Novel explosion-proof limit switch

Abstract

The utility model discloses a novel explosion-proof limit switch, which relates to the technical field of explosion-proof limit switches and comprises a switch body, one side of the switch body is fixedly connected with a rotating block, the upper portion of the rotating block is rotatably connected with a supporting block, the upper portion of the supporting block is provided with a rocker, one end of the rocker is fixedly connected with a supporting shaft, and the other end of the rocker is fixedly connected with a rotating shaft. Rollers are rotatably connected to the outer sides of the supporting shafts, connecting plates are fixedly connected to one sides of the supporting blocks, movable plates are slidably connected to the outer sides of the connecting plates, and limiting blocks are fixedly connected to the upper portions of the movable plates. Through the arrangement of the movable plate, the limiting block, the fixed block and the movable block, the effect of marking and limiting the position of the rocker is achieved, through the matched arrangement of the movable screw rod and the movable plate, the position of the movable plate can be adjusted in the using process, and therefore the effect of adjusting the marking structure is achieved; the purpose that the replaced swing rod can be conveniently installed back to the original position is achieved.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof limit switch technology, specifically a novel explosion-proof limit switch. Background Technology

[0002] Limit switches, also known as position switches, are a type of commonly used low-current control electrical device. They utilize the impact of moving parts in production machinery to actuate their contacts, thereby connecting or disconnecting control circuits to achieve specific control objectives. Typically, these switches are used to limit the position or travel of mechanical movement, causing the machinery to automatically stop, reverse, change speed, or automatically reciprocate at a certain position or travel distance.

[0003] Currently, existing explosion-proof limit switches typically achieve control by having contacts that come into contact with objects. However, during use, malfunctions in the mechanical components can cause deformation of the lever. After replacement, the roller position is difficult to accurately reset, making it inconvenient to reinstall the replaced lever. Furthermore, the fixed connection position of the limit switch during installation necessitates customizing the connection structure based on the connection location, which is inconvenient and limits the switch's connection position. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a novel explosion-proof limit switch, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: it includes a switch body, a rotating block is fixedly connected to one side of the switch body, a support block is rotatably connected to the upper part of the rotating block, a rocker arm is provided on the upper part of the support block, a support shaft is fixedly connected to one end of the rocker arm, and a roller is rotatably connected to the outer side of the support shaft;

[0008] A connecting plate is fixedly connected to one side of the support block, and a movable plate is slidably connected to the outer side of the connecting plate. A limit block is fixedly connected to the upper part of the movable plate, and the inner side of the limit block contacts the end of the rocker arm. A movable block is fixedly connected to one side of the movable plate, and a fixed block is fixedly connected to the upper part of the movable block. The outer side of the fixed block is inserted into the movable groove of the rocker arm.

[0009] A fixed plate is fixedly connected to the lower part of the switch body. A movable frame is slidably connected to the outer side of the fixed plate. A sliding groove is opened on one side of the movable frame. A slider is slidably connected inside the sliding groove. The upper part of the slider is connected to the pressure plate through a pull rod. The lower part of the pressure plate is in contact with the movable frame.

[0010] Optionally, a wire connecting pipe is provided on the side of the switch body away from the rotating block, and a connecting frame is provided on the outer side of the support block, with the lower part of the connecting frame contacting the rocker arm.

[0011] Optionally, a movable screw is rotatably connected to one side of the connecting plate, and a movable plate and a movable block are threadedly connected to one side of the movable screw. The travel of the movable plate is consistent with the length of the movable groove opened in the middle of the rocker arm.

[0012] Optionally, the interior of the limiting block is closely fitted with the rear end of the rocker arm, the front end of the rocker arm supports the roller, and the lower part of the limiting block contacts the connecting plate.

[0013] Optionally, a guide rail is fixedly connected to one side of the fixed plate, and a movable frame is slidably connected to one side of the guide rail. A through hole is provided in the middle of the pressure plate and the slider.

[0014] Optionally, a limiting rod is fixedly connected to the upper part of the movable frame, and a support bolt is threadedly connected to one side of the limiting rod, with the end of the support bolt contacting the switch body.

[0015] This utility model provides a novel explosion-proof limit switch, which has the following beneficial effects:

[0016] 1. This new type of explosion-proof limit switch, through the setting of a movable plate, a limit block, a fixed block, and a movable block, has the effect of marking and limiting the position of the rocker arm. Through the cooperation of the movable screw and the movable plate, the position of the movable plate can be adjusted during use, thereby playing the role of adjusting the marking structure and making it easy to install the replaced rocker arm back to its original position.

[0017] 2. This new type of explosion-proof limit switch, through the setting of slide groove, slider, movable frame and guide rail, has the effect of adjusting the connection position. Through the cooperation of limiting rod, support bolt and pressure plate, the movable frame and slider can be fixed during use, thereby playing the role of fixing the limit switch to the connection point, achieving the purpose of strong adaptability of the limit switch connection position. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2This is a three-dimensional cross-sectional structural diagram of the present invention;

[0020] Figure 3 This utility model Figure 2 A magnified structural diagram of part A in the middle;

[0021] Figure 4 This is a three-dimensional structural diagram of the fixing plate of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the connecting plate of this utility model;

[0023] Figure 6 This is a schematic diagram of the cross-section of the slider of this utility model.

[0024] In the diagram: 1. Switch body; 2. Movable frame; 3. Wire connecting pipe; 4. Moving screw; 5. Connecting plate; 6. Movable plate; 7. Limiting block; 8. Fixing block; 9. Rocker arm; 10. Connecting frame; 11. Fixing plate; 12. Support shaft; 13. Roller; 14. Movable block; 15. Slider; 16. Pressure plate; 17. Slide groove; 18. Support bolt; 19. Limiting rod; 20. Guide rail; 21. Support block; 22. Rotating block. Detailed Implementation

[0025] 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.

[0026] Example

[0027] Please see Figures 1 to 6 The present invention provides a technical solution including a switch body 1, a rotating block 22 fixedly connected to one side of the switch body 1, a support block 21 rotatably connected to the upper part of the rotating block 22, a rocker arm 9 provided on the upper part of the support block 21, a support shaft 12 fixedly connected to one end of the rocker arm 9, and a roller 13 rotatably connected to the outer side of the support shaft 12.

[0028] Specifically, a torsion spring is provided at the connection between the rotating block 22 and the support block 21, and the switch body 1 is made of cast aluminum alloy shell with electrostatic powder coating on the surface.

[0029] A connecting plate 5 is fixedly connected to one side of the support block 21. A movable plate 6 is slidably connected to the outside of the connecting plate 5. A limiting block 7 is fixedly connected to the upper part of the movable plate 6. The inner side of the limiting block 7 contacts the end of the rocker arm 9. A movable block 14 is fixedly connected to one side of the movable plate 6. A fixing block 8 is fixedly connected to the upper part of the movable block 14. The outer side of the fixing block 8 is inserted into the movable groove of the rocker arm 9.

[0030] A fixed plate 11 is fixedly connected to the lower part of the switch body 1. A movable frame 2 is slidably connected to the outer side of the fixed plate 11. A slide groove 17 is provided on one side of the movable frame 2. A slider 15 is slidably connected inside the slide groove 17. The upper part of the slider 15 is connected to the pressure plate 16 through a pull rod. The lower part of the pressure plate 16 is in contact with the movable frame 2.

[0031] Specifically, the upper part of the movable frame 2 contacts the lower part of the switch body 1, and the slide groove 17 closely fits the slider 15.

[0032] Please see Figures 1 to 2 A wire connecting tube 3 is provided on the side of the switch body 1 away from the rotating block 22, and a connecting frame 10 is provided on the outside of the support block 21. The lower part of the connecting frame 10 contacts the rocker arm 9.

[0033] Specifically, the connecting frame 10 is fixed to the support block 21 by fixing screws.

[0034] Please see Figure 1 , Figure 2 , Figure 5 A movable screw 4 is rotatably connected to one side of the connecting plate 5, and a movable plate 6 and a movable block 14 are threadedly connected to one side of the movable screw 4. The travel of the movable plate 6 is consistent with the length of the movable groove opened in the middle of the rocker arm 9.

[0035] Specifically, the movable screw 4 passes through the movable plate 6 and the movable block 14.

[0036] Please see Figures 1 to 2 The interior of the limiting block 7 fits closely with the rear end of the rocker arm 9, the front end of the rocker arm 9 supports the roller 13, and the lower part of the limiting block 7 contacts the connecting plate 5.

[0037] Specifically, the upper part of the connecting plate 5 supports the rocker arm 9.

[0038] Please see Figure 2 , Figure 4 A guide rail 20 is fixedly connected to one side of the fixed plate 11, and a movable frame 2 is slidably connected to one side of the guide rail 20. A through hole is provided in the middle of the pressure plate 16 and the slider 15.

[0039] Specifically, the guide rail 20 is T-shaped, a pull rod is provided at the lower part of the pressure plate 16, and a support spring is provided between the pull rod of the pressure plate 16 and the slider 15.

[0040] Please see Figures 1 to 2 , Figure 4 A limiting rod 19 is fixedly connected to the upper part of the movable frame 2. A support bolt 18 is threadedly connected to one side of the limiting rod 19. The end of the support bolt 18 contacts the switch body 1.

[0041] Specifically, the limiting rod 19 is located at the end of the movable frame 2, and the support bolt 18 passes through the limiting rod 19 and contacts the switch body 1.

[0042] During use, when installing the rocker arm 9, place the rear end of the rocker arm 9 inside the limiting block 7, insert the fixing block 8 into the middle of the rocker arm 9, and fit the connecting frame 10 on the outside of the rocker arm 9 and the support block 21. Then fix it with the connecting screw to fix the rocker arm 9, so that the roller 13 at the front end of the rocker arm 9 contacts the object. Through the setting of the movable plate 6, limiting block 7, fixing block 8 and movable block 14, the position of the rocker arm 9 is marked and limited. After the rocker arm 9 is installed, rotate the moving screw 4 to drive the movable plate 6 and the fixing block 8 to move. When replacing, remove the rocker arm 9. When installing, install it according to the position of the limiting block 7. Through the cooperation of the moving screw 4 and the movable plate 6, the position of the movable plate 6 can be adjusted during use, thereby playing the role of adjusting the marking structure and achieving the purpose of facilitating the installation of the replaced rocker arm back to its original position.

[0043] Align the limit switch with the connection point, then slide the slider 15 within the groove 17, aligning it with the vertical axis. Next, pull the movable frame 2, using the guide rail 20 for restraint, thus aligning it with the horizontal axis. The arrangement of the groove 17, slider 15, movable frame 2, and guide rail 20 allows for adjustment of the connection position. After adjustment, rotate the support bolt 18 to fix the limiting rod 19, thereby fixing the movable frame 2. Then, insert the connecting bolt into the through hole of the pressure plate 16 and slider 15, connecting and fixing it to the connector. Once the connecting bolt is locked, the pressure plate 16 experiences downward force, increasing the contact area of ​​the connection structure, thus fixing the slider 15. Through the coordinated arrangement of the limiting rod 19, support bolt 18, and pressure plate 16, the movable frame 2 and slider 15 can be fixed during use, effectively fixing the limit switch to the connection point and achieving a strong adaptability of the limit switch connection position.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel explosion-proof limit switch, comprising a switch body (1), characterized in that: A rotating block (22) is fixedly connected to one side of the switch body (1). A support block (21) is rotatably connected to the upper part of the rotating block (22). A rocker arm (9) is provided on the upper part of the support block (21). A support shaft (12) is fixedly connected to one end of the rocker arm (9). A roller (13) is rotatably connected to the outer side of the support shaft (12). A connecting plate (5) is fixedly connected to one side of the support block (21), and a movable plate (6) is slidably connected to the outer side of the connecting plate (5). A limiting block (7) is fixedly connected to the upper part of the movable plate (6), and the inner side of the limiting block (7) contacts the end of the rocker arm (9). A movable block (14) is fixedly connected to one side of the movable plate (6), and a fixed block (8) is fixedly connected to the upper part of the movable block (14). The outer side of the fixed block (8) is inserted into the movable groove of the rocker arm (9). A fixed plate (11) is fixedly connected to the lower part of the switch body (1). A movable frame (2) is slidably connected to the outer side of the fixed plate (11). A sliding groove (17) is provided on one side of the movable frame (2). A slider (15) is slidably connected inside the sliding groove (17). The upper part of the slider (15) is connected to the pressure plate (16) through a pull rod. The lower part of the pressure plate (16) is in contact with the movable frame (2).

2. The novel explosion-proof limit switch according to claim 1, characterized in that: A wire connecting tube (3) is provided on the side of the switch body (1) away from the rotating block (22), and a connecting frame (10) is provided on the outside of the support block (21). The lower part of the connecting frame (10) contacts the rocker arm (9).

3. The novel explosion-proof limit switch according to claim 1, characterized in that: A movable screw (4) is rotatably connected to one side of the connecting plate (5), and a movable plate (6) and a movable block (14) are threadedly connected to one side of the movable screw (4). The travel of the movable plate (6) is consistent with the length of the movable groove opened in the middle of the rocker arm (9).

4. The novel explosion-proof limit switch according to claim 1, characterized in that: The interior of the limiting block (7) fits closely with the rear end of the rocker arm (9), the front end of the rocker arm (9) supports the roller (13), and the lower part of the limiting block (7) contacts the connecting plate (5).

5. A novel explosion-proof limit switch according to claim 1, characterized in that: A guide rail (20) is fixedly connected to one side of the fixed plate (11), and a movable frame (2) is slidably connected to one side of the guide rail (20). A through hole is opened in the middle of the pressure plate (16) and the slider (15).

6. A novel explosion-proof limit switch according to claim 1, characterized in that: A limiting rod (19) is fixedly connected to the upper part of the movable frame (2). A support bolt (18) is threadedly connected to one side of the limiting rod (19). The end of the support bolt (18) contacts the switch body (1).

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