A dustproof and waterproof limit switch

Abstract

This utility model relates to the field of limit switch technology and discloses a dustproof and waterproof limit switch, including a housing, a micro switch body disposed inside the housing, a cover plate disposed on the lower surface of the housing, a fixing component disposed on the lower surface of the cover plate, and a sealing component disposed inside the housing; the fixing component includes a mounting base and a mounting block, the side wall of the mounting block is fixedly connected to the lower surface of the cover plate, the mounting base is located below the cover plate, and the side wall of the mounting block is slidably connected to the inside of the mounting base. In this utility model, by aligning the mounting block with the mounting base and inserting it, the limit strip slides along the inside of the mounting base. When the mounting block is inserted into place, the mounting base and the magnetic block inside the mounting block attract each other, making the mounting block and the mounting base firmly connected. Inserting a pin into the mounting base and the limit strip restricts the axial movement of the mounting block, achieving a quick disassembly and assembly effect. The above structure improves the disassembly and assembly efficiency of the equipment.

Description

Technical Field

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

[0002] In modern industrial production and the operation of automated equipment, dustproof and waterproof limit switches are core components for precisely controlling the position of moving mechanical parts and ensuring the safe and stable operation of equipment. They are widely used in complex working environments such as mining, food processing, and marine engineering, which are often dusty, humid, or involve water. Their reliability directly affects the continuity of the production line and the service life of the equipment. Therefore, optimizing the ease of installation and disassembly while ensuring protective performance has become an important research direction in the industry.

[0003] Currently, the mainstream installation methods for dustproof and waterproof limit switches on the market are mainly bolt fastening and slot nesting. For limit switches using bolt fastening, tools such as wrenches are needed to tighten multiple bolts sequentially through the pre-drilled screw holes on the switch housing and the equipment mounting surface, and sealing gaskets or sealant are used to enhance the waterproof and dustproof effect.

[0004] However, traditional installation methods have revealed significant drawbacks in practical applications. Taking bolt tightening as an example, the installation process requires multiple steps, including alignment and calibration, sequential tightening of multiple bolts, and sealing treatment. This process is cumbersome and time-consuming. During equipment inspection or maintenance, the disassembly process requires unscrewing each bolt individually, which not only consumes a lot of time but also easily leads to problems such as stripped threads and deformed gaskets due to frequent disassembly and assembly. Therefore, a dustproof and waterproof limit switch is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a dustproof and waterproof limit switch, which aims to improve the problem that the existing technology requires a lot of time for alignment and tightening operations by bolt fastening, and requires unscrewing each bolt one by one during disassembly, resulting in low equipment maintenance efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dustproof and waterproof limit switch includes a housing, a micro switch body disposed inside the housing, a cover plate disposed on the lower surface of the housing, a fixing component disposed on the lower surface of the cover plate, and a sealing component disposed inside the housing.

[0008] The fixing component includes a mounting base and a mounting block. The side wall of the mounting block is fixedly connected to the lower surface of the cover plate. The mounting base is located below the cover plate. The side wall of the mounting block is slidably connected inside the mounting base. A limit strip is fixedly connected to the side wall of the mounting block. The side wall of the limit strip is slidably connected inside the mounting base. Magnetic blocks are fixedly connected inside both the mounting base and the mounting block. The magnetic blocks attract each other.

[0009] As a further description of the above technical solution:

[0010] The sealing assembly includes a sealing ring, the sidewall of which is slidably connected inside the housing.

[0011] As a further description of the above technical solution:

[0012] The mounting base is internally slidably connected to a pin, and the side wall of the pin is slidably connected inside the limiting strip.

[0013] As a further description of the above technical solution:

[0014] A push rod is rotatably connected inside the outer casing, and a roller is rotatably connected to one end of the push rod.

[0015] As a further description of the above technical solution:

[0016] Both the outer shell and the cover plate have sealing grooves inside, and the sidewall of the sealing ring is slidably connected inside the sealing groove.

[0017] As a further description of the above technical solution:

[0018] A fixed base is fixedly connected inside the outer shell, and a push plate is slidably connected inside the outer shell.

[0019] As a further description of the above technical solution:

[0020] The push plate is located inside the sealing groove, and the side wall of the push plate is in contact with the side wall of the sealing ring.

[0021] As a further description of the above technical solution:

[0022] The housing is equipped with multiple sets of springs, one end of which is fixedly connected to the side wall of the fixed base, and the other end of which is fixedly connected to the side wall of the push plate.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, by aligning the mounting block with the mounting base and inserting it, the limiting strip slides along the inside of the mounting base. When the mounting block is inserted into place, the magnetic block inside the mounting base and the mounting block attract each other, making the mounting block and the mounting base firmly connected. The pin is inserted into the mounting base and the limiting strip to restrict the axial movement of the mounting block, achieving a quick disassembly and assembly effect. This solves the problem that some dustproof and waterproof limit switches are fastened with bolts, which requires a lot of time for alignment and tightening operations, and requires unscrewing each bolt one by one during disassembly, resulting in low equipment maintenance efficiency. The above structure improves the disassembly and assembly efficiency of the equipment.

[0025] 2. In this utility model, when the cover plate and the outer shell are installed and fitted together, the sealing ring is squeezed and fills the gap between the outer shell and the cover plate, preventing dust and moisture from entering the interior of the outer shell. At the same time, under the elastic force of the spring, the push plate is pressed tightly against the side wall of the sealing ring, further enhancing the sealing effect. Even if the sealing ring is slightly worn due to external impact or long-term use, the spring can still push the push plate to compensate for the deformation of the sealing ring and maintain good sealing performance. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a dustproof and waterproof limit switch proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the fixing component of a dustproof and waterproof limit switch proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the internal structure of the housing of a dustproof and waterproof limit switch proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the sealing assembly of a dustproof and waterproof limit switch proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0031] Legend:

[0032] 1. Housing; 2. Microswitch body; 3. Cover plate; 4. Mounting base; 5. Mounting block; 6. Limit bar; 7. Magnetic block; 8. Pin; 9. Push rod; 10. Roller; 11. Sealing ring; 12. Sealing groove; 13. Fixing base; 14. Spring; 15. Push plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3 This utility model provides an embodiment of a dustproof and waterproof limit switch, including a housing 1, inside which a micro switch body 2 is provided. The housing 1 provides physical protection and installation space for the internal micro switch body 2, and has the effect of dustproof and waterproof. It can effectively resist the intrusion of external dust, water vapor, corrosive substances, etc., and ensure the stable operation of internal components. A cover plate 3 is provided on the lower surface of the housing 1. The cover plate 3 is used to close the bottom opening of the housing 1, further enhancing the overall dustproof and waterproof performance. A fixing component is provided on the lower surface of the cover plate 3. A sealing component is provided inside the housing 1. A push rod 9 is rotatably connected inside the housing 1. One end of the push rod 9 is rotatably connected to a roller 10. When an external mechanical component touches the roller 10 and pushes the push rod 9 to move, the contacts of the micro switch body 2 are activated, thereby realizing the control of the circuit.

[0035] The fixing assembly includes a mounting base 4 and a mounting block 5. The side wall of the mounting block 5 is fixedly connected to the lower surface of the cover plate 3. The mounting base 4 is located below the cover plate 3. The side wall of the mounting block 5 is slidably connected inside the mounting base 4. The two work together to perform insertion and removal movements, realizing the rapid positioning and installation of the limit switch. The side wall of the mounting block 5 is fixedly connected to a limit strip 6. The side wall of the limit strip 6 is slidably connected inside the mounting base 4. Magnetic blocks 7 are fixedly connected inside both the mounting base 4 and the mounting block 5. The magnetic blocks 7 attract each other and provide a pre-tightening force when the mounting block 5 is inserted into the mounting base 4, so that the mounting block 5 and the mounting base 4 are firmly connected and prevent loosening. A pin 8 is slidably connected inside the mounting base 4. The side wall of the pin 8 is slidably connected inside the limit strip 6. The pin 8 is used to further limit the axial movement of the mounting block 5, enhance the connection strength and reliability of the fixing assembly, and ensure that the limit switch will not fall off during equipment operation.

[0036] Reference Figures 4-5The sealing assembly includes a sealing ring 11, the sidewall of which is slidably connected to the inside of the outer shell 1. The sealing ring 11 is used to fill the gap between the outer shell 1 and the cover plate 3, and plays a sealing role. It can effectively prevent dust, water vapor and other external impurities from entering the interior of the outer shell 1, achieving a good dustproof and waterproof effect. Both the outer shell 1 and the cover plate 3 have sealing grooves 12 inside. The sidewall of the sealing ring 11 is slidably connected to the inside of the sealing groove 12. The sealing groove 12 is used to provide installation space for the sealing ring 11, and at the same time, it plays a positioning and limiting role for the sealing ring 11, ensuring that the sealing ring 11 maintains the correct position during installation, thereby giving full play to the sealing role. A fixing seat 13 is fixedly connected inside the outer shell 1, and a push plate 15 is slidably connected inside the outer shell 1. The push plate 15 is located inside the sealing groove 12, and the sidewall of the push plate 15 is in contact with the sidewall of the sealing ring 11. Multiple sets of springs 14 are provided inside the outer shell 1. One end of the spring 14 is fixedly connected to the sidewall of the fixing seat 13, and the other end of the spring 14 is fixedly connected to the sidewall of the push plate 15. The spring 14 is used to provide elastic force for the push plate 15. When the spring 14 is in a compressed or stretched state, it can generate a restoring force to push the push plate 15 to move, thereby continuously applying pressure to the sealing ring 11.

[0037] Working principle: When the device is in operation, when the external mechanical parts move and contact the roller 10, the roller 10 rotates around the push rod 9, transmitting mechanical force to the push rod 9. The push rod 9 rotates inside the housing 1, pushing the contacts of the micro switch body 2 to actuate, thereby realizing the connection or disconnection of the circuit and completing the limit control function. During installation, the mounting block 5 is aligned with the mounting base 4 and inserted. The limiting strip 6 on the side wall of the mounting block 5 slides along the inside of the mounting base 4, serving as a guide and preventing the mounting block 5 from rotating. After the mounting block 5 is inserted into place, the mounting base 4 and the magnetic block 7 inside the mounting block 5 attract each other, making the mounting block 5 and the mounting base 4 firmly connected, completing the initial fixation. To further enhance the fixation effect, the pin 8 can be inserted into the mounting base 4 and the limiting strip 6. The axial movement of the mounting block 5 is restricted to ensure that the limit switch does not loosen during operation. When the cover plate 3 is installed and fitted with the outer shell 1, the sealing ring 11 is compressed, filling the gap between the outer shell 1 and the cover plate 3, preventing dust and moisture from entering the interior of the outer shell 1. At the same time, the fixing seat 13, the push plate 15 and the spring 14 inside the outer shell 1 constitute an auxiliary sealing structure. One end of the spring 14 is connected to the fixing seat 13 and the other end is connected to the push plate 15. Under the elastic force of the spring 14, the push plate 15 is pressed tightly against the side wall of the sealing ring 11, further enhancing the sealing effect. Even if the sealing ring 11 is slightly worn due to external impact or long-term use, the spring 14 can still push the push plate 15 to compensate for the deformation of the sealing ring 11 and maintain good sealing performance.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dustproof and waterproof limit switch, comprising a housing (1), characterized in that: The housing (1) is provided with a micro switch body (2) inside, the lower surface of the housing (1) is provided with a cover plate (3), the lower surface of the cover plate (3) is provided with a fixing component, and the housing (1) is provided with a sealing component inside; The fixing component includes a mounting base (4) and a mounting block (5). The side wall of the mounting block (5) is fixedly connected to the lower surface of the cover plate (3). The mounting base (4) is located below the cover plate (3). The side wall of the mounting block (5) is slidably connected inside the mounting base (4). The side wall of the mounting block (5) is fixedly connected to a limiting strip (6). The side wall of the limiting strip (6) is slidably connected inside the mounting base (4). Magnetic blocks (7) are fixedly connected inside both the mounting base (4) and the mounting block (5). The magnetic blocks (7) attract each other.

2. The dustproof and waterproof limit switch according to claim 1, characterized in that: The sealing assembly includes a sealing ring (11), the sidewall of which is slidably connected inside the housing (1).

3. The dustproof and waterproof limit switch according to claim 1, characterized in that: The mounting base (4) is internally slidably connected to a pin (8), and the side wall of the pin (8) is slidably connected to the inside of the limiting strip (6).

4. The dustproof and waterproof limit switch according to claim 1, characterized in that: The outer shell (1) is rotatably connected to a push rod (9), and one end of the push rod (9) is rotatably connected to a roller (10).

5. A dustproof and waterproof limit switch according to claim 2, characterized in that: Both the outer shell (1) and the cover plate (3) have sealing grooves (12) inside, and the side wall of the sealing ring (11) is slidably connected inside the sealing groove (12).

6. A dustproof and waterproof limit switch according to claim 5, characterized in that: The housing (1) is fixedly connected to a fixed seat (13), and the housing (1) is slidably connected to a push plate (15).

7. A dustproof and waterproof limit switch according to claim 6, characterized in that: The push plate (15) is located inside the sealing groove (12), and the side wall of the push plate (15) is in contact with the side wall of the sealing ring (11).

8. A dustproof and waterproof limit switch according to claim 6, characterized in that: The outer casing (1) is provided with multiple sets of springs (14). One end of the spring (14) is fixedly connected to the side wall of the fixed base (13), and the other end of the spring (14) is fixedly connected to the side wall of the push plate (15).

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