Automatic height adjusting device for shearer drum

Abstract

The utility model discloses a kind of automatic height adjustment devices of coal cutter drum, including traction frame, rocker, drum and height adjustment hydraulic cylinder, the front side of the traction frame is provided with two hinged interfaces corresponding with rocker, the rocker is set to the inboard of hinged interface, the outside of the rocker is fixedly installed with two hinged rods hinged in two hinged interfaces, the front side of the traction frame is fixedly installed with the detection assembly of centrally arranged. This kind of automatic height adjustment device of coal cutter drum, between two the electric angle sensor respectively with two hinged rods are connected, the angle change generated by two hinged rods with rocker swing can be monitored in real time, the pitch angle of rocker is adjusted by height adjustment hydraulic cylinder telescopic, to drive drum up and down to adjust height, two electric angle sensors can simultaneously collect angle information and carry out comparative analysis and fusion processing, to improve the accuracy and stability of angle monitoring, to ensure the accurate control to coal cutter drum height.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machine technology, specifically to an automatic height adjustment device for a coal mining machine drum. Background Technology

[0002] The coal mining machine is the core equipment for mechanized coal mining in underground coal mines. It is mainly used to cut and crush coal seams and load coal. The coal is transported to the roadway through a supporting transportation system. The coal mining machine drum is the core working component of the coal mining machine. It consists of end plates, spiral blades, cutting teeth, etc., and is usually mounted on the rocker arm. The existing patent authorization announcement number CN222615330U discloses a rocker arm for a coal mining machine. Through the coordinated arrangement of a support structure, a housing, an electrical control box, and a traction unit, the device can be made more stable and reliable during use. The support structure provides fixed support for the housing, and the electrical control box can control the traction unit to adjust the height of the device for better coal mining, thereby increasing the stability and reliability of the device. When in use, the aforementioned patent controls the hydraulic rod to drive the rocker arm to swing around the hinge point, thereby driving the roller to move and indirectly adjusting the roller height. However, this method is not convenient for height monitoring, has low height adjustment accuracy, and reduces the stability of use. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic height adjustment device for a coal mining machine drum, so as to solve the problems in the above-mentioned background technology, which indirectly adjusts the drum height by controlling the hydraulic rod to drive the rocker arm to swing around the hinge point and thus drive the drum to move. This method is not convenient for height monitoring, has low height adjustment accuracy, and reduces the stability of use.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic height adjustment device for a coal mining machine drum, comprising a traction frame, a rocker arm, a drum, and a height adjustment hydraulic cylinder. The traction frame has two hinge interfaces corresponding to the rocker arm on its front side. The rocker arm is located inside the hinge interfaces. Two hinge rods are fixedly installed on the outside of the rocker arm, hinged within the two hinge interfaces. A detection component is fixedly installed centrally on the front side of the traction frame. The two ends of the height adjustment hydraulic cylinder are respectively movably hinged to the lower inner sides of the traction frame and the rocker arm. The detection component includes a protective shell fixedly installed on the traction frame. The two hinge rods pass through the left and right sides of the protective shell. A locking rail is fixedly installed inside the protective shell. Two mounting brackets symmetrically arranged on the left and right sides are movably locked inside the locking rail. Two conductive angle sensors are fixedly installed inside the two mounting brackets. The two conductive angle sensors are respectively connected to the two hinge rods.

[0005] Preferably, the conductive angle sensor is externally provided with a brush bracket, and the conductive angle sensor is fixedly connected to the hinge rod through the brush bracket.

[0006] Preferably, the two conductive angle sensors are arranged symmetrically on the left and right sides based on the traction frame, and the roller is movably mounted on the end of the rocker arm away from the hinge interface.

[0007] Preferably, both the mounting bracket and the protective shell have through holes on their exteriors.

[0008] Preferably, the top of the card release rail has a card release opening in the center, and a limiting block located between two mounting brackets is movably engaged inside the card release opening. A protective cover is movably hinged to the front side of the protective shell, and a fixing bolt is movably installed on the outside of the protective cover. The fixing bolt is threaded to the top of the protective shell.

[0009] Preferably, the total length of the two mounting brackets and the limiting block is equal to the length of the locking rail, and the size of the locking opening is adapted to the mounting brackets and the limiting block.

[0010] Preferably, the inner side of the protective cover is fixedly connected to a stop plate located above the limiting block.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. By connecting the two conductive angle sensors to the two hinge rods respectively, the angle changes of the two hinge rods as the rocker arm swings can be monitored in real time. The pitch angle of the rocker arm can be adjusted by extending and retracting the hydraulic cylinder, thereby driving the drum to move up and down to adjust the height. The two conductive angle sensors can simultaneously collect angle information and perform comparative analysis and fusion processing to improve the accuracy and stability of angle monitoring, thereby ensuring precise control of the height of the coal mining machine drum. 2. The protective cover can be tightly fixed to the protective shell by fixing bolts for sealing protection. The design of the locking port and the limiting block can limit the lateral displacement of the mounting frame in the locking rail. When it is necessary to inspect and maintain the conductive angle sensor, simply unscrew the fixing bolts to open the protective cover. The limiting block and the mounting frame can be quickly disassembled one after the other. The operation is convenient and can effectively shorten the maintenance time. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the height-adjusting hydraulic cylinder of this utility model; Figure 3 This is an exploded view of the position and structure of the detection component and hinge rod of this utility model; Figure 4 This is a cross-sectional structural diagram of the hinge rod and the conductive angle sensor of this utility model. Figure 5 This is an exploded view of the internal structure of the protective shell of this utility model.

[0013] In the diagram: 1. Traction frame; 2. Rocker arm; 3. Roller; 4. Hinge interface; 5. Hinge rod; 6. Detection component; 61. Protective shell; 62. Card release rail; 63. Mounting bracket; 64. Conductive angle sensor; 65. Brush bracket; 66. Card release port; 67. Limit block; 68. Protective cover; 69. Support plate; 610. Fixing bolt; 7. Height adjustment hydraulic cylinder. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a technical solution: an automatic height adjustment device for a coal mining machine drum, including a traction frame 1, a rocker arm 2, a drum 3, and a height adjustment hydraulic cylinder 7. The traction frame 1 has two hinge interfaces 4 corresponding to the rocker arm 2 on its front side. The rocker arm 2 is located inside the hinge interfaces 4. Two hinge rods 5 are fixedly installed on the outside of the rocker arm 2, hinged within the two hinge interfaces 4. A detection component 6 is fixedly installed on the front side of the traction frame 1, with its center positioned. The two ends of the height adjustment hydraulic cylinder 7 are respectively movably hinged to the lower inner sides of the traction frame 1 and the rocker arm 2. The detection component 6 includes a protective shell 61 fixedly installed on the traction frame 1. The two hinge rods 5 pass through the left and right sides of the protective shell 61 respectively. A locking rail 62 is fixedly installed inside the protective shell 61, and the locking rail 62 movably engages with... There are two symmetrically arranged mounting brackets 63. Two conductive angle sensors 64 are fixedly installed inside the two mounting brackets 63. The two conductive angle sensors 64 are respectively connected to the two hinge rods 5. The two conductive angle sensors 64 can monitor the angle changes of the two hinge rods 5 as the rocker arm 2 swings in real time. The pitch angle of the rocker arm 2 can be adjusted by extending and retracting the lifting hydraulic cylinder 7. The lifting hydraulic cylinder 7 can be a DTS-300 model, which in turn drives the drum 3 to move up and down to adjust the height. The two conductive angle sensors 64 can simultaneously collect angle information and perform comparative analysis and fusion processing. The average value is taken as the final detection result to improve the accuracy and stability of angle monitoring, thereby ensuring precise control of the height of the coal mining machine drum 3.

[0016] The conductive angle sensor 64 is externally equipped with a brush bracket 65. The conductive angle sensor 64 is fixedly connected to the hinge rod 5 through the brush bracket 65. The conductive angle sensor 64 can be model WDD35D. The brush bracket 65 is made of insulating material, which can effectively avoid current interference. It has a connection hole inside that matches the output shaft of the conductive angle sensor 64. The output shaft is fixed to the connection hole by a flat key, ensuring that the output shaft of the conductive angle sensor 64 can be rotated synchronously when the hinge rod 5 swings. The outer wall of the brush bracket 65 has a waist-shaped mounting hole, which is connected to the lug at the end of the hinge rod 5 by bolts to ensure the coaxiality of the sensor and the hinge rod 5 and reduce the angle measurement error caused by installation deviation.

[0017] Two conductive angle sensors 64 are symmetrically arranged on the left and right sides based on the traction frame 1. The roller 3 is movably installed at the end of the rocker arm 2 away from the hinge interface 4. The rocker arm 2 is rotatably connected to the traction frame 1 through the hinge interface 4, so that the rocker arm 2 can flexibly pitch around the hinge interface 4. When the height adjustment hydraulic cylinder 7 extends or retracts, the rocker arm 2 swings with the hinge interface 4 as the fulcrum, thereby changing the working height of the roller 3. The symmetrically arranged conductive angle sensors 64 can monitor the angle changes of the hinge rods 5 on both sides respectively. The symmetrical layout can further improve the synchronization and reliability of angle monitoring and avoid the impact of failure or deviation of a single conductive angle sensor 64 on the overall height control accuracy.

[0018] Both the mounting bracket 63 and the protective shell 61 have through holes on their exteriors. The diameter of the through holes is adapted to the connecting wire. The connecting wire can be led out from inside the protective shell 61 through the through holes and connected to the control terminal of the coal mining machine (not shown in the figure, model can be PLC-S7-1200). A torque sensor (not shown in the figure, model can be TQ-803) can be installed on the rotating shaft of the drum 3 to monitor the load torque on the drum 3 during operation. The sensor is connected to the control terminal through the through holes. The control terminal combines the height data of the drum 3 monitored by the conductive angle sensor 64 with the load information fed back by the torque sensor to comprehensively judge the current geological conditions such as the hardness and thickness of the coal seam, and then dynamically adjusts the extension and retraction of the height adjustment hydraulic cylinder 7 to perform automatic height adjustment control, so that the drum 3 is always kept in the optimal cutting position.

[0019] Please see Figure 1 , Figure 2 and Figure 5The top of the mounting rail 62 has a centrally located mounting opening 66. Inside the mounting opening 66, a limiting block 67 is movably engaged between two mounting brackets 63. A protective cover 68 is movably hinged to the front of the protective shell 61. A fixing bolt 610 is movably mounted on the outside of the protective cover 68. The fixing bolt 610 is threaded to the top of the protective shell 61. The fixing bolt 610 can tightly fix the protective cover 68 to the protective shell 61, forming a closed space to protect the internal components. The design of the mounting opening 66 and the limiting block 67 can limit the lateral displacement of the mounting brackets 63 within the mounting rail 62, ensuring that the two mounting brackets 63 always maintain a preset distance. When it is necessary to inspect and maintain the conductive angle sensor 64, simply unscrew the fixing bolt 610 to open the protective cover 68. The limiting block 67 and the mounting brackets 63 can be quickly disassembled, making the operation convenient and effectively shortening the maintenance time.

[0020] The total length of the two mounting brackets 63 and the limiting block 67 is equal to the length of the mounting rail 62. The size of the mounting opening 66 is adapted to the mounting brackets 63 and the limiting block 67, so that the mounting brackets 63 and the limiting block 67 form a complete linear arrangement structure within the mounting rail 62. This effectively avoids the shaking problem caused by gaps between components, further improving the stability of the overall structure. The compatible dimensional relationship ensures that the mounting brackets 63 and the limiting block 67 can be accurately embedded in the mounting opening 66. While ensuring the lateral limiting effect, it also provides a positioning reference for the longitudinal installation of the mounting brackets 63 within the mounting rail 62, making the installation process more efficient and accurate, reducing the potential impact of assembly errors on the working accuracy of the conductive angle sensor 64, and facilitating disassembly for maintenance.

[0021] The inner side of the protective cover 68 is fixedly connected to the abutment 69 located above the limiting block 67. The lower surface of the abutment 69 is in close contact with the upper surface of the limiting block 67. The closing action of the protective cover 68 can apply downward pressure to the limiting block 67, further enhancing the stability of the limiting block 67 within the locking rail 62.

[0022] Working principle: The traction frame 1 is bolted to the support structure. During use, the height adjustment hydraulic cylinder 7 is controlled to drive the rocker arm 2 and the two hinge rods 5 to rotate inside the hinge interface 4, which in turn drives the roller 3 installed at the other end of the rocker arm 2 to move and adjust the height of the roller 3. When the two hinge rods 5 rotate, the shaft end of the conductive angle sensor 64, which is fixed in the mounting bracket 63 inside the protective shell 61, is connected to the end of the hinge rod 5 located inside the protective shell 61 through the brush bracket 65. When the rocker arm 2 drives the hinge rod 5 to rotate, the shaft end of the conductive angle sensor 64 can be rotated synchronously through the brush bracket 65, resulting in a change in resistance value and thus detecting the angle change. The data is transmitted to the control terminal through the wire. The data collected by the two conductive angle sensors 64 is processed according to the error and coordinated with the precise control of the height adjustment hydraulic cylinder 7 to ensure the precise adjustment of the rotation angle of the rocker arm 2 and the height of the roller 3, thus ensuring the adjustment accuracy. Due to the harsh working environment in coal mines, when maintenance of the conductive angle sensor 64 is required, the fixing bolt 610 is unscrewed and the protective cover 68 is rotated to open, allowing the abutment 69 to rotate and release from the pressure on the limiting block 67. Then, the limiting block 67 can be removed from the slot 66. After disconnecting the connection between the brush bracket 65 and the hinge rod 5, the mounting bracket 63 is slid along the inner side of the slot rail 62 to the slot 66. The mounting bracket 63 can be lifted upwards along the slot 66 to disassemble the conductive angle sensor 64, thus facilitating the disassembly and assembly of the conductive angle sensor 64 and making maintenance work easier. The above is the working process of the entire device. All contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic height adjustment device for a coal mining machine drum, comprising a traction frame (1), a rocker arm (2), a drum (3), and a height adjustment hydraulic cylinder (7), characterized in that: The front side of the traction frame (1) is provided with two hinge interfaces (4) corresponding to the rocker arm (2). The rocker arm (2) is located inside the hinge interface (4). Two hinge rods (5) are fixedly installed on the outside of the rocker arm (2) and hinged to the two hinge interfaces (4). A detection component (6) is fixedly installed in the center on the front side of the traction frame (1). The two ends of the height adjustment hydraulic cylinder (7) are respectively movably hinged to the lower part of the inner side of the traction frame (1) and the rocker arm (2). The detection component (6) includes a protective shell (61) fixedly installed on the traction frame (1), two hinge rods (5) passing through the left and right sides of the protective shell (61) respectively, a locking rail (62) fixedly installed inside the protective shell (61), two mounting brackets (63) symmetrically arranged on the left and right sides are movably locked inside the locking rail (62), two conductive angle sensors (64) are fixedly installed inside the two mounting brackets (63), and the two conductive angle sensors (64) are respectively connected to the two hinge rods (5).

2. The automatic height adjustment device for a coal mining machine drum according to claim 1, characterized in that: The conductive angle sensor (64) is externally provided with a brush bracket (65), and the conductive angle sensor (64) is fixedly connected to the hinge rod (5) through the brush bracket (65).

3. The automatic height adjustment device for a coal mining machine drum according to claim 1, characterized in that: The two conductive angle sensors (64) are arranged symmetrically on the left and right sides based on the traction frame (1), and the roller (3) is movably mounted on the end of the rocker arm (2) away from the hinge interface (4).

4. The automatic height adjustment device for a coal mining machine drum according to claim 1, characterized in that: Both the mounting bracket (63) and the protective shell (61) have through holes on their exteriors.

5. The automatic height adjustment device for a coal mining machine drum according to claim 1, characterized in that: The top of the card slot (62) is provided with a card slot opening (66) in the center. The card slot opening (66) is movably engaged with a limiting block (67) located between two mounting brackets (63). The front side of the protective shell (61) is movably hinged with a protective cover (68). The exterior of the protective cover (68) is movably mounted with a fixing bolt (610). The fixing bolt (610) is threaded to the top of the protective shell (61).

6. The automatic height adjustment device for a coal mining machine drum according to claim 5, characterized in that: The total length of the two mounting brackets (63) and the limiting block (67) is equal to the length of the locking rail (62), and the size of the locking opening (66) is adapted to the mounting brackets (63) and the limiting block (67).

7. The automatic height adjustment device for a coal mining machine drum according to claim 6, characterized in that: The inner side of the protective cover (68) is fixedly connected to a stop plate (69) located above the limiting block (67).

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