A mine-used explosion-proof travel switch

Abstract

The utility model discloses a kind of mining explosion-proof travel switch, specifically related to travel switch technical field, including travel mechanism, the travel mechanism includes switch main body and the rocker shaft above switch main body.The utility model is matched with the symmetrical clamping plate, clamping block and the ratchet of rocker mechanism in receiving mechanism, combined with pull ring and spring, single-hand pull ring can be released from limiting, complete the quick telescopic adjustment of rocker length, loosen and automatically reset lock, eliminate the tedious operation of traditional tool tension screw, improve installation efficiency and operating safety under mine environment;Meanwhile, the conversion rocker in rocker mechanism rotates with ball head shaft as fulcrum, through the ball body of slider groove of limiting component and by screw compression fixing, can accurately lock the inclination angle of conversion rocker in quarter circle range, make gyro wheel touch high place or non-horizontal motion path, break through the limitation that traditional travel switch can only be installed horizontally, expand application scene and adaptability.

Description

Technical Field

[0001] This utility model relates to the field of limit switch technology, and in particular to a mine explosion-proof limit switch. Background Technology

[0002] Patent CN219892097U discloses a mine-use explosion-proof limit switch, specifically relating to the field of limit switch technology. The switch body includes a switch body with a rocker base at one end and a conduit at the other. A rocker arm is mounted on the top of the rocker base. The switch body is enclosed by a housing, which contains multiple support rings, each fitted over the switch body. Multiple support rods are mounted on the inner wall of the housing. A baffle is located on the side of the housing near the rocker base, and a sealing ring is placed between the outer edge of the baffle and the inner wall of the housing. This invention, through its housing design and the sealing of the end of the housing with a baffle and sealing ring, strengthens the housing during use in mines, preventing damage from external objects and extending the service life of the switch body.

[0003] The inventors have discovered at least the following problems in the prior art:

[0004] Existing explosion-proof single rocker limit switches for mining use allow the length of the rocker arm to be adjusted by tightening or loosening the screws connecting the rocker arm and the rocker arm shaft, thus adapting the limit switch to different installation positions. However, tightening or loosening the screws requires tools, making installation troublesome.

[0005] In addition, the existing single-rocker limit switch can only be parallel to the travel direction of the object being measured. This means that the switch can only be installed next to the object's path during installation. As a result, it cannot be used when facing the movement path of an object at a height, and the rocker cannot reach it, thus limiting its applicable range.

[0006] Therefore, this solution provides a mine-use explosion-proof limit switch to solve the above problems. Utility Model Content

[0007] The purpose of this utility model is to provide a mine explosion-proof limit switch to solve the problems of inconvenience in adjusting the length of the rocker arm and the limited applicability of the rocker arm in the prior art.

[0008] To solve the above-mentioned technical problems, the basic technical solution proposed by this utility model is as follows:

[0009] A mine-use explosion-proof limit switch includes a travel mechanism. The travel mechanism includes a switch body and a rocker shaft above the switch body. A receiving mechanism is provided above the rocker shaft, and a rocker mechanism is provided inside the receiving mechanism. The receiving mechanism includes a bearing plate and two symmetrical snap-fit ​​plates embedded inside the bearing plate. The rocker mechanism includes a rocker plate and a conversion rocker plate inside the rocker plate. A roller is rotatably connected to the top of one end of the conversion rocker plate. A mating plate is provided on both sides of the conversion rocker plate. A sliding groove is opened above the conversion rocker plate. A limit component is provided inside the sliding groove. The limit component includes a limit slider, a pressure plate, and a screw.

[0010] Preferably, the bearing plate has a slot for the rocker plate to slide, one side of the snap-fit ​​plate is fixedly connected with evenly distributed snap-fit ​​blocks, and the other end of the snap-fit ​​plate is fixedly connected with a connecting shaft.

[0011] Preferably, the other end of the connecting shaft is fixedly connected to a pull ring outside the bearing plate, and a spring surrounds the outer periphery of the connecting shaft.

[0012] Preferably, ratchet teeth are fixedly connected to both sides of the rocker plate, and the ratchet teeth engage with the locking block. A conversion groove is provided in the middle of the rocker plate. A ball joint shaft is fixedly connected to the inner wall of one end of the conversion groove, and a support plate is fixedly connected to the inner wall of the other end of the conversion groove. One end of the ball joint shaft is located inside the sliding groove.

[0013] Preferably, the conversion rocker plate has notches on both sides, one side of the docking plate is rotatably connected in the notch, and the other side of the docking plate is fitted above the rocker plate.

[0014] Preferably, one side of the limiting slider fits the outer periphery of the ball head shaft, and the limiting slider is slidably connected in the sliding groove.

[0015] Preferably, the pressure plate is attached to the upper end face of the conversion rocker, the screw passes through the pressure plate, and the screw thread connects to the limiting slider.

[0016] The beneficial effects of this utility model are:

[0017] I. This utility model, through the symmetrical locking plate, locking block, ratchet engagement ring, and spring in the receiving mechanism, allows the user to simply pull the two side rings outward with their fingers to release the locking block's restriction on the ratchet on the rocker arm plate, enabling rapid extension and retraction adjustment of the rocker arm's length. After releasing the ring, the spring automatically resets, causing the locking block to re-engage with the ratchet and complete the locking process. This completely avoids the cumbersome operation of using tools to tighten and loosen screws in traditional methods, improving installation and adjustment efficiency, and making operation more convenient and safe, especially in confined or dangerous environments such as mines.

[0018] II. This utility model, through the set rocker mechanism including the conversion rocker plate, ball head shaft, sliding groove, and limiting components (including limiting slider, pressure plate, and screws), allows the user to loosen the connection between the docking plate and the rocker plate, enabling the conversion rocker plate to rotate at multiple angles around the ball head shaft. By sliding the limiting slider to make its arc-shaped groove tightly fit the ball of the ball head shaft, and tightening the screw to fix the pressure plate, the tilt angle of the conversion rocker plate can be precisely locked. This structure allows the roller at the top to be positioned arbitrarily within a quarter circle formed by the ball head shaft as the center and the length of the conversion rocker plate as the radius, thereby reaching the movement path of objects at high places or in non-horizontal directions. This overcomes the limitation of traditional single rocker limit switches that can only be installed and triggered horizontally, greatly improving the adaptability and application scenario range of the equipment. Attached Figure Description

[0019] Figure 1 This is an overall perspective view of Embodiment 1 of the present utility model;

[0020] Figure 2 This is a schematic diagram of the overall vertical transformation structure of Embodiment 1 of this utility model;

[0021] Figure 3 This is a schematic diagram of the stroke mechanism of Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the receiving mechanism in Embodiment 1 of this utility model;

[0023] Figure 5 This is a schematic diagram showing the disassembled structure of the rocker mechanism according to Embodiment 1 of this utility model;

[0024] Figure 6 This is an embodiment of the present utility model. Figure 5 A schematic diagram of the middle section;

[0025] Figure 7 This is a schematic diagram of the limiting slider in Embodiment 1 of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Travel mechanism; 11. Switch body; 12. Rocker shaft;

[0028] 2. Receiving mechanism; 21. Bearing plate; 22. Slot; 23. Pull ring; 24. Connecting shaft; 25. Snap-fit ​​plate; 26. Snap-fit ​​block; 27. Spring;

[0029] 3. Rocker mechanism; 31. Rocker plate; 32. Ratchet; 33. Conversion groove; 34. Support plate; 35. Ball head shaft; 36. Conversion rocker plate; 361. Sliding groove; 362. Notch groove; 37. Roller; 38. Connecting plate;

[0030] 39. Limiting component; 391. Limiting slider; 392. Pressure plate; 393. Screw. Detailed Implementation

[0031] Please refer to the following. Figures 1 to 7 As shown, the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0032] It should be noted that, in the embodiments of this utility model, the directions shown in the accompanying drawings shall prevail, such as front and back. Figure 1 For the sake of accuracy, the specific details should be as follows: Figure 1 The left side is the front. Figure 1 The right side is the rear; at the same time, as Figure 2 As shown, the horizontal direction is roughly defined as left and right, and the vertical direction is defined as up and down. If a specific orientation changes, the directional indication will also change accordingly.

[0033] This utility model provides a mine explosion-proof limit switch, including a limit mechanism 1. The limit mechanism 1 includes a switch body 11 and a rocker shaft 12 above the switch body 11. A receiving mechanism 2 is provided above the rocker shaft 12, and a rocker mechanism 3 is provided inside the receiving mechanism 2.

[0034] The receiving mechanism 2 includes a bearing plate 21 and two symmetrical snap-fit ​​plates 25 embedded inside the bearing plate 21;

[0035] The rocker mechanism 3 includes a rocker plate 31 and a conversion rocker plate 36 inside the rocker plate 31. A roller 37 is rotatably connected to the top of one end of the conversion rocker plate 36. A docking plate 38 is provided on both sides of the conversion rocker plate 36. A sliding groove 361 is provided on the top of the conversion rocker plate 36. A limit component 39 is provided inside the sliding groove 361. The limit component 39 includes a limit slider 391, a pressure plate 392 and a screw 393.

[0036] The switch body 11 and the rocker shaft 12 constitute the main body of the mine explosion-proof limit switch in the prior art, while the receiving mechanism 2 and the rocker mechanism 3 constitute the rocker part of the mine explosion-proof limit switch.

[0037] In a further embodiment, the support plate 21 has a slot 22 for sliding the rocker plate 31, and a uniformly distributed snap-fit ​​block 26 is fixedly connected to one side of the snap-fit ​​plate 25, and a connecting shaft 24 is fixedly connected to the other end of the snap-fit ​​plate 25.

[0038] In this embodiment, the top end of the rocker shaft 12 passes through the bearing plate 21 and is connected by bolts, so that the receiving mechanism 2 can rotate around the rocker shaft 12; the cross section of the slot 22 is consistent with the side view cross section of the rocker plate 31 and the conversion rocker plate 36; the cooperation between the locking block 26 and the ratchet 32 ​​allows the rocker mechanism 3 to be pulled directly when it is extended, but when it is shortened, two fingers need to be inserted into the pull ring 23 and expanded outward.

[0039] In a further embodiment, the other end of the connecting shaft 24 is fixedly connected to a pull ring 23 outside the bearing plate 21, and a spring 27 surrounds the outer periphery of the connecting shaft 24.

[0040] In this embodiment, the spring 27 is used to keep the snap block 26 on one side of the snap plate 25 engaged with the ratchet 32 ​​and limit its movement.

[0041] In a further embodiment, ratchet teeth 32 are fixedly connected to both sides of the rocker plate 31, and the ratchet teeth 32 cooperate with the locking block 26. A conversion groove 33 is opened in the middle of the rocker plate 31. A ball head shaft 35 is fixedly connected to the inner wall of one end of the conversion groove 33, and a support plate 34 is fixedly connected to the inner wall of the other end of the conversion groove 33. One end of the ball head shaft 35 is located inside the sliding groove 361.

[0042] In this embodiment, the ball head shaft 35 is composed of a ball and a shaft fixed to each other. The ball part is located inside the sliding groove 361, while the shaft part is used to connect the ball and the inner wall of the conversion groove 33. The support plate 34 supports the conversion rocker plate 36 when both the rocker plate 31 and the conversion rocker plate 36 are in a horizontal state.

[0043] In a further embodiment, the conversion rocker plate 36 has notches 362 on both sides, one side of the docking plate 38 is rotatably connected in the notch 362, and the other side of the docking plate 38 is fitted above the rocker plate 31.

[0044] In this embodiment, the upper end of the rocker plate 31 is also provided with a notch that matches the notch groove 362, so that it can be inserted into the docking plate 38 when it is in a horizontal state, thereby making the rocker plate 31 and the conversion rocker plate 36 a single unit.

[0045] In a further embodiment, one side of the limiting slider 391 fits the periphery of the ball head shaft 35, and the limiting slider 391 is slidably connected in the sliding groove 361.

[0046] In this embodiment, the limiting slider 391 has an arc-shaped groove near the ball head of the ball head shaft 35, and a guide roller is located in the middle of the groove. This allows the limiting slider 391 to rotate only in the direction of the roller after it is tightly fitted to the ball head shaft 35 and positioned by the screw 393, thereby limiting the tilt angle of the switching rocker 36.

[0047] In a further embodiment, the pressure plate 392 is attached to the upper end face of the conversion rocker plate 36, and the screw 393 passes through the pressure plate 392 and is threadedly connected to the limiting slider 391.

[0048] In this embodiment, after the screw 393 is tightened, the pressure plate 392 can make the inner end face of the limiting slider 391 and the sliding groove 361 fit tightly together, thereby limiting the position of the limiting slider 391.

[0049] The working principle of this utility model is as follows:

[0050] When the length of the rocker mechanism 3 needs to be shortened after the stroke mechanism 1 is installed, two fingers can be inserted into the inside of the pull ring 23 and expanded outwards. This allows the locking block 26 on one side of the locking plate 25 to disengage from the ratchet 32 ​​through the connecting shaft 24. Then, the roller 37 can be adapted to the movement path of the object by pushing the rocker plate 31. If the length of the rocker mechanism 3 needs to be extended, it can be pulled directly. Therefore, no tools are needed when adjusting the rocker mechanism 3, making it more convenient to use.

[0051] When the object's movement path is at a high position, the connecting plate 38 can be rotated to disengage the conversion rocker 36 from the rocker plate 31, allowing the conversion rocker 36 to rotate around the ball joint shaft 35. After rotation, the position of the limiting slider 391 can be slid to make it fit tightly against the outer periphery of the ball joint shaft 35. Then, by tightening the screw 393, the pressure plate 392 can be tightly fitted against the surface of the conversion rocker 36, thus determining the position of the limiting slider 391. This allows adjustment of the height of the top of the rotating conversion rocker 36, so that the roller 37 can be located on the object's movement path. Since the conversion rocker 36 can rotate, it can be adapted to the object's movement path within a quarter circle formed by the ball joint shaft 35 as the center and the conversion rocker 36 as the radius, thereby improving the applicability and no longer being limited to the contact range on the horizontal plane.

[0052] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A mine-use explosion-proof limit switch, comprising a limit mechanism (1), characterized in that, The travel mechanism (1) includes a switch body (11) and a rocker shaft (12) above the switch body (11). A receiving mechanism (2) is provided above the rocker shaft (12), and a rocker mechanism (3) is provided inside the receiving mechanism (2). The receiving mechanism (2) includes a bearing plate (21) and two symmetrical snap-fit ​​plates (25) embedded inside the bearing plate (21); The rocker mechanism (3) includes a rocker plate (31) and a conversion rocker plate (36) inside the rocker plate (31). A roller (37) is rotatably connected to the top of one end of the conversion rocker plate (36). A docking plate (38) is provided on both sides of the conversion rocker plate (36). A sliding groove (361) is provided on the top of the conversion rocker plate (36). A limit component (39) is provided inside the sliding groove (361). The limit component (39) includes a limit slider (391), a pressure plate (392), and a screw (393).

2. The explosion-proof limit switch for mining as described in claim 1, characterized in that: The bearing plate (21) has a slot (22) for sliding the rocker plate (31), and a uniformly distributed snap-fit ​​block (26) is fixedly connected to one side of the snap-fit ​​plate (25), and a connecting shaft (24) is fixedly connected to the other end of the snap-fit ​​plate (25).

3. A mine explosion-proof limit switch according to claim 2, characterized in that: The other end of the connecting shaft (24) is fixedly connected to a pull ring (23) outside the bearing plate (21), and a spring (27) surrounds the outer periphery of the connecting shaft (24).

4. A mine explosion-proof limit switch according to claim 1, characterized in that: The rocker plate (31) is fixedly connected to both sides with ratchet teeth (32), which engage with the snap-fit ​​block (26). A conversion groove (33) is provided in the middle of the rocker plate (31). A ball head shaft (35) is fixedly connected to the inner wall of one end of the conversion groove (33), and a support plate (34) is fixedly connected to the inner wall of the other end of the conversion groove (33). One end of the ball head shaft (35) is located inside the sliding groove (361).

5. A mine explosion-proof limit switch according to claim 1, characterized in that: The conversion rocker plate (36) has notches (362) on both sides. One side of the docking plate (38) is rotatably connected in the notch (362), and the other side of the docking plate (38) is fitted above the rocker plate (31).

6. A mine explosion-proof limit switch according to claim 1, characterized in that: One side of the limiting slider (391) fits the periphery of the ball head shaft (35), and the limiting slider (391) is slidably connected in the sliding groove (361).

7. A mine explosion-proof limit switch according to claim 1, characterized in that: The pressure plate (392) is attached to the upper end face of the conversion rocker plate (36), and the screw (393) passes through the pressure plate (392). The screw (393) is threadedly connected to the limiting slider (391).

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