234results about "Driving means" patented technology

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 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 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 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 application discloses a rock drill and a control system thereof. The control system is used for controlling a drill bit of the rock drill. The control system comprises an impact oil cylinder, a propelling oil cylinder, an impact control valve, a propelling sensor and a controller. The controller is electrically connected to the propelling sensor. The impact control valve is hydraulically connected to the impact oil cylinder. The controller is electrically connected to the impact control valve to obtain a flow of an oil circuit of the impact oil cylinder which is matched with a pressure of an oil circuit of the propelling oil cylinder when the pressure of the oil circuit of the propelling oil cylinder detected by the propelling sensor changes. The rock drill and the control system thereof have the beneficial effect that the impact frequency of the impact oil cylinder is matched with the pressure of the oil circuit of the propelling oil cylinder.

The invention belongs to the technical field of mining height measurement, and discloses a coal machine rocker arm mining height calculation system and method.The coal machine rocker arm mining height calculation system comprises a coal machine body, a coal machine rocker arm, a roller, an IMU sensor and an air pressure sensor, one end of the coal machine rocker arm is hinged to the coal machine body, and the other end of the coal machine rocker arm is in rolling connection with the roller; the IMU sensor is mounted on the side wall of one end, close to the coal machine main body, of the coal machine rocker arm; an air pressure sensor is mounted on the side wall of one end, close to the roller, of the coal machine rocker arm; the IMU sensor and the air pressure sensor are both connected with a calculation unit, and after data output by the IMU sensor and the air pressure sensor are processed through the calculation unit, mining height data are output. According to the technical scheme, more accurate, low-cost and stable measurement of the mining height of the coal mining machine can be realized.

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 present application discloses a drill arm control method, electronic equipment, storage medium, drilling rig and device, the method comprising: obtaining DH parameters of multiple motion joints; establishing a first DH parameter model of the drill arm based on the DH parameters of the multiple motion joints; obtaining a posture transformation matrix of a target point; solving the first DH parameter model according to the posture transformation matrix of the target point to obtain a horizontal movement distance of the telescopic arm of the first motion joint; calculating the gap of the first motion joint according to the horizontal movement distance; correcting the DH parameters of the motion joint adjacent to the first motion joint using the horizontal movement distance and the gap; establishing a second DH parameter model based on the DH parameters of multiple second motion joints; solving the second DH parameter model according to the posture transformation matrix of the target point to obtain control quantities of multiple second motion joints, and the control quantities of the second motion joints are used to control the second motion joints of the drill arm.

The utility model discloses mining tunneling equipment. The mining tunneling equipment comprises a machine head, wherein a tunneling head coarse adjustment angle adjusting mechanism is arranged on one side of the machine head; the heading head coarse adjustment angle adjusting mechanism comprises a sliding rail fixedly arranged at the top of one side of the machine head, a pulley is arranged in the sliding rail in a sliding mode, a rotating plate is arranged at one end of the pulley in a rotating mode, and one end of one side of the rotating plate is fixedly connected with the top of one side of the transverse frame plate through a connecting column. The heading head can be quickly rotated to the target approximate direction in the rough adjustment stage, and time is saved; in the fine adjustment stage, accurate control can be carried out on the basis of approaching a target angle, the operation efficiency is improved, and the equipment ensures large-angle rapid adjustment, realizes high-precision micro angle correction, is particularly suitable for occasions with high requirements on the attitude of the heading head, and has remarkable advantages in operation in a complex geological environment.

The utility model relates to an auxiliary supporting device of a cantilever type cutting part, and belongs to the technical field of auxiliary equipment of coal mining machines. Comprising supporting legs and a supporting seat, the supporting legs and the supporting seat are integrally formed, the supporting legs are used for being connected with a cutting part, and the bottom of the supporting seat is arc-shaped. And the cutting part and the traction part are respectively connected through a rotary pin shaft and an oil cylinder. The arc center of the arc coincides with the axis of the rotary pin shaft. And when the oil cylinder controls the cutting part to move, the cutting part rotates by taking the rotary pin shaft as a fulcrum, the supporting seat is always in contact with the ground in the moving process of the cutting part, and the supporting seat provides support for the cutting part. The stable operation of the cutting part is ensured when the height is adjusted under the driving of the oil cylinder, and meanwhile, the stress of the rotary pin shaft is reduced, so that the efficiency and the safety of coal mining work are improved.

The invention aims to provide a mining process for recovering section coal pillars in a double-wing retreating type continuous mining and continuous filling mode, and belongs to the technical field of coal mining. Coal pillar resources of a working face section are completely recovered through three process steps of branch roadway tunneling, mining chamber stoping and lagging filling, coal resources are avoided, and the mining efficiency is improved. Especially, resource loss caused by scarce high-quality coal resources due to the fact that section coal pillars cannot be recycled is avoided, and the resource recycling rate is increased.

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.

The invention relates to the field of mine quarrying equipment, and discloses a cutting mechanical arm which comprises a mechanical arm body, a mechanical arm driving assembly, a rotating mechanism and a cutting mechanism. The cutting mechanism is connected with one end of the mechanical arm body through the rotating mechanism, and the rotating mechanism drives the cutting mechanism to rotate and adjust. The mechanical arm driving assembly is hinged to the middle of the mechanical arm body, and the mechanical arm driving assembly drives the mechanical arm body to drive the cutting mechanism to ascend or descend. The cutting mechanical arm has the advantages that the whole cutting mechanical arm is simple in structure, the complexity of the whole structure can be reduced, and therefore the cost is reduced; it can be guaranteed that the two independent cutting modules of the cutting mechanism can cut mine stone in the vertical state, and the cutting effect is guaranteed.

The invention relates to a slippage type cutting system of a coal mining machine, which comprises a slippage part, a non-slippage part and a slippage oil cylinder, the slippage part and the non-slippage part are in sliding connection left and right through the matching of a guide chute and a guide slide rail, and the two ends of the slippage oil cylinder are respectively hinged on the slippage part and the non-slippage part; an upper row of supporting oil cylinders and a lower row of supporting oil cylinders are further arranged at the outer end of the non-sliding part, each row of supporting oil cylinders are arranged at intervals in the front-back direction, and when the sliding part moves to the front position or the rear position relative to the non-sliding part, piston rods of the upper row of supporting oil cylinders and the lower row of supporting oil cylinders located on the front portion or the rear portion extend to the sliding part and abut against the guide sliding rails. The piston rod retracts to break away from the sliding part. When the device is applied to the mining and drilling all-in-one machine, the conveyor can be normally pushed in each coal mining stroke, a passing space does not need to be reserved for a roller which stops in the drilling operation, the gas drilling drainage operation of a working face is greatly facilitated, and the mining efficiency of the mining and drilling all-in-one machine is improved.

The application discloses a short-body fully-mechanized excavator for coal mine tunneling, which comprises a rack, a walking part, a shovel plate part, a cutting part and a conveyer scraper; the rack is connected with the track assembly of the walking part through a rotating mechanism; the cutting part comprises a folding cutting arm and a transverse shaft type cutting head; one end of the cutting arm is hinged to the rack, and the other end of the cutting arm is fixed with the cutting head; the shovel plate part is connected to the front end of the rack; one conveyer scraper passes through and is arranged on the track assembly; the front end and the tail end of the conveyer scraper extend to the front end of the rack and the tail end of the rack respectively. Advantages: the body is greatly reduced compared with the conventional machine type, and is suitable for narrow lane, sharp turning, continuous mining and continuous charging working face branch lane frequent opening scene; through the adjustment of the coal conveying direction of the conveyer scraper, the rack rotation and the linkage of the cutting arm, the rapid opening operation and continuous transportation of the lane are realized, and the construction efficiency is greatly improved.

The invention belongs to the technical field of mining equipment, and discloses a power crushing system of a thin seam mining machine, which comprises a duplex gear pump driven by a motor and comprising a first gear pump and a second gear pump, an oil tank is connected to the first gear pump and the second gear pump, an oil outlet of the first gear pump is connected to a hydraulic unit and a crushing device driving unit, and an oil outlet of the second gear pump is connected to a hydraulic unit; an oil outlet of the second gear pump is connected into the power crushing loop; the power crushing loop comprises a crushing electromagnetic valve, a crushing main control valve and a power crushing device which are connected in sequence, the power crushing device is mounted on a rocker arm of the coal mining machine in the reverse coal flow direction, and the second gear pump is connected with the crushing electromagnetic valve; the crushing device driving unit comprises an electromagnetic reversing valve, a manual-hydraulic reversing valve, a one-way throttle valve, a hydraulic lock and a crushing device oil cylinder which are connected in sequence, and the crushing device oil cylinder is used for driving the power crushing device to swing up and down. Through the innovative design of the hydraulic system of the coal mining machine, the crushing capacity of the crushing device can be effectively improved.

The invention relates to a shearer loader for longwall mining, having a machine body (1) which is movable along a face conveyor (7) in the longitudinal direction (S) of the longwall by means of a drive device and having at least two drum arms (4) which are pivotally attached to the machine body (1) and at the free ends of each of which a cutting drum (5) is rotatably mounted, the machine body (1) having a support structure which is formed by a bracing of at least two support elements (3) in the longitudinal direction (S) of the longwall, and the machine body (1) comprising functional units (2). The aim of the invention is to further develop the shearer loader in such a way that the structural design of the machine body (1) allows larger dimensions of the shearer loader in order to work face thicknesses of 10 m and more. According to the invention, this is achieved in that the support elements (3) are designed as frame elements (8), each of which has an installation space (9) for the functional units (2).

The application discloses a kind of permanent magnet synchronous motor electric shovel speed regulation system and motor control method, belong to mining equipment technical field, including: main transformer, rectification feedback unit, several permanent magnet synchronous motors, several frequency converters and voltage suppressor, by using permanent magnet synchronous motor as power source, the efficiency and power factor of motor in low speed area are higher, realize efficient, energy-saving green mining, electric shovel each mechanism can also adopt direct drive or half direct drive mode, reduce mechanism transmission series, further improve transmission efficiency and equipment reliability;Since the rotor of permanent magnet synchronous motor is permanent magnet, when the frequency converter fails and the brake fails at the same time, the motor will generate back electromotive force when being pulled by potential energy load, according to the power generation characteristics of permanent magnet synchronous motor, the stator is short-circuited through energy consumption device, which will generate braking torque in permanent magnet synchronous motor, so as to brake the bucket, avoid the bucket falling rapidly, electric shovel out of control accident.

The invention relates to the technical field of rocker arms of coal mining machines, and discloses an energy-saving rocker arm structure of a coal mining machine, which comprises a shattering device, a supporting device, a coal mining device, an oil injection device, an antifriction device and a transmission assembly, the oil injection device is meshed with the second clutch disc through clutch teeth, the clutch teeth can stretch out an oil seepage assembly in the second clutch disc forwards, so that a three-way outlet in an oil seepage sliding strip is exposed, then when the first clutch disc drives the second clutch disc to rotate, lubricating oil in the second clutch disc flows out to the three-way outlet along an oil seepage groove, and then the oil seepage assembly is separated from the oil seepage sliding strip. Therefore, the automatic oil throwing function is realized. According to the shattering device, the grinding function is achieved by making contact with the surface of a coal seam through a grinding roller, then the grinding roller can drive a shattering rotary disc to rotate, the shattering rotary disc drives the front end of a shattering lever to tilt up through a shattering rotary handle, and when the shattering rotary handle is disengaged from the shattering lever, a shattering spring drives the front end of the shattering lever to smash downwards; and the conical hammer pounds the surface of the coal seam to realize preliminary loosening of the coal seam.

The invention provides a cutting speed regulation device for a two-speed motor coal mining machine and the two-speed motor coal mining machine, the coal mining machine comprises a two-speed motor used for driving a cutting roller to rotate, the cutting speed regulation device comprises an isolation switch, a power supply, a power supply, a power supply, a power supply, a power supply, a power supply, a power supply and a power supply control device, and the isolation switch is connected to a main power supply through a wire inlet device of the coal mining machine; and the two contactors are respectively connected between the isolating switch and the high-speed winding and the low-speed winding of the double-speed motor, and the double-speed motor is controlled to operate at a low gear or a high gear by switching the on-off states of the contactors. The speed regulation of the roller is realized by using the two contactors and the two-speed motor, the structure is relatively simple, and compared with a cutting variable-frequency speed regulation scheme, the cost is low, and the reliability is high; even if one contactor is damaged, the other contactor can be applied to operate in a single-speed mode, and the reliability is higher.

The utility model relates to the technical field of coal mine mining pressure prevention and control, in particular to a coal mine fully mechanized coal mining face suspended roof cutting device which comprises an installation bin, a cutting wheel and a clamping unit, and the clamping unit comprises a fixing base, a clamping plate shaft, a square column, a square bin, a rotating shaft, an installation frame, an air cylinder, a rotating base, a power assembly and a lifting assembly. The clamping plate penetrates through the square column to make contact with the clamping plate shaft, the controller is clicked to start the air cylinder, the air cylinder abuts against the rotating base to be close to the rotating shaft till the square column and the square column are matched, at the moment, the rotating base plays a role in abutting against the rotating shaft and can also be matched with the cutting wheel to rotate, and the dismounting mode is opposite to the mounting mode; and the lifting assembly is used for adjusting the height of the mounting bin, so that the cutting wheel is quickly mounted in this way, the time consumed for mounting the cutting wheel is shortened, the workload of workers is reduced, and the working efficiency of the workers is improved.

The invention discloses a coal mining machine and a rocker arm transmission device and a rocker arm transmission method thereof, and belongs to the technical field of coal mining machines, the rocker arm transmission device comprises a rocker arm shell, a first shell arranged at the bottom of one end of the rocker arm shell, a second shell arranged at the top of the other end of the rocker arm shell, and a control unit arranged in the coal mining machine, a first chain wheel is arranged in one end of the rocker arm shell, a second chain wheel is arranged in the other end of the rocker arm shell, a transmission chain is arranged between the first chain wheel and the second chain wheel, and the transmission chain is connected to the periphery of the first chain wheel and the periphery of the second chain wheel in a meshed mode and arranged in the rocker arm shell. The permanent magnet motor is adopted to replace a traditional asynchronous motor, a straight tooth transmission gear is omitted, the mechanical transmission distance is shortened, the problem that a traditional rocker arm is poor in lubricating, cooling and cutting capacity and electricity-saving performance is solved, the mechanical fault rate of a system is reduced, the production efficiency is further improved, and due to the fact that the permanent magnet motor is simple in structure, the inner structure of the rocker arm is simplified. And the maintenance complexity is reduced.

The application discloses a multifunctional tunneling machine, which comprises a rack body, walking mechanisms arranged on both sides of the rack body, a rack assembly, a telescopic mechanism arranged above the rack assembly, a slide arranged above the rack assembly, a slide rail arranged on the slide, a telescopic pushing oil cylinder arranged between the rear end of the slide rail and the rack assembly, a rotary support fixedly connected to the slide rail, a rotary ear frame arranged on the rotary support and capable of rotating around the axis of the rotary support, a cutting mechanism connected to the rotary ear frame and capable of swinging up and down, and a full-width loading mechanism arranged in front of the rack assembly and used for collecting materials. The whole telescopic mechanism has a large bearing area and is capable of resisting impact. The full-width loading mechanism realizes full-width loading, reduces the frequent adjustment of the whole machine during loading, and improves the loading efficiency.

The invention provides a mining strength control device. The mining strength control device comprises a shell; the drill bit part is arranged at one end of the shell; the pushing part is arranged at the other end of the shell; the first rotating part and the second rotating part are both mounted in the shell and are respectively connected with the drill bit part and the pushing part; the sliding table is mounted on the shell in a sliding manner; the driving part is mounted on the sliding table; the first transmission part and the second transmission part are both connected with the driving part, and the first transmission part and the second transmission part are both in transmission connection with the driving part; when the stress is low, the mining speed is increased, a rapid propelling mode is adopted, the coal seam exposure time is shortened, stress accumulation is reduced, and when the stress is too large, the mining speed is reduced, the working resistance of the support is increased, and sudden stress rising is avoided.

The application provides a cutting height adjustable isohypse thin coal seam shearer, and belongs to the technical field of coal mining equipment. The shearer comprises a coal wall side shoe assembly I, a coal wall side shoe assembly II, a mined-out side shoe assembly I, a mined-out side shoe assembly II, a shearer body, a height adjusting oil cylinder, a filling oil cylinder and a cutting drum. Four corners of the lower part of the shearer body are respectively provided with a coal wall side shoe installation position I and a coal wall side shoe installation position II facing the coal wall side, and a mined-out side shoe installation position I and a mined-out side shoe installation position II facing the mined-out side. The coal wall side shoe assembly I, the coal wall side shoe assembly II, the mined-out side shoe assembly I and the mined-out side shoe assembly II are respectively installed on the coal wall side shoe installation position I, the coal wall side shoe installation position II, the mined-out side shoe installation position I and the mined-out side shoe installation position II. The application can realize the overall height adjustment of the isohypse thin coal seam shearer and the height adjustment during the cutting along the working face (strike) and the vertical working face (dip).

The utility model relates to a high-stability drill carriage for a coal mine, which comprises a main machine body, a working mechanism, a front lower support component, a double-upright upper support component, a rear upper support oil cylinder, a rear lower support oil cylinder and a crawler walking device, a double-stand-column upper supporting assembly, a temporary operation table, a rear upper supporting oil cylinder, a hydraulic device, an auxiliary oil tank and a machine body operation table are arranged on the installation plate. The front end of the main machine body is connected with a front lower supporting assembly, and the rear end of the main machine body is connected with a rear lower supporting oil cylinder. The working mechanism comprises a sliding frame assembly, a power head and a clamping device, and the sliding frame assembly is connected with the double-stand-column upper supporting assembly through a rotary speed reducer. According to the whole drill carriage, through the front lower supporting assembly, the double-stand-column upper supporting assembly, the rear upper supporting oil cylinder and the rear lower supporting oil cylinder, all-directional supporting and stabilizing are carried out when the drill carriage drills, meanwhile, the drill carriage can stretch and retract according to the field environment, and applicability is high.

The application provides a drilling and slotting integrated device and method for hydraulic fracturing, relates to the technical field of coal mining, and is used for drilling or slotting under the action of a power mechanism and comprises a body, a drill bit, a cutting tool body and a driving piece. The body is provided with a cutting tool body storage part, and an opening part for the blade part of the cutting tool body to extend out of the body is arranged on the body at a position corresponding to the cutting tool body storage part; the drill bit is arranged on the body and is provided with a cutting end for drilling; the cutting tool body is arranged in the cutting tool body storage part and is provided with a blade part for slotting the side wall of the hole drilled by the drill bit; and the driving piece is connected with the cutting tool body to drive the cutting tool body to move so that the blade part of the cutting tool body extends out of the body from the opening part. The integrated device can complete the drilling process and the slotting process at one time without changing the original drilling process, is convenient to use, reliable in performance, and reduces the working intensity of the on-site construction personnel.