CN-224200648-U - Spark-free cutting pick of mining machine

Abstract

The utility model discloses a cutting pick of a sparkless mining machine, and relates to the technical field of mining machines. The novel tooth crown comprises a tooth crown body, a clamp spring and a tooth body, wherein a fixed disc is fixed at the bottom end of the tooth crown, the tooth body is fixed at the bottom end of the fixed disc, an inner reinforcing column is fixed inside the tooth body along a central axis, a nickel-based alloy hardening layer is uniformly fixed on the periphery of the tooth crown, and a hard alloy cutter head is fixed at the top end of the tooth crown. The utility model solves the problems that the strength of the pick body of the sparkless excavator is not high enough and is easy to damage, the pick breaking capacity slides down fast and the durability is affected by arranging the crown, the pick body and the clamp spring.

Inventors

• DONG CHANGHUA
• DONG CHANGHUI
• DONG JIANFU
• HOU JIHAO
• WANG XILIANG

Assignees

• 新乡市三牛机械锻造有限公司

Dates

Publication Date

20260505

Application Date

20250721

Claims (6)

1. 1. The cutting pick of the sparkless mining machine comprises a tooth crown (1), a tooth body (3) and a clamp spring (4) and is characterized in that a fixed disc (101) is fixed at the bottom end of the tooth crown (1), the tooth body (3) is fixed at the bottom end of the fixed disc (101), an inner reinforcing column (301) is fixed inside the tooth body (3) along a central axis, a nickel-based alloy hardening layer (103) is uniformly fixed on the periphery of the tooth crown (1), and a hard alloy cutter head (2) is fixed at the top end of the tooth crown (1).
2. 2. A sparkless cutting pick according to claim 1, wherein a port (104) is provided in the center of the tip of the crown (1), the carbide tip (2) is fixed in the port (104), and the upper portion of the carbide tip (2) protrudes out of the port (104).
3. 3. A sparkless cutting pick according to claim 1, wherein the crown (1) has a diameter gradually increasing from the top to the bottom, the diameter of the fixing disc (101) is larger than the diameter of the bottom of the crown (1), and a circumferential groove (102) is formed in the circumferential side of the fixing disc (101).
4. 4. A cutting pick for a sparkless mining machine according to claim 1, wherein the bottom end of the pick body (3) is fixed with a limit disc (302), and the diameter of the pick body (3) is smaller than the diameter of the fixed disc (101).
5. 5. A sparkless cutting pick according to claim 4, wherein the inner diameter of the snap spring (4) is equal to the diameter of the pick body (3), the snap spring (4) is arranged between the fixed disc (101) and the limiting disc (302), and the snap spring (4) is in interference fit with the pick body (3) and can rotate and slide.
6. 6. The sparkless cutting pick of the mining machine according to claim 1, wherein an upper opening (401) is formed in the top end of the clamp spring (4), a lower opening (402) is formed in the bottom end of the clamp spring (4), and the upper opening (401) is communicated with the lower opening (402).

Description

Spark-free cutting pick of mining machine Technical Field The utility model belongs to the technical field related to mining machines, and particularly relates to a cutting pick of a sparkless mining machine. Background The cutting pick of the sparkless mining machine is a special cutting tool special for high-gas and explosive mine environments, is mainly used for equipment such as mining machines, coal mining machines and the like, can effectively reduce sparks generated in the operation process, reduces the explosion risk of gas or coal dust, is made of copper-based alloy or other nonferrous metal materials, avoids sparks generated when steel rubs, still keeps good wear resistance on the premise of ensuring safety, is mainly applied to high-gas mine, coal and gas protruding areas and coal dust explosion dangerous environments, can obviously improve the safety of mining operation, but has the following defects in actual use: The body of the cutting pick of the sparkless excavator is usually made of the same material as the crown of the cutting pick, the hardness is higher, but the bending strength is insufficient, the cutting pick is easy to damage in the bending work, and the durability of the cutting pick is affected; Secondly, after the cutting pick of the sparkless excavator is directly extruded, ore and the like extracted by the excavator are crushed, along with the progress of work, the peripheral side of the crown of the cutting pick moves smoothly, along with the progress of work, after a part of the cutter head is worn, the crushing capacity can slide down rapidly, and the durability of the cutting pick is affected. Disclosure of utility model The utility model aims to provide a cutting pick of a sparkless excavator, which solves the problems that the strength of the cutting pick body of the sparkless excavator is not high enough and is easy to damage, the cutting pick breaking capacity slides down faster and the durability is affected by arranging a crown, a pick body and a clamp spring. In order to solve the technical problems, the utility model is realized by the following technical scheme: The utility model relates to a cutting pick of a sparkless mining machine, which comprises a tooth crown, a tooth body and a clamp spring, wherein a fixed disc is fixed at the bottom end of the tooth crown, a tooth body is fixed at the bottom end of the fixed disc, an inner reinforcing column is fixed inside the tooth body along a central axis, a nickel-based alloy hardening layer is uniformly fixed on the periphery of the tooth crown, a hard alloy cutter head is fixed at the top end of the tooth crown, in operation, the tooth crown is used for providing wear resistance, and the hard alloy cutter head is used for providing the main function of cutting ores and other structures, the tooth body is used for increasing the strength of the tooth body through the inner reinforcing column, and in operation of the clamp spring, the tooth body and the cutting pick seat are installed in a matched manner. Further, the port is formed in the center of the top end of the tooth crown, the hard alloy cutter head is fixed in the port, the port is extended out of the upper portion of the hard alloy cutter head, the port in the center of the top end of the tooth crown is used for fixing the hard alloy cutter head, the port is extended out of the upper portion of the cutter head to directly contact ores, efficient crushing is achieved, the cutter head is firmly embedded into the tooth crown through the design, meanwhile, the protruding portion is preferentially impacted, and the service life of the tooth crown is prolonged. Further, the crown is from top to bottom diameter increase gradually, the diameter of fixed disk is greater than the diameter of crown bottom to the annular has been seted up to the week side of fixed disk, and the crown adopts toper design (top is little, the bottom is big) reinforcing structural stability, and the fixed disk diameter further enlarges and sets up the annular, and the annular increases the concave-convex structure in the crown outside, produces extra shear force when broken ore, promotes crushing efficiency. Further, the bottom end fixing of tooth body has the limiting plate, the diameter of tooth body is less than the diameter of fixed disk, and the limiting plate of tooth body bottom forms jump ring installation interval with the fixed disk, and tooth body diameter is less than the fixed disk in order to leave the assembly space, and the limiting plate prevents that the jump ring from droing, retrains jump ring axial displacement simultaneously, ensures the positioning accuracy of pick on the pick box. Further, the inner diameter of the clamp spring is equal to the diameter of the tooth body, the clamp spring is arranged between the fixed disc and the limiting disc, the clamp spring is in interference fit with the tooth body and can rotationally slide, the clamp spring is in interference