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

Abstract

The present invention provides a wet 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 dust reduction connection seat, a fixed block and a cutting head or cutting drum; the conical cutting tooth includes a shank, a tooth shoulder, a tooth rod and a conical part; 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 part is located on the tooth rod, and a hard alloy 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-insertion tenon is arranged at the bottom; the dust reduction connection seat is provided with an insertion slot, a water distribution interface is arranged on the bottom surface, a dust reduction nozzle is arranged at the rear, and a built-in water channel is arranged inside; the fixed block is used to close the insertion port of the insertion slot. The above-mentioned wet cutting head or cutting drum assembly can increase the anti-bending ability of the cutting tooth, and 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 wet 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. In addition, due to the periodic contact and separation between the pick and the coal rock, the impact phenomenon is very obvious, and is accompanied by the generation of a large amount of dust. This dust diffuses in the closed tunnel, which will increase the dust concentration in the tunnel, reduce visibility, and affect the continuity of work and the health of workers. Therefore, it is very necessary to carry out dust reduction treatment.

[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 wet cutting head or cutting drum assembly with a detachable tooth seat, to increase the bending resistance of the cutting teeth, to achieve a detachable connection between the tooth seat and the cutting head or cutting drum, and to have a dust reduction function.

[0005] To achieve the above-mentioned object, the present invention provides a wet cutting head or cutting drum assembly with a detachable tooth seat, comprising a conical cutting tooth, a conical tooth seat, a dust suppression connecting seat, a fixing block and a cutting head or cutting drum; the conical cutting tooth 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 beams is controlled by parameter equation (1).

[0006]

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

[0008] The bevel tooth seat is provided with a mounting hole that cooperates with the tooth shank, and a quick-insert tenon is provided at the lower part; the dust reduction connecting seat is welded on the cutting head or the cutting drum, and is provided with an insertion groove that cooperates with the quick-insert tenon, a water distribution interface is provided on the bottom surface, a dust reduction nozzle is provided at the rear, and a built-in water channel connecting the water distribution interface and the dust reduction nozzle is provided inside; the fixing block is used to be fixed on the dust reduction connecting seat after the quick-insert tenon and the insertion groove are assembled, and the insertion port of the insertion groove is closed; a connecting end plate for connecting to the cantilever of the cutting machine is provided in the cutting head or the cutting drum, a water inlet is provided on the connecting end plate, a water storage cavity is provided above the connecting end plate, a water distribution hole that cooperates with the water distribution interface is provided on the cavity wall above the connecting end plate, a slag discharge hole is provided on the cavity wall below the connecting end plate, and a slag discharge plug is provided in the slag discharge hole.

[0009] Further, the dust reduction connection seat 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 a cylinder, a cone, a sphere or a spherical table;

[0010] The equation of a cylindrical helix:

[0011]

[0012] Conical segment helix equation:

[0013]

[0014] The equation of the helix of a sphere segment:

[0015]

[0016] 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 The helix angle.

[0017] Furthermore, the area in front of the bevel gear seat that contacts the chips is a separation surface with an obtuse angle; the separation surface is inlaid with wear-resistant dividing blocks that form an acute angle with the horizontal direction; the wear-resistant dividing blocks are made of cemented carbide.

[0018] 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.

[0019] Furthermore, the wet 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.

[0020] 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.

[0021] Furthermore, the boss is a double-conical annular structure, and the angle between the inner and outer conical surfaces and the horizontal plane is 120°.

[0022] 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.

[0023] Furthermore, a fixed block installation position is provided on the dust reduction connecting seat; the fixed block installation position extends forward from the insertion port of the plug-in 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.

[0024] Furthermore, the side surface of the dust reduction connecting seat corresponding to the fixing block installation position 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.

[0025] The beneficial effects of the present invention are:

[0026] In the wet cutting head or cutting drum assembly with the above-mentioned 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 dust reduction connection seat to achieve rapid disassembly and assembly. The fixing block is used to fix on the dust reduction connection seat after the quick-insertion tenon and the insertion slot are assembled, and the insertion port of the insertion slot is closed to ensure the reliable connection between the conical tooth seat and the dust reduction connection seat, and prevent the conical tooth seat from falling off during the cutting process. The dust reduction connecting seat has a built-in water system, which can spray the water in the water storage chamber of the cutting head or cutting drum directly from the dust reduction nozzle at the rear of the dust reduction connecting seat without passing through the conical tooth seat, so as to achieve the purpose of dust suppression, and can also cool the adjacent conical picks arranged behind the conical pick, while reducing the impact on the spray system when the conical tooth seat is disassembled and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An assembly diagram of a wet cutting head or cutting drum assembly with a detachable tooth seat provided by the present invention;

[0028] Figure 2 for Figure 1 A cross-sectional view of the wet cutting head or cutting drum assembly shown (excluding the tapered pick and tapered tooth adapter);

[0029] Figure 3 The exploded view of the conical pick, conical tooth seat, dust suppression connection seat and fixed block;

[0030] Figure 4 for Figure 3 Another direction view of the exploded diagram shown;

[0031] Figure 5 It is a schematic diagram of the structure of a conical pick;

[0032] Figure 6 It is a structural schematic diagram of a bevel gear seat;

[0033] Figure 7 The figure is the assembly drawing of the conical pick and the conical gear adapter;

[0034] Figure 8 It is a cross-sectional view of the dust suppression connection seat and the fixing block;

[0035] Fig. 9 It is the assembly drawing of the bevel gear seat and the dust suppression connection seat;

[0036] Fig.10 for Fig. 9 The cross-sectional view in the AA direction of the assembly drawing shown;

[0037] Fig.11 for Fig. 9 The cross-sectional view of the assembly drawing along the BB direction is shown.

[0038] 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 bending-resistant 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- Dust suppression connection seat; 3.1-insertion slot; 3.2-water distribution interface; 3.3-dust suppression nozzle; 3.4-built-in water channel; 3.5-fixing slot; 3.6-welding slope; 4-fixing block; 4.1-stop key; 5-bushing ring; 5.1-boss shoulder; 6-shaft retaining ring; 7-fixing screw; 8-friction-reducing surface; 9-cutting head or cutting drum; 9.1-connecting end plate; 9.2-water inlet; 9.3-water storage chamber; 9.4-water distribution hole; 9.5-slag discharge plug. DETAILED DESCRIPTION

[0039] The present embodiment provides a wet cutting head or cutting drum assembly with a detachable tooth seat, comprising a conical pick 1, a conical tooth seat 2, a dust suppression connection 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).

[0040]

[0041] Where c is a number greater than 2;

[0042] The bevel gear seat 2 is provided with a mounting hole 2.1 that matches the tooth handle 1.1, and a quick-insertion tenon 2.2 is provided at the lower part; the dust reduction connection seat 3 is welded on the cutting head or cutting drum 9, and is provided with an insertion groove 3.1 that matches the quick-insertion tenon 2.2, a water distribution interface 3.2 is provided on the bottom surface, a dust reduction nozzle 3.3 is provided at the rear, and a built-in water channel 3.4 connecting the water distribution interface 3.2 and the dust reduction nozzle 3.3 is provided inside; the fixing block 4 is used to fix the quick-insertion tenon 2.2 and the insertion groove 3.1 after assembly It is fixed on the dust reduction connection seat 3 and closes the insertion port of the insertion slot 3.1; a connecting end plate 9.1 for connecting to the cantilever of the cutter is arranged in the cutting head or cutting drum 9, a water inlet 9.2 is arranged on the connecting end plate 9.1, a water storage chamber 9.3 is arranged above the connecting end plate 9.1, a water distribution hole 9.4 cooperating with the water distribution interface 3.2 is arranged on the cavity wall above the connecting end plate 9.1, a slag discharge hole is arranged on the cavity wall below the connecting end plate 9.1, and a slag discharge plug 9.5 is arranged in the slag discharge hole.

[0043] In the wet cutting head or cutting drum assembly with the above-mentioned detachable tooth seat, the conical pick 1 is integrally formed of the same material without connecting seams, thereby avoiding the separation of different materials under low-frequency and large 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 dust reduction connection seat 3 to achieve rapid disassembly and assembly. The fixing block 4 is used to fix on the dust reduction connection seat 3 after the quick-insertion tenon 2.2 and the insertion slot 3.1 are assembled, and the insertion port of the insertion slot 3.1 is closed to ensure the reliable connection between the bevel gear seat 2 and the dust reduction connection seat 3, and prevent the bevel gear seat 2 from falling off during the cutting process. The dust reduction connection seat 3 has a built-in water system, which can spray the water in the water storage chamber 9.3 directly from the dust reduction nozzle 3.3 at the rear of the dust reduction connection seat 3 without passing through the bevel gear seat 2, so as to achieve the purpose of dust suppression, and can also cool the adjacent conical pick 1 arranged behind the conical pick 1 at the same time. The slag discharge plug 9.5 closes the slag discharge hole when the cutting head or cutting drum assembly is working, and the slag is taken out from the slag discharge hole when discharging.

[0044] Furthermore, the diameter of the water distribution interface 3.2 is larger than the diameter of the water distribution hole 9.4, ensuring that even if there are welding positioning or manufacturing errors, the water in the water storage chamber 9.3 can be transported to the dust suppression nozzle 3.3 through the water distribution interface 3.2 and the built-in water channel 3.4 and finally sprayed out.

[0045] Furthermore, the dust suppression connection seat 3 is welded on the surface of the cutting head or cutting drum 9 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 spherical table. The spiral line equation of the cylindrical segment is:

[0046]

[0047] Conical segment helix equation:

[0048]

[0049] The equation of the helix of a sphere segment:

[0050]

[0051] 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 The helix angle.

[0052] 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.

[0053] 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.

[0054] Furthermore, the angle between the two side surfaces of the rotation-increasing groove 1.8 is 90-100°.

[0055] 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 teeth are 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°.

[0056] 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°.

[0057] 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.

[0058] Furthermore, the wet 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.

[0059] 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.

[0060] Furthermore, the convex shoulder 5.1 is a double-conical annular structure, and the angle between the inner and outer conical surfaces and the horizontal plane is 120°, which can make the normal load acting on the conical pick 1 during the rock breaking process be evenly distributed on the inner and outer conical surfaces, thereby reducing the contact pressure ratio between the convex shoulder 5.1 and the concave shoulder 1.10. The equilateral triangle formed in the force decomposition process transfers the normal load acting on the conical pick 1 during the rock breaking process to the conical tooth seat 2 through the liner ring 5.

[0061] 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.

[0062] Furthermore, a fixed block installation position is provided on the dust suppression connection seat 3; the fixed block installation position extends forward from the insertion port of the insertion slot 3.1 and is provided with a fixed slot 3.5; a stop key 4.1 is provided on the bottom surface of the fixed block 4 to cooperate with the fixed slot 3.5; screw holes are provided on the fixed slot 3.5 and the stop key 4.1, and a fixing screw 7 passes through the screw hole to fix the fixed block 4 on the fixed block installation position. The setting of the fixed slot 3.5 and the stop key 4.1 effectively prevents the fixed block 4 from falling out of the fixed block installation position.

[0063] Furthermore, the side surface on the dust reduction connecting seat 3 corresponding to the fixing block installation position is a wear-reducing surface 8; the two sides of the fixed 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 dust reduction connecting seat 3, thereby reducing the rotational working resistance of the cutting head or cutting drum 9.

[0064] Furthermore, the bottom surface and the side surface of the dust reduction connection seat 3 are transitionally connected via an inwardly inclined welding slope 3.6, and the dust reduction connection seat 3 can be welded to the surface of the cutting head or the cutting drum 9 via the welding slope 3.6.

[0065] 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 wet cutting drum assembly with a detachable tooth seat, characterized in that: It includes a conical pick, a conical tooth seat, a dust suppression connection 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 dust reduction connection seat is welded on the cutting head or the cutting drum, and is provided with an insertion slot that matches the quick-insertion tenon, a water distribution interface is provided on the bottom surface, a dust reduction nozzle is provided at the rear, and a built-in water channel connecting the water distribution interface and the dust reduction nozzle is provided inside; the fixing block is used to fix on the dust reduction connection seat after the quick-insertion tenon is assembled with the insertion slot, and close the insertion port of the insertion slot; The cutting head or cutting drum is provided with a connecting end plate for connecting with the cantilever of the cutting machine, a water inlet is provided on the connecting end plate, a water storage cavity is provided above the connecting end plate, a water distribution hole matching with the water distribution interface is provided on the cavity wall above the connecting end plate, a slag discharge hole is provided on the cavity wall below the connecting end plate, and a slag discharge plug is provided in the slag discharge hole; The area in front of the bevel gear holder that contacts the chips is a separation surface with an obtuse angle; 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; 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.

2. The wet cutting drum assembly with a detachable tooth seat according to claim 1, characterized in that: The dust reduction connection seat 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 a cylinder, a cone, a sphere or a spherical table; 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 The helix angle.

3. The wet cutting drum assembly with a detachable tooth seat according to claim 1, 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.

4. The wet cutting drum assembly with a detachable tooth seat according to claim 3, 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.

5. The wet cutting drum assembly with a detachable tooth seat according to claim 4, 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.

6. The wet cutting drum assembly with a detachable tooth seat according to claim 5, characterized in that: The boss is a double-conical annular structure, and the angle between the inner and outer cones and the horizontal plane is 120°.

7. The wet cutting drum assembly with a detachable tooth seat according to claim 1, characterized in that: The dust reduction connection 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.

8. The wet cutting drum assembly with a detachable tooth seat according to claim 7, characterized in that: The side surface of the dust reduction connection seat corresponding to the mounting position of the fixed 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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