CN111364988B - Detachable cutting tool assembly - Google Patents
Detachable cutting tool assembly Download PDFInfo
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- CN111364988B CN111364988B CN202010147005.2A CN202010147005A CN111364988B CN 111364988 B CN111364988 B CN 111364988B CN 202010147005 A CN202010147005 A CN 202010147005A CN 111364988 B CN111364988 B CN 111364988B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 146
- 238000005452 bending Methods 0.000 claims abstract description 22
- 238000003780 insertion Methods 0.000 claims abstract description 22
- 230000037431 insertion Effects 0.000 claims abstract description 21
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims description 9
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 19
- 238000005065 mining Methods 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 230000036346 tooth eruption 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention provides a detachable cutting tool assembly, which belongs to the technical field of cutting device accessories of coal mining machinery and comprises a conical cutting tooth, a conical tooth holder, a connecting seat and a fixing block; 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 bevel gear tooth seat is provided with a mounting hole matched with the gear handle, and the lower part of the bevel gear tooth seat is provided with a quick tenon; the connecting seat is used for being welded on the cutting head or the cutting drum and is provided with an inserting groove matched with the quick inserting tenon; the fixed block is used for being fixed on the connecting seat after the fast tenon and the insertion groove are assembled, and the insertion hole of the insertion groove is closed. Above-mentioned detachable cutting tool assembly multiplicable pick bending resistance can realize simultaneously that toothholder and cutterhead or cutting drum can dismantle and be connected.
Description
Technical Field
The invention belongs to the technical field of accessories of cutting devices of coal mining machinery, and particularly discloses a detachable cutting tool assembly.
Background
The cutting pick is arranged in a mounting hole of the cutting head tooth holder and can freely rotate around the axis in the mounting hole. In the working process of the heading machine, the cutting teeth are directly contacted with a coal body and a 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 teeth need to be replaced when the length of the holder rod is shortened to be incapable of being used 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.
The block is typically welded to the outer surface of the cutting head or cutting drum body and the cutting pick is inserted into a mounting hole in the block. 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 is welded with the cutting head or the cutting drum body, and the cutting head or the cutting drum has to be lifted for maintenance. In order to avoid the damage of the toothholder, the cutting head or the cutting drum can not be normally used, the toothholder can be reliably connected to the surface of the cutting head or the cutting drum, and can be detachably and mechanically connected with the toothholder, so that the toothholder can be dismounted, mounted and replaced without welding in the underground coal mine.
Disclosure of Invention
The invention aims to provide a detachable cutting tool assembly, which increases the bending resistance of a cutting pick and simultaneously realizes the detachable connection of a tooth holder and a cutting head or a cutting drum.
In order to achieve the purpose, the invention provides a detachable cutting tool assembly which comprises a conical cutting pick, a conical tooth holder, a connecting seat and a fixing block; 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;
the bevel gear tooth seat is provided with a mounting hole matched with the gear handle, and the lower part of the bevel gear tooth seat is provided with a quick tenon; the connecting seat is used for welding on the cutting head or the cutting drum and is provided with an inserting groove matched with the quick inserting tenon; the fixed block is used for being fixed on the connecting seat after the fast tenon and the insertion groove are assembled, and the insertion hole of the insertion groove is closed.
Further, the contact area between the front face of the bevel tooth seat and the chips is a separating face with an obtuse included angle.
Furthermore, 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 pick is inserted into the lining ring, and the tooth shoulder is abutted against the lining ring.
Furthermore, the detachable cutting tool assembly also comprises a baffle ring for a shaft; the part of the tooth handle extending out of the mounting hole is provided with an annular clamping groove matched with the baffle ring for the shaft.
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 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.
Furthermore, a fixing block mounting position is arranged on the 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.
Furthermore, the side surface of the connecting seat corresponding to the mounting position of the fixing 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.
Furthermore, the bottom surface and the side surface of the connecting seat are in transition connection through an inward-inclined welding slope surface.
The invention has the beneficial effects that:
among the above-mentioned detachable cutting tool assembly, the toper pick adopts the integrated into one piece of same material, and no joint seam has avoided the low frequency to assault the separation phenomenon of different materials under the load effect by a wide margin, improves the reliability that the pick used. The oval bending-resistant beams are uniformly distributed on the outer surface of the conical part, can effectively resist bending loads from different directions, and accordingly increase the bending resistance of the conical cutting pick, the working capacity of the cutting head or the cutting drum is improved, the convex structure can effectively resist abrasion of coal rocks to the conical part, and the service life of the conical cutting pick is prolonged. The tooth handle of the conical cutting tooth is rotatably arranged in the mounting hole of the conical tooth holder and rotates in the working process, and the coal body or rock is efficiently cut in. The quick tenon of the bevel gear tooth seat is matched with the insertion groove of the connecting seat, so that the quick assembly and disassembly are realized. The fixed block is used for being fixed on the connecting seat after fast tenon and the assembly of cartridge groove, seals the inserted hole in cartridge groove, guarantees the reliable connection of awl tooth toothholder and connecting seat, prevents that the cutting in-process awl tooth toothholder from droing.
Drawings
FIG. 1 is an assembly view of a removable cutting tool assembly provided by the present invention;
FIG. 2 is an exploded view of the removable cutting tool assembly of FIG. 1;
FIG. 3 is another side view of the exploded view of FIG. 2;
FIG. 4 is a schematic view of a conical pick of the removable cutting tool of FIG. 1;
FIG. 5 is a schematic view of a bevel-tooth holder of the removable cutting tool of FIG. 1;
FIG. 6 is an assembly view of the conical pick and the conical pick block;
FIG. 7 is an assembly view of the bevel gear tooth holder and the connecting seat;
FIG. 8 is a cross-sectional view taken in the direction of assembly A-A of FIG. 7;
fig. 9 is a cross-sectional view in the direction of assembly B-B shown in fig. 7.
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 surface; 1.6-hard metal; 1.7-oval beam bending resistance; 1.8-a rotation increasing groove; 1.9-ring groove; 1.10-concave shoulder; 2-a bevel gear 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-a connecting seat; 3.1-inserting grooves; 3.2-fixed groove; 3.3-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; 100-cutting head or cutting drum.
Detailed Description
The embodiment provides a detachable cutting tool assembly, which comprises a conical pick 1, a conical pick holder 2, a connecting seat 3 and a fixing block 4; 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 toothed handle 1.1 and the toothed 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;
the bevel gear tooth seat 2 is provided with a mounting hole 2.1 matched with the tooth handle 1.1, and the lower part of the bevel gear tooth seat is provided with a fast inserting tenon 2.2; the connecting seat 3 is used for welding on the cutting head or the cutting drum 100 and is provided with an inserting groove 3.1 matched with the fast inserting tenon 2.2; the fixing block 4 is used for being fixed on the 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.
Among the above-mentioned detachable cutting tool assembly, toper pick 1 adopts the integrated into one piece of same material, and no joint seam has avoided the low frequency to assault the separation phenomenon of different materials under the load effect by a wide margin, improves the reliability that the pick used. 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 or the cutting drum 100 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. The fast tenon 2.2 of the bevel gear tooth seat 2 is matched with the inserting groove 3.1 of the connecting seat 3 to realize fast disassembly and assembly. The fixed block 4 is used for sealing the insertion opening of the insertion groove 3.1 and fixing the insertion opening on the connecting seat 3 after the fast tenon 2.2 and the insertion groove 3.1 are assembled, so that the reliable connection of the cone tooth seat 2 and the connecting seat 3 is ensured, and the cutting process is prevented from causing the cone tooth seat 2 to fall off.
Furthermore, a plurality of increasing grooves 1.8 are arranged on the tooth shoulder 1.2 and the annular transitional curved surface 1.5 of the conical cutting pick 1. When the conical cutting pick 1 is cut into the coal body and rotates along with the cutting head or the cutting drum 100 to be turned into a cutting pile, the groove wall of the rotation increasing groove 1.8 is in unilateral contact with the coal body or the cutting under the rotation action of the cutting head or the cutting drum 100, the torque generated in the contact promotes the conical cutting pick 1 to rotate around the axis of the cutting pick, after the previous rotation increasing groove 1.8 is turned out of a contact area, the next rotation increasing groove 1.8 is in continuous contact with the coal body or the cutting, the conical cutting pick 1 is enabled to continuously rotate around the axis of the cutting pick, 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 arrangement of the rotation increasing groove 1.8 on the tooth shoulder 1.2 and the annular transition curved surface 1.5 can effectively avoid the weakening of the concave structure of the rotation increasing groove 1.8 on the local material of the tooth bar 1.3, and the overall strength of the conical cutting pick 1 is not reduced.
Furthermore, the included angle between two side surfaces of the rotation increasing groove 1.8 is 90-100 degrees.
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 remarkable the wear-inhibiting effect, and the better the use effect, without lowering the strength of the entire bevel-tooth head 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 distributing 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, because the hardness of the lining ring 5 is higher than that of the conical cutting pick 1, the wear mainly occurs on the end face of the tooth shoulder 1.2 contacting 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 contacting with the lining ring 5 fails due to wear, the conical cutting pick 1 of a vulnerable part can be replaced.
Furthermore, the detachable cutting tool assembly also comprises a baffle ring 6 for a 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 pick 1 is inserted into the mounting hole 2.1, and the shaft baffle ring 6 is clamped in the annular clamping groove 1.9 to fix the conical cutting pick 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 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 inserting tenon 2.2 can be fast inserted along the inserting groove 3.1, and automatic positioning in 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 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 3.2; a stop key 4.1 matched with the fixing groove 3.2 is arranged on the bottom surface of the fixing block 4; the fixing groove 3.2 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 3.2 and the stop key 4.1 effectively prevents the fixing block 4 from being released from the fixing block mounting position.
Furthermore, the side surface of the connecting seat 3 corresponding to the mounting position of the fixing block is an antifriction surface 8; the two sides of the fixed block 4 are provided with antifriction surfaces 8; the distance between the wear reducing surfaces 8 on both sides is gradually increased from front to back, and a right angle is formed in the moving direction of the connecting seat 3, so that the rotating working resistance of the cutting head or the cutting drum 100 is reduced.
Further, the bottom surface and the side surface of the connecting seat 3 are in transition connection through an inward-inclined welding slope surface 3.3, and the connecting seat 3 can be welded to the surface of the cutting head or the cutting drum 100 through the welding slope surface 3.3.
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; while the invention has been described in detail and with reference to the foregoing embodiments, it will 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; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A detachable cutting tool assembly is characterized by comprising a conical cutting pick, a conical tooth holder, a connecting seat and a fixing block;
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 spiral grooves are formed in the tooth shoulder and the annular transition curved surface of the conical cutting tooth;
the bevel gear tooth seat is provided with a mounting hole matched with the gear handle, and the lower part of the bevel gear tooth seat is provided with a quick tenon;
the connecting seat is used for welding on the cutting head or the cutting drum and is provided with an inserting groove matched with the quick inserting tenon;
the fixed block is used for being fixed on the connecting seat after the quick insertion tenon and the insertion groove are assembled, and closing an insertion hole of the insertion groove;
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 pick is inserted into the lining ring, and the tooth shoulder is abutted against the lining ring;
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.
2. The removable cutting tool assembly of claim 1 wherein the area of contact of the front face of the bevel toothholder with the swarf is a parting plane that is at an obtuse angle.
3. The detachable cutting tool assembly of claim 2, wherein the separating surface is embedded with a wear-resistant distributing block forming an acute angle with the horizontal direction;
the wear-resistant distributing block is made of hard alloy.
4. The removable cutting tool assembly of claim 3 further comprising a shaft stop ring;
and the part of the tooth handle extending out of the mounting hole is provided with an annular clamping groove matched with the baffle ring for the shaft.
5. The detachable cutting tool assembly of 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.
6. The detachable cutting tool assembly of claim 1, wherein the connecting seat is provided with a fixing block mounting location;
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;
all be provided with the screw on fixed slot and the locking key, set screw passes the screw and fixes the fixed block on fixed block installation position.
7. The removable cutting tool assembly of claim 6, wherein the side of the connecting seat corresponding to the mounting location of the fixture block is a wear reducing 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.
8. The removable cutting tool assembly of claim 7, wherein the bottom surface and the side surfaces of the connecting seat are transitionally connected by an inwardly inclined welding ramp.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010147005.2A CN111364988B (en) | 2020-03-05 | 2020-03-05 | Detachable cutting tool assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010147005.2A CN111364988B (en) | 2020-03-05 | 2020-03-05 | Detachable cutting tool assembly |
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| CN111364988A CN111364988A (en) | 2020-07-03 |
| CN111364988B true CN111364988B (en) | 2022-07-12 |
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| US4627665A (en) * | 1985-04-04 | 1986-12-09 | Ss Indus. | Cold-headed and roll-formed pick type cutter body with carbide insert |
| CN202165081U (en) * | 2011-07-05 | 2012-03-14 | 江苏创一精锻有限公司 | High-strength high-ductility novel integrated cutting pick |
| CN103867204A (en) * | 2012-12-12 | 2014-06-18 | 钴碳化钨硬质合金公司 | Cutting Tool Mounting Assembly |
| CN204899921U (en) * | 2015-07-08 | 2015-12-23 | 徐工集团工程机械股份有限公司 | Entry driving machine cutterhead and entry driving machine |
| CN205977215U (en) * | 2016-07-01 | 2017-02-22 | 包头科泰高技术材料有限责任公司 | Coal mining pick |
-
2020
- 2020-03-05 CN CN202010147005.2A patent/CN111364988B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4627665A (en) * | 1985-04-04 | 1986-12-09 | Ss Indus. | Cold-headed and roll-formed pick type cutter body with carbide insert |
| CN202165081U (en) * | 2011-07-05 | 2012-03-14 | 江苏创一精锻有限公司 | High-strength high-ductility novel integrated cutting pick |
| CN103867204A (en) * | 2012-12-12 | 2014-06-18 | 钴碳化钨硬质合金公司 | Cutting Tool Mounting Assembly |
| CN204899921U (en) * | 2015-07-08 | 2015-12-23 | 徐工集团工程机械股份有限公司 | Entry driving machine cutterhead and entry driving machine |
| CN205977215U (en) * | 2016-07-01 | 2017-02-22 | 包头科泰高技术材料有限责任公司 | Coal mining pick |
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|---|---|
| CN111364988A (en) | 2020-07-03 |
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