982results about "Cutting machines" patented technology

In one aspect of the present invention, a drill string has a drill bit with a body intermediate a shank and a working face. The working face has a plurality of blades converging at a center of the working surface and diverging towards a gauge of the working face. At least one blade has a cutting element with a carbide substrate bonded to a diamond working end with a pointed geometry. The diamond working end also has a central axis which intersects an apex of the pointed geometry. The axis is oriented between a 25 and 85 degree positive rake angle.

The invention discloses an efficient thin seam coaling roller for a coal mining machine and a using method, and relates to the field of coal mining equipment. A thin seam efficient coaling roller for a coal mining machine comprises a coal mining spiral roller which is fixedly installed at the power output end of a driving rocker arm of the coal mining machine through a fixing bolt; the mounting cover is fixedly mounted at the position, close to the coal mining spiral drum, of the coal mining machine driving rocker arm; while the coal mining spiral drum rotates to mine coal, water spraying at the rocker arm of the coal mining machine, water spraying at the cutting tooth seat and mist curtains sprayed by the wide-angle fan-shaped atomizing nozzles work cooperatively, the dust falling effect is enhanced, a water mist cover is rapidly formed under the assistance of the mounting cover, and the water mist cover can effectively isolate coal dust inside, so that the dust falling effect is improved. And the coal dust diffusion is greatly reduced, the body health of miners is guaranteed, the occupational health risk is reduced, the abrasion of the coal dust to equipment is reduced, the service life of the equipment is prolonged, the maintenance frequency and cost of the equipment are reduced, and the comprehensive benefits of coal mining operation are improved.

The invention provides a control method and device, a coal mining machine, a readable storage medium and a chip. The method comprises the following steps: acquiring a rated load of a cutting motor and target cutting specific energy consumption corresponding to the rated load; determining a load interval corresponding to the rated load; acquiring an actual load value of the cutting motor; under the condition that the actual load value is out of the load interval, the target traction speed is determined according to the running rotating speed of the roller and the target cutting specific energy consumption; and adjusting the moving speed of the traction part to the target traction speed. By means of the scheme, accurate matching of the cutting rotating speed and the traction speed can be achieved.

A two-track bucket wheel loader comprising a bucket wheel loader (1), wherein a boom conveyor (2) is fixedly mounted at one end of the bucket wheel loader (1), symmetrically movable connecting arms (16) are attached inside the boom conveyor (2), a bucket (3) is fixedly connected to the ends of the connecting arms (16), a support platform (8) is fixedly connected to the lower end of the bucket (3), support frames (5) are fixedly connected to both ends of the support platform (8), track wheels (4) are fixedly mounted on both sides of the lower ends of the support frames (5), a belt conveyor (7) is fixedly mounted on both sides of the lower end of the support platform (8), a scraper blade (6) is fixedly mounted at the lower end of the support platform (8), and a belt scale (9) is fixedly mounted inside the belt conveyor (7).

The vertical feeding coal mining machine comprises a rack, a traction part and a cutting assembly, the traction part is connected with the rack so as to be used for dragging the rack to move, the cutting assembly comprises a roller body and cutting teeth, the roller body comprises a cylinder body, an end disc and an end cover, the end disc is arranged on the cylinder body, and the cutting teeth are arranged on the end disc. The end disc is arranged on the outer circumferential wall of the roller body in a sleeving mode, the end disc and the first end of the roller body are arranged in a flush mode, the end cover is connected with the inner circumferential wall of the roller body, a groove is defined between the end cover and the roller body, the multiple cutting teeth are arranged in the circumferential direction of the center line of the roller body at intervals, and the cutting teeth are arranged in the groove. One part of the plurality of cutting teeth is connected with the end disc, and the other part of the plurality of cutting teeth is connected with the end cover. According to the vertical feeding coal mining machine, the arrangement positions of the cutting picks are optimized, the possibility of abrasion of the cutting picks is reduced, and the cutting efficiency is improved.

The invention discloses comprehensive rock drift rapid tunneling equipment and a using method thereof.According to the tunneling equipment, a drilling and anchoring integrated multifunctional drilling machine is arranged on one side of a cantilever type tunneling machine body, and a temporary supporting mechanism is arranged above an oscillation cutting part; a deep hole is formed in a to-be-crushed rock by utilizing the multifunctional drilling machine, the deep hole is further expanded and cracked by utilizing the pulsating fracturing system, the strength of a rock mass is weakened, then the rock mass is milled by adopting the oscillating cutting part, and finally, the rock mass is anchored and protected by utilizing the multifunctional drilling machine and the temporary supporting device, so that a guarantee is provided for an operation environment. According to the equipment and the technology, a traditional roadway tunneling procedure is simplified into a continuous procedure, the tunneling efficiency of roadway rock mass is greatly improved, and meanwhile the cost is saved.

An integral frame-type machine body structure of a coal mining machine, and an integral frame-type intelligent coal mining machine. A structure in which an integral frame-type framework is welded to articulated frames is adopted, and the frame-type framework is configured to be of a transverse drawer-type structure, thereby achieving high interchangeability. The articulated frames are symmetrically distributed on a left side and a right side of the frame-type framework and are welded and connected to the frame-type framework; and a top plate (16) and a bottom plate (14) are fixedly arranged at an upper part and a lower part of the frame-type framework, respectively, external traction transverse plates (9) are fixedly arranged on the left side and the right side of the frame-type framework, and several intermediate vertical plates are fixedly arranged between the top plate (16) and the bottom plate (14), which are located an upper side and a lower side of the frame-type framework, to divide same, so as to obtain a plurality of cavities. The modularization rate of the coal mining machine is improved, thereby improving the interchangeability, facilitating underground maintenance and overhaul, and enhancing the matching adaptability; in addition, the force-bearing condition of the coal mining machine during the working process is improved, and the reliability of a transmission system of the coal mining machine is enhanced.

The double-coal-machine mining method comprises the following steps that S1, coal is cut at a first end through a first notch machine to form a first end notch, and coal is cut in the middle of a working face through a middle notch machine to form a second middle notch; s2, the first coal mining machine is controlled to enter the first end notch, and the second coal mining machine is controlled to move from the second end to the first end so as to enter the second middle notch; and S3, the first coal cutter and the second coal cutter both cut coal in the direction from the first end to the second end. According to the double-coal-machine mining method provided by the embodiment of the invention, the coal mining machine can enter the coal wall for normal mining without beveling feed, the process is simpler, and the coal cutting speed is higher, so that the mining efficiency and the propelling speed of a working face can be improved.

The invention discloses a high-pressure jet flow intelligent mining self-adaptive monitoring control system which comprises a jet flow rock breaking dynamic monitoring module, a rock mass analysis and data processing module, a neural network deep learning module and a mining machine controller. The jet flow rock breaking dynamic monitoring module is used for obtaining jet flow parameters, calculating jet flow axial reverse thrust, obtaining the three-dimensional shape of a mining face and obtaining cutting and crack shapes. Wherein the three-dimensional shape of the mining face at least comprises cutting depth information; the rock mass analysis and data processing module is used for acquiring three-dimensional coordinates of the mining machine in a working environment, calculating rock mass confining pressure and acquiring rock mass characteristics; the neural network deep learning module establishes a jet cutting process parameter and mining process parameter intelligent model; the mining machine controller is used for generating a mining machine control instruction. According to the invention, the high-pressure jet mining equipment can be safely and efficiently controlled to carry out self-adaptive cutting on the ore / rock mass.

The invention provides a hard rock metal mine microwave and mechanical combined tunneling device and method.The hard rock metal mine microwave and mechanical combined tunneling device comprises a dynamic microwave radiation system and a static microwave radiation system, and the dynamic microwave radiation system comprises a first microwave generator, a first waveguide and a first microwave radiator; the first microwave generator, the first waveguide and the first microwave radiator are connected in sequence; the static microwave radiation system comprises a second microwave generator, a second waveguide and a second microwave radiator, and the second microwave generator, the second waveguide and the second microwave radiator are connected in sequence; the dynamic microwave radiation system and the static microwave radiation system are arranged on the tunneling device body. The dynamic microwave radiation system and the static microwave radiation system are arranged on the tunneling device body, so that the rock surface is fully fractured under the action of microwave radiation, and the hard rock cutting efficiency is improved.

The invention discloses a hard rock cutting pick with a double-clamp-spring structure, and belongs to the technical field of cutting picks. A hard rock cutting pick with a double-clamp-spring structure comprises a cutting pick body, the cutting pick body comprises a pick handle and a pick head which are detachably connected, a protruding block protruding outwards is formed on the bottom wall, corresponding to the pick handle, of the pick head, and a plurality of inserting parts extending outwards are formed on the outer wall of the protruding block at equal intervals; a butt joint groove matched with the bottom wall of the tooth head is formed in the top wall of the tooth handle, inserting grooves which are concave inwards and matched with the protruding block and the inserting parts are formed in the bottom wall of the butt joint groove, and the protruding block is used for being matched with the inserting parts to limit the tooth head in the circumferential direction. The cutting pick is provided with the pick handle and the pick head which are detachably connected, when the pick head needs to be replaced due to abrasion or damage, only the pick head part needs to be replaced, the whole cutting pick does not need to be replaced, material waste is reduced, and the production cost and the maintenance cost are reduced.

The present invention relates to a hydraulic rotary drilling machine and a control method thereof, belonging to the technical field of mechanical equipment, including a platform frame, a plurality of cutting head assemblies are arranged at the lower end of the platform frame, a reducer is arranged between the cutting head assembly and the platform frame and is connected to the cutting head assembly by spline shaft nesting transmission, a pair of scraper frames which are distributed in a mirror-symmetrical manner on the left and right and are bolted to the lower end of the platform frame are arranged at the rear end of the cutting head assembly, and a grab bucket assembly which is movably inserted and sleeved with the platform frame is arranged at the upper end of the platform frame. It has the characteristics of compact structure, convenient disassembly, good operation stability and long service life. It solves the problem that a base cannot be built on a mountain. It improves the stability of drilling operation, reduces shaking caused by high-speed operation, and avoids jamming and drill back phenomena.

The invention discloses a multi-cutting-device collaborative coal cutting non-beveling feed system which comprises a machine nest cutting device and a scraper conveyor, the machine nest cutting device comprises a traction part, a rotating arm and a cutting roller, the cutting roller is arranged at the first end of the rotating arm, and the scraper conveyor is arranged at the second end of the rotating arm. The second end of the rotating arm is pivotally connected with the traction part, the rotating arm is used for driving the cutting roller to move relative to the coal seam, the extending direction of the scraper conveyor is perpendicular to the advancing direction of the working face, the two ends of the scraper conveyor are each provided with a machine nest cutting device, and the traction part of each machine nest cutting device moves along the scraper conveyor; the drum shearer is arranged in the middle of the scraper conveyor and used for cutting a coal seam, and the hydraulic support is arranged on the side, away from the working face, of the scraper conveyor and used for supporting a top plate. The multi-cutting-device collaborative coal cutting non-beveling feed system provided by the invention has the advantages of high cutting efficiency and small influence on the original process.

The invention discloses a heterogeneous hard rock stratum continuous excavation cutting control method based on a neural network. Comprising the steps of establishment and training of a deep neural network model, establishment and training of a convolutional neural network model, testing of pre-drilling fracturing operation, extraction and updating of fractured rock stratum characteristics, prediction and control of cutting specific energy consumption, pre-drilling fracturing operation and continuous mining operation. Performing visual identification on the working face of the strip mine and updating the second deep neural network model; the pre-drilling fracturing operation is controlled and adjusted according to the cutting ratio energy consumption index, and it is ensured that the cuttable performance of the heterogeneous hard rock stratum meets the requirement; by monitoring the actual cutting ratio energy consumption value in real time and updating the deep neural network model, the threshold value of the cutting ratio energy consumption is adjusted, and then the technical parameters of the cutting mechanism are adjusted, so that the real-time control and adjustment of the continuous mining operation are realized, and the economical efficiency and the high efficiency of the continuous mining operation of the strip mine in the heterogeneous hard rock stratum environment are improved.

The invention discloses a low seam few-person fully mechanized coal mining face mining system and method, the system comprises a coal mining machine automatic control system and a hydraulic support electrohydraulic control system, the coal mining machine automatic control system realizes position information transmission and height adjustment of a coal mining machine; the hydraulic support electro-hydraulic control system achieves hydraulic support pulling, pushing and sliding, machine following and support moving and automatic control over actions of the hydraulic support, and the remote control system conducts three-machine linkage control over key production equipment of the fully mechanized coal mining face, automatic control, locking, sudden stop, fault diagnosis, automatic liquid supplementing and data information transmission on the hydraulic support. Coal face equipment has the functions of coal wall video monitoring and the like, and the production process is automatically completed; the coal mining process is intelligent, data transmission is informationized, and on-site operators operate and produce with few persons, so that manual intervention is reduced as much as possible, and high-yield, efficient and safe production is ensured.

The invention provides a high-gas coal roadway rapid tunneling system and method, and the system comprises a spraying and drilling and anchoring integrated support tunneling and anchoring machine, an anchor rod reversed loader, a bridge type reversed loader, a self-moving tail and a gas extraction drill carriage, the spraying and drilling and anchoring integrated supporting digging and anchoring machine comprises a rack, a cutting part, a spraying mechanical arm, a drilling and anchoring integrated drilling arm, a telescopic sliding device, a spraying material box, an anchoring agent material box and digging-following gas monitoring equipment. By spraying and supporting the surface of the roadway, sealing of the surrounding rock surface of the roadway is achieved, the gas concentration increasing speed of the driving working face is slowed down, and meanwhile gas extraction operation in the tunneling process is dynamically carried out by monitoring the gas concentration of the driving working face. The supporting speed can be increased by adopting the drilling and anchoring integrated drilling arm.

The invention relates to the technical field of coal mine intellectualization, and provides an inter-face coal pillar digging and mining robot which comprises a right-angle turning scraper conveyor and a digging and mining robot body. The digging and mining robot is mounted on the right-angle turning scraper conveyor; the digging and mining robot comprises a cutting system, and the cutting system is located on a machine body of the digging and mining robot. Wherein the cutting system is driven by the electric cylinder to move, and vertical cutting of a rectangular section is completed through compound movement of the feeding electric cylinder and the height adjusting electric cylinder; after the cutting action is completed, a walking system of the digging and mining robot moves by one cut width along the right-angle turning scraper conveyor, and the actions are repeated until the whole section is pushed by one cut distance; wherein in the cutting process, the fallen coal is transferred into the right-angle turning scraper conveyor; the stability of the cutting system in the cutting and walking process is ensured through the anti-overturning effect of the guide sliding shoes in the walking system of the digging and mining robot and the force effect of the hydraulic support matched with the right-angle turning scraper conveyor.

The invention relates to the technical field of thin seam mining equipment, in particular to a thin seam mining machine which comprises a driving assembly, a transmission assembly, a machine body, a first cutting assembly and a second cutting assembly, and the first cutting assembly and the second cutting assembly are arranged on the two sides of the machine body in the extending direction. The driving assembly and the transmission assembly are arranged in the machine body, the driving assembly is arranged between the first cutting assembly and the second cutting assembly, the input end of the transmission assembly is connected with the output end of the driving assembly, and the first output end of the transmission assembly is connected with the input end of the first cutting assembly; and the second output end of the transmission assembly is connected with the input end of the second cutting assembly. According to the thin seam coal mining machine, the single motor is arranged to drive the rollers on the two sides, the size of the coal mining machine is reduced, and the coal mining flexibility is improved.

The present invention discloses a device and method for breaking coal, relieving pressure and increasing permeability by using a pneumatic flexible tool in a soft coal seam, which comprises: a drilling rig, in which a drill rod is installed, and the shaft of the drill rod is provided with an air flow cavity of a columnar structure, and the outer ring wall of the top end of the drill rod at the outermost end is provided with a partial thread; an air compressor pump, the output end of which is sealed and connected to the air flow cavity through a high-pressure air pipe; pneumatic slitting equipment, which comprises a pneumatic rotating device and a slitting device, the left end of the pneumatic rotating device is installed on the top end of the drill rod at the outermost end, and the right end of the pneumatic rotating device is installed with the slitting device, and the drill rod, the pneumatic rotating device and the slitting device are all coaxially arranged.

A mixed feed efficient mining method includes the steps that firstly, an air way, a machine way and a cutting hole are formed, a coal pillar is reserved at the left end of a working face, the length of the reserved coal pillar is larger than that of a single-drum coal mining machine, a machine nest is formed in the right side of the reserved coal pillar, and the length of the machine nest is not smaller than the sum of the length of a double-drum coal mining machine and the length of beveling feed; the single-drum coal mining machines are arranged in the roadways at the two ends of the fully mechanized coal mining face, the double-drum coal mining machines are arranged on the scraper conveyor at the machine nest section, when the double-drum coal mining machines run to be close to the left end or the right end of the fully mechanized coal mining face, reverse beveling feeding is directly carried out for next coal cutting, and it is not needed that coal is cut back and forth after conventional beveling feeding is carried out; coal pillars left at the two ends of the working face are cut by the two-end single-drum coal mining machine through vertical feeding, coal mining at the two ends and the middle section of the working face is achieved at the same time, the mining efficiency is greatly improved, the number of arranged working faces is reduced, the labor time of workers is shortened, and the economic benefits of enterprises are increased.

The invention discloses a thin coal seam cutting device, a coal mining machine and a coal mining system.The thin coal seam cutting device comprises a roller and a plurality of first cutting teeth, the first cutting teeth are arranged on the end face of the first end of the roller at intervals, and compared with the first cutting teeth far away from the central axis of the roller, the first cutting teeth are smaller than the first cutting teeth; the tooth tips of the first cutting teeth close to the central axis of the roller are farther away from the end face of the first end of the roller, the tooth tips of the multiple first cutting teeth are located on a first arc face, and the first arc face is an arc face protruding in the direction away from the end face of the first end of the roller. Compared with the prior art that the end part of a feed cutting device is generally of a plane structure, the thin coal seam cutting device provided by the embodiment of the invention can more efficiently destroy a coal wall and cut the coal wall during feed, so that the coal mining speed and the coal mining efficiency are greatly improved, and in addition, the cutting efficiency of the thin coal seam is greatly improved. The thin coal seam cutting device provided by the embodiment of the invention is high in cutting strength and suitable for cutting harder coal rocks.

The utility model relates to a novel permanent magnet direct drive motor chain transmission cutting device for a mining machine, which comprises a main frame, a cutting roller, a power source and a transmission structure connected between the cutting roller and the power source, the transmission structure comprises a front transmission shaft, a rear transmission shaft and a transmission chain connected between the front transmission shaft and the rear transmission shaft, the transmission chain and the cutting roller are connected and rotate synchronously, the power source is used for directly or indirectly driving the cutting roller to rotate, and the power source is electric energy driving equipment including a permanent magnet direct drive motor. The cutting roller is indirectly or directly driven to rotate by using electric energy driving equipment such as a permanent magnet direct drive motor, only electric energy is consumed when the cutting roller works, no extra pollutants are generated, and the cutting roller is more environment-friendly and energy-saving.

The utility model belongs to the technical field of cutting arms, and particularly relates to an impact-resistant cutting arm for a hard rock heading machine. Comprising a cantilever cylinder; the cutting main shaft is installed in the cantilever cylinder, a self-aligning roller bearing, a thrust bearing and a cylindrical roller bearing are sequentially arranged between the cutting main shaft and the cantilever cylinder from front to back, a framework oil seal II is arranged behind the cylindrical roller bearing, and a framework oil seal I is arranged in front of the self-aligning roller bearing; the front end of the cantilever cylinder is provided with a floating sealing frame sleeved on the cutting main shaft, the front end of the floating sealing frame is provided with a floating sealing seat sleeved on the cutting main shaft, the floating sealing seat is provided with a mechanical labyrinth seal, and a floating seal is arranged between the floating sealing frame and the floating sealing seat; and the cutting head is fixed at the front end of the cutting main shaft. When the cutting arm of the hard rock heading machine is used for cutting rocks of which the compressive strength is more than 70MPa, the service life of the cutting arm is prolonged.

The utility model discloses a coal cutting pick for coal mining in the technical field of coal mining, which comprises a base of the coal cutting pick and a digging tooth sleeved on the outer side of the base, one end of the base is provided with a fixing groove, one end of the digging tooth is provided with a placing groove, the inner side of the placing groove is connected with a fixing block, and the fixing block is connected with the digging tooth. Locking pieces are installed between the digging teeth and the base, a fixing part is connected to the outer side, close to one end, of the base, one end of the base is inserted into a containing groove in one side of the digging teeth, meanwhile, a fixing block on the inner side of the containing groove is inserted into a fixing groove in one side of the base, and a gasket can be located between the fixing block and the fixing groove. By means of the technical scheme, the spacer can conduct anti-collision and anti-abrasion protection on the fixing block, the base and the digging teeth are spliced and installed again through the locking piece, and the problems that the stability of splicing installation of the cutting tooth head and the cutting tooth base is low, consequently, the cutting tooth head and the cutting tooth base shake or disengage, and disassembly and replacement operation of the cutting tooth head and the cutting tooth base are strenuous are solved.

The invention provides a spraying and drilling and anchoring integrated tunneling device which comprises a cantilever type tunneling machine, a moving assembly, a drilling and anchoring integrated drill arm, a spraying mechanical arm and a control assembly, the cantilever type tunneling machine comprises a rack, a crawler belt assembly is connected with the rack, and a sliding large arm part can move relative to the rack; the adjusting arm is connected with the sliding large arm and can move relative to the sliding large arm, the drilling and anchoring integrated drilling arm is connected with the adjusting arm and can move relative to the adjusting arm, the drilling and anchoring integrated drilling arm is used for anchoring the wall face of a roadway, and the spraying mechanical arm is connected with the adjusting arm and used for spraying supporting materials to the wall face of the roadway. The control assembly is used for coordinating the movement time sequence of the moving and drilling and anchoring integrated drilling arm and the spraying mechanical arm. According to the drilling and anchoring integrated anchor rod parallel operation tunneling device, tunneling, spraying and drilling and anchoring procedures are carried out on a roadway through cooperative movement and adjustment of a plurality of components, repeated transposition of tunneling and supporting is avoided, and the tunneling efficiency is improved.

A three-coal-mining-machine efficient mining method includes the steps that firstly, an air way, a machine way and a cut hole are formed, notches are formed in the two ends of the cut hole in advance, and the length of the notches is not smaller than the sum of the length of a single-drum coal mining machine and the length of a double-drum coal mining machine; the front portions of the two ends of the working face are beveled, fed and pre-cut to form machine nests through the two single-drum coal mining machines, a roof is supported through the lagging supporting support and the timely supporting support, and the requirement for the width of a roadway can be lowered by adopting the beveled feeding mode of the single-drum coal mining machines; in addition, the single-drum coal mining machines on the two sides perform pre-cutting operation at the two ends of the working face and the double-drum coal mining machine perform coal cutting operation in the middle of the working face synchronously, and after the double-drum coal mining machine enters a left-end or right-end machine nest, the double-drum coal mining machine directly performs reverse beveling feeding for next coal cutting, so that the mining efficiency of the working face is improved; the working face arrangement number is reduced, the labor time of workers is shortened, and the economic benefits of enterprises are increased.

The invention discloses a coal cutter roller control device and method integrating elastic wave and infrared temperature measurement, and relates to the technical field of safe mining of deep mine coal, and the coal cutter roller control device integrating elastic wave and infrared temperature measurement mainly comprises an elastic wave detection module and an infrared monitoring module. The elastic wave detection module is used for detecting a coal seam thickness value and a coal-rock interface layer position and controlling a roller of the coal mining machine to rise and fall; the infrared monitoring module is used for collecting temperature data and obtaining and storing a temperature threshold value. The coal mining machine roller control device integrating elastic wave and infrared temperature measurement and the control method can adapt to complex construction environments and severe geological conditions, and the safety and efficiency of deep mine coal mining are improved.

The invention discloses a radial oscillation cutting mechanism. The core structure of the device is composed of a transmission shaft, an eccentric block, an eccentric jumping wheel, an oscillation cutting disc base, an oscillation cutting disc and the like. In the operation process, the motor serves as a power source to drive the shaft to rotate, the shaft rotates to drive the eccentric block to rotate along with the shaft, and then the two eccentric jumping wheels arranged in the 180-degree phase difference mode are promoted to start to move. The two eccentric jumping wheels are matched with the pin in a cam mode, so that the two eccentric jumping wheels move along a unique curve track. Due to the fact that the base of the oscillation cutting disc is tightly and fixedly connected with one eccentric jumping wheel, the unique movement transmission mechanism is achieved, then the oscillation cutting disc is successfully driven to execute hard rock cutting operation, and a solution which is extremely innovative and efficient is provided for hard rock cutting engineering.

The utility model provides a heading machine. The heading machine comprises a machine body; the first rotating part is arranged at the front end of the machine body; the cutting assembly is connected with the first rotating part and can swing up and down under the action of the first rotating part; the first detection assembly is connected with the first rotating part and is used for detecting the lifting amplitude of the cutting assembly; the control assembly is connected with the first detection assembly and used for determining the final lifting amplitude of the cutting assembly according to the detection result of the first detection assembly; wherein the first detection assembly comprises a first gear which is connected with the first rotating part and can synchronously rotate along with the first rotating part; the second gear is meshed with the first gear; the first angle sensor is connected with the second gear and used for converting the rotation angle of the second gear into an electric signal and sending the electric signal to the control assembly. The heading machine can stably measure the lifting amplitude of the cutting assembly of the heading machine with high precision.

The utility model discloses a tooth holder for heightening a roller of a coal mining machine, which comprises a tooth sleeve, a tooth holder is arranged at one end of the tooth sleeve, a tooth column is arranged in the tooth sleeve, a tooth boot is arranged at the upper end of the tooth column, and a cutting pick is arranged at the upper end of the tooth boot. The height adjusting structure is located in the tooth holder; the rotating structure is located in the gear sleeve, and a limiting structure is arranged at one end of the gear sleeve; the two ends of the gear sleeve are rotationally connected with the rotating shafts, and the two rotating shafts are fixedly connected with the gear column; and the number of the mounting plates is two, and the mounting plates are connected with the height adjusting structure. Compared with the prior art, the cutting pick has the advantages that the pick holder can be conveniently heightened, and the angle of the cutting pick can be adjusted.