Anti-fracture cutting pick

Abstract

The utility model discloses an anti-fracture cutting pick, and particularly relates to the technical field of cutting picks, the anti-fracture cutting pick comprises a pick front assembly, an anti-stress mechanism and a connecting assembly, the anti-stress mechanism is installed below the pick front assembly, the connecting assembly is installed below the anti-stress mechanism, the anti-stress mechanism comprises a groove body assembly and a buffer assembly, and the groove body assembly is connected with the buffer assembly. A buffer assembly is installed below the groove body assembly, the overall stress distribution path of the cutting tooth is changed through a concave groove block of the groove body assembly, and a prismatic groove in the outer diameter surface of the groove body assembly can be connected with an elastic buffer ring in a clamping groove mode, so that the elastic buffer ring does not slide in the rotating process of the cutting tooth, and the cutting tooth is prevented from falling off. And the prismatic grooves can also transfer peak stress borne by the cutting pick to the buffer assembly area from the root of the boss, so that the cutting pick is prevented from being broken during operation.

Description

Technical Field

[0001] This utility model relates to the field of cutting tooth technology, and more specifically, to a fracture-resistant cutting tooth. Background Technology

[0002] Cutting teeth are key components installed on mining equipment such as coal mining machines and tunneling machines for crushing coal and rock. They are usually composed of a tooth body and a carbide cutter head. The tooth body is generally made of high-strength alloy steel and has good toughness and strength, which can withstand the huge impact force during the mining process. The cutting teeth are welded to the front end with carbide cutter heads. The mining equipment uses its high hardness and high wear resistance to achieve efficient cutting and crushing of coal and rock.

[0003] A search revealed that publication number CN222615334U discloses a composite cemented carbide coal mining cutter. This cutter uses multiple detachable sheaths for sacrificial wear to protect the tooth body, eliminating the need for complete tooth replacement and reducing replacement costs. It includes a shank, a tooth body, and a tooth head. The shank and tooth body are integrally formed, with the tooth body concentrically positioned at the end of the shank. The tooth head is mounted at the top of the tooth body. It also includes multiple sheaths, which are detachably mounted on the outer wall of the tooth body, with the outer surfaces of each sheath extending beyond the outer surface of the tooth body. The inventors discovered the following problems with the existing technology during the development of this invention:

[0004] When existing cutting picks are driven by mining equipment, they cut and break the ore by rotating. During this process, the cutting picks are subjected to the reaction force of the ore, which is transmitted throughout the entire cutting pick. During this transmission, the stress is concentrated at the transition between the boss and the tooth body, which makes the connection between the boss at the front and rear ends of the cutting pick prone to breakage. This shortens the service life of the cutting pick and increases the cost of replacing it. Furthermore, the breakage of the cutting pick can also interrupt the mining operation, thereby prolonging the mining period and increasing the construction costs for workers.

[0005] Therefore, a fracture-resistant cutting tooth is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a fracture-resistant cutting tooth to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fracture-resistant cutting tooth, comprising a front tooth assembly, a stress-resistant mechanism, and a connecting assembly. The stress-resistant mechanism is installed below the front tooth assembly, and the connecting assembly is installed below the stress-resistant mechanism. The stress-resistant mechanism includes a groove assembly and a buffer assembly, and the buffer assembly is installed below the groove assembly.

[0008] Preferably, the tooth pre-assembly includes a tooth tip, a fixing platform, and a fixing post, with the fixing platform installed below the tooth tip and the fixing post installed below the fixing platform.

[0009] Preferably, the groove assembly includes a connecting groove block, a concave groove block, and a prismatic groove, and the concave groove block is installed below the connecting groove block, and the outer diameter surface of the concave groove block is grooved with a prismatic groove.

[0010] Preferably, the buffer assembly includes an elastic buffer ring, mounting blocks, and flow guide grooves, wherein the inner diameter surface of the elastic buffer ring is fitted with mounting blocks, and the sidewall of the elastic buffer ring is chiseled with flow guide grooves.

[0011] Preferably, the connecting component includes a connecting post, a mounting slot, and a positioning hole, and the mounting slot is installed below the connecting post, and the mounting slot has a positioning hole cut into its side wall.

[0012] Preferably, the side wall of the connecting column is drilled with fixing bolt holes, and the lower end of the connecting column is drilled with a threaded groove, and a rubber pad is laid on the top of the threaded groove.

[0013] Preferably, the cone angle of the tooth tip is 70°±2° to 90°±2°, and the tooth tip and the fixed platform are fixed by a pin connector, wherein the tensile strength of the pin connector is ≥800MPa.

[0014] Preferably, the elastic buffer ring is made of TPE rubber, and the interference fit tolerance between the inner diameter of the elastic buffer ring and the mounting block is H7 / s6. The inner wall of the guide groove is provided with a continuous guide thread with a helix angle of 30°±5° and a thread depth of 0.5-1.2mm.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. Compared with the prior art, this anti-fracture cutting tooth changes the stress distribution path of the entire cutting tooth by using the concave groove block of the groove assembly. The prismatic groove on its outer diameter surface can be connected with the elastic buffer ring, so that the elastic buffer ring will not slip during the rotation of the cutting tooth. In addition, the prismatic groove can also transfer the peak stress on the cutting tooth from the root of the boss to the buffer assembly area, thereby preventing the cutting tooth from breaking during operation.

[0017] 2. Compared with the prior art, this anti-fracture cutting tooth absorbs the stress at the root of the cutting tooth boss through the elastic buffer ring of the buffer component by its own elastic deformation. The elastic buffer ring adopts an interference fit and anti-slip ridge design to ensure that it will not fall off during long-term use. When the elastic buffer ring needs to be replaced due to wear, only the elastic buffer ring needs to be replaced, without scrapping the entire cutting tooth.

[0018] 3. Compared with the prior art, this anti-fracture cutting tooth is connected by a threaded groove chiseled at the lower end of the connecting column, and the connecting part of the mining equipment and the side wall of the connecting column are secondary connected and fixed by fixing bolts to prevent damage to the threaded groove in the cutting tooth, so that the cutting tooth can fall directly from the mining equipment into the mining site. In addition, the rubber pad above the threaded groove can absorb the vibration generated by the cutting tooth during mining, ensuring that the mining equipment will not be damaged by the reaction force when the cutting tooth collides with the ore during use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall front view structure of an anti-fracture cutting tooth according to the present invention.

[0020] Figure 2 This is a front cross-sectional view of the front component of a fracture-resistant cutting tooth according to the present invention.

[0021] Figure 3 This is a top view schematic diagram of a buffer assembly for preventing breakage of cutting teeth according to the present invention.

[0022] Figure 4 This utility model provides a fracture-resistant cutting tooth. Figure 1 A schematic diagram of the structure at point A.

[0023] Figure 5 This is a schematic diagram of the inner wall structure of a connecting column for an anti-fracture cutting tooth according to the present invention.

[0024] The attached figures are labeled as follows: 1. Tooth front assembly; 2. Stress-resistant mechanism; 3. Connecting assembly; 4. Groove assembly; 5. Buffer assembly; 6. Tooth tip; 7. Fixing platform; 8. Fixing column; 9. Connecting groove block; 10. Concave groove block; 11. Prismatic groove; 12. Elastic buffer ring; 13. Mounting prism block; 14. Guide groove; 15. Connecting column; 16. Mounting groove block; 17. Positioning hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] As attached Figures 1 to 5 The fracture-resistant cutting tooth shown includes a front tooth assembly 1, a stress-resistant mechanism 2, and a connecting assembly 3. The stress-resistant mechanism 2 is installed below the front tooth assembly 1, and the connecting assembly 3 is installed below the stress-resistant mechanism 2. The stress-resistant mechanism 2 includes a groove assembly 4 and a buffer assembly 5. The buffer assembly 5 is installed below the groove assembly 4.

[0028] Specifically: When workers use mining equipment to mine ore in a mine, they first need to assemble and fix the cutting tooth with its own connecting component 3 and the driving component of the mining equipment. After fixing, the workers need to start the mining equipment to mine the ore. The driving component of the mining equipment will drive the cutting tooth to rotate, thereby cutting and breaking the ore. During this process, the tooth front component 1 will come into contact with the ore surface and transfer the stress to the stress-resistant mechanism 2. The groove component 4 in the stress-resistant mechanism 2 will change the stress distribution path and transfer the peak stress from the root of the boss to the buffer component 5, thereby protecting the root of the boss and preventing the cutting tooth from breaking.

[0029] Example 2

[0030] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 5 As shown below, see details:

[0031] In a preferred embodiment, the tooth front assembly 1 includes a tooth tip 6, a fixed platform 7, and a fixed column 8. The fixed platform 7 is welded to the bottom of the tooth tip 6, and the fixed column 8 is welded to the bottom of the fixed platform 7. When the worker uses the mining equipment to mine, the drive component of the mining equipment will drive the tooth tip 6 of the tooth front assembly 1 to rotate and chisel the mine. During the chiseling process, the tooth tip 6 will transfer the interaction force with the surface of the mine, and the tooth tip 6 will transfer the stress given to it by the ore to the fixed column 8 through the fixed platform 7. The fixed column 8 is connected to the stress-resistant mechanism 2 by heat fusion, so the fixed column 8 will transfer the stress to the stress-resistant mechanism 2.

[0032] In a preferred embodiment, the tank assembly 4 includes a connecting slot 9, a concave slot 10, and a prismatic slot 11. The concave slot 10 is welded and installed below the connecting slot 9. The outer diameter surface of the concave slot 10 is slotted with the prismatic slot 11. When the fixing column 8 transmits stress to the connecting slot 9 of the tank assembly 4, the connecting slot 9 will continue to transmit the stress downward to the concave slot 10. The concave slot 10 will change the stress distribution path and transfer the peak stress from the root of the boss to the buffer assembly 5. The tank assembly 4 and the buffer assembly 5 are connected by the prismatic slot 11.

[0033] In a preferred embodiment, the buffer assembly 5 includes an elastic buffer ring 12, mounting blocks 13, and a flow guide 14. The mounting blocks 13 are mounted on the inner diameter surface of the elastic buffer ring 12, and the flow guide 14 is carved into the side wall of the elastic buffer ring 12. The trough assembly 4 transmits stress to the elastic buffer ring 12 through the mounting blocks 13, and the elastic buffer ring 12 absorbs the transmitted stress, thereby preventing the cutting tooth from breaking. During the mining process, the surface of the trough assembly 4 is covered with a large amount of slag. The flow guide 14 is a trough that extends from the trough assembly 4 to the outer diameter surface of the elastic buffer ring 12. The trough has a spiral design and can discharge the slag accumulated on the surface of the trough assembly 4 from the elastic buffer ring 12 through the centrifugal force generated by the rotation of the cutting tooth itself.

[0034] In a preferred embodiment, the connecting assembly 3 includes a connecting post 15, a mounting slot 16, and a positioning hole 17. The mounting slot 16 is welded to the bottom of the connecting post 15. The mounting slot 16 has a positioning hole 17 cut into its side wall. When the cutting tooth is installed on the mining equipment, the worker needs to place the mounting slot 16 of the connecting assembly 3 into the cutting tooth mounting slot of the mining equipment, then place the threaded rod of the connecting part of the mining equipment into the mounting slot 16, and screw the cutting tooth to make the threaded rod and the inside of the connecting post 15 threadedly connected. The positioning pin is passed through the positioning hole 17 to align the two. When the drive assembly of the mining equipment drives the cutting tooth to rotate, the torque is transmitted to the entire cutting tooth through the connecting post 15.

[0035] In a preferred embodiment, the side wall of the connecting column 15 is drilled with fixing bolt holes, the lower end of the connecting column 15 is drilled with a threaded groove, and a layer of rubber pad is laid on the top of the threaded groove. When the worker needs to fix the cutting tooth to the top of the mining equipment, he needs to first fix the connecting column 15 to the drive assembly of the mining equipment through the threaded groove, and then use fixing bolts to pass through the fixing bolt holes to fix the two for a second time. When the mining equipment is in use, the cutting tooth will collide with the ore and generate vibration. The rubber pad can absorb the vibration transmitted by the cutting tooth and prevent it from reducing the mining efficiency of the mining equipment.

[0036] In a preferred embodiment, the cone angle of the tooth tip 6 is 70°±2° to 90°±2°, and the middle part of the tooth tip 6 is made of alloy steel with excellent toughness. The tooth tip 6 and the fixed platform 7 are fixed by a pin connector. The tensile strength of the pin connector is ≥800MPa, which can effectively break coal and rock and resist wear. The middle part can evenly transfer the cutting force borne by the carbide head at the front end of the tooth tip 6 to the tooth body of the cutting tooth, while buffering the impact on the carbide head and reducing the risk of its breakage.

[0037] In a preferred embodiment, the elastic buffer ring 12 is made of TPE rubber, and the interference fit tolerance between the inner diameter of the elastic buffer ring 12 and the mounting block 13 is H7 / s6. The inner wall of the guide groove 14 is provided with a continuous guide thread with a helix angle of 30°±5° and a thread depth of 0.5-1.2mm.

[0038] The working process of this utility model is as follows: First, when the worker uses the mining equipment to mine ore in the mine, he needs to first put the mounting slot block 16 of the cutting tooth self-connecting component 3 into the cutting tooth mounting slot of the mining equipment, and then thread the threaded groove inside the mining equipment and the cutting tooth connecting column 15. After the connection is completed, the positioning pin is passed through the positioning hole 17 to align the two. Finally, the fixing bolt is passed through the fixing bolt hole of the connecting column 15 to fix the two for a second time. After the fixing is completed, the worker needs to start the mining equipment to mine the mine. The driving component of the mining equipment transmits torque to the entire cutting tooth through the connecting column 15, causing the tooth tip 6 of the tooth front component 1 to rotate and chisel the mine. During the chiseling process, the tooth tip 6 will interact with the surface of the mine and transmit the stress given to it by the ore through the fixing platform 7 to the fixing column 8. The fixing column 8 and the stress-resistant mechanism 2. Through heat fusion connection, the fixed column 8 will transfer the stress to the connecting groove block 9 of the groove assembly 4, and the connecting groove block 9 will further transfer the stress downward to the concave groove block 10. The concave groove block 10 will change the stress distribution path. Since the prismatic groove 11 of the groove assembly 4 and the mounting prismatic block 13 of the buffer assembly 5 are connected by a slot, the concave groove block 10 will transfer the peak stress from the root of the boss to the elastic buffer ring 12. The elastic buffer ring 12 will absorb the transferred stress, thereby preventing the cutting tooth from breaking. In addition, during the mining process, the surface of the groove assembly 4 will be covered with a large amount of slag. The guide groove 14 is a groove that extends from the concave groove block 10 to the outer diameter surface of the elastic buffer ring 12. Its groove has a spiral design, which allows the slag accumulated on the surface of the groove assembly 4 to be discharged from the elastic buffer ring 12 by the centrifugal force generated by the rotation of the cutting tooth itself. The above is the working principle of this anti-breakage cutting tooth.

Claims

1. A fracture-resistant cutting tooth, comprising a front tooth assembly (1), a stress-resistant mechanism (2), and a connecting assembly (3), characterized in that: A stress-resistant mechanism (2) is installed below the front tooth assembly (1), and a connecting assembly (3) is installed below the stress-resistant mechanism (2). The stress-resistant mechanism (2) includes a groove assembly (4) and a buffer assembly (5), and a buffer assembly (5) is installed below the groove assembly (4).

2. The anti-fracture cutting tooth according to claim 1, characterized in that: The tooth pre-assembly (1) includes a tooth tip (6), a fixing platform (7) and a fixing post (8), and the fixing platform (7) is installed below the tooth tip (6), and the fixing post (8) is installed below the fixing platform (7).

3. The anti-fracture cutting tooth according to claim 1, characterized in that: The groove assembly (4) includes a connecting groove block (9), a concave groove block (10) and a prismatic groove (11), and the concave groove block (10) is installed below the connecting groove block (9), and the outer diameter surface of the concave groove block (10) is grooved with a prismatic groove (11).

4. The anti-fracture cutting tooth according to claim 1, characterized in that: The buffer assembly (5) includes an elastic buffer ring (12), a mounting block (13) and a flow guide groove (14), and the inner diameter surface of the elastic buffer ring (12) is equipped with the mounting block (13), and the side wall of the elastic buffer ring (12) is chiseled with a flow guide groove (14).

5. The anti-fracture cutting tooth according to claim 1, characterized in that: The connecting component (3) includes a connecting post (15), a mounting slot (16) and a positioning hole (17), and the mounting slot (16) is installed below the connecting post (15), and the mounting slot (16) has a positioning hole (17) slotted in the side wall.

6. The anti-fracture cutting tooth according to claim 5, characterized in that: The side wall of the connecting column (15) is drilled with fixing bolt holes, and the lower end of the connecting column (15) is drilled with a threaded groove, and a layer of rubber pad is laid on the top of the threaded groove.

7. The anti-fracture cutting tooth according to claim 2, characterized in that: The cone angle of the tooth tip (6) is 70°±2° to 90°±2°, and the tooth tip (6) and the fixed platform (7) are fixed by a pin connector, the tensile strength of which is ≥800MPa.

8. The anti-fracture cutting tooth according to claim 4, characterized in that: The elastic buffer ring (12) is made of TPE rubber, and the interference fit tolerance between the inner diameter of the elastic buffer ring (12) and the mounting block (13) is H7 / s6. The inner wall of the guide groove (14) is provided with a continuous guide thread with a helix angle of 30°±5° and a thread depth of 0.5-1.2mm.

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