Coal mine robot disc type charging mechanism with protection function

Abstract

The utility model discloses a coal mine robot disc type charging mechanism with a protection function, which relates to the technical field of charging structures for coal mine robots, and comprises a disc type power generation mechanism and a charger explosion-proof box body, and the disc type power generation mechanism is arranged in the charger explosion-proof box body. The disc-type power generation mechanism comprises a disc-type iron core, a fixed shaft, a winding, an adapter frame and a fixed plate; one side of the disc-type iron core is provided with an adapter frame, and the other side of the disc-type iron core is provided with a power generation side permanent magnet mounting disc; the disc-type iron core and the adapter frame are both mounted on the fixed shaft, and the power generation side permanent magnet mounting disc is mounted on the fixed shaft through a bearing; according to the utility model, the power generation effect in the explosion-proof wall is realized by using the disc-type stator iron core, the underground charging operation of the underground coal mine robot can be realized on the premise of meeting the current standard, the volume of the robot charging cavity can be effectively reduced, the weight of the robot body is reduced, and the cost is reduced. And the endurance mileage and the continuous working time of the robot are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of charging structures for coal mine robots, in particular to a disc-type charging mechanism for coal mine robots with a protective function. Background Art

[0002] Due to restrictions imposed by coal mine safety standards and the underground coal mine environment, coal mining robots cannot operate underground using towed cables. Therefore, most coal mining robots incorporate internal battery systems, which power other drive units and ensure the robot can complete its various pre-set tasks. However, due to the limited energy storage capacity of batteries, coal mining robots typically require charging. Current coal mine safety regulations and explosion-proof standards explicitly prohibit connected charging of batteries underground. Common charging methods for robots, such as using aviation plugs, charging out of the box, and battery replacement, are expressly prohibited underground.

[0003] At present, there are several common charging methods for underground robots: (1) The robot returns to the surface for charging. Every time the robot battery alarm sounds, the on-site personnel will bring the robot to the surface for charging. After charging is completed, the robot will return to the underground to work; (2) The robot is towed by a wire rope, and a small hub motor is installed on the outside of the robot to generate electricity; (3) The robot is towed by a wire rope, and a friction power generation device is integrated on the outside for charging; (4) Wireless charging is used. A wireless charging transmitter is installed at a fixed position, and a wireless charging receiver is installed inside the robot. When the robot battery is too low, it will automatically return to charge; (5) Magnetic coupling charging is used to allow the magnetic field to pass through the shielding layer to realize the coupling and energy transmission of non-coaxial shafts in different spaces. In actual use, a magnetic coupling charging input terminal is installed at a fixed position, a magnetic coupling charging receiver is installed inside the robot, and a permanent magnet generator is installed behind the receiver. When the magnetic coupling charging receiver starts to rotate, it will drive the permanent magnet generator to generate electricity and realize battery charging.

[0004] However, the current charging methods commonly used by underground robots have significant shortcomings, specifically:

[0005] (1) The robot returns to the well to charge. Each time the robot is moved, it not only increases the labor intensity of the on-site workers, but also affects the continuous operation of the robot.

[0006] (2) The form of wire rope traction providing external power can only be applied to track-type robots, and cannot be applied to wheeled robots or other types of robots. In addition, the form of external frictional electricity generation or hub motor power generation cannot be recognized by relevant industry standards;

[0007] (3) The same is true for wireless charging, which has not been recognized by relevant industry standards. There may be metal shavings between the wireless charging plates, which may be heated in the air during charging, posing a risk of explosion. Therefore, this charging method is not open to coal mines. On the other hand, wireless charging requires that the input and output ends are sufficiently close to each other, otherwise the transmission efficiency will be extremely low.

[0008] (4) Magnetic coupling charging is used. During its use, all components are placed inside the explosion-proof cavity. Therefore, this method can meet the requirements of safe and reliable charging of robots in coal mines.

[0009] Currently, there are many components inside the robot body in the magnetic coupling charging system, and there is no charging mechanism specifically developed for this type of charging among the existing components. Currently, only conventional permanent magnet generators can be used to generate electricity. Conventional permanent magnet generators are standardized products, which increases the volume of the robot body and causes the weight to increase, affecting the robot's ultimate endurance. Utility Model Content

[0010] The present utility model aims to address the problems raised in the aforementioned background art by providing a disc-type charging mechanism for a coal mining robot with protective functions. Because the output end of the magnetic coupling charging device is a permanent magnet rotor that generates its own magnetic field, the rotating magnetic field generated by the rotor at the output end of the magnetic coupling charging device can be directly utilized to generate electricity. To further reduce the robot's physical dimensions, the present utility model utilizes a disc-type stator as the power generation component in the magnetic coupling charging device, thereby reducing the size and weight of the robot's power generation unit, reducing the weight of the entire robot, and increasing its range.

[0011] The purpose of the utility model can be achieved through the following technical solutions: a disc charging mechanism for a coal mine robot with a protective function, comprising a disc power generation mechanism and a charger explosion-proof box, the disc power generation mechanism being installed in the charger explosion-proof box, the disc power generation mechanism comprising a disc iron core, a fixed shaft, a winding, an adapter frame and a fixed plate; an adapter frame is installed on one side of the disc iron core, and a power generation side permanent magnet mounting disk is installed on the other side; the disc iron core and the adapter frame are both installed on the fixed shaft, and the power generation side permanent magnet mounting disk is installed on the fixed shaft through a bearing; one end of the fixed shaft is installed on the middle of the inner side wall of the charger explosion-proof box, and the other end of the fixed shaft is installed on the fixed plate, and the upper end and bottom end of the fixed plate are respectively fixed to the inner top wall and bottom wall of the charger explosion-proof box; the power generation side permanent magnet is installed on the power generation side permanent magnet mounting disk, and the winding is installed on the disc iron core.

[0012] As a preferred embodiment of the present invention, the disc core includes stator slots, stator teeth, notches and a stator yoke. The stator yoke is evenly provided with a plurality of stator slots, stator teeth are installed between two adjacent stator slots, and notches are provided on the stator slots.

[0013] As a preferred embodiment of the present invention, a prime mover explosion-proof housing is installed on one side of the charger explosion-proof housing, a prime mover and a reducer are installed inside the prime mover explosion-proof housing, and the prime mover and the reducer are connected via a coupling.

[0014] As a preferred embodiment of the present invention, the output shaft of the reducer is connected to the prime mover side permanent magnet mounting disk via a key, a magnet cover is installed on the prime mover side permanent magnet mounting disk, and several prime mover side permanent magnets are installed inside the prime mover side permanent magnet mounting disk.

[0015] As a preferred embodiment of the present invention, the number of the prime mover side permanent magnets is an even number, and they are arranged alternately in NS order inside the prime mover side permanent magnet mounting disk. The number of the generating side permanent magnets is the same as that of the prime mover side permanent magnets, and they are evenly distributed on the generating side permanent magnet mounting disk and arranged in NS order.

[0016] Compared with the existing technology, the beneficial effects of the present invention are: the present invention uses a disc-type stator core to achieve the power generation effect inside the explosion-proof wall, and can realize the underground charging operation of the coal mine robot under the premise of meeting the current standards, and can effectively reduce the volume of the robot's charging chamber, reduce the weight of the robot body, and increase the robot's cruising range and continuous working time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a cross-sectional view of the overall structure of the device of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the interior of the explosion-proof box of the charger of the present invention;

[0020] Figure 3 This is the front view of the disc core and winding of the utility model;

[0021] Figure 4 This is a schematic diagram of the disc core and winding of the utility model;

[0022] Figure 5 This is the overall structure diagram of the disc-type iron core of the present utility model.

[0023] Reference numerals:

[0024] 1. Prime mover explosion-proof housing; 2. Prime mover; 3. Coupling; 4. Reducer; 6. Bearing; 8. Disc-type generator mechanism; 9. Charger explosion-proof housing; 51. Key; 52. Magnet cover; 53. Prime mover side permanent magnet; 54. Prime mover side permanent magnet mounting plate; 71. Generator side permanent magnet mounting plate; 72. Generator side permanent magnet; 81. Disc-type iron core; 82. Fixed shaft; 83. Winding; 84. Adapter frame; 85. Fixed plate; 811. Stator slots; 812. Stator teeth; 813. Notches; 814. Stator yoke. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] See also Figure 1 As shown, a disc-type charging mechanism of a coal mine robot with a protective function includes a prime mover explosion-proof box 1, a prime mover 2, a coupling 3, a reducer 4, a key 51, a magnet cover 52, a prime mover side permanent magnet 53, a prime mover side permanent magnet mounting plate 54, a bearing 6, a generator side permanent magnet mounting plate 71, a generator side permanent magnet 72, a disc-type power generation mechanism 8 and a charger explosion-proof box 9.

[0027] The prime mover explosion-proof housing 1, prime mover 2, coupling 3, reducer 4, key 51, magnet cover 52, prime mover-side permanent magnet 53, and prime mover-side permanent magnet mounting plate 54 are all mounted on the prime mover side, primarily providing a safe energy source for the charging mechanism. The bearing 6, generator-side permanent magnet mounting plate 71, generator-side permanent magnet 72, disc-type generator mechanism 8, and charger explosion-proof housing 9 are mounted on the generator side, primarily providing a safe charging method for the robot. Energy is transferred between the prime mover and generator sides through magnetic field coupling between the prime mover-side permanent magnet 53 and the generator-side permanent magnet 72. During operation, the prime mover 2 rotates the prime mover-side permanent magnet mounting plate 54, driving the prime mover-side permanent magnet 53 to rotate and generate a rotating magnetic field. This magnetic field coupling then drives the generator-side permanent magnet 72 to follow its rotation.

[0028] The number of the driving side permanent magnets 53 is even, and they are evenly distributed on the driving side permanent magnet mounting plate 54 and arranged in NS sequence.

[0029] See also Figure 2As shown, the charger's explosion-proof housing 9 houses a disc-shaped iron core 81, a fixed shaft 82, windings 83, an adapter frame 84, and a fixing plate 85. These components primarily secure the disc-shaped iron core 81 and the generator-side permanent magnet 72. During operation, the generator-side permanent magnet 72 rotates, generating a rotating magnetic field on its opposite side. This rotating magnetic field is closed by the disc-shaped generator mechanism 8, generating current in the windings within the disc-shaped generator mechanism 8, thereby outputting electrical energy.

[0030] See also Figure 3 and Figure 4 As shown, it includes a disc iron core 81 and a winding 83. These two components are the main power generation units of the disc charging mechanism. After the rear end is connected to the rectifier bridge and the voltage stabilizing circuit, the robot's battery can be directly charged.

[0031] See also Figure 5 As shown, it includes stator slots 811 , stator teeth 812 , notches 813 and a stator yoke 814 .

[0032] In actual application, the number of windings 83 and the number of prime mover side permanent magnets 53 and generator side permanent magnets 72 follow the commonly used permanent magnet motor pole slot coordination, and the number of stator slots 811 and the number of windings 83 also follow the commonly used motor stator winding distribution theory.

[0033] During actual operation, the output energy of the prime mover 2 reaches the prime mover side permanent magnet 53 after passing through the reducer 4, and the mechanical energy is converted into electromagnetic energy by the prime mover side permanent magnet 53, and then passes through the generator side permanent magnet 72 as a transfer, and finally generates electrical energy on the winding 83 and reaches the battery of the robot, realizing safe charging of the robot underground.

[0034] During use, the present invention comprises a flameproof housing 1 for the prime mover, providing an explosion-proof enclosure for the products inside. The prime mover 2 provides power, rotating the prime mover-side permanent magnet mounting plate 54 and generating a rotating magnetic field. The coupling 3 connects the prime mover 2 and the reducer 4, which reduces the speed of the prime mover 2 and increases the output torque. The key 51 connects the output shaft of the reducer 4 to the prime mover-side permanent magnet mounting plate 54, enabling torque transmission. The magnet cover 52 is bolted to the prime mover-side permanent magnet mounting plate 54, closing the magnetic circuit for the prime mover-side permanent magnets 53. The prime mover-side permanent magnets 53, which generate an air gap magnetic field, are mounted on the prime mover-side permanent magnet mounting plate 54 in an even number and arranged in an alternating N-S pattern within the plate. The prime mover-side permanent magnet mounting plate 54 is provided with grooves for securing the prime mover-side permanent magnets 53, and the material used is non-magnetic. The bearing 6 is fixed between the generator-side permanent magnet mounting plate 71 and the disc-type generator mechanism 8, allowing relative rotation between the two. The generator-side permanent magnet mounting plate 71 is used to secure the generator-side permanent magnet 72. It is provided with grooves and made of a non-magnetic material. The generator-side permanent magnet mounting plate 71 is a double-flap assembly structure that is secured with bolts, allowing the generator-side permanent magnet 72 to be directly fixed within it. The number of generator-side permanent magnets 72 is the same as the prime mover-side permanent magnets 53, and they are also arranged in an alternating N-S pattern within the generator-side permanent magnet mounting plate 71. They spatially couple with the prime mover-side permanent magnets 53 through a magnetic field, achieving contactless energy transfer. The disc-type generator mechanism 8 is used to generate electrical energy. The charger explosion-proof housing 9 is flameproof and provides an explosion-proof enclosure for the products inside. The disc-type iron core 81 is provided with fixed grooves for securing the winding 83 and providing a magnetic field circuit. The fixed shaft 82 supports the generator side permanent magnet mounting disk 71 through the bearing 6, so that the generator side permanent magnet mounting disk 71 and the disc core 81 remain relatively parallel and coaxial. The winding 83 is wound inside the disc core 81 to cut the magnetic field to generate current. The adapter frame 84 is used to fix the disc core 81. The fixing plate 85 is used to fix the adapter frame 84 so that the adapter frame 84 is fixed to the explosion-proof box 9 of the charger. A coil is wound inside the stator slot 811. The stator teeth 812 are mainly used to close the magnetic field, reduce the magnetic resistance on the magnetic flux path, and act as a magnetic pole. The slot 813 is used to install the winding 83 into the stator slot 811. After the winding 83 is installed, a special slot wedge is used to seal it. The stator yoke 814 is mainly used to achieve flux closure.

[0035] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A disc-type charging mechanism for a coal mine robot with a protective function, comprising a disc-type power generation mechanism (8) and a charger explosion-proof box (9), wherein the disc-type power generation mechanism (8) is installed in the charger explosion-proof box (9), and is characterized in that: The disc-type power generation mechanism (8) comprises a disc-type iron core (81), a fixed shaft (82), a winding (83), an adapter frame (84) and a fixed plate (85); the adapter frame (84) is installed on one side of the disc-type iron core (81), and the other side is installed on the power generation side permanent magnet mounting plate (71); the disc-type iron core (81) and the adapter frame (84) are both installed on the fixed shaft (82), and the power generation side permanent magnet mounting plate (71) is connected to the fixed shaft (82) by a bearing (6). The fixed shaft (82) is mounted on a fixed shaft (82); one end of the fixed shaft (82) is mounted on the middle of the inner wall of the charger explosion-proof housing (9); the other end of the fixed shaft (82) is mounted on a fixed plate (85); the upper end and the bottom end of the fixed plate (85) are respectively fixed to the inner top wall and the bottom wall of the charger explosion-proof housing (9); the generator side permanent magnet (72) is mounted on the generator side permanent magnet mounting disk (71); and the winding (83) is mounted on the disk core (81).

2. The disc-type charging mechanism of the coal mine robot with protective function according to claim 1 is characterized in that: The disc-type iron core (81) comprises stator slots (811), stator teeth (812), notches (813) and a stator yoke (814). The stator yoke (814) is evenly provided with a plurality of stator slots (811), a stator tooth (812) is installed between two adjacent stator slots (811), and a notch (813) is provided on the stator slots (811).

3. The disc-type charging mechanism of the coal mine robot with protective function according to claim 1 is characterized in that: A prime mover explosion-proof housing (1) is installed on one side of the charger explosion-proof housing (9), a prime mover (2) and a reducer (4) are installed inside the prime mover explosion-proof housing (1), and the prime mover (2) and the reducer (4) are connected in transmission via a coupling (3).

4. The disc-type charging mechanism of the coal mine robot with protective function according to claim 3 is characterized in that: The output shaft of the speed reducer (4) is connected to the prime mover side permanent magnet mounting disk (54) via a key (51); a magnet cover (52) is mounted on the prime mover side permanent magnet mounting disk (54); and a plurality of prime mover side permanent magnets (53) are mounted inside the prime mover side permanent magnet mounting disk (54).

5. The disc-type charging mechanism of the coal mine robot with protective function according to claim 4 is characterized in that: The number of the prime mover side permanent magnets (53) is an even number, and they are arranged alternately in an NS pattern inside the prime mover side permanent magnet mounting disk (54); the number of the power generation side permanent magnets (72) is the same as the number of the prime mover side permanent magnets (53), and they are evenly distributed on the power generation side permanent magnet mounting disk (71) and arranged in an NS pattern.

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