593results 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 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 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 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 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 coal mining machine roller comprises a roller body and a cutting tooth assembly, the roller body comprises a cylinder body, an end disc and an end cover, the end disc is arranged on the peripheral wall of the cylinder body in a sleeving mode, the end disc is flush with the first end of the cylinder body, the end cover is connected with the inner peripheral wall of the cylinder body, the cutting tooth assembly is arranged on the inner peripheral wall of the cylinder body, and the cutting tooth assembly is arranged on the inner peripheral wall of the cylinder body. A groove is defined between the end cover and the roller body, the cutting tooth assembly comprises a plurality of cutting teeth, the plurality of cutting teeth are arranged at intervals in the circumferential direction of the center line of the roller body, 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 roller of the 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 an impacting-splitting-cutting composite rock breaking configuration of a cantilever type heading machine, relates to the field of coal mine underground heading equipment, and solves the problems of low efficiency, serious cutting pick abrasion, poor stability and insufficient adaptability of an existing heading machine during hard rock operation. A multi-stage cylinder executing mechanism is arranged on a cutting arm of the heading machine, an angle adjusting rotary table is arranged at the upper end of the multi-stage cylinder executing mechanism, and a breaking hammer and a rock cracking machine are arranged on the angle adjusting rotary table; the angle adjusting rotary table comprises a track plate and a rotary table, and the rotary table drives the track plate to rotate; a breaking hammer is arranged at one end of the track plate, and a rock cracking machine is arranged at the other end. The breaking hammer and the rock cracking machine are integrated at the front end of the heading machine, pre-broken rock can be split, the number of times of breaking is reduced, vibration and noise caused by repeated breaking are avoided, the internal stress of a rock stratum is damaged by additionally arranging the rock cracking machine, other work of the whole machine is not affected, and the service life of the heading machine is not affected.

The present application provides a kind of slotted equipment for coal seam gas control, belong to coal seam gas control technical field, including two slotted mainframes of synchronous coordination work, two slotted mainframes are arranged in the roadway of coal seam two sides respectively, and two slotted mainframes are driven connection through annular cutting cable between two slotted mainframes;Slotted mainframe includes self-propelled platform, power module, speed reducer, gear reversing device and main drive line wheel are set in self-propelled platform upper portion, power module passes through speed reducer and transmits power to gear reversing device;The present application uses annular cutting cable of cyclic motion as cutting force, and combines the feeding force provided by two slotted mainframes of synchronous coordination work, can cut out one or two slotted in coal seam transversely, instead of traditional high-density drilling, not only greatly reduces labor intensity, saves cost, and the permeability area formed by slotted is larger, more conducive to the desorption of gas, to greatly improve gas extraction efficiency.

The invention relates to a hydraulic slotting and fracturing integrated collaborative operation system, and belongs to the technical field of coal mining. The system comprises a multi-parameter three-dimensional monitoring module, a multi-mode cooperative control module, a hydraulic fracturing module and a hydraulic slotting module. The multi-parameter three-dimensional monitoring module is used for carrying out crack three-dimensional modeling, stress field dynamic tracking and gas component real-time analysis; the multi-mode cooperative control module analyzes the geological exploration data output by the multi-parameter three-dimensional monitoring module to obtain geological parameters, and generates an operation scheme according to the geological parameters; and the hydraulic fracturing module and the hydraulic slotting module cooperatively work under the control of the multi-mode cooperative control module. Through the integrated collaborative design of hydraulic slotting and fracturing, the limitation of a single process is broken through, the construction efficiency and uniformity of a crack network are improved, the stability and coverage range of a gas extraction channel are improved, and a full-process intelligent solution is provided for safe and efficient mining of a complex coal seam.

Disclosed are a shearer having an adaptive variable cutting line distance and a cutting method for the shearer. The shearer comprises a box (1), a traveling mechanism (2), a pitch mechanism (3), a longitudinal moving mechanism (5), a cantilever, and cutting mechanisms (7). By means of the traction of a longitudinal moving mechanism, a cantilever of the shearer drives a drum cutting head to perform a longitudinal reciprocating cutting motion, thereby improving the cutting range and efficiency; moreover, by regulating the longitudinal movement speed of the cutting head, the cutting line distance of the shearer can be significantly decreased, the problem of insufficient cutting capacity caused by a small cutting thickness during coal rock cutting is solved, and the risk of failure and damage of mechanisms is reduced; by means of the arrangement of sensors, coal rock can be classified into normal-hardness coal rock, high-hardness coal rock, and ultra-high-hardness coal rock on the basis of load conditions; and when the hardness is relatively high, the cutting thickness and the cutting line distance can be decreased so as to improve the cutting capacity, and when the hardness is relatively low, the cutting thickness and the cutting line distance can be appropriately increased so as to increase the cutting speed, so that the shearer can adapt to relatively complex working conditions, thereby achieving high-quality and high-efficiency cutting.

The invention provides a manufacturing method of a hard alloy for a hard rock cutting pick, which relates to the field of alloy preparation and comprises the following steps: step 1, preparing raw material powder for preparing the hard alloy for the hard rock cutting pick according to the proportion of raw materials; 2, mixing the raw material powder in the step 1 to obtain mixed powder; 3, putting the mixed powder obtained in the step 2 into a lower mold, and pressing on a press machine to obtain a pressed blank; step 4, sintering: primary sintering: putting the pressed green body into a first sintering furnace, and sintering at a first preset temperature; secondary sintering: putting the green body subjected to primary sintering into a second sintering furnace, and sintering at a second preset temperature; and 5, the hard alloy block obtained after secondary sintering is subjected to finish machining treatment according to the design size of the hard alloy part of the hard rock cutting tooth. According to the method, double-temperature-zone sintering is conducted, impurities / stress is removed through primary sintering (protective atmosphere), and grain growth is precisely regulated and controlled through secondary sintering (vacuum).

The digging and anchoring integrated equipment comprises a machine body, an anchoring device and a temporary supporting device, the anchoring device comprises a working table and a first anchoring and protecting assembly, the working table is arranged on the machine body and can move relative to the machine body in the length direction of the machine body, and the first anchoring and protecting assembly is rotationally connected to the working table in the length direction of the machine body; the temporary supporting device comprises a supporting frame and a sliding top plate, the supporting frame is rotationally connected with the machine body, and a first driver is arranged between the supporting frame and the machine body and used for driving the supporting frame to rotate around the width direction of the machine body relative to the machine body; the sliding top plate is slidably connected with the supporting frame, a second driver is arranged between the supporting frame and the sliding top plate, and the second driver is used for driving the sliding top plate to move towards the roadway head-on direction relative to the supporting frame so as to form advanced temporary supporting. According to the invention, zero empty roof can be realized, integrated and automatic operation of roadway tunneling and anchoring operation is completed, and the construction efficiency and quality are greatly improved.

The invention provides a four-direction intelligent directional forward-going and backward-going perforation auxiliary cutting mechanism which comprises a protection shell, a cutting mechanism, a cutting mechanism, a cutting mechanism, a cutting mechanism, a cutting mechanism and a cutting mechanism, and is characterized in that a mounting cavity is formed in the protection shell, and a rear end cover is arranged at the rear end of the mounting cavity; the driving piece is arranged in the mounting cavity of the protective shell and is mounted on the inner end surface of the rear end cover; the eccentric block is mounted at the output end of the driving part; an inclined inner hole is formed in the end, away from the driving piece, of the eccentric block. An included angle exists between the axis of the inclined inner hole and the axis of the eccentric block. And the oscillating cutting part comprises a connecting shaft and an oscillating cutting head located at the front end of the connecting shaft, the connecting shaft is movably installed in the inclined inner hole, the end, away from the connecting shaft, of the oscillating cutting head extends out of the installation cavity, and a plurality of cutting blades are arranged on the circumference of the outer surface of the oscillating cutting head. Wherein the driving piece rotates to drive the eccentric block to rotate, and the eccentric block rotates to drive the oscillating cutting part to cyclically swing periodically, so that the cutting blade mills coal rocks. The problems that cutting resistance is large, cutting blades are seriously abraded, the dust yield is high, hard rock cutting efficiency is low, and energy consumption is large are solved.

The invention relates to the technical field of gold mine mining, in particular to a gold mine mining rope saw cutting machine combined type guide wheel structure which mainly comprises a first fixing column, an anti-disengaging mechanism and a locking mechanism, a guide wheel is rotationally installed at one end of the first fixing column through a bearing, a first sleeve is installed on the outer wall of the first fixing column, and the anti-disengaging mechanism is arranged on the outer side of the guide wheel. And the locking mechanism is arranged on one side of the guide wheel. A pull rod is pulled to drive a moving plate and an L-shaped strip to move and extrude a first elastic part, the L-shaped strip moves out of a limiting groove, two supporting plates and an anti-shelling shell are adjusted to move to proper positions, the pull rod is loosened, the first elastic part pushes the moving plate and the L-shaped strip to move, the L-shaped strip moves to the limiting groove for limiting, and the L-shaped strip, the supporting plates and the anti-shelling shell are fixed in a limiting mode. The rope on the guide wheel is limited and prevented from falling off through the anti-falling shell, the rope cannot be separated from the guide wheel, the walking path of the rope is not prone to deviation, and then the cutting accuracy and efficiency are improved.

The invention relates to an intelligent control method, system, equipment and medium for automatic discharging mining tunneling cutting picks, and the method comprises the following steps: monitoring the flowing state of coal rock slag in a spiral discharging channel in real time, collecting a channel pressure difference signal and a cutting pick vibration signal, and generating discharging state characteristic parameters; blocking risk quantification is carried out on the characteristic parameters, and a real-time blocking index is generated through weighted fusion calculation; based on the index, a cutting head rotating speed optimization adjustment amount is generated through a fuzzy reasoning mechanism; and finally, generating a rotating speed control instruction through dynamic amplitude limiting processing and sending the rotating speed control instruction to a variable-frequency driving system. By means of the method, real-time sensing and dynamic self-adaptive adjustment of the blockage risk of the discharging channel are achieved, the problem that the discharging channel is blocked due to coal rock property changes is effectively solved, the discharging efficiency and the stability of tunneling operation are improved, and the service life of cutting teeth is prolonged.

A transverse cutter head for a mining machine has an outer surface including a plurality of cutting tools. Tips of the plurality of cutting tools define a virtual contour line when viewed in a cutter boom longitudinal direction and a rotation of the cutter head is considered. The contour line is formed by at least four sections, namely a first section, a second section, a third section and a fourth section. The four sections are located adjacently in this order, wherein the first section is located closest to the cutter boom and the fourth section forms a side wall cutting area. The first section and / or the fourth section run substantially straight. Each one of the first section, the second section, and the third section has a pitch angle different from the pitch angle of the other two sections. A roadheader having such a cutter head is also provided.

Mining machine (100) which features the following: a plurality of sensors (305), each of the plurality of sensors (305) being positioned at one of a plurality of measuring points on at least one component of the mining machine (100); a first electronic processor (235) coupled with and configured to be used with at least one component, to receive at least one movement order; and to control at least one component based on at least one movement command; and a second electronic processor coupled to the first electronic processor (235) and the plurality of sensors (305) and configured to determine at least one predicate parameter, wherein the at least one predicate parameter includes a rate of change of a motor parameter of the mining machine (100); to determine whether at least one predicate parameter is true; and while the first electronic processor (235) controls at least one component and at least one predicate parameter is true, to receive a large number of vibration data sets from the large number of sensors (305).

The invention relates to the technical field of tunneling equipment, in particular to transverse shaft type tunneling equipment and a spraying flow distribution mechanism thereof. The spraying flow distribution mechanism of the transverse shaft type tunneling equipment comprises a fixing assembly and a rotating assembly, the rotating assembly comprises a fixing base and an end cover which define a water pressure cavity, and the fixing assembly comprises a connecting shaft extending into the water pressure cavity through the fixing base and a flow distribution disc installed on the connecting shaft and located in the water pressure cavity. A matching face used for being attached to the valve plate is arranged on the fixing base, a water channel is arranged in the connecting shaft, the water outlet end of the connecting shaft is located on the side, facing the end cover, of the valve plate, the end cover is provided with a rotating installation hole and an end cover water channel, and the water outlet end of the connecting shaft is rotatably installed in the rotating installation hole. The end cover water channel communicates with a water outlet of the water outlet end of the connecting shaft and the water pressure cavity. The axis position of the connecting shaft is guaranteed, the coaxiality of the rotating assembly and the fixing assembly is guaranteed, and eccentric wear between the matching faces of the valve plate and the fixing base due to installation deviation is not prone to occurring.

The invention discloses a vertical feed coal mining system and a coal mining method. The vertical feed coal mining system comprises a reversed loader, a hydraulic support, a scraper conveyor, a plurality of single-drum rocker arm type drum coal mining machines and a plurality of mechanical arms, the single-drum rocker arm type drum coal mining machines can move in the arrangement direction of the scraper conveyor, and coal briquettes cut by the single-drum rocker arm type drum coal mining machines are conveyed to the reversed loader through the scraper conveyor. The multiple mechanical arms are arranged on the scraper conveyor at intervals, the multiple mechanical arms correspond to the multiple single-drum rocker arm type drum coal mining machines in a one-to-one mode, the single-drum rocker arm type drum coal mining machines are coupled and positioned with the scraper conveyor through the mechanical arms, vertical feeding is achieved under pushing of the hydraulic support, and therefore the coal mining operation method is greatly simplified, and the coal mining efficiency is improved. The problems that a fully mechanized coal mining face is difficult to level, a scraper machine is difficult to straighten and the like in a traditional beveling feed coal mining process are solved, the mining efficiency of the fully mechanized coal mining face is greatly improved, and meanwhile automation and intelligentization of the fully mechanized coal mining face are better achieved.

The utility model relates to the technical field of coal mining machine accessories, in particular to a self-adaptive cutting coal mining machine roller which comprises a roller body and a cutting tooth assembly frame fixedly installed on the roller body, a plurality of cutting teeth are fixedly installed on the cutting tooth assembly frame, a center main shaft is fixedly installed at the center position of the roller body, and a plurality of cutting teeth are fixedly installed on the center main shaft. End rods are fixedly installed at the two ends of the center main shaft, a fixing sleeve is fixedly installed on one end rod, a first sensor is arranged on the fixing sleeve, an outer rotating sleeve is rotationally connected to the other end rod, a second sensor is arranged on the outer rotating sleeve, a connecting rod is fixedly installed at the bottom of the outer rotating sleeve, and a balancing weight is fixedly installed at the bottom end of the connecting rod. According to the utility model, the orientation of the first sensor is the same as that of the roller main body, the second sensor always keeps horizontal for detection, and the use is convenient.

The invention relates to three-machine combined mining equipment and process, the equipment comprises a conveyor, and a main mining coal mining machine, a left notched coal mining machine and a right notched coal mining machine which take the conveyor as a moving track, and the left notched coal mining machine and the right notched coal mining machine are respectively arranged at the left end part and the right end part of the conveyor; the main mining coal mining machine is arranged between the two notching coal mining machines, the main mining coal mining machine is a double-rocker-arm coal mining machine, the left notching coal mining machine and the right notching coal mining machine are single-rocker-arm coal mining machines only provided with left rocker arms and single-rocker-arm coal mining machines only provided with right rocker arms respectively, and rocker arms of the notching coal mining machines are sliding rocker arms; during mining, the two notching coal mining machines are respectively responsible for cutting left and right end notches in advance, the main mining coal mining machine reciprocates between the two end notches to efficiently mine the middle coal wall at a high speed, the inclined cutting feed process is completely omitted, the end notch mining and the middle coal wall mining can be simultaneously carried out, and the overall mining efficiency is obviously improved.

The invention discloses a thin-wall coal seam coal mining machine adaptive to left-right inclination of a bottom plate, the thin-wall coal seam coal mining machine comprises a machine body, a first cutting roller, a second cutting roller, a first sliding shoe, a second sliding shoe and an angle adjusting assembly, the first cutting roller and the second cutting roller are arranged on the machine body at an interval along the length direction of the machine body; the first sliding shoe and the second sliding shoe are arranged on the machine body in the length direction of the machine body in a spaced mode. The angle adjusting assembly is arranged on the machine body and connected with the first sliding shoe. According to the coal mining machine, the inclination angle of the machine body in the left-right direction of the bottom plate is adjusted through the angle adjusting assembly to adapt to inclination of the bottom plate in the left-right direction, it can be guaranteed that the two cutting rollers can effectively cover the height of the whole coal seam all the time, loss of the coal seam is reduced, and the coal mining efficiency is improved. The coal mining machine can adapt to different inclination conditions of the bottom plate, the adaptability of the machine to different coal seam conditions is enhanced, and the universality and practicability of the machine are improved.

The invention relates to the technical field of thin coal seam mining equipment, in particular to a thin coal seam mining machine with separated cavities. The thin seam mining machine arranged in the separated cavities comprises a machine body, a cover plate assembly and a lubricating assembly, the machine body comprises a first shell, a transmission shell and a third shell which are sequentially arranged at intervals in the extending direction of the machine body, the first shell is provided with a first cavity, the transmission shell is provided with a transmission cavity, the third shell is provided with a third cavity, and the cover plate assembly comprises a plurality of cover plates. The first shell, the transmission shell and the third shell are each provided with a detachably-connected cover plate, the cover plates are used for opening or sealing the corresponding first cavity, the transmission cavity or the third cavity, the lubricating assembly comprises a plurality of lubricating pumps, the cover plates are provided with liquid passing oil ways, and the output ends of the lubricating pumps communicate with inlets of the liquid passing oil ways of the cover plates. Outlets of the liquid passing oil ways of the cover plates face the directions corresponding to the bottoms of the first cavity, the transmission cavity and the third cavity. According to the thin seam coal mining machine arranged in the divided cavities, the oil way of the coal mining machine can be conveniently cleaned, and the running stability of the coal mining machine is improved.

The invention provides a mechanical arm auxiliary operation anchor rod reversed loader for a single drilling rig and a control method of the mechanical arm auxiliary operation anchor rod reversed loader. The anchor rod reversed loader comprises an anchor rod reversed loader body, and the anchor rod reversed loader body is provided with a walking mechanism, a chassis, a material receiving part, a crushing part and a discharging part; and the automatic anchor protection system is arranged on the anchor rod reversed loader body and used for carrying out anchor rod supporting operation on the roadway roof when the anchor rod reversed loader body enters the anchor protection state. According to the mechanical arm auxiliary operation anchor rod reversed loader for the single drilling rig, the walking mechanism, the crushing part and the automatic anchor protection system are arranged on the anchor rod reversed loader body, the integrated operation of walking, transporting, crushing and anchor protection is achieved, the automatic anchor protection system can implement full-process automation of an anchor rod supporting technology in a roadway, and the working efficiency is improved. Workers do not need to operate beside, so that the workers are prevented from working in an environment with serious dust, the safety of the workers is improved, and the labor intensity of the workers is reduced.

The utility model relates to the technical field of cutting pick holder components, in particular to a cutting pick holder component capable of automatically adjusting height for a coal mining machine, which comprises a cutting pick body, an adjusting device is arranged on one side of the cutting pick body, the adjusting device comprises a mounting cylinder, a sliding chute is arranged in the mounting cylinder, a sliding block is arranged in the sliding chute, and a cutting pick holder is arranged in the sliding block. A supporting spring is arranged on one side of the sliding block, a push plate is arranged at the other end of the supporting spring, and a connecting cylinder is arranged on one side of the push plate. According to the cutting tooth holder assembly capable of automatically adjusting the height for the coal mining machine, the effect of facilitating sliding of the cutting tooth body is achieved through matched use of the mounting cylinder, the sliding groove and the sliding block, the effect of pushing the cutting tooth body to reset is achieved through matched use of the push plate and the supporting spring, and the effect of facilitating rotation of the threaded rod is achieved through matched use of the connecting cylinder and the rotating disc.

The utility model provides crushing coal mining equipment, and relates to the technical field of coal mining equipment, the crushing coal mining equipment comprises a vehicle body, a machine arm is rotatably arranged at the top end of the vehicle body, an output rod of a hydraulic rod is rotatably connected with one side of the top end of the machine arm, a crushing device is arranged in a collecting shovel, the crushing device comprises a round roller, and the round roller is rotatably connected with the machine arm. The crushing device is arranged, the first motor is operated to drive the round roller to rotate, coal briquettes are conveyed to the round roller through the conveying belt, the conveying belt is used for conveying the coal briquettes to the round roller, the conveying belt is used for conveying the coal briquettes to the round roller, and the conveying belt is used for conveying the coal briquettes to the round roller. The tooth blocks on the outer surface of the circular ring are used for further crushing coal briquettes entering the round roller on the surface of the conveying belt, the coal briquettes with large sizes are crushed and separated as much as possible, the conveying belt moves outwards so that the coal briquettes in the collecting shovel can be conveyed outwards conveniently, and the efficiency of taking the coal briquettes out of the collecting shovel is improved; and the flexibility and the practicability of the coal mining equipment in use are improved.

The utility model discloses a hard rock cutting pick with a composite wear-resistant layer structure, which comprises a cutter handle, an alloy cutter head and a conical ring sleeve, and an alloy head is arranged at the top end of the alloy cutter head; and an auxiliary blade is arranged on the outer surface of the alloy head. According to the hard rock cutting pick with the composite wear-resistant layer structure, through the arrangement of the auxiliary blade, the sawtooth blade, the small chamfers, the alloy head and the alloy tool bit, when the hard rock cutting pick is used, the auxiliary blade can firstly make contact with a cut object, mechanical energy cutting can be conducted on the object through the auxiliary blade, and the friction force of the alloy head is reduced; when a certain distance is cut, the sawtooth blade can make contact with a cut object, due to the fact that the small chamfer is arranged at one end of the sawtooth blade, cutter feeding can be facilitated, the friction force of the alloy cutter head is greatly reduced, cutting is facilitated to a certain degree, and the service life of the cutting pick can be prolonged.

The invention relates to a base (10) for accommodating a chisel holder (30), comprising a main body (13) which has a holder seat (14) for accommodating the chisel holder (30), the holder seat (14) having: a socket (18); at least one front supporting surface (15.1, 15.2), which is located at least partially in front of and / or to the side of the socket (18); and at least one rear supporting surface (16.1, 16.2), which is located at least partially behind the socket (18). In order to ensure that a chisel holder (30) mounted in the base (10) remains securely fastened even under exceptionally high loads, according to the invention, the main body (13) has two clamping surfaces (18.5, 18.6) of a rear overload support section (18.4) in the insertion area that leads into the socket (18), each clamping surface (18.5, 18.6) facing a side of the main body (13).

The invention relates to an onboard mobile operation platform of a coal mining machine and a mounting structure of the onboard mobile operation platform on the coal mining machine, the mobile operation platform comprises a left platform, a right platform, a platform connecting assembly, a left side outer guide strip, a right side outer guide strip, a mobile oil cylinder and a supporting column, the lower portions of the left side and the right side of the supporting column are provided with a left side inner guiding structure and a right side inner guiding structure respectively, the left platform is in front-back sliding fit with the left side outer guiding strip and the left side inner guiding structure, the right platform is in front-back sliding fit with the right side inner guiding structure and the right side outer guiding strip, and the rear end of the left platform and the rear end of the right platform are connected together through a platform connecting assembly. The front end and the rear end of the movable oil cylinder are hinged to the supporting column and the platform connecting assembly respectively. The installation structure comprises the mobile operation platform and a machine top of the coal mining machine, the left and right side outer guide strips and the supporting columns are detachably and fixedly installed on the machine top, and an operation space is formed between the left and right platforms and a top protection plate. An installation foundation and a flexible operation space can be provided for the drilling machine.

The present invention provides a roller cutter rock tunnel boring machine, which relates to the field of tunnel boring machines. The roller cutter rock tunnel boring machine provided by the present invention includes a vehicle body, a traveling mechanism, a cutting device, a transport mechanism, and a loading mechanism. The traveling mechanism is arranged on the vehicle body to drive the vehicle body forward through the traveling mechanism. The cutting device includes a mounting seat, a drive unit, and a cutter disc. The mounting seat is movably connected to the front end of the vehicle body. The drive unit is arranged on the mounting seat. The cutter disc is transmission-connected to the drive unit to drive the cutter disc to rotate through the drive unit. The outer periphery of the cutter disc is provided with a plurality of roller cutters for cutting rock and soil. The transport mechanism is arranged on the vehicle body. The loading mechanism is arranged at the front end of the transport mechanism, and the loading mechanism is located below the cutting device. The loading mechanism is configured to transport the rock and soil cut by the cutting device to the transport mechanism. The transport mechanism is configured to transport the rock and soil to the rear of the tunnel boring machine. The present invention provides a roller cutter rock tunnel boring machine with high cutting efficiency and low cost.