strength waterproof limit switch, including: The machine body (1), the junction box (4) installed at the bottom of the machine body (1), the sealing mechanism (2) installed on the outside of the machine body (1), and the quick-release mechanism (3) installed on the right end of the junction box (4); The sealing mechanism (2) is characterized in that it includes a sealing sleeve (204) fixedly connected to the top left side of the body (1), a contact head (206) is threadedly connected to the upper middle part of the inner side of the sealing sleeve (204), a sealing ring (205) is fixedly connected to the bottom of the inner wall of the sealing sleeve (204), and the bottom of the contact head (206) contacts and squeezes the sealing ring (205); The quick-installation mechanism (3) includes an outlet tube (301) fixedly connected to the right end of the junction box (4). A buffer pad (302) is fixedly connected to the left end of the outlet tube (301). A slide rod (303) is fixedly connected around the right end of the inner wall of the outlet tube (301). A connector tube (304) is inserted into the right end of the outlet tube (301). A groove (306) is opened around the left end of the outer wall of the connector tube (304). The slide rod (303) is slidably connected inside the groove (306). The left end of the connector tube (304) contacts and presses against the buffer pad (302). A limit ring (305) is fixedly connected to the outer wall of the connector tube (304). A fixing sleeve (308) is rotatably connected between the outer wall of the connector tube (304) and the limit ring (305). The fixing sleeve (308) is threadedly connected to the outlet tube (301).

2. The high-strength waterproof limit switch according to claim 1, characterized in that, A nut (207) is threaded onto the middle of the outer wall of the contact head (206), and the nut (207) abuts against the top of the sealing sleeve (204).

3. The high-strength waterproof limit switch according to claim 1, characterized in that, The outer wall of the wiring conduit (304) is fixedly connected with multiple limiting rings (305) at equal intervals.

4. The high-strength waterproof limit switch according to claim 1, characterized in that, The left side of the limiting ring (305) is provided with a sealing gasket (307) that is sleeved on the outer wall of the connecting pipe (304). The sealing gasket (307) is located between the outlet pipe (301) and the limiting ring (305), and the sealing gasket (307) fills the gap between the outlet pipe (301) and the connecting pipe (304).

5. The high-strength waterproof limit switch according to claim 1, characterized in that, The left and right ends of the body (1) are fixedly connected with buckles (202), and the left and right ends of the junction box (4) are fixedly connected with connecting plates (201). The connecting plates (201) and the buckles (202) engage with each other.

6. The high-strength waterproof limit switch according to claim 5, characterized in that, A sealing ring (203) is installed on the contact surface between the body (1) and the junction box (4).

7. The high-strength waterproof limit switch according to claim 1, characterized in that, The number and position of the slide rods (303) correspond to the slide grooves (306), and the wiring conduit (304) moves axially along the outlet conduit (301) through the cooperation of the slide rods (303) and the slide grooves (306).

8. The high-strength waterproof limit switch according to claim 1, characterized in that, The fixing sleeve (308) is sleeved on the outer wall of the wiring pipe (304), and the fixing sleeve (308) is located between the limiting ring (305) and the outlet pipe (301). The limiting ring (305) is used to restrict the fixing sleeve (308) from detaching from the wiring pipe (304).

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