Sparkless mining machine cutting pick

Abstract

The utility model discloses a spark-free mining machine cutting pick, and relates to the related technical field of mining machines. The tooth comprises a tooth crown, a tooth body and a clamp spring, 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 in the tooth body along the central axis, a nickel-based alloy hardened layer is uniformly fixed on the peripheral side of the tooth crown, and a hard alloy tool bit is fixed at the top end of the tooth crown. By arranging the tooth crown, the tooth body and the clamp spring, the cutting tooth solves the problems that the tooth body of the cutting tooth of the sparkless mining machine is not high enough in strength and is easy to damage, the crushing capability of the cutting tooth is relatively fast, and the durability is influenced, and has the advantages that the inner reinforcing column is adopted, so that the strength of the tooth body of the cutting tooth of the sparkless mining machine is higher, and the service life of the cutting tooth is prolonged. And the crushing capacity of the tooth crowns is improved through the annular grooves in the fixed disc.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining machines, and in particular relates to a sparkless mining machine cutting tooth. Background Technology

[0002] Sparkless mining cutter picks are special cutting tools designed for high-gas and explosive mining environments. Primarily used in excavators, coal mining machines, and other equipment, they effectively reduce sparks generated during operation, lowering the risk of gas or coal dust explosions. These picks are made of copper-based alloys or other non-ferrous metals to avoid sparks generated during steel-on-steel friction, maintaining good wear resistance while ensuring safety. They are mainly used in high-gas mines, coal and gas outburst areas, and environments with a high risk of coal dust explosions, significantly improving the safety of mining operations. However, sparkless mining cutter picks still have the following drawbacks in practical use:

[0003] The tooth body of the non-sparking excavator cutting tooth is usually made of the same material as the tooth crown. It has high hardness but insufficient bending strength, making it easy to be damaged during operation. This causes the cutting tooth to be easily damaged during bending operations, affecting its durability.

[0004] Secondly, the cutting teeth of the sparkless mining machine directly crush the ore mined by the mining machine after compression. As the work progresses, the periphery of the cutting tooth crown moves smoothly. As the work progresses, after the cutting head wears down to a certain extent, the crushing capacity will decline rapidly, affecting the durability of the cutting teeth. Utility Model Content

[0005] The purpose of this utility model is to provide a cutting tooth for a sparkless mining machine. By setting a tooth crown, tooth body and retaining spring, it solves the problems of insufficient strength of the cutting tooth body, easy damage, and rapid decline in the cutting tooth's crushing capacity, which affects its durability.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a sparkless mining cutter cutter, comprising a crown, a body, and a retaining spring. A fixing plate is fixed to the bottom of the crown, and the body is fixed to the bottom of the fixing plate. An inner reinforcing column is fixed inside the body along the central axis. A nickel-based alloy hardened layer is uniformly fixed to the periphery of the crown, and a carbide cutting head is fixed to the top of the crown. During operation, the crown provides wear resistance, and the carbide cutting head provides the main function of cutting ore and other structures. The inner reinforcing column increases the strength of the body, and the retaining spring cooperates to install the body and the cutter holder during operation.

[0008] Furthermore, a port is provided at the center of the top of the crown, the carbide cutting head is fixed inside the port, and the upper part of the carbide cutting head extends out of the port. The port at the center of the top of the crown is used to fix the carbide cutting head, and the upper part of the cutting head extends out of the port to directly contact the ore, so as to achieve efficient crushing. This design ensures that the cutting head is firmly embedded in the crown, while the protruding part preferentially bears the impact, thus extending the life of the crown.

[0009] Furthermore, the diameter of the crown gradually increases from the top to the bottom, the diameter of the fixing disk is larger than the diameter of the bottom of the crown, and an annular groove is provided on the periphery of the fixing disk. The crown adopts a conical design (small at the top and large at the bottom) to enhance structural stability. The diameter of the fixing disk is further enlarged and an annular groove is provided. The annular groove increases the concave and convex structure on the outside of the crown, generating additional shear force when crushing ore and improving crushing efficiency.

[0010] Furthermore, a limiting plate is fixed at the bottom end of the tooth body. The diameter of the tooth body is smaller than the diameter of the fixed plate. The limiting plate at the bottom end of the tooth body and the fixed plate form a snap ring mounting area. The diameter of the tooth body is smaller than that of the fixed plate to leave assembly space. The limiting plate prevents the snap ring from falling off and at the same time constrains the axial displacement of the snap ring to ensure the positioning accuracy of the cutting tooth on the cutting tooth holder.

[0011] Furthermore, the inner diameter of the retaining ring is equal to the diameter of the tooth body. The retaining ring is disposed between the fixed plate and the limiting plate. The retaining ring is interference-fitted with the tooth body and can rotate and slide. The retaining ring and the tooth body are interference-fitted but can rotate and slide, which ensures the installation tightness and allows for fine adjustment of the angle to adapt to mining stress. The double limiting structure of the fixed plate and the limiting plate disperses the force on the retaining ring and avoids local deformation failure.

[0012] Furthermore, the top of the retaining ring has an upper opening, and the bottom of the retaining ring has a lower opening. The upper and lower openings are connected, and the upper and lower openings of the retaining ring form an interlaced channel, which enhances the elastic deformation capacity and facilitates installation. The corner design at the opening improves the structural strength, prevents the retaining ring from breaking under high pressure, and maintains a stable clamping force on the tooth body.

[0013] This utility model has the following beneficial effects:

[0014] This invention solves the problem of insufficient strength and easy damage of the cutting tooth body in sparkless mining machines by setting a tooth crown and tooth body. The tooth body is installed on the cutting tooth seat with a retaining spring. During mining operations, the carbide cutting head of the cutting tooth compresses the corresponding ore. During the process of cutting the ore, the internal reinforcing column increases the installation stability between the tooth body and the cutting tooth seat, thereby increasing the overall strength of the cutting tooth.

[0015] This invention solves the problem of rapid decline in the crushing capacity of cutting teeth in sparkless mining machines, which affects durability, by setting up a tooth crown, tooth body, and retaining spring. The tooth body and the retaining spring on it are fitted together and installed on the cutting tooth holder. After the cutting tooth is installed in a suitable position on the cutting tooth holder, during mining, the carbide cutter head first enters the ore or other structure, then the tooth crown contacts the ore or other structure, and the nickel-based alloy hardened layer on the tooth crown contacts the ore. Subsequently, the fixing plate at the bottom of the tooth crown contacts the ore or other structure. The annular groove on the periphery of the fixing plate increases the friction and shearing force with the ore contact structure, thereby increasing the crushing effect and durability of the cutting tooth when the tooth crown is crushing the ore. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional view of the assembly structure of a sparkless mining machine cutting teeth;

[0018] Figure 2 A three-dimensional structural diagram of a tooth crown;

[0019] Figure 3 A three-dimensional structural view of a cemented carbide cutting tip;

[0020] Figure 4 This is a three-dimensional view of the tooth body after it has been cut open.

[0021] Figure 5 This is a three-dimensional structural diagram of a snap ring.

[0022] Figure label:

[0023] 1. Tooth crown; 101. Fixed plate; 102. Ring groove; 103. Nickel-based alloy hardened layer; 104. End port; 2. Carbide cutting tip; 3. Tooth body; 301. Inner reinforcing post; 302. Limiting plate; 4. Snap ring; 401. Upper opening; 402. Lower opening. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0025] Please see Figure 1-4 This utility model is a sparkless mining cutter cutter, including a tooth crown 1, a tooth body 3, and a retaining spring 4. A fixing plate 101 is fixed to the bottom end of the tooth crown 1. The tooth crown 1 bears friction during mining operations. The fixing plate 101 connects the tooth crown 1 and the tooth body 3 together. The tooth body 3 is fixed to the bottom end of the fixing plate 101 and is used for installing the cutter. An inner reinforcing column 301 is fixed along the central axis inside the tooth body 3 to increase the strength of the tooth body 3. A nickel-based alloy hardening layer 103 is uniformly fixed to the periphery of the tooth crown 1 to increase the hardness of the tooth crown 1. A carbide cutter head 2 is fixed to the top of the tooth crown 1 to provide a crushing effect during mining operations.

[0026] Specifically, a port 104 is provided at the center of the top of the crown 1, the carbide cutting head 2 is fixed in the port 104, and the upper part of the carbide cutting head 2 extends out of the port 104. The crown 1 fixes the carbide cutting head 2 through the port 104.

[0027] Furthermore, the diameter of the crown 1 gradually increases from the top to the bottom. The diameter of the fixed disk 101 is larger than the diameter of the bottom of the crown 1. An annular groove 102 is provided on the periphery of the fixed disk 101. The annular groove 102 on the fixed disk 101 increases the friction and shearing force on the outside of the crown 1, thereby increasing the crushing effect.

[0028] Furthermore, a limiting plate 302 is fixed at the bottom of the tooth body 3. The diameter of the tooth body 3 is smaller than the diameter of the fixed plate 101. The tooth body 3 restricts the position of the retaining ring 4 on the tooth body 3 through the limiting plate 302.

[0029] The operation process of this embodiment is as follows: During operation, the tooth body 3 is installed on the cutting tooth seat with the snap ring 4. During mining operations, the carbide cutting head 2 of the cutting tooth squeezes the corresponding ore, etc. During the process of cutting the ore, the inner reinforcing column 301 increases the installation stability between the tooth body 3 and the cutting tooth seat, and increases the overall strength of the cutting tooth. Specific Implementation Example 2

[0030] Please see Figure 1 , 2 Based on the specific embodiment one, the inner diameter of the retaining ring 4 is equal to the diameter of the tooth body 3. The retaining ring 4 is set between the fixed plate 101 and the limiting plate 302. The retaining ring 4 is interference-fitted with the tooth body 3 and can rotate and slide. In operation, the retaining ring 4 provides an auxiliary installation function by being set between the fixed plate 101 and the limiting plate 302 and sleeved around the tooth body 3.

[0031] Specifically, the top of the snap ring 4 has an upper opening 401 and the bottom of the snap ring 4 has a lower opening 402. The upper opening 401 and the lower opening 402 are connected. The snap ring 4 forms an interlaced opening structure between the upper opening 401 and the lower opening 402, which is used to fit and lock onto the tooth crown 1. The strength is increased by the two corners at the upper opening 401 and the lower opening 402.

[0032] The operation process of this embodiment is as follows: During operation, the tooth body 3 and the retaining spring 4 on the tooth body 3 are fitted together and installed on the cutting tooth seat. After the cutting tooth is installed in a suitable position on the cutting tooth seat, when the cutting tooth of the mining machine is mining, the carbide cutter head 2 first enters the ore and other structures, and then the tooth crown 1 contacts the ore and other structures. The nickel-based alloy hardened layer 103 on the tooth crown 1 contacts the ore, and then the fixed plate 101 at the bottom of the tooth crown 1 contacts the ore and other structures. The annular groove 102 on the periphery of the fixed plate 101 increases the friction and shearing force with the ore contact structure, thereby increasing the crushing effect when the tooth crown 1 crushes the ore.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sparkless mining cutter cutting tooth, comprising a tooth crown (1), a tooth body (3), and a retaining spring (4), characterized in that: The bottom end of the crown (1) is fixed with a fixing plate (101), the bottom end of the fixing plate (101) is fixed with a tooth body (3), the inside of the tooth body (3) is fixed with an inner reinforcing column (301) along the central axis, the periphery of the crown (1) is uniformly fixed with a nickel-based alloy hardened layer (103), and the top end of the crown (1) is fixed with a carbide cutting tip (2).

2. The sparkless mining cutter cutting tooth according to claim 1, characterized in that: The crown (1) has a port (104) at the center of its top, the carbide cutting head (2) is fixed inside the port (104), and the upper part of the carbide cutting head (2) extends out of the port (104).

3. The sparkless mining cutter cutting tooth according to claim 1, characterized in that: The diameter of the crown (1) gradually increases from the top to the bottom. The diameter of the fixing plate (101) is larger than the diameter of the bottom of the crown (1), and the fixing plate (101) has an annular groove (102) on its periphery.

4. The sparkless mining cutter cutting tooth according to claim 1, characterized in that: The bottom end of the tooth body (3) is fixed with a limiting disk (302), and the diameter of the tooth body (3) is smaller than the diameter of the fixing disk (101).

5. The sparkless mining cutter cutting tooth according to claim 4, characterized in that: The inner diameter of the retaining ring (4) is equal to the diameter of the tooth body (3). The retaining ring (4) is disposed between the fixed plate (101) and the limiting plate (302). The retaining ring (4) is interference-fitted with the tooth body (3) and can rotate and slide.

6. The sparkless mining cutter cutting tooth according to claim 1, characterized in that: The top of the snap ring (4) has an upper opening (401), and the bottom of the snap ring (4) has a lower opening (402). The upper opening (401) and the lower opening (402) are connected.

Images