CN212079302U - Can dismantle dry-type cutterhead or cutting drum assembly of toothholder - Google Patents
Can dismantle dry-type cutterhead or cutting drum assembly of toothholder Download PDFInfo
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- CN212079302U CN212079302U CN202020259148.8U CN202020259148U CN212079302U CN 212079302 U CN212079302 U CN 212079302U CN 202020259148 U CN202020259148 U CN 202020259148U CN 212079302 U CN212079302 U CN 212079302U
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Abstract
The utility model provides a dry cutting head or cutting drum assembly with a detachable toothholder, belonging to the technical field of cutting device accessories of coal mining machinery, comprising a conical cutting pick, a conical toothholder, a connecting seat, a fixed block and a cutting head or a cutting drum; the conical cutting pick comprises a tooth handle, a tooth shoulder, a tooth bar and a conical part; 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 seat is provided with a mounting hole, and the lower part of the bevel gear seat is provided with a quick tenon; the connecting seat is 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 closing the insertion opening of the insertion groove. The dry cutting head or the cutting drum assembly with the detachable toothholder can increase the bending resistance of the cutting pick, and meanwhile, the toothholder and the cutting head or the cutting drum can be detachably connected.
Description
Technical Field
The utility model belongs to the technical field of colliery excavating machinery cutting device accessory, specifically disclose a can dismantle dry-type cutterhead or cutting drum assembly of toothholder.
Background
The cutting head is a cutting device widely used by coal mine tunneling equipment and mainly comprises a cutting head body with a welded 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 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.
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 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.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can dismantle dry-type cutterhead or cutting drum assembly of toothholder increases pick bending resistance, realizes that toothholder and cutterhead or cutting drum can dismantle simultaneously and be connected.
In order to achieve the purpose, the utility model provides a dry cutting head or a cutting drum assembly with a detachable tooth holder, which comprises a conical cutting pick, a conical tooth holder, a connecting seat, a fixed block and a cutting head or a cutting drum; 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 welded on the surface of the cutting head or the cutting drum in a spiral line form of 1, 2, 3, 4, 6 or 8 according to the spiral line parameters of the cylinder, the cone, the sphere or the table, and is provided with an inserting groove matched with the fast inserting tenon;
cylindrical section helical line equation:
conic section helix equation:
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;
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.
Furthermore, a plurality of spiral grooves are formed in the tooth shoulder and the annular transition curved surface of the conical cutting tooth.
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 dry cutting head or the cutting drum assembly of the detachable tooth holder 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 fixed block 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.
The utility model has the advantages that:
in the dry cutting head or the cutting drum assembly with the detachable tooth holder, the conical cutting teeth are integrally formed by the same material, no connecting seam exists, 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 teeth is improved. 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 fast tenon of the bevel gear tooth seat is matched with the inserting groove of the connecting seat, so that the fast disassembly and assembly 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 dry cutting head or cutting drum assembly with a removable tooth holder according to the present invention;
FIG. 2 is an exploded view of a conical pick, a conical pick holder, a connecting seat and a fixed block;
FIG. 3 is another side view of the exploded view of FIG. 2;
FIG. 4 is a schematic view of a conical pick;
FIG. 5 is a schematic structural view of a bevel gear seat;
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 sectional view A-A of the assembly of FIG. 7;
fig. 9 is a cross-sectional view B-B of the assembly of 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 curved surface; 1.6-hard metal; 1.7-oval beam bending resistance; 1.8-a rotation increasing groove; 1.9-ring slot; 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; 9-cutting head or cutting drum.
Detailed Description
The embodiment provides a dry cutting head or cutting drum assembly with a detachable tooth holder, which comprises a conical cutting pick 1, a conical tooth holder 2, a connecting seat 3, a fixing block 4 and a cutting head or cutting drum 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;
the bevel gear tooth seat 2 is provided with a mounting hole 2.1 matched with the gear handle 1.1, and the lower part of the bevel gear tooth seat is provided with a fast tenon 2.2; the connecting seat 3 is welded on the surface of the cutting head or the cutting drum in a spiral line form of 1, 2, 3, 4, 6 or 8 according to the spiral line parameters of a cylinder, a cone, a sphere or a spherical table, the position and the posture of the conical cutting tooth 1 can meet the design requirements, and an inserting groove 3.1 matched with the fast inserting tenon 2.2 is arranged;
cylindrical section helical line equation:
conic section helix equation:
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;
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.
In the above-mentioned dry-type cutterhead or the cutting drum assembly that can dismantle the toothholder, toper pick 1 adopts the integrated into one piece of same material, and no joint seam has avoided the low frequency to strike 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 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. 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 being fixed on the connecting seat 3 after the fast tenon 2.2 and the plug-in groove 3.1 are assembled, sealing the insertion opening of the plug-in groove 3.1, ensuring the reliable connection of the conical tooth toothholder 2 and the connecting seat 3, and preventing the conical tooth toothholder 2 from falling off in the cutting process.
The outline of the cutting head or the cutting drum 9 is the free combination of a cylinder, a cone, a sphere or a spherical table body, and can be the combination of the cylinder, the cone and the sphere, the cylinder, the cone and the spherical table body, the cone and the spherical table body, the cylinder, the sphere, the cylinder and the spherical table body, and the like.
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 9 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 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 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 separating surface 2.3 with an obtuse included angle, so that the impact abrasion of the cutting chips and other abrasive materials to 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 dry cutting head or the cutting drum assembly of the detachable toothholder 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 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 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 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; the bottom surface of the fixed block 4 is provided with a stop key 4.1 matched with the fixed groove 3.2; 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.
Further, the side surface of the 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 wear reducing surfaces 8 is gradually increased from front to back, a right angle is formed in the moving direction of the connecting seat 3, and the rotating working resistance of the cutting head or the cutting drum 9 is reduced.
Furthermore, 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 9 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; 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 dry cutting head or cutting drum assembly with a detachable tooth holder is characterized by comprising a conical cutting tooth, a conical tooth holder, a connecting seat, a fixing block and a cutting head or cutting drum;
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;
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 welded on the surface of the cutting head or the cutting drum in a spiral line form of 1, 2, 3, 4, 6 or 8 according to the spiral line parameters of the cylinder, the cone, the sphere or the table, and is provided with an inserting groove matched with the fast inserting tenon;
cylindrical section helical line equation:
conic section helix equation:
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; the fixed block is used for inserting the tenon soonAnd the inserting slot is assembled and then fixed on the connecting seat to seal the inserting hole of the inserting slot.
2. The removable block dry cutter head or drum assembly of claim 1 wherein the shoulder and annular transition surface of the conical pick define a plurality of grooves for increasing rotation.
3. A dry cutter head or cutter drum assembly with removable toothholder as claimed in claim 1, characterized in that the area of the front face of the conical toothholder that is in contact with the cuttings is a parting plane with an obtuse angle.
4. The detachable-toothholder dry cutter head or cutter drum assembly as claimed in claim 3, characterized in that the parting plane is embedded with wear-resistant segments at an acute angle to the horizontal;
the wear-resistant distributing block is made of hard alloy.
5. The dry cutter head or cutting drum assembly with removable toothholders of claim 3 or 4 wherein the mounting holes of the toothholders comprise 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.
6. The removable pick holder dry cutter head or cutter drum assembly of claim 5 further comprising a shaft retainer 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.
7. The dry cutter head or cutter drum assembly with removable pick block of claim 6 wherein the underside 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.
8. The dry cutting head or cutting drum assembly with detachable toothholder of claim 1, characterized in that the quick tenon is a T-shaped tenon, the distance between the side positioning surfaces at both sides is gradually reduced from front to back, and the side positioning surfaces are transitionally connected with the back end surface through a guide inclined surface;
the inserting groove is matched with the quick inserting tenon.
9. The dry cutter head or cutter drum assembly with removable toothholder 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;
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.
10. The dry cutter head or cutter drum assembly with removable toothholder of claim 9, wherein the connecting seat has a wear reducing surface on the side corresponding to the mounting location of the fixing block;
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020259148.8U CN212079302U (en) | 2020-03-05 | 2020-03-05 | Can dismantle dry-type cutterhead or cutting drum assembly of toothholder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020259148.8U CN212079302U (en) | 2020-03-05 | 2020-03-05 | Can dismantle dry-type cutterhead or cutting drum assembly of toothholder |
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| CN212079302U true CN212079302U (en) | 2020-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117552784A (en) * | 2024-01-11 | 2024-02-13 | 大同市同华矿机制造有限责任公司 | Cutting tool bit and cutting drum |
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2020
- 2020-03-05 CN CN202020259148.8U patent/CN212079302U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117552784A (en) * | 2024-01-11 | 2024-02-13 | 大同市同华矿机制造有限责任公司 | Cutting tool bit and cutting drum |
| CN117552784B (en) * | 2024-01-11 | 2024-03-22 | 大同市同华矿机制造有限责任公司 | Cutting tool bit and cutting drum |
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