A dry cutting head or cutting drum assembly with a detachable tooth seat

Abstract

The present invention provides a dry-type cutting head or cutting drum assembly with a detachable tooth seat, which belongs to the technical field of accessories for cutting devices of coal mining machinery, and includes a conical cutting tooth, a conical tooth seat, a connecting seat, a fixing block, and a cutting head or cutting drum; the conical cutting tooth includes a shank, a tooth shoulder, a tooth rod, and a conical portion; the shank and the tooth rod are both cylindrical structures; the tooth shoulder is a truncated cone structure, the bottom surface is connected to the shank, and the top surface is connected to the tooth rod through an annular transition surface; the conical portion is located on the tooth rod, and a cemented carbide is brazed on the top, and a plurality of oval anti-bending beams are evenly arranged on the circumferential surface; a mounting hole is arranged on the conical tooth seat, and a quick-insert tenon is arranged at the bottom; the connecting seat is welded on the cutting head or cutting drum, and is provided with an insertion groove that cooperates with the quick-insert tenon; the fixing block is used to close the insertion port of the insertion groove. The dry-type cutting head or cutting drum assembly with a detachable tooth seat can increase the anti-bending ability of the cutting tooth, and at the same time realize the detachable connection between the tooth seat and the cutting head or cutting drum.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting device accessories of coal mining machinery, and specifically discloses a dry-type cutting head or a cutting drum assembly with a detachable tooth seat. Background Art

[0002] The cutting head is a cutting device widely used in coal mining excavation equipment. It is mainly composed of a cutting head body with a welded structure, a tooth seat welded on the cutting head body, and a pick installed in the mounting hole of the tooth seat. In the process of rock excavation after coal mining, there is usually obvious wear of the pick and the tooth seat. When wear occurs on the pick, the pick can be removed from the mounting hole of the tooth seat and replaced with a new one. However, when the tooth seat is worn, the tooth seat cannot be replaced because the tooth seat is welded to the cutting head or cutting drum body. At this time, the cutting head or cutting drum has to be lifted to the well for maintenance. In order to avoid the damage of the tooth seat causing the cutting head or cutting drum to be unable to be used normally, a device is needed that can be reliably connected to the surface of the cutting head or cutting drum and can be detachably connected to the tooth seat, so as to realize the disassembly and replacement of the tooth seat without welding in the coal mine.

[0003] The pick is installed in the mounting hole of the cutting head tooth seat and can rotate freely around its axis in the mounting hole. During the operation of the tunnel boring machine, the pick is in direct contact with the coal body and the rock body. As time goes by, the circumferential surface of the tapered part of the pick tooth rod is evenly worn until the wear causes the length of the tooth rod to be shortened to the point where it cannot be used. Then a new pick needs to be replaced. Some existing picks extend the service life of the pick by reducing the angle of the tapered part and coating it with wear-resistant materials. However, this method actually makes the pick into a combination structure of two materials, which greatly weakens the bending resistance of the pick tooth rod and affects the actual service life of the pick. Due to the complex geological conditions of coal mines, under some conditions where the hardness and abrasiveness of coal and rock are high and have a certain degree of abrasiveness, when the contact force between the pick shank and the mounting hole of the tooth seat increases and exceeds the critical friction between the two, the rotational freedom of the pick in the mounting hole is restricted, and the pick cannot rotate during the contact with the coal body and the rock body. A certain area of ​​the pick tooth rod in the circumferential direction will always be in contact with the coal body or rock body, and the metal material in this area will be sharply worn, resulting in eccentric wear of the pick. The strength of the pick that has been worn eccentrically will be further weakened, causing the pick to bend and fail as a whole. In addition, in order to reduce the resistance of the pick to cutting into the coal or rock, the front end taper of the pick rod is usually smaller, making it easier for the pick to cut into the coal or rock. However, the smaller taper of the rod will deteriorate the wrapping performance of the cemented carbide installed on the top of the pick. After a certain amount of wear occurs to the metal material in the circumferential direction of the pick rod, the cemented carbide is very easy to fall off, resulting in the pick being unable to effectively break the rock. Therefore, under the premise of ensuring that the geometric dimensions of the pick remain unchanged during installation and use, improving the self-sharpening property of the pick, increasing the pick's bending resistance and having a certain degree of wear resistance can effectively extend the service life of the pick. Summary of the invention

[0004] The object of the present invention is to provide a dry-type cutting head or cutting drum assembly with a detachable tooth seat, so as to increase the bending resistance of the cutting teeth and realize the detachable connection between the tooth seat and the cutting head or cutting drum.

[0005] To achieve the above-mentioned object, the present invention provides a dry-type cutting head or cutting drum assembly with a detachable tooth seat, comprising a conical pick, a conical tooth seat, a connecting seat, a fixing block and a cutting head or a cutting drum; the conical pick comprises an integrally formed tooth shank, a tooth shoulder, a tooth rod and a conical portion; the tooth shank and the tooth rod are both cylindrical structures; the tooth shoulder is a truncated cone structure, the bottom surface of which is connected to the tooth shank, and the top surface is connected to the tooth rod through an annular transition surface; the conical portion is located on the tooth rod, the top of which is brazed with cemented carbide, and a plurality of oval anti-bending beams are evenly arranged on the circumferential surface; the oval anti-bending beams are arranged in the form of small upper and large lower portions, and the oval contour curve of the oval anti-bending beam is controlled by parameter equation (1).

[0006]

[0007] Where c is a number greater than 2;

[0008] The bevel gear seat is provided with a mounting hole that matches the gear shank, and a quick-insert tenon is provided at the lower part; the connecting seat is welded on the surface of the cutting head or cutting drum in the form of 1, 2, 3, 4, 6 or 8 spiral lines according to the spiral line parameters of the cylinder, cone, sphere or ball table, and is provided with an insertion groove that matches the quick-insert tenon;

[0009] The equation of a cylindrical helix:

[0010]

[0011] Conical segment helix equation:

[0012]

[0013] The equation of the helix of a sphere segment:

[0014]

[0015] In the above formula, R, p and Q are the control radii of the helical lines of the cylinder, cone and sphere segments, respectively. ψ is the cone structure control parameter, λ is the helix pitch angle, θ is the helix turning angle;

[0016] The fixing block is used to fix on the connecting seat after the quick-insertion tenon and the insertion slot are assembled, so as to close the insertion opening of the insertion slot.

[0017] Furthermore, a plurality of rotation-increasing grooves are provided on the tooth shoulder and the annular transition surface of the conical pick.

[0018] Furthermore, the area where the front of the bevel gear adapter contacts the chips is a separation surface with an obtuse angle.

[0019] Furthermore, the separation surface is inlaid with wear-resistant dividing blocks which form an acute angle with the horizontal direction; the wear-resistant dividing blocks are hard alloy.

[0020] Furthermore, the mounting hole of the bevel gear seat includes a first step hole, a second step hole and a third step hole, the radius of which decreases successively from front to back; a liner ring is interference fit in the first step hole and the second step hole, and the hardness of the liner ring is greater than the hardness of the conical pick; the shank of the conical pick is inserted in the liner ring, and the tooth shoulder rests on the liner ring.

[0021] Furthermore, the dry cutting head or cutting drum assembly with the above-mentioned detachable tooth seat also includes a shaft retaining ring; the portion of the shank extending from the mounting hole is provided with an annular groove that cooperates with the shaft retaining ring.

[0022] Furthermore, an annular concave shoulder is arranged on the bottom surface of the tooth shoulder; and a convex shoulder matching with the concave shoulder is arranged on the liner ring.

[0023] Furthermore, the quick-insertion tenon is a T-shaped tenon, the distance between the side positioning surfaces on both sides gradually decreases from front to back, and the side positioning surface and the rear end surface are transitionally connected by a guiding inclined surface; the insertion slot cooperates with the quick-insertion tenon.

[0024] Furthermore, a fixed block installation position is provided on the connecting seat; the fixed block installation position extends forward from the insertion port of the insertion slot and is provided with a fixed slot; a stop key cooperating with the fixed slot is provided on the bottom surface of the fixed block; screw holes are provided on the fixing slot and the stop key, and the fixing screws pass through the screw holes to fix the fixed block on the fixed block installation position.

[0025] Furthermore, the side surface of the connecting seat corresponding to the mounting position of the fixing block is a friction reducing surface; both sides of the fixing block are friction reducing surfaces; and the distance between the friction reducing surfaces on both sides gradually increases from front to back.

[0026] The beneficial effects of the present invention are:

[0027] In the above-mentioned dry-type cutting head or cutting drum assembly with a detachable tooth seat, the conical pick is integrally formed of the same material without a connection seam, thereby avoiding the separation of different materials under the action of low-frequency and large impact loads and improving the reliability of the use of the pick. The oval anti-bending beams are evenly distributed on the outer surface of the conical part, which can effectively resist the bending loads from different directions, so as to increase the bending resistance of the conical pick, thereby improving the working capacity of the cutting head or cutting drum. The convex structure can effectively resist the wear of the conical part by coal and rock, and extend the service life of the conical pick. The tooth shank of the conical pick is rotatably installed in the mounting hole of the conical tooth seat, rotates during the working process, and efficiently cuts into the coal body or rock. The quick-insertion tenon of the conical tooth seat cooperates with the insertion slot of the connecting seat to achieve rapid disassembly and assembly. The fixing block is used to fix on the connecting seat after the quick-insertion tenon and the insertion slot are assembled, close the insertion port of the insertion slot, ensure the reliable connection between the conical tooth seat and the connecting seat, and prevent the conical tooth seat from falling off during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An assembly diagram of a dry-type cutting head or cutting drum assembly with a detachable tooth seat provided by the present invention;

[0029] Figure 2 The exploded view of the conical pick, conical gear adapter, connecting seat and fixing block;

[0030] Figure 3 for Figure 2 Another direction view of the exploded diagram shown;

[0031] Figure 4 It is a schematic diagram of the structure of a conical pick;

[0032] Figure 5 It is a structural schematic diagram of a bevel gear seat;

[0033] Figure 6 The figure is the assembly drawing of the conical pick and the conical gear adapter;

[0034] Figure 7 This is the assembly drawing of the bevel gear adapter and the connecting seat;

[0035] Figure 8 for Figure 7 The cross-sectional view in the AA direction of the assembly drawing shown;

[0036] Fig. 9 for Figure 7 The sectional view in the BB direction of the assembly drawing is shown.

[0037] In the figure: 1-conical pick; 1.1-tooth handle; 1.2-tooth shoulder; 1.3-tooth rod; 1.4-conical part; 1.5-annular transition surface; 1.6-hard alloy; 1.7-ovate anti-bending beam; 1.8-rotation increasing groove; 1.9-annular clamping groove; 1.10-concave shoulder; 2-conical tooth seat; 2.1-mounting hole; 2.2-quick tenon; 2.3-separation surface; 2.4-wear-resistant dividing block; 2.5-side positioning surface; 2.6-guide slope; 3-connecting seat; 3.1-insertion groove; 3.2-fixing groove; 3.3-welding slope; 4-fixing block; 4.1-stop key; 5-bushing ring; 5.1-convex shoulder; 6-shaft retaining ring; 7-fixing screw; 8-friction reducing surface; 9-cutting head or cutting drum. DETAILED DESCRIPTION

[0038] The present embodiment provides a dry-type cutting head or cutting drum assembly with a detachable tooth seat, comprising a conical pick 1, a conical tooth seat 2, a connecting seat 3, a fixing block 4 and a cutting head or cutting drum 9; the conical pick 1 comprises an integrally formed tooth shank 1.1, a tooth shoulder 1.2, a tooth rod 1.3 and a conical portion 1.4; the tooth shank 1.1 and the tooth rod 1.3 are both cylindrical structures; the tooth shoulder 1.2 is a truncated cone structure, the bottom surface of which is connected to the tooth shank 1.1, and the top surface is connected to the tooth rod 1.3 through an annular transition surface 1.5; the conical portion 1.4 is located on the tooth rod 1.3, the top of which is brazed with a cemented carbide 1.6, and a plurality of oval anti-bending beams 1.7 are evenly arranged on the circumferential surface; the oval anti-bending beams 1.7 are arranged in the form of a small top and a large bottom, and the oval contour curve of the oval anti-bending beam 1.7 is controlled by parameter equation (1).

[0039]

[0040] Where c is a number greater than 2;

[0041] The bevel tooth seat 2 is provided with a mounting hole 2.1 that matches the tooth shank 1.1, and a quick-insertion tenon 2.2 is provided at the lower part; the connecting seat 3 is welded on the surface of the cutting head or the cutting drum in the form of 1, 2, 3, 4, 6 or 8 spiral lines according to the spiral line parameters of the cylinder, cone, sphere or ball table, and can make the position and posture of the conical pick 1 meet the design requirements, and is provided with an insertion groove 3.1 that matches the quick-insertion tenon 2.2;

[0042] The equation of a cylindrical helix:

[0043]

[0044] Conical segment helix equation:

[0045]

[0046] The equation of the helix of a sphere segment:

[0047]

[0048] In the above formula, R, p and Q are the control radii of the helical lines of the cylinder, cone and sphere segments, respectively. ψ is the cone structure control parameter, λ is the helix pitch angle, θ is the helix turning angle;

[0049] The fixing block 4 is used to fix on the connecting seat 3 after the quick-insertion tenon 2.2 is assembled with the insertion slot 3.1, so as to close the insertion opening of the insertion slot 3.1.

[0050] In the above-mentioned dry-type cutting head or cutting drum assembly with a detachable tooth seat, the conical pick 1 is integrally formed of the same material without any connection seams, thereby avoiding the separation of different materials under low-frequency and large-scale impact loads and improving the reliability of the use of the pick. The oval anti-bending beams 1.7 are evenly distributed on the outer surface of the conical part 1.4, which can effectively resist bending loads from different directions, so as to increase the bending resistance of the conical pick 1, thereby improving the working capacity of the cutting head or cutting drum 9. The convex structure can effectively resist the wear of the conical part 1.4 by coal and rock, and extend the service life of the conical pick 1. The shank 1.1 of the conical pick 1 is rotatably installed in the mounting hole 2.1 of the conical tooth seat 2, and rotates during operation to efficiently cut into the coal body or rock. The quick-insert tenon 2.2 of the conical tooth seat 2 cooperates with the insertion slot 3.1 of the connecting seat 3 to achieve rapid disassembly and assembly. The fixing block 4 is used to fix the quick-insertion tenon 2.2 on the connecting seat 3 after being assembled with the insertion slot 3.1, close the insertion opening of the insertion slot 3.1, ensure the reliable connection between the bevel gear seat 2 and the connecting seat 3, and prevent the bevel gear seat 2 from falling off during the cutting process.

[0051] The outer contour of the cutting head or cutting drum 9 is a free combination of a cylinder, a cone, a sphere or a spherical table, which can be a combination of cylinder + cone + sphere, cylinder + cone + spherical table, cone + sphere, cone + spherical table, cylinder + sphere, cylinder + spherical table, etc.

[0052] Furthermore, a plurality of rotation-increasing grooves 1.8 are provided on the tooth shoulder 1.2 and the annular transition surface 1.5 of the conical pick 1. When the conical pick 1 cuts into the coal body and rotates into the chip pile as the cutting head or cutting drum 9 rotates, the groove wall of the rotation-increasing groove 1.8 will make unilateral contact with the coal body or the chips under the rotation of the cutting head or cutting drum 9, and the torque generated during the contact will promote the rotation of the conical pick 1 around the pick axis. After the previous rotation-increasing groove 1.8 rotates out of the contact area, the next rotation-increasing groove 1.8 will continue to contact the coal body or the chips, so that the conical pick 1 forms a continuous rotation around the pick axis, thereby increasing the self-rotation performance of the conical pick 1. Since the conical pick 1 is an integral structure, the tooth rod 1.3 and the cemented carbide 1.6 brazed to the top of the conical part 1.4 will also rotate accordingly, thereby realizing the self-sharpening of the conical pick 1 during the cutting and chip loading process, thereby extending the service life of the pick. Arranging the rotation-increasing groove 1.8 on the tooth shoulder 1.2 and the annular transition curved surface 1.5 can effectively avoid the concave structure of the rotation-increasing groove 1.8 weakening the local material of the tooth rod 1.3 and does not reduce the overall strength of the conical pick 1.

[0053] Furthermore, the angle between the two side surfaces of the rotation-increasing groove 1.8 is 90-100°. Furthermore, the area in front of the bevel gear seat 2 that contacts the chips is a separation surface 2.3 with an obtuse angle, which can effectively reduce the impact wear of abrasive materials such as chips on the gear seat when the cutting head rotates. The obtuse angle is mainly based on the angle corresponding to the wear state measured after the cutting tooth is worn in actual work, and is usually not less than 90° and between 120°-160°. Without reducing the overall strength of the bevel gear seat 2, the smaller the obtuse angle, the smaller the resistance, the more obvious the inhibitory effect on wear, and the better the use effect. The schematic angle in the figure is 150°.

[0054] Furthermore, the separation surface 2.3 is inlaid with a wear-resistant material dividing block 2.4 which is at an acute angle to the horizontal direction, so that the chips can be discharged smoothly along the moving direction of the conical tooth seat 2; the wear-resistant material dividing block 2.4 is hard alloy. According to the design standard for cutting coal and rock, the linear speed of the tooth tip (hard alloy 1.6 part) when the cutting head cuts rock, and the reasonable range of this angle is 20-30°. In the figure, the angle is about 22°.

[0055] Furthermore, the mounting hole 2.1 of the bevel gear holder 2 includes a first step hole, a second step hole and a third step hole whose radius decreases from front to back in sequence; the first step hole and the second step hole are interference-fitted with a liner ring 5, so that the two become an integral structure, which improves the reliability of the connection between the bevel gear holder 2 and the liner ring 5, and the hardness of the liner ring 5 is greater than the hardness of the conical pick 1; the shank 1.1 of the conical pick 1 is inserted in the liner ring 5, and the tooth shoulder 1.2 abuts against the liner ring 5. The liner ring 5 is made of high wear-resistant alloy steel after heat treatment. When the conical pick 1 rotates in the liner ring 5 and generates friction and wear, since the hardness of the liner ring 5 is higher than the hardness of the conical pick 1, the wear will mainly occur on the tooth shoulder 1.2 and the end face in contact with the liner ring 5. When the cemented carbide 1.6 at the top of the conical pick 1 or the end face in contact with the liner ring 5 fails due to wear, the conical pick 1, which is a vulnerable component, can be replaced.

[0056] Furthermore, the dry-type cutting head or cutting drum assembly with a detachable tooth seat further comprises a shaft retaining ring 6; the portion of the tooth shank 1.1 extending from the mounting hole 2.1 is provided with an annular groove 1.9 that cooperates with the shaft retaining ring 6. The tooth shank 1.1 of the conical pick 1 is inserted into the mounting hole 2.1, and the shaft retaining ring 6 is clamped in the annular groove 1.9 to fix the conical pick 1 in the conical tooth seat 2.

[0057] Furthermore, the bottom surface of the tooth shoulder 1.2 is provided with an annular concave shoulder 1.10; and the lining ring 5 is provided with a convex shoulder 5.1 that cooperates with the concave shoulder 1.10. The tooth shoulder 1.2 and the lining ring 5 are interlocked with each other through an annular conical surface, and the tooth shoulder 1.2 can rotate freely in the lining ring 5 without falling out of the lining ring 5. The tooth shoulder 1.2 and the lining ring 5 are in contact with each other through the annular conical surface, which effectively increases the contact area, reduces the contact specific pressure, and reduces wear. In addition, the convex shoulder-concave shoulder interlocking structure can also prevent the conical pick 1 from shaking in the mounting hole 2.1 due to assembly clearance or wear on the cylindrical surface of the shank 1.1, and can effectively stabilize the conical pick 1 during the cutting process.

[0058] Furthermore, the quick-insertion tenon 2.2 is a T-shaped tenon, and the distance between the side positioning surfaces 2.5 on both sides gradually decreases from front to back, and the side positioning surface 2.5 and the rear end surface are transitionally connected through the guide slope 2.6; the insertion slot 3.1 cooperates with the quick-insertion tenon 2.2. The side positioning surface 2.5 and the guide slope 2.6 of the quick-insertion tenon 2.2 can be quickly inserted along the insertion slot 3.1 to achieve automatic positioning in the insertion direction. The angle between the side positioning surfaces 2.5 on both sides is the self-positioning angle.

[0059] Furthermore, the connection seat 3 is provided with a fixed block installation position; the fixed block installation position extends forward from the insertion port of the insertion slot 3.1 and is provided with a fixed slot 3.2; the bottom surface of the fixed block 4 is provided with a stop key 4.1 that cooperates with the fixed slot 3.2; the fixed slot 3.2 and the stop key 4.1 are both provided with screw holes, and the fixing screw 7 passes through the screw holes to fix the fixed block 4 on the fixed block installation position. The provision of the fixed slot 3.2 and the stop key 4.1 effectively prevents the fixed block 4 from falling out of the fixed block installation position.

[0060] Furthermore, the side surface on the connecting seat 3 corresponding to the fixing block installation position is a wear-reducing surface 8; the two sides of the fixing block 4 are wear-reducing surfaces 8; the distance between the wear-reducing surfaces 8 on both sides gradually increases from front to back, forming a right angle in the movement direction of the connecting seat 3, thereby reducing the rotational working resistance of the cutting head or cutting drum 9.

[0061] Furthermore, the bottom surface and the side surface of the connecting seat 3 are transitionally connected via an inwardly inclined welding slope 3.3, and the connecting seat 3 can be welded to the surface of the cutting head or the cutting drum 9 via the welding slope 3.3.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dry cutting head or cutting drum assembly with a detachable tooth seat, characterized in that: It includes a conical pick, a conical tooth seat, a connecting seat, a fixing block and a cutting head or a cutting drum; The conical pick comprises an integrally formed tooth shank, tooth shoulder, tooth rod and conical portion; The tooth handle and the tooth rod are both cylindrical structures; The tooth shoulder is a truncated cone structure, the bottom surface of which is connected to the tooth handle, and the top surface of which is connected to the tooth rod through an annular transition surface; The conical part is located on the gear rod, the top of which is brazed with hard alloy, and a plurality of oval anti-bending beams are evenly arranged on the circumferential surface; The oval bending-resistant beam is arranged in a form of being small at the top and large at the bottom. The oval contour curve of the oval bending-resistant beam is controlled by parameter equation (1). Where c is a number greater than 2; The bevel gear seat is provided with a mounting hole matched with the gear handle, and a quick-insertion tenon is provided at the lower part; The connecting seat is welded on the surface of the cutting head or cutting drum in the form of 1, 2, 3, 4, 6 or 8 spiral lines according to the spiral line parameters of a cylinder, cone, sphere or ball table, and is provided with an insertion groove that cooperates with the quick-insertion tenon; The equation of a cylindrical helix: Conical segment helix equation: The equation of the helix of a sphere segment: In the above formula, R, p and Q are the control radii of the helical lines of the cylinder, cone and sphere segments, respectively. ψ is the cone structure control parameter, λ is the helix pitch angle, θ is the helix turning angle; The fixing block is used to fix on the connecting seat after the quick-insertion tenon and the insertion slot are assembled, and close the insertion opening of the insertion slot; The quick-insertion tenon is a T-shaped tenon, the distance between the side positioning surfaces on both sides gradually decreases from front to back, and the side positioning surface and the rear end surface are transitionally connected by a guide slope; The insertion slot cooperates with the quick-insertion tenon; The connecting seat is provided with a fixing block installation position; The fixing block installation position extends forward from the insertion opening of the insertion slot and is provided with a fixing slot; The bottom surface of the fixing block is provided with a stop key that cooperates with the fixing groove; The fixing groove and the stop key are both provided with screw holes, and the fixing screws pass through the screw holes to fix the fixing block on the fixing block installation position.

2. The dry cutting head or cutting drum assembly with a detachable tooth seat according to claim 1, characterized in that: A plurality of rotation-increasing grooves are arranged on the tooth shoulder and the annular transition curved surface of the conical pick.

3. The dry cutting head or cutting drum assembly with a detachable tooth seat according to claim 1, characterized in that: The area in front of the bevel gear seat that contacts the chips is a separation surface with an obtuse angle.

4. The dry cutting head or cutting drum assembly with a detachable tooth seat according to claim 3, characterized in that: The separation surface is inlaid with wear-resistant material dividing blocks that form an acute angle with the horizontal direction; The wear-resistant dividing block is made of hard alloy.

5. The dry cutting head or cutting drum assembly with a detachable tooth seat according to claim 3 or 4, characterized in that: The mounting hole of the bevel gear adapter includes a first step hole, a second step hole and a third step hole whose radius decreases from front to back; The first step hole and the second step hole are interference-fitted with liner rings, and the hardness of the liner rings is greater than the hardness of the conical pick; The tooth shank of the conical pick is inserted in the liner ring, and the tooth shoulder abuts against the liner ring.

6. The dry cutting head or cutting drum assembly with a detachable tooth seat according to claim 5, characterized in that: Also included is a shaft retaining ring; The portion of the tooth shank extending from the mounting hole is provided with an annular groove matched with a shaft retaining ring.

7. The dry-type cutting head or cutting drum assembly with a detachable tooth seat according to claim 6, characterized in that: The bottom surface of the tooth shoulder is provided with an annular concave shoulder; The lining ring is provided with a convex shoulder which matches with the concave shoulder.

8. The dry-type cutting head or cutting drum assembly with a detachable tooth seat according to claim 1, characterized in that: The side surface of the connecting seat corresponding to the mounting position of the fixing block is a friction reducing surface; Both sides of the fixed block are wear-reducing surfaces; The distance between the wear-reducing surfaces on both sides gradually increases from front to back.

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