A lighting device for coal mining operations
By introducing a worm gear mechanism into the lighting device for coal mining operations, the angle of the explosion-proof lamp can be adjusted, solving the problem that fixed-angle lighting equipment cannot adapt to dynamic lighting needs, and improving the safety and efficiency of coal mining operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANKUANG ENERGY GRP CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-05-29
AI Technical Summary
In existing coal mining operations, the lighting angle of the roadway lighting equipment is fixed, which cannot adapt to the dynamic lighting needs of different areas and work scenarios, resulting in insufficient or excessive lighting in some areas, affecting the visibility and safety of workers.
The rotation of the rotating frame is achieved by using a worm gear mechanism, which drives the explosion-proof lamp to change the lighting angle. The smooth transmission and self-locking of the worm gear mechanism ensure that the explosion-proof lamp is stably maintained at the adjusted angle.
It enables flexible adjustment of the lighting angle to meet the lighting needs under different working conditions, thereby improving the safety and efficiency of coal mining operations.
Smart Images
Figure CN224302003U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mining operation technology, and in particular to a coal mining operation lighting device. Background Technology
[0002] Lighting in coal mining tunnels is crucial, directly impacting worker safety and operational efficiency. Currently, most lighting equipment used in tunnels is fixedly installed on the roof and sidewalls, with fixed and non-adjustable lighting angles.
[0003] However, in actual coal mining operations, the lighting requirements for different areas within the roadway change as the working face advances and the work procedures change. Fixed-angle lighting equipment cannot meet these dynamic lighting needs, often resulting in some working areas being underlit while others are overlit. This not only affects the visibility of workers and increases operational risks but may also reduce the efficiency of coal mining operations. Utility Model Content
[0004] The purpose of this utility model is to provide a lighting device for coal mining operations. This device can flexibly adjust the lighting angle to meet the lighting needs of different areas and different work scenarios in coal mining operations, thereby improving the safety and efficiency of coal mining operations.
[0005] To achieve the above objectives, this utility model provides a coal mining operation lighting device, including a fixed frame, a rotating frame rotatably mounted on the fixed frame, and an explosion-proof lamp fixedly mounted on the rotating frame; the fixed frame is fixed to the top side wall of the roadway; a worm gear mechanism is installed between the rotating shaft of the rotating frame and the fixed frame; the worm gear mechanism includes a worm housing fixed on the fixed frame, a worm wheel and a worm rotatably mounted inside the worm housing; the worm wheel and the worm mesh with each other; the axle of the worm wheel is fixedly connected to the rotating shaft of the rotating frame; the worm extends downwards, and its bottom extends downwards through the worm housing.
[0006] By adopting the above structure and setting up a worm gear mechanism, the rotation of the rotating frame is realized, which in turn drives the explosion-proof lamp to change the lighting angle, meeting the lighting needs under different working conditions. The worm gear mechanism has the characteristics of smooth transmission and good self-locking, which can keep the explosion-proof lamp stably maintained at the adjusted angle.
[0007] Preferably, a rotating rod is detachably mounted on the bottom of the worm gear. This detachable mounting of the rotating rod allows for easy adjustment of the angle when needed, and its removal when adjustment is not required, preventing the rotating rod from occupying space in the tunnel or being damaged by impact.
[0008] Preferably, the worm gear has a slot at its bottom; the rotating rod has a plug at its top that can be inserted into the slot; when the plug is inserted into the slot, rotating the rotating rod will cause the worm gear to rotate synchronously. The slot and plug provide circumferential limiting for the rotating rod and the worm gear, enabling the rotating rod to drive the worm gear to rotate synchronously. The structure is simple and easy to operate, facilitating the operator to adjust the angle of the explosion-proof lamp.
[0009] Preferably, a horn cover is provided on the volute housing at the point where the worm protrudes, and the worm is positioned at the minimum diameter of the horn cover. The horn cover not only prevents dust, debris, and other contaminants from entering the volute housing and protecting the normal operation of the worm gear mechanism, but also guides the insertion of the rotating rod, ensuring its rapid engagement with the worm.
[0010] Preferably, the horn cover includes a straight section fixed to the volute and a tapered section fixed to the bottom of the straight section; the lowest point of the worm is higher than the lowest point inside the straight section. The design of the straight section and the tapered section further optimizes the dustproof and guiding functions of the horn cover, ensuring that the rotating rod can be smoothly inserted and removed.
[0011] Preferably, a support plate is fixed to one side of the fixed frame; the volute is fixedly mounted on the support plate, and a slotted hole is formed on the support plate along the direction of the rotation axis, with the volute fixedly mounted in the slotted hole. The support plate provides a stable mounting base for the volute, and the slotted hole allows for fine adjustment of the volute's mounting position along the direction of the rotation axis, facilitating the connection and fixation between the worm and the rotation axis of the rotating frame, thus improving the installation accuracy and stability of the device.
[0012] Preferably, reinforcing ribs are provided at the corners of the support plate. These ribs enhance the structural strength of the support plate, ensuring the stability of the entire device and preventing deformation or damage to the support plate during long-term use.
[0013] Preferably, the rotating frame includes an outer frame and an inner frame; heat dissipation fins are provided between the outer frame and the inner frame; heat dissipation channels are formed between adjacent heat dissipation fins; mounting holes are provided on the inner frame, and the explosion-proof lamp is fixedly mounted on the inner frame. The heat generated by the explosion-proof lamp during operation can be transferred to the heat dissipation fins through the inner frame, and then dissipated into the surrounding environment through the heat dissipation channels, thereby achieving a good heat dissipation effect and ensuring the normal operation and service life of the explosion-proof lamp.
[0014] After adopting the above technical solution, the beneficial effects of this utility model are:
[0015] This utility model relates to a coal mining lighting device that solves the technical problem in existing coal mining lighting devices where the illumination angle is fixed after installation and cannot be adjusted for different working conditions. This utility model utilizes a worm gear mechanism to achieve the rotation of the rotating frame, thereby driving the explosion-proof lamp to change the illumination angle and meet the lighting needs under different working conditions. The worm gear mechanism features smooth transmission and good self-locking properties, enabling the explosion-proof lamp to stably maintain the adjusted angle. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a coal mining operation lighting device according to this utility model;
[0017] Figure 2 This is a schematic diagram of the installation structure of this utility model;
[0018] Figure 3 This is a schematic diagram of a worm gear mechanism.
[0019] Figure 4 yes Figure 3 Internal structure diagram;
[0020] Figure 5 yes Figure 3 A bottom view;
[0021] Figure 6 This is a structural diagram of the fixing frame;
[0022] Figure 7 yes Figure 6 A magnified view of part A in the image.
[0023] In the diagram, 1. Fixed frame, 11. Mounting plate, 12. Support plate, 121. Reinforcing rib, 2. Rotating frame, 21. Outer frame, 22. Inner frame, 3. Explosion-proof light, 4. Worm gear mechanism, 41. Worm housing, 411. Fixed plate, 412. Horn cover, 42. Worm gear, 43. Worm, 431. Slot, 44. Rotating rod. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings.
[0025] The orientations mentioned in this specification are based on the orientation of the coal mining operation lighting device of this utility model during normal operation, and do not limit its orientation during storage and transportation. They only represent relative positional relationships and do not represent absolute positional relationships.
[0026] like Figure 1 and Figure 2As shown, a coal mining lighting device includes a fixed frame 1, a rotating frame 2 rotatably mounted on the fixed frame 1, and an explosion-proof lamp 3 fixedly mounted on the rotating frame 2. The fixed frame 1 is fixed to the top sidewall of the roadway by bolts or other connecting parts. In this embodiment, mounting plates 11 are respectively provided at the top and bottom of the fixed frame 1. The mounting plates 11 are provided with mounting holes, which are strip-shaped holes. By setting bolts between the roadway sidewall and the mounting holes, the mounting plates 11 are fixed to the top sidewall of the roadway, thus providing support for the entire device.
[0027] The fixed frame 1 has rotating holes on both sides. The rotating shaft of the rotating frame 2 passes through the rotating holes and is rotatably mounted on the fixed frame 1. A deep groove ball bearing (model 6204-ZZ) is installed in the rotating hole. The rotating shaft of the rotating frame 2 has an interference fit with the inner ring of the bearing (fit tolerance H7 / k6), and the outer ring of the bearing has a transition fit with the rotating hole (fit tolerance H7 / js6). Dust covers are installed at both ends of the bearing to prevent dust from the tunnel from entering the bearing. Double fluororubber O-rings are also installed at the joint between the rotating shaft of the rotating frame 2 and the fixed frame 1 to prevent dust and moisture intrusion. The explosion-proof light 3 is fixedly mounted on the rotating frame 2 with screws, etc., and changes its lighting direction as the rotating frame 2 rotates. The explosion-proof light 3 can be round, square, or other shapes; different models of explosion-proof lights can be installed by setting different holes on the rotating frame 2.
[0028] like Figure 3 , Figure 4 and Figure 5 As shown, a worm gear mechanism 4 is installed between the rotating shaft of the rotating frame 2 and the fixed frame 1. This mechanism is the core component for adjusting the angle of the rotating frame 2. The worm gear mechanism 4 includes a worm housing 41, a worm wheel 42, and a worm 43.
[0029] like Figure 6 and Figure 7As shown, the volute 41 is fixed to the mounting bracket 1. The fixing method is as follows: a fixing plate 411 with through holes is provided at the bottom of the volute 41. A support plate 12 is fixed to one side of the mounting bracket 1; the volute 41 is fixedly mounted on the support plate 12, which provides a stable mounting base for the volute 41. The support plate 12 is connected to the mounting bracket 1 by a fillet weld with a weld leg height of 5mm. A slotted hole is provided on the support plate 12 along the direction of the rotation axis, and the volute 41 is fixedly mounted in the slotted hole using bolts or similar means. The slotted hole allows for fine adjustment of the volute 41's mounting position along the rotation axis, facilitating the connection and fixation between the worm 43 and the rotation axis of the rotating frame 2. Reinforcing ribs 121 are provided at the corners of the support plate 12, enhancing its structural strength and ensuring the stability of the entire device. The welding of the reinforcing rib 121 to the support plate 12 and the fixing frame 1 is a continuous fillet weld with a weld reinforcement height of ≤1mm, ensuring that the load-bearing capacity of the support plate 12 meets the stress requirements of the worm gear mechanism 4 (maximum load-bearing capacity ≥500N).
[0030] The worm gear 42 and worm 43 are rotatably mounted inside the volute housing 41, and are meshed with each other. The module of the worm gear mechanism 4 is 2-4mm, and the lead angle of the worm 43 is less than the equivalent friction angle (usually ≤3.5°) to ensure self-locking function. The axle of the worm gear 42 is fixedly connected to the shaft of the rotating frame 2. The worm gear 42 and the shaft of the rotating frame 2 are connected by a flat key. The keyway depth is 1 / 4-1 / 3 of the shaft diameter, and the key width and keyway tolerance fit is H9 / h9 to ensure transmission reliability. When the worm gear 42 rotates, it can drive the rotating frame 2 to rotate synchronously. The worm 43 extends downwards, its direction is approximately vertical (the angle with the vertical direction is ≤10°), and its bottom extends downwards through the volute housing 41, making it easy for the operator to rotate.
[0031] The volute 41 is made of HT250 gray cast iron, with an explosion-proof joint surface width ≥25mm and a gap ≤0.2mm, which meets the requirements of GB3836.2-2010 "Explosive Atmospheres - Part 2: Explosion-proof Enclosures 'd'".
[0032] like Figure 2 and Figure 5As shown, to facilitate the operator's rotation of the worm gear 43, a rotating rod 44 is detachably and fixedly installed at the bottom of the worm gear 43. Specifically, a slot 431 is provided at the bottom of the worm gear 43, and a plug that matches the slot 431 is provided at the top of the rotating rod 44. The slot 431 and the plug have a non-circular cross-section (such as rectangular or hexagonal), which is cross-shaped in this embodiment. When the plug is inserted into the slot 431, both are circumferentially limited. Rotating the rotating rod 44 can drive the worm gear 43 to rotate synchronously, which in turn drives the rotating frame 2 and the explosion-proof lamp 3 to rotate through the worm wheel 42, thereby adjusting the lighting angle. After adjustment, the rotating rod 44 can be pulled down and removed from the worm gear 43. This mechanism allows the operator to adjust the angle of the explosion-proof lamp 3 without having to climb to a high place. The power cord of the explosion-proof lamp 3 is connected to the main power cord through a slack cable to avoid power cord interference when the explosion-proof lamp 3 rotates.
[0033] A horn cover 412 is installed on the volute 41 at the point where the worm 43 exits. The horn cover 412 includes a straight section fixed to the volute 41 and a tapered section fixed to the bottom of the straight section. The worm 43 is located at the minimum diameter of the horn cover 412, and the lowest point of the worm 43 is higher than the lowest point inside the straight section. That is, when the rotating rod 44 and the worm 43 are mated inside the straight section, the straight section can limit the rotation of the rotating rod 44. The radial clearance between the worm 43 and the straight section of the horn cover 412 is 1-2 mm, which avoids interference during rotation and reduces the path of dust entering the volute through the narrowing structure of the tapered section. The inner wall of the horn cover 412 is coated with a polytetrafluoroethylene coating (50 μm thick) to reduce the probability of dust adhesion. This design not only prevents dust and debris in the tunnel from entering the interior of the volute 41, but also guides the insertion of the rotating rod 44, ensuring its rapid mating with the worm 43.
[0034] Furthermore, the rotating frame 2 includes an outer frame 21 and an inner frame 22; heat dissipation fins are welded between the outer frame 21 and the inner frame 22; heat dissipation channels are formed between adjacent heat dissipation fins; mounting holes are provided on the inner frame 22, and the explosion-proof lamp 3 is fixedly mounted on the inner frame 22. The heat generated by the explosion-proof lamp 3 during operation can be transferred to the heat dissipation fins through the inner frame 22, and then dissipated into the surrounding environment through the heat dissipation channels, thereby achieving a good heat dissipation effect and ensuring the normal operation and service life of the explosion-proof lamp 3.
[0035] Durability tests were conducted on the worm gear mechanism 4. After 1000 hours of continuous operation in a dusty environment in a coal mine roadway, the increase in meshing clearance was ≤0.05mm, and the self-locking function did not fail.
[0036] This invention utilizes a worm gear mechanism 4 to rotate the rotating frame 2, thereby changing the illumination angle of the explosion-proof lamp 3. The worm gear mechanism 4 features smooth transmission and good self-locking, ensuring the explosion-proof lamp 3 remains stably at the adjusted angle, meeting illumination needs under different operating conditions. A rotating rod 44 is detachably mounted at the bottom of the worm 43, facilitating angle adjustment when needed and allowing for removal when not in use, preventing the rotating rod 44 from occupying space in the tunnel or being damaged by impact.
[0037] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.
Claims
1. A lighting device for coal mining operations, characterized in that: It includes a fixed frame, a rotating frame rotatably mounted on the fixed frame, and an explosion-proof light fixedly mounted on the rotating frame; The fixing frame is fixed to the top side wall of the tunnel; A worm gear mechanism is installed between the rotating shaft of the rotating frame and the fixed frame; the worm gear mechanism includes a worm housing fixed on the fixed frame, a worm wheel and a worm rotatably installed in the worm housing; the worm wheel and the worm mesh with each other; the axle of the worm wheel is fixedly connected to the rotating shaft of the rotating frame; the worm extends downward and its bottom extends downward through the worm housing.
2. The coal mining lighting device according to claim 1, characterized in that: A rotating rod is detachably mounted on the bottom of the worm gear.
3. A coal mining lighting device according to claim 2, characterized in that: The worm gear has a slot at its bottom; the rotating rod has a plug at its top that can be inserted into the slot; when the plug is inserted into the slot, rotating the rotating rod will cause the worm gear to rotate synchronously.
4. A coal mining lighting device according to claim 3, characterized in that: A horn cover is provided on the volute at the point where the worm protrudes, and the worm is located at the minimum diameter of the horn cover.
5. A coal mining lighting device according to claim 4, characterized in that: The horn cover includes a straight section fixed to the volute and a tapered section fixed to the bottom of the straight section; the lowest position of the worm is higher than the lowest position inside the straight section.
6. A coal mining lighting device according to claim 1, characterized in that: A support plate is fixed to one side of the fixing frame; the volute is fixedly installed on the support plate, and a strip hole is opened on the support plate along the direction of the rotation axis, and the volute is fixedly installed in the strip hole.
7. A coal mining lighting device according to claim 6, characterized in that: The support plate is equipped with reinforcing ribs at the corners.
8. A coal mining lighting device according to claim 1, characterized in that: The rotating frame includes an outer frame and an inner frame; heat dissipation fins are provided between the outer frame and the inner frame; heat dissipation channels are formed between adjacent heat dissipation fins; mounting holes are provided on the inner frame, and the explosion-proof light is fixedly installed on the inner frame.