CN211692459U - Quick-dismantling variable-diameter wet-type cutting head assembly and cutting tooth dismantling tool thereof - Google Patents
Quick-dismantling variable-diameter wet-type cutting head assembly and cutting tooth dismantling tool thereof Download PDFInfo
- Publication number
- CN211692459U CN211692459U CN202020259192.9U CN202020259192U CN211692459U CN 211692459 U CN211692459 U CN 211692459U CN 202020259192 U CN202020259192 U CN 202020259192U CN 211692459 U CN211692459 U CN 211692459U
- Authority
- CN
- China
- Prior art keywords
- tooth
- cutting
- pick
- conical
- dust fall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 225
- 239000000428 dust Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000005452 bending Methods 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 20
- 238000009826 distribution Methods 0.000 claims abstract description 18
- 238000003780 insertion Methods 0.000 claims abstract description 13
- 230000037431 insertion Effects 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 3
- 239000002893 slag Substances 0.000 claims description 14
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 239000000956 alloy Substances 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 13
- 210000000078 claw Anatomy 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 4
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 31
- 238000005065 mining Methods 0.000 abstract description 9
- 239000011435 rock Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000001629 suppression Effects 0.000 description 5
- 230000036346 tooth eruption Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The utility model provides a quick-dismantling variable-diameter wet-type cutting head assembly and a cutting tooth dismantling tool thereof, belonging to the technical field of cutting device accessories of coal mining machinery, comprising a cutting head assembly and a cutting tooth dismantling tool; the cutting head assembly comprises a conical cutting pick, a conical tooth holder, a dust fall connecting seat, a fixing block and a water storage type cutting head matrix; the conical cutting pick comprises a tooth handle, a tooth shoulder, a tooth bar and a conical part; the bevel gear seat is provided with a mounting hole, and the lower part of the bevel gear seat is provided with a quick tenon; the dust fall connecting seat is provided with an insertion groove, the bottom surface of the dust fall connecting seat is provided with a water distribution interface, the rear part of the dust fall connecting seat is provided with a dust fall nozzle, and a built-in water channel is arranged inside the dust fall connecting seat; the fixed block seals the insertion groove; a pick removal tool includes a pick removal sleeve. Above-mentioned quick detach formula variable diameter wet-type cutterhead assembly and pick extracting tool thereof can improve the self-sharpening nature of pick, increases pick bending resistance, realizes that toothholder and cutterhead can dismantle and be connected, has the dust fall function simultaneously, is furnished with dedicated pick extracting tool.
Description
Technical Field
The utility model belongs to the technical field of colliery excavating machinery cutting device accessory, specifically disclose a quick detach formula variable diameter wet-type cutterhead assembly and pick extracting tool thereof.
Background
The cutting head is a core working unit for crushing coal rocks by the coal mine tunneling machine. When the cutting device of the coal mining machine moves up and down or left and right, the sectional area of the cutting drum sweeping the coal rock determines the production efficiency of the coal mining vehicle, so that the working efficiency of the mining vehicle can be effectively improved by adopting the large-diameter cutting drum under the condition that the cutting and rock breaking power of the mining machine is not changed and under the condition that the hardness of all coal is low; for the geological conditions of rocks with higher hardness, a cutting head with smaller diameter is needed to improve the rock breaking capacity of the mining machine. However, due to the limitations of downhole geological conditions and roadway equipment layout, changing the cutter head for a mining machine will result in a certain amount of downtime for maintenance, and in downhole situations where the conditions of cutter head transport, lifting and installation are limited, changing the cutter head will consume a significant amount of time and labor costs.
The cutting head mainly comprises a cutting head body with a welding structure, a tooth holder welded on the cutting head body and cutting teeth arranged in a tooth holder mounting hole. In the course of rock excavation after coal mining, there is often a significant wear phenomenon associated with the cutting pick and the holder. When the abrasion occurs on the cutting pick, the cutting pick can be taken out of the mounting hole of the cutting block and replaced by a new cutting pick. However, when the toothholder is worn, the toothholder cannot be replaced because the toothholder and the cutter head body are welded into a whole, and the cutter head has to be lifted for maintenance. In order to avoid the damage of the toothholder, the cutting head cannot be normally used due to the damage, the toothholder can be reliably connected to the surface of the cutting head, and can be detachably and mechanically connected with the toothholder, so that the toothholder can be dismounted, mounted and replaced without welding in a coal mine. In addition, due to the fact that the cutting teeth are in periodic contact with and separated from the coal rocks, the impact phenomenon is obvious, and a large amount of dust is generated, the dust is diffused in a closed roadway, the dust concentration in the roadway is increased, the visibility is reduced, the continuity of work and the health of workers are affected, and therefore dust falling treatment is very necessary.
The cutting pick is mounted in the mounting hole of the pick holder and can freely rotate around the axis in the mounting hole. In the working process of the heading machine, the cutting teeth directly contact with the coal body and the rock body, the time is accumulated at any time, the circumferential surface of the conical part of the cutting tooth holder rod is uniformly abraded, and the cutting tooth needs to be replaced by a new cutting tooth until the length of the holder rod is shortened to be unusable due to abrasion. Some existing cutting picks adopt a mode of reducing the angle of a conical part and coating a wear-resistant material to prolong the service life of the cutting pick, but the method actually manufactures the cutting pick into a combined structure of two materials, greatly weakens the bending resistance of a cutting pick rod, and influences the actual service life of the cutting pick. Due to the complex geological conditions of a coal mine, under the conditions that the hardness of coal and rock is high and certain abrasiveness is achieved, when the contact force between a cutting pick holder and a tooth holder mounting hole is increased and exceeds the critical friction between the cutting pick holder and the tooth holder mounting hole, the rotational freedom degree of a cutting pick in the mounting hole is limited, the cutting pick cannot rotate in the mutual contact process of the cutting pick and a coal body and a rock body, a certain area of a cutting pick rod in the circumferential direction is always in contact with the coal body or the rock body, and metal materials in the area are rapidly abraded to cause eccentric wear of the cutting pick. The strength of the cutting pick where pick-biased wear occurs will be further weakened, resulting in bending failure of the cutting pick as a whole. In addition, in order to reduce the resistance of the cutting tooth to cut into the coal body or the rock body, the front end taper of the cutting tooth holder is usually smaller, so that the cutting tooth is convenient to cut into the coal body or the rock body, but the wrapping performance of the less tapered holder on the hard alloy arranged at the top of the cutting tooth is poor, and after the metal material in the circumferential direction of the cutting tooth holder is abraded by a certain amount, the hard alloy is easy to fall off, so that the cutting tooth cannot effectively break rock. Therefore, on the premise of ensuring that the installation and use geometric dimension of the cutting pick are unchanged, the self-abrasion performance of the cutting pick is improved, the bending resistance of the cutting pick is increased, and the service life of the cutting pick can be effectively prolonged by having certain abrasion resistance.
Simultaneously, because pick and toothholder are the metal material, when the pick is relative rotation in the toothholder, pick shoulder terminal surface and toothholder terminal surface mutual contact, consequently under the frictional force effect, the contact surface can produce a large amount of frictional heat. Impact load is mainly applied to the contact surface, and under the action of vibration, impact and frictional heat, the excessively worn cutting pick is often bonded with the tooth holder, so that the cutting pick cannot rotate and further wear of the cutting pick is caused. After the hard alloy at the top of the cutting pick falls off, the metal of the cutting pick holder is seriously worn or even locally deformed, and finally the cutting pick cannot be detached from the tooth holder.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a quick detach formula becomes diameter wet-type cutterhead assembly and pick extracting tool thereof improves the self-sharpening nature of pick, increases pick bending resistance, realizes that toothholder and cutterhead can dismantle and be connected to realize the variable of cutterhead diameter, have the dust fall function simultaneously, and be furnished with dedicated pick extracting tool.
In order to achieve the purpose, the utility model provides a quick-release variable-diameter wet-type cutting head assembly and a cutting pick disassembling tool thereof, which comprises a cutting head assembly and a cutting pick disassembling tool; the cutting head assembly comprises a conical cutting pick, a conical tooth holder, a dust fall connecting seat, a fixing block and a water storage type cutting head matrix; the conical cutting pick comprises a tooth handle, a tooth shoulder, a tooth bar and a conical part which are integrally formed; the tooth handle and the tooth bar are both cylindrical structures; the tooth shoulder is in a round platform structure, the bottom surface of the tooth shoulder is connected with the tooth handle, and the top surface of the tooth shoulder is connected with the tooth bar through an annular transition curved surface; the conical part is positioned on the toothed bar, hard alloy is brazed at the top of the conical part, and a plurality of oval anti-bending beams are uniformly arranged on the circumferential surface of the conical part; the oval bending-resistant beam is arranged in a mode of small top and big bottom, the oval outline curve of the oval bending-resistant beam is controlled by a parameter equation (1),
wherein c is a number greater than 2;
a plurality of rotary disassembling grooves are formed in the tooth shoulders and the annular transition curved surface, and the rotary disassembling grooves and the oval bending-resistant beams are arranged in a staggered mode; the bevel gear tooth seat comprises a conventional tooth seat and a heightened tooth seat, is provided with a mounting hole matched with the tooth handle, and is provided with a quick tenon at the lower part; the height of the conventional tooth holder is a standard design height, and the heights of the heightened tooth holders are sequentially increased according to the R40 priority number series; the dust fall connecting seat is welded on the water storage type cutting head base body and is provided with an inserting groove matched with the quick inserting tenon, the bottom surface is provided with a water distribution interface, the rear part is provided with a dust fall nozzle, and a built-in water path communicated with the water distribution interface and the dust fall nozzle is arranged in the dust fall connecting seat; the fixing block is used for being fixed on the dust-settling connecting seat after the quick insertion tenon and the insertion groove are assembled, and closing an insertion hole of the insertion groove; a connecting end plate used for being connected with a cutting machine cantilever is arranged in the water storage type cutting head base body, a water inlet is formed in the connecting end plate, a water storage cavity is formed above the connecting end plate, a water distribution hole matched with the water distribution interface is formed in the cavity wall above the connecting end plate, a slag discharge hole is formed in the cavity wall below the connecting end plate, and a slag discharge plug is arranged in the slag discharge hole; the pick disassembling tool comprises a pick disassembling sleeve which is of a hollow cylindrical structure, and a disassembling claw corresponding to the rotary disassembling groove is arranged on the inner wall of the pick disassembling sleeve.
Furthermore, the contact area between the front surface of the bevel tooth holder and the cutting chips is a separating surface with an obtuse included angle; a wear-resistant material distributing block forming an acute angle with the horizontal direction is embedded on the separating surface; the wear-resistant distributing block is made of hard alloy.
Furthermore, the mounting hole of the bevel gear tooth seat comprises a first step hole, a second step hole and a third step hole, wherein the diameters of the first step hole, the second step hole and the third step hole are sequentially reduced from front to back; the first step hole and the second step hole are internally provided with a lining ring in interference fit, and the hardness of the lining ring is greater than that of the conical cutting pick; the tooth handle of the conical cutting tooth is inserted into the lining ring, and the tooth shoulder is abutted against the lining ring; the part of the tooth handle extending out of the mounting hole is provided with an annular clamping groove, and the annular clamping groove is matched with the shaft baffle ring for use.
Furthermore, the bottom surface of the tooth shoulder is provided with an annular concave shoulder; the lining ring is provided with a convex shoulder matched with the concave shoulder.
Furthermore, the convex shoulder is of a double-conical-surface annular structure, and the included angle between the conical surfaces on the inner side and the outer side and the horizontal plane is 120 degrees.
Furthermore, the fast tenon is a T-shaped tenon, the distance between the side positioning surfaces at two sides is gradually reduced from front to back, and the side positioning surfaces are in transitional connection with the back end surface through guide inclined surfaces; the inserting groove is matched with the fast inserting tenon.
Further, a fixed block mounting position is arranged on the dust fall connecting seat; the fixing block mounting position extends forwards from the insertion hole of the insertion groove and is provided with a fixing groove; the bottom surface of the fixed block is provided with a stop key matched with the fixed groove; the fixing groove and the stop key are both provided with screw holes, and the fixing screws penetrate through the screw holes to fix the fixing block on the fixing block mounting position.
Further, the side surface of the dust fall connecting seat corresponding to the fixing block mounting position is an anti-friction surface; the two sides of the fixed block are antifriction surfaces; the distance between the wear reducing surfaces on the two sides is gradually increased from front to back.
Further, the cutting pick disassembling tool also comprises an operating handle; the upper part of the cutting pick disassembling sleeve is of a hexagonal structure, the lower part of the cutting pick disassembling sleeve is of a cylindrical structure, and a conical transition structure is arranged between the hexagonal structure and the cylindrical structure; the hexagonal body structure is provided with a handle mounting hole for an operating handle to pass through.
Furthermore, the operating handle comprises an anti-drop connecting rod and a detachable spherical end; the anti-drop connecting rod is of a cylindrical rod-shaped structure, one end of the anti-drop connecting rod is a fixed spherical end, and the other end of the anti-drop connecting rod is in threaded connection with the detachable spherical end; the fixed spherical end and the detachable spherical end are provided with mounting grooves with inner hexagonal structures.
The utility model has the advantages that:
1. in the quick-dismantling variable-diameter wet-type cutting head assembly and the cutting pick disassembling tool thereof, the conical cutting picks are integrally formed by the same material without connecting seams, so that the separation phenomenon of different materials under the action of low-frequency large-amplitude impact load is avoided, and the use reliability of the cutting picks is improved;
2. the oval bending-resistant beams are uniformly distributed on the outer surface of the conical part, can effectively resist bending loads from different directions, so that the bending resistance of the conical cutting pick is improved, the working capacity of the cutting head is improved, the convex structure can effectively resist the abrasion of coal rocks to the conical part, and the service life of the conical cutting pick is prolonged;
3. the tooth shank of the conical cutting tooth is rotatably arranged in the mounting hole of the tooth holder of the conical cutting tooth and rotates in the working process, the conical cutting tooth can be efficiently cut into a coal body or rock, when the conical cutting tooth is cut into the coal body and rotates into a chip stack along with the rotation of the cutting head, the wall of the rotary dismounting groove is in unilateral contact with the coal body or the chips under the rotation action of the cutting head, the torque generated in the contact promotes the conical cutting tooth to rotate around the axis of the cutting tooth, after the previous rotary dismounting groove rotates out of a contact area, the next rotary dismounting groove is in continuous contact with the coal body or the chips, the conical cutting tooth is enabled to continuously rotate around the axis of the cutting tooth, and the self-rotation performance of the conical cutting tooth; because the conical cutting pick is of an integral structure, the tooth bar and the hard alloy brazed at the top end of the conical part also rotate along with the conical cutting pick, so that the conical cutting pick is self-abraded in the cutting and chip loading processes, and the service life of the cutting pick is prolonged; the rotary disassembly groove is arranged on the tooth shoulder and the annular transition curved surface, so that the weakening of the concave structure of the rotary disassembly groove on the local material of the tooth bar can be effectively avoided, and the overall strength of the conical cutting tooth is not reduced;
4. the quick tenon of the bevel gear seat is matched with the inserting groove of the dust fall connecting seat to realize quick disassembly and assembly; the fixing block is used for being fixed on the dust-settling connecting seat after the fast tenon and the inserting groove are assembled, and closing an inserting hole of the inserting groove, so that the reliable connection of the bevel-tooth toothholder and the dust-settling connecting seat is ensured, and the bevel-tooth toothholder is prevented from falling off in the cutting process; the change of the diameter of the cutting head is realized by replacing the conical tooth seats with different heights, the adaptability of the geometric dimension of the cutting drum to the change of geological conditions is improved, and meanwhile, the cost of personnel, transportation and installation time consumed by replacing the cutting head of the coal mining machine is reduced;
5. the dust suppression connecting seat is internally provided with a waterway system, so that water in a water storage cavity of the cutting head can be directly sprayed out from a dust suppression nozzle at the rear part of the dust suppression connecting seat without passing through the conical tooth holder, the purpose of dust suppression is achieved, adjacent conical cutting teeth arranged behind the conical cutting teeth can be cooled simultaneously, and the influence on a spraying system when the conical tooth holder is detached and replaced is reduced;
6. the cutting pick disassembling tool can effectively loosen the damaged conical cutting pick, so that the damaged cutting pick can be quickly disassembled; the connecting structure of the operating handle and the spherical end head is convenient for alternate rotation in the positive and negative directions, and loosening of the damaged cutting tooth relative to the tooth holder is convenient to realize; when the operating handle and the detachable spherical end are locked with each other, the internal hexagonal structure with the same specification is adopted, so that the selection and matching of locking tools used on site are facilitated; the hexagonal structure and the handle mounting hole structure on the upper part of the cutting pick disassembling sleeve provide different disassembling methods for disassembling the cutting pick in the coal mine; the separation of damaged pick and toothholder can effectively be realized fast to this instrument.
Drawings
FIG. 1 is an assembly view of the quick release variable diameter wet cutting head assembly and its pick removal tool provided by the present invention;
FIG. 2 is a cross-sectional view of the cutter head assembly (without the conical pick and the conical pick holder);
FIG. 3 is an exploded view of a conical pick, a conical pick holder, a dust fall connection holder and a fixing block;
FIG. 4 is another side view of the exploded view of FIG. 3;
FIG. 5 is a schematic view of a conical pick;
FIG. 6 is a schematic structural view of a bevel gear seat;
FIG. 7 is an assembly view of the conical pick and the conical pick block;
FIG. 8 is a comparison of a conventional block and an elevated block;
fig. 9 is a sectional view of the dust settling connecting seat and the fixing block;
fig. 10 is an assembly view of the bevel gear seat and the dust fall connecting seat;
FIG. 11 is a cross-sectional view taken in the direction of assembly A-A of FIG. 10;
FIG. 12 is a cross-sectional view taken in the direction of assembly B-B of FIG. 10;
FIG. 13 is a schematic view of a pick removal tool;
FIG. 14 is a cross-sectional view of a conical pick and pick remover in engagement.
In the figure: 1-a conical cutting pick; 1.1-tooth shank; 1.2-tooth shoulder; 1.3-toothed bar; 1.4-tapered section; 1.5-annular transition curved surface; 1.6-hard metal; 1.7-oval beam bending resistance; 1.8-rotationally detaching the groove; 1.9-ring slot; 1.10-concave shoulder; 2-a bevel gear tooth holder; 2 a-a conventional toothholder; 2 b-a heightened tooth holder; 2.1-mounting holes; 2.2-inserting tenon quickly; 2.3-separating surface; 2.4-wear resistant distributor block; 2.5-side locating surface; 2.6-guiding inclined plane; 3-dust fall connecting seat; 3.1-inserting grooves; 3.2-water distribution interface; 3.3-dust settling nozzle; 3.4-built-in waterway; 3.5-fixed groove; 3.6-welding the slope; 4, fixing blocks; 4.1-stop key; 5-a liner ring; 5.1-shoulder; 6-baffle ring for shaft; 7-a set screw; 8-a wear reducing surface; 9-water storage type cutting head base body; 9.1-connecting end plates; 9.2-water inlet; 9.3-water storage cavity; 9.4-water distribution hole; 9.5-slag discharging and blocking; 10-detaching the sleeve from the cutting pick; 10.1-removal of the claw; 10.2-inspection well; 11-an operating handle; 11.1-anti-drop connecting rod; 11.2-detachable spherical end; 11.3-mounting groove.
Detailed Description
The embodiment provides a quick-release variable-diameter wet-type cutting head assembly and a cutting pick disassembling tool thereof, and the quick-release variable-diameter wet-type cutting head assembly comprises a cutting head assembly and a cutting pick disassembling tool; the cutting head assembly comprises a conical cutting tooth 1, a conical tooth holder 2, a dust fall connecting seat 3, a fixing block 4 and a water storage type cutting head base body 9; the conical cutting pick 1 comprises a tooth handle 1.1, a tooth shoulder 1.2, a tooth bar 1.3 and a conical part 1.4 which are integrally formed; the tooth handle 1.1 and the tooth bar 1.3 are both cylindrical structures; the tooth shoulder 1.2 is in a circular truncated cone structure, the bottom surface of the tooth shoulder is connected with the tooth handle 1.1, and the top surface of the tooth shoulder is connected with the tooth bar 1.3 through an annular transition curved surface 1.5; the conical part 1.4 is positioned on the rack bar 1.3, the top of the conical part is brazed with hard alloy 1.6, and a plurality of oval anti-bending beams 1.7 are uniformly arranged on the circumferential surface; the oval bending-resistant beam 1.7 is arranged in a form of a small upper part and a big lower part, the oval profile curve of the oval bending-resistant beam 1.7 is controlled by a parameter equation (1),
wherein c is a number greater than 2;
a plurality of rotary dismounting grooves 1.8 are formed in a tooth shoulder 1.2 and an annular transition curved surface 1.5 of the conical cutting tooth 1, and the rotary dismounting grooves 1.8 and the oval bending-resistant beam 1.7 are arranged in a staggered mode; the bevel gear tooth holder 2 comprises a conventional tooth holder 2a and a heightened tooth holder 2b, which are both provided with mounting holes 2.1 matched with the tooth handle 1.1, and the lower part of the bevel gear tooth holder is provided with a quick tenon 2.2; the height of the conventional toothholder 2a is a standard design height; the heights of the heightened seats 2b are sequentially increased according to the priority number R40, for example, if the height of the conventional seat 2a is 145, the heights of the heightened seats 2b can be selected as follows: 153.7, 162.4, 171.1, 181.25, 191.4, 203, 217.5, 232, 246.5, 261, 275.5, 290; the dust fall connecting seat 3 is welded on a water storage type cutting head base body 9, an inserting groove 3.1 matched with the fast inserting tenon 2.2 is arranged on the dust fall connecting seat, a water distribution interface 3.2 is arranged on the bottom surface, a dust fall nozzle 3.3 is arranged on the rear portion, and a built-in water channel 3.4 communicated with the water distribution interface 3.2 and the dust fall nozzle 3.3 is arranged in the dust fall connecting seat; the fixing block 4 is used for being fixed on the dust-settling connecting seat 3 after the fast tenon 2.2 and the inserting groove 3.1 are assembled, and closing an inserting hole of the inserting groove 3.1; a connecting end plate 9.1 used for being connected with a cutting machine cantilever is arranged in the water storage type cutting head base body 9, a water inlet 9.2 is arranged on the connecting end plate 9.1, a water storage cavity 9.3 is arranged above the connecting end plate 9.1, a water distribution hole 9.4 matched with the water distribution interface 3.2 is arranged on the cavity wall above the connecting end plate 9.1, a slag discharge hole is arranged on the cavity wall below the connecting end plate 9.1, and a slag discharge plug 9.5 is arranged in the slag discharge hole; the cutting pick disassembling tool comprises a cutting pick disassembling sleeve 10, the cutting pick disassembling sleeve 10 is of a hollow cylindrical structure, and a disassembling claw 10.1 corresponding to the rotary disassembling groove 1.8 is arranged on the inner wall of the cutting pick disassembling sleeve.
In the quick-dismantling variable-diameter wet-type cutting head assembly and the cutting pick disassembling tool thereof, the conical cutting pick 1 is integrally formed by the same material without a connecting seam, so that the separation phenomenon of different materials under the action of low-frequency large-amplitude impact load is avoided, and the use reliability of the cutting pick is improved. The oval bending-resistant beams 1.7 are uniformly distributed on the outer surface of the conical part 1.4, can effectively resist bending loads from different directions, so that the bending-resistant capacity of the conical cutting pick 1 is increased, the working capacity of the cutting head 9 is improved, the convex structure can effectively resist the abrasion of coal rocks to the conical part 1.4, and the service life of the conical cutting pick 1 is prolonged. The tooth handle 1.1 of the conical cutting tooth 1 is rotatably arranged in the mounting hole 2.1 of the conical tooth holder 2 and rotates in the working process, so that coal or rock is efficiently cut into. When the conical cutting pick 1 is cut into the coal body and rotates along with the cutting head 9 to be turned into a cutting pile, the wall of the rotary detaching groove 1.8 is in unilateral contact with the coal body or the cutting under the rotating action of the cutting head 9, the torque generated in the contact promotes the conical cutting pick 1 to rotate around the axis of the cutting pick, after the previous rotary detaching groove 1.8 rotates out of the contact area, the next rotary detaching groove 1.8 is in continuous contact with the coal body or the cutting, the conical cutting pick 1 rotates around the axis of the cutting pick continuously, and the self-rotation performance of the conical cutting pick 1 is improved. Because the conical cutting pick 1 is of an integral structure, the tooth bar 1.3 and the hard alloy 1.6 brazed at the top end of the conical part 1.4 also rotate along with the tooth bar, so that the conical cutting pick 1 is self-abraded in the cutting and chip loading processes, and the service life of the cutting pick is prolonged. The rotary disassembly groove 1.8 is arranged on the tooth shoulder 1.2 and the annular transition curved surface 1.5, so that the weakening of the concave structure of the rotary disassembly groove 1.8 to the local material of the tooth bar 1.3 can be effectively avoided, and the overall strength of the conical cutting tooth 1 is not reduced. Fast tenon 2.2 of bevel gear toothholder 2 cooperates with dust fall connecting seat 3's cartridge groove 3.1, realizes quick assembly disassembly. Fixed block 4 is used for fixing on dust fall connecting seat 3 after fast tenon 2.2 and the assembly of cartridge groove 3.1, seals the inserted hole of cartridge groove 3.1, guarantees the reliable connection of awl tooth toothholder 2 and dust fall connecting seat 3, prevents that cutting in-process awl tooth toothholder 2 from droing. Dust fall connecting seat 3 embeds waterway system, can not pass through awl tooth toothholder 2 with the water in the water storage chamber 9.3, and direct dust fall nozzle 3.3 blowout from dust fall connecting seat 3 rear portion reaches the dust suppression purpose to can cool off arranging at this toper pick 1 hou mian adjacent toper pick 1 simultaneously. The slag discharging plug 9.5 seals the slag discharging hole when the cutting head or the cutting roller assembly works, and is taken out from the slag discharging hole when discharging slag. Dismantle sleeve 10 cover with the pick and establish on damaged pick, dismantle in the claw 10.1 inserts the groove 1.8 of tearing open soon of damaged pick, sleeve 10 is dismantled to rotatory pick, and the moment of torsion is through dismantling the groove 1.8 of tearing open soon that claw 10.1 transmitted, makes damaged pick dismantle sleeve 10 rotatory along with the pick in awl toothholder 2, can destroy the bonding of pick and toothholder, realizes the separation of damaged pick and awl toothholder 2. Furthermore, the diameter of the water distribution interface 3.2 is larger than that of the water distribution hole 9.4, so that water in the water storage cavity 9.3 can be conveyed to the dust fall nozzle 3.3 through the water distribution interface 3.2 and the built-in water channel 3.4 even if welding positioning or manufacturing errors exist, and finally sprayed out.
Further, the oval profile curves of adjacent oval bending resistant beams 1.7 are approximately parallel to each other by the control parameter c, so that the dismounting claw 10.1 on the cutting pick dismounting sleeve 10 can pass through the middle of the adjacent two oval bending resistant beams 1.7.
Further, the dust fall connecting seat 3 is welded on the surface of the water storage type cutting head base body 9 in a spiral line mode of 1, 2, 3, 4, 6 or 8 according to spiral line parameters of a cylinder, a cone, a sphere or a table. Cylindrical section helical line equation:
helical equation of conic section
Helical equation of sphere segment
In the above formula, the first and second carbon atoms are,R、pandQrespectively are the control radiuses of a cylinder, a cone and a sphere section spiral line,ψthe parameters are controlled for the cone structure,λthe angle of the spiral line is increased,θis a spiral line corner.
Furthermore, the outline of the water storage type cutting head base body 9 is a free combination of a cylinder, a cone, a sphere or a spherical table body, and can be a combination of a cylinder + a cone + a sphere, a cylinder + a cone + a spherical table body, a cone + a sphere, a cone + a spherical table body, a cylinder + a sphere, a cylinder + a spherical table body and the like.
Furthermore, the contact area of the front surface of the conical tooth base 2 and the cutting chips is a separation surface 2.3 with an obtuse included angle, so that the impact abrasion of the cutting chips and other abrasive materials on the tooth base can be effectively reduced when the cutting head rotates. The obtuse angle is based primarily on the angle of the cutting pick measured after wear in actual operation, and is typically not less than 90 ° and between 120 ° and 160 °. The smaller the obtuse angle, the smaller the resistance, the more significant the wear-inhibiting effect, and the better the use effect, without lowering the overall strength of the bevel-tooth carrier 2. The angle is schematically shown as 150.
Furthermore, a wear-resistant distributing block 2.4 forming an acute angle with the horizontal direction is embedded on the separating surface 2.3, so that the cutting chips are smoothly discharged along the moving direction of the bevel-tooth holder 2; the wear-resistant distributor block 2.4 is made of hard alloy. According to the design standard that when the cutting head cuts the rock, the linear velocity of the tooth tip (1.6 part of the hard alloy) does not exceed the cutting of the coal rock, and the reasonable range of the angle is 20-30 degrees. This angle is shown to be about 22.
Further, the mounting hole 2.1 of the bevel gear tooth base 2 comprises a first step hole, a second step hole and a third step hole, wherein the diameters of the first step hole, the second step hole and the third step hole are sequentially reduced from front to back; the first step hole and the second step hole are internally provided with the lining ring 5 in an interference fit mode, so that the first step hole and the second step hole form an integral structure, the reliability of connection of the conical tooth holder 2 and the lining ring 5 is improved, and the hardness of the lining ring 5 is greater than that of the conical cutting tooth 1; the shank 1.1 of the conical pick 1 is inserted into the bushing 5 and the shoulder 1.2 rests against the bushing 5. The lining ring 5 is made of high-wear-resistance alloy steel through heat treatment, when the conical cutting pick 1 rotates in the lining ring 5 to generate friction wear, the hardness of the lining ring 5 is higher than that of the conical cutting pick 1, so that the wear mainly occurs on the end face of the tooth shoulder 1.2 contacted with the lining ring 5, and when the hard alloy 1.6 at the top of the conical cutting pick 1 or the end face contacted with the lining ring 5 fails due to wear, the conical cutting pick 1 of the vulnerable part can be replaced.
Furthermore, the cutting head assembly also comprises a baffle ring 6 for the shaft; the part of the gear handle 1.1 extending out of the mounting hole 2.1 is provided with an annular clamping groove 1.9 matched with the baffle ring 6 for the shaft. The tooth handle 1.1 of the conical cutting tooth 1 is inserted into the mounting hole 2.1, and the shaft is clamped in the annular clamping groove 1.9 by the baffle ring 6 to fix the conical cutting tooth 1 in the conical tooth holder 2.
Further, the bottom surface of the tooth shoulder 1.2 is provided with an annular concave shoulder 1.10; the lining ring 5 is provided with a shoulder 5.1 which is matched with the concave shoulder 1.10. The tooth shoulder 1.2 and the lining ring 5 are buckled with each other through an annular conical surface, and the tooth shoulder 1.2 can freely rotate in the lining ring 5 and cannot be separated from the lining ring 5. Tooth shoulder 1.2 and backing ring 5 pass through annular conical surface and contact each other, from effective increase area of contact, reduce the contact specific pressure, reduce wearing and tearing, shoulder-concave shoulder lock structure can also play in addition and prevent that toper pick 1 from rocking because assembly gap or because toper pick 1 that the wearing and tearing of 1.1 cylindrical surface of toothholder lead to in mounting hole 2.1, can effectively stabilize toper pick 1 at the cutting in-process.
Furthermore, the convex shoulder 5.1 is of a double-conical-surface annular structure, the included angle between the conical surfaces on the inner side and the outer side and the horizontal plane is 120 degrees, normal phase loads acting on the conical cutting tooth 1 in the rock breaking process can be evenly distributed on the conical surfaces on the inner side and the outer side, so that the contact specific pressure of the convex shoulder 5.1 and the concave shoulder 1.10 is reduced, and the normal phase loads acting on the conical cutting tooth 1 in the rock breaking process are transferred to the conical tooth holder 2 through the lining ring 5 by the equilateral triangle formed in the force decomposition process.
Furthermore, the fast tenon 2.2 is a T-shaped tenon, the distance between the side positioning surfaces 2.5 at the two sides is gradually reduced from front to back, and the side positioning surfaces 2.5 are in transitional connection with the back end surface through guide inclined surfaces 2.6; the inserting groove 3.1 is matched with the fast tenon 2.2. The side positioning surface 2.5 and the guide inclined surface 2.6 of the fast tenon 2.2 can be fast inserted along the inserting groove 3.1, so that the automatic positioning of the inserting direction is realized. The included angle between the side positioning surfaces 2.5 at the two sides is a self-positioning angle.
Further, a fixing block mounting position is arranged on the dust fall connecting seat 3; the mounting position of the fixed block extends forwards from the insertion opening of the insertion groove 3.1 and is provided with a fixed groove 3.5; the bottom surface of the fixed block 4 is provided with a stop key 4.1 matched with the fixed groove 3.5; the fixing groove 3.5 and the stop key 4.1 are both provided with screw holes, and the fixing screw 7 penetrates through the screw holes to fix the fixing block 4 on a fixing block mounting position. The arrangement of the fixing groove 3.5 and the stop key 4.1 effectively prevents the fixing block 4 from being released from the fixing block mounting position.
Further, the side surface of the dust fall connecting seat 3 corresponding to the mounting position of the fixed block is an anti-friction surface 8; the two sides of the fixed block 4 are provided with antifriction surfaces 8; the distance between the two side abrasion reducing surfaces 8 is gradually increased from front to back, a right angle is formed in the movement direction of the dust fall connecting seat 3, and the rotary working resistance of the cutting head 9 is reduced.
Further, the bottom surface and the side of dust fall connecting seat 3 are in transition connection through the inward-inclined welding slope surface 3.6, and the dust fall connecting seat 3 can be welded to the surface of the cutting head 9 through the welding slope surface 3.6.
Further, the pick removal tool also includes an operating handle 11; the upper part of the cutting pick disassembling sleeve 10 is of a hexagonal structure, the lower part of the cutting pick disassembling sleeve is of a cylindrical structure, and a conical transition structure is arranged between the hexagonal structure and the cylindrical structure; the hexagonal body structure is provided with a handle mounting hole 10.3 for the operating handle 11 to pass through. The wall thickness of the lower part of the cutting pick disassembly sleeve 10 is small, and disassembly claws 1.1 structures with the same number as the disassembly grooves 1.8 are manufactured, and the structures are of stamping type concave shapes and are matched with the disassembly grooves 1.8 in shape. The hexagonal structure and the handle mounting hole 10.3 structure on the upper part of the cutting pick disassembly sleeve 10 provide different disassembly methods for disassembling cutting picks in the underground coal mine: firstly, the cutting pick disassembling sleeve 10 is rotated by using universal tools such as an open end wrench, a socket wrench and the like with specifications corresponding to the hexagonal structure; secondly, the operation handle 2 is used for driving the cutting pick disassembling sleeve 1 to rotate.
Further, the operating handle 11 comprises an anti-drop connecting rod 11.1 and a detachable spherical end 11.2; the anti-drop connecting rod 11.1 is a cylindrical rod-shaped structure, one end is a fixed spherical end, and the other end is in threaded connection with the detachable spherical end 11.2. The spherical ends at the two ends of the anti-falling connecting rod 11.1 are used for preventing the operating handle 11 from falling off in the disassembly process.
Furthermore, the mounting grooves 11.3 of the inner hexagonal structures are formed in the fixed spherical end and the detachable spherical end 11.2, so that the locking tool can be conveniently selected and used on site, and can also be used for dismounting and mounting parts such as fastening hexagon bolts and the like, and the function diversification is realized.
Further, an observation hole 10.2 is formed in the wall of the cutting pick disassembling sleeve 10, and the observation hole 10.2 is located above the disassembling claw 10.1. When the cutting tooth disassembly sleeve 10 is sleeved on a damaged cutting tooth for disassembly, whether the disassembly claw 10.1 is inserted into the rotary disassembly groove 1.8 or not can be observed through the observation hole 10.2.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A quick-release variable-diameter wet-type cutting head assembly and a cutting pick disassembling tool thereof are characterized by comprising the cutting head assembly and the cutting pick disassembling tool;
the cutting head assembly comprises a conical cutting pick, a conical tooth holder, a dust fall connecting seat, a fixing block and a water storage type cutting head matrix;
the conical cutting pick comprises a tooth handle, a tooth shoulder, a tooth bar and a conical part which are integrally formed;
the tooth handle and the tooth bar are both cylindrical structures;
the tooth shoulder is of a circular truncated cone structure, the bottom surface of the tooth shoulder is connected with the tooth handle, and the top surface of the tooth shoulder is connected with the tooth rod through an annular transition curved surface;
the conical part is positioned on the toothed bar, hard alloy is brazed at the top of the conical part, and a plurality of oval anti-bending beams are uniformly arranged on the circumferential surface of the conical part;
the oval bending-resistant beam is arranged in a mode of small top and big bottom, the oval outline curve of the oval bending-resistant beam is controlled by a parameter equation (1),
wherein c is a number greater than 2;
a plurality of rotary disassembling grooves are formed in the tooth shoulders and the annular transition curved surface, and the rotary disassembling grooves and the oval bending-resistant beams are arranged in a staggered mode;
the bevel gear tooth holder comprises a conventional tooth holder and a heightened tooth holder, mounting holes matched with the tooth handle are formed in the conventional tooth holder and the heightened tooth holder, and a quick tenon is arranged at the lower part of the conventional tooth holder;
the height of the conventional tooth holder is a standard design height;
the heights of the heightened tooth seats are sequentially increased according to the priority number series of R40;
the dust fall connecting seat is welded on the base body of the water storage type cutting head and is provided with an inserting groove matched with the quick inserting tenon, the bottom surface of the dust fall connecting seat is provided with a water distribution interface, the rear part of the dust fall connecting seat is provided with a dust fall nozzle, and a built-in water path communicated with the water distribution interface and the dust fall nozzle is arranged in the dust fall connecting seat; the fixed block is used for being fixed on the dust-settling connecting seat after the fast inserting tenon and the inserting groove are assembled, and closing an inserting hole of the inserting groove;
a connecting end plate used for being connected with a cutting machine cantilever is arranged in the water storage type cutting head base body, a water inlet is formed in the connecting end plate, a water storage cavity is formed above the connecting end plate, a water distribution hole matched with the water distribution interface is formed in the cavity wall above the connecting end plate, a slag discharge hole is formed in the cavity wall below the connecting end plate, and a slag discharge plug is arranged in the slag discharge hole;
the pick disassembling tool comprises a pick disassembling sleeve which is of a hollow cylindrical structure, and a disassembling claw corresponding to the rotary disassembling groove is arranged on the inner wall of the pick disassembling sleeve.
2. The quick release type variable diameter wet cutting head assembly and the cutting pick disassembling tool thereof according to claim 1, characterized in that the contact area of the front face of the conical tooth holder and the cutting bits is a separating surface with an obtuse included angle;
a wear-resistant material distributing block forming an acute angle with the horizontal direction is embedded on the separating surface;
the wear-resistant distributing block is made of hard alloy.
3. The quick release type variable diameter wet cutting head assembly and the cutting pick disassembling tool thereof according to claim 2, characterized in that the mounting hole of the conical tooth holder comprises a first step hole, a second step hole and a third step hole which are sequentially reduced from the front to the back radius;
the first step hole and the second step hole are internally provided with a lining ring in interference fit, and the hardness of the lining ring is greater than that of the conical cutting pick;
the tooth handle of the conical cutting pick is inserted into the lining ring, and the tooth shoulder is abutted against the lining ring;
the part of the tooth handle extending out of the mounting hole is provided with an annular clamping groove, and the annular clamping groove is matched with the shaft baffle ring for use.
4. The quick release type variable diameter wet cutting head assembly and the cutting pick disassembling tool thereof according to claim 3, characterized in that the bottom surface of the tooth shoulder is provided with an annular concave shoulder;
and a convex shoulder matched with the concave shoulder is arranged on the lining ring.
5. The quick release type variable diameter wet cutting head assembly and the pick removing tool thereof according to claim 4, wherein the shoulder has a double-conical ring structure, and the included angle between the conical surfaces at the inner side and the outer side and the horizontal plane is 120 °.
6. The quick release type diameter-variable wet cutting head assembly and the cutting pick disassembling tool thereof according to claim 1, wherein the quick insertion tenon is a T-shaped tenon, the distance between the side positioning surfaces at two sides is gradually reduced from front to back, and the side positioning surfaces are in transitional connection with the back end surface through a guide inclined surface;
the inserting groove is matched with the quick inserting tenon.
7. The quick-release variable-diameter wet cutting head assembly and the cutting pick disassembling tool thereof according to claim 6, wherein the dust fall connecting seat is provided with a fixing block mounting position;
the fixing block mounting position extends forwards from the insertion hole of the insertion groove and is provided with a fixing groove;
the bottom surface of the fixed block is provided with a stop key matched with the fixed groove;
the fixing groove and the stop key are both provided with screw holes, and the fixing screws penetrate through the screw holes to fix the fixing block on the fixing block mounting position.
8. The quick release type variable diameter wet cutting head assembly and the pick disassembling tool thereof according to claim 7, wherein the side surface of the dust fall connecting seat corresponding to the mounting position of the fixed block is an anti-friction surface;
two sides of the fixed block are antifriction surfaces;
the distance between the wear reducing surfaces on the two sides is gradually increased from front to back.
9. The quick release variable diameter wet cutter head assembly and pick removal tool thereof of claim 1, wherein the pick removal tool further comprises an operating handle;
the upper part of the cutting pick disassembling sleeve is of a hexagonal structure, the lower part of the cutting pick disassembling sleeve is of a cylindrical structure, and a conical transition structure is arranged between the hexagonal structure and the cylindrical structure;
the hexagonal body structure is provided with a handle mounting hole for an operating handle to pass through.
10. The quick release variable diameter wet cutter head assembly and pick removal tool of claim 9, wherein the operating handle includes a drop-off prevention link and a removable spherical head;
the anti-drop connecting rod is of a cylindrical rod-shaped structure, one end of the anti-drop connecting rod is a fixed spherical end, and the other end of the anti-drop connecting rod is in threaded connection with the detachable spherical end;
the fixed spherical end and the detachable spherical end are provided with mounting grooves with inner hexagonal structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020259192.9U CN211692459U (en) | 2020-03-05 | 2020-03-05 | Quick-dismantling variable-diameter wet-type cutting head assembly and cutting tooth dismantling tool thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020259192.9U CN211692459U (en) | 2020-03-05 | 2020-03-05 | Quick-dismantling variable-diameter wet-type cutting head assembly and cutting tooth dismantling tool thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211692459U true CN211692459U (en) | 2020-10-16 |
Family
ID=72778077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020259192.9U Active CN211692459U (en) | 2020-03-05 | 2020-03-05 | Quick-dismantling variable-diameter wet-type cutting head assembly and cutting tooth dismantling tool thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211692459U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969787A (en) * | 2021-11-04 | 2022-01-25 | 中国煤炭科工集团太原研究院有限公司 | Three-hole spline-connected cutting head and mechanism of inner-spraying longitudinal-shaft cantilever type heading machine |
-
2020
- 2020-03-05 CN CN202020259192.9U patent/CN211692459U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969787A (en) * | 2021-11-04 | 2022-01-25 | 中国煤炭科工集团太原研究院有限公司 | Three-hole spline-connected cutting head and mechanism of inner-spraying longitudinal-shaft cantilever type heading machine |
| CN113969787B (en) * | 2021-11-04 | 2024-03-12 | 中国煤炭科工集团太原研究院有限公司 | Three-hole spline connected internal spraying longitudinal axis cantilever type heading machine cutting head and mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102132007B (en) | Cutting tool with water injection to cutting bit shank | |
| KR101573154B1 (en) | Tip for an earth working roll | |
| US10589278B2 (en) | Wear cap for an earth working roll | |
| CN106103880B (en) | Digging tool | |
| WO2010118249A1 (en) | Retention assembly for cutting bit | |
| CN211692459U (en) | Quick-dismantling variable-diameter wet-type cutting head assembly and cutting tooth dismantling tool thereof | |
| CN211692452U (en) | Quick-dismantling wet-type cutting head or cutting drum assembly and cutting pick dismantling tool thereof | |
| US10378187B2 (en) | Replaceable mounting apparatus for reducing elements | |
| CN111287744A (en) | Wet-type cutting head or cutting drum assembly with detachable toothholder | |
| CN211692460U (en) | Spray type cutting head with interchangeable conical cutting pick and flat cutting pick | |
| CN212079302U (en) | Can dismantle dry-type cutterhead or cutting drum assembly of toothholder | |
| US8777326B2 (en) | Pick with hardened core assembly | |
| CN212079297U (en) | Wet-type cutting head or cutting drum assembly with detachable toothholder | |
| CN212079301U (en) | Detachable cutting tool assembly with dust fall function | |
| CN111305838A (en) | Can dismantle dry-type cutterhead or cutting drum assembly of toothholder | |
| JP6470077B2 (en) | Cutting bit mounting structure of tunnel machine | |
| CN111271059A (en) | Detachable cutting tool assembly with dust fall function | |
| CN211715127U (en) | Hexagonal locking cutting head with detachable bevel gear seat assembly | |
| CN111364988B (en) | Detachable cutting tool assembly | |
| US10619420B2 (en) | Reamer with replaceable rolling cutters | |
| RU106306U1 (en) | CUTTER FOR MOUNTAIN AND ROAD MACHINES | |
| CN218093023U (en) | Knife-shaped cutting pick | |
| CN212154762U (en) | Wear-resisting pick with anti camber beam and extracting tool thereof | |
| CN213743414U (en) | Heavy-load replaceable advanced cutter support for shield cutter | |
| CN113969787B (en) | Three-hole spline connected internal spraying longitudinal axis cantilever type heading machine cutting head and mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Quick detachable variable diameter wet cutting head assembly and its cutting tooth disassembly tool Effective date of registration: 20230324 Granted publication date: 20201016 Pledgee: Bank of China Limited Taiyuan Pingyang sub branch Pledgor: Shanxi Zhongke Taitong industrial and mining equipment Co.,Ltd. Registration number: Y2023140000015 |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 9 Jingyuan South Road, Qixian Economic Development Zone, Jinzhong City, Shanxi Province, 030900 Patentee after: Zhongke Taitong Equipment Co.,Ltd. Address before: Room 621, Building 4, Incubation Base, No. 11 Kangshou Street, Taiyuan Tanghuai Industrial Park, Taiyuan Comprehensive Reform Demonstration Zone, Shanxi Province, 030032 Patentee before: Shanxi Zhongke Taitong industrial and mining equipment Co.,Ltd. |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20201016 Pledgee: Bank of China Limited Taiyuan Pingyang sub branch Pledgor: Shanxi Zhongke Taitong industrial and mining equipment Co.,Ltd. Registration number: Y2023140000015 |