A wear-resistant hammer head structure of a crusher for underground mines

Abstract

The utility model discloses a kind of crusher wear-resistant hammer head structures for underground mine, including hammer handle, the hammer handle is cast with high steel material quality, the surface of the hammer handle is provided with mounting hole, the inner wall of the mounting hole is equipped with key groove, the utility model relates to crusher technical field.This crusher wear-resistant hammer head structure for underground mine, by tungsten carbide alloy hammer head body+ceramic wear-resistant coating+the multiple-material collaborative structure of copper alloy wear-resistant bushing, constructs full contact surface wear-resistant protection system, wear resistance has been significantly improved, compared with traditional hammerhead life is greatly extended, reduce the frequency of replacement frequently in underground, reduce maintenance cost, by being provided with connecting assembly, utilize fastening bolt, locknut and gasket with limiting block, cooperate the limiting groove of hammer handle and hexagonal positioning groove, multiple anti-loosening ensure not loose during high-speed crushing, modular design makes hammer head assembly disassembly simple, adapt to narrow space in underground, shorten operation and maintenance time.

Description

Technical Field

[0001] This utility model relates to the field of crusher technology, specifically to a wear-resistant hammer structure for crushers used in underground mining. Background Technology

[0002] The reference patent title is: A Wear-Resistant Hammerhead for a Hammer Crusher (Authorization Announcement No.: CN217288654U, Authorization Announcement Date: 2022.08.26). It includes a hammerhead body and a fixed base. One end of the hammerhead body has an integrally formed hammer handle. The bottom surface of the hammer handle has a mounting groove that threadedly engages with the fixed base. Four first positioning holes are provided on each of the four planes. The surface of the fixed base has a second positioning hole. A first positioning bolt is provided in both the first and second positioning holes. A limit nut is threadedly connected to the insertion end of the first positioning bolt. The side surface of the hammerhead body is covered with a reinforcing layer made of high-chromium cast iron, giving the hammerhead body high wear resistance and extending its service life. When the working surface of the hammerhead body is severely worn, the hammerhead body can be disassembled and the hammer handle rotated to replace the working surface, allowing the hammerhead body to continue to be used and extending its service life.

[0003] Based on the above document: In mining operations, underground mining crushers are one of the key pieces of equipment, mainly used to crush the ore mined underground, providing convenience for subsequent ore transportation and processing. As the core working component of the crusher, the hammer head is in direct contact with the ore. Under the special working conditions of high humidity, dust, and narrow space underground, it needs to withstand huge impact and friction forces. Therefore, the requirements for the wear resistance, structural stability and ease of assembly of the hammer head are extremely high.

[0004] Existing underground mining crusher hammers mostly adopt an integral structure, usually made of ordinary alloy steel or single high-manganese steel. On the one hand, the integral structure has poor wear resistance. When crushing ores with high hardness, the hammers are prone to wear and cracking, resulting in a short service life, generally only 2-3 months, requiring frequent replacement. This not only increases maintenance workload but also raises equipment operating costs. On the other hand, the existing hammer assembly structure design is unreasonable. During high-speed rotation crushing, assembly loosening is prone to occur, leading to a decrease in crushing efficiency and even causing safety accidents. In addition, although some hammers have attempted to improve wear resistance, the complex structural design and high manufacturing cost make it difficult to meet the needs of large-scale underground mining operations. Therefore, this utility model provides a wear-resistant hammer structure for underground mining crushers. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a wear-resistant hammer structure for underground mining crushers, solving the problem of poor wear resistance in existing underground mining crusher hammers.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant hammer head structure for a crusher used in underground mining, comprising a hammer handle made of high-manganese steel, a mounting hole on the surface of the hammer handle, a keyway on the inner wall of the mounting hole, an assembly groove on the end face of one end of the hammer handle, and a hammer head assembly fixedly connected to the hammer handle via a connecting component. The hammer head assembly comprises a hammer head body made of tungsten carbide alloy, with multiple sets of anti-slip protrusions installed on the arc-shaped surface of the hammer head body, a reinforcing block integrally formed on one side of the hammer head body, symmetrical reinforcing members integrally formed on the surface of the reinforcing block, and an assembly block integrally formed on one side of the reinforcing block, the assembly block being adapted to the assembly groove.

[0007] Preferably, the surface of the hammerhead body is coated with a ceramic wear-resistant coating, the thickness of which is 0.5-1mm.

[0008] Preferably, the connecting assembly includes a fastening bolt, a lock nut, and a limiting washer. The fastening bolt passes through the hammer handle and the assembly block, and the lock nut is threadedly connected to the fastening bolt and presses against the surface of the limiting washer.

[0009] Preferably, a plurality of limiting grooves are provided on one side of the hammer handle, and a plurality of limiting blocks are provided on the inner side of the limiting pad, wherein the limiting blocks are adapted to the limiting grooves.

[0010] Preferably, a symmetrical hexagonal positioning groove is provided on the other side of the hammer handle, and the hexagonal positioning groove is adapted to the hexagonal head of the fastening bolt.

[0011] Preferably, a wear-resistant bushing is provided in the mounting hole. The wear-resistant bushing is made of copper alloy and is interference-fitted with the mounting hole. The inner wall of the wear-resistant bushing has a bushing groove that matches the keyway.

[0012] Beneficial effects This utility model provides a wear-resistant hammerhead structure for underground mining crushers. Compared with the prior art, it has the following advantages: 1. The wear-resistant hammer structure of this underground mining crusher is constructed through a multi-material collaborative structure of tungsten carbide alloy hammer body + ceramic wear-resistant coating + copper alloy wear-resistant bushing, which builds a full-contact surface wear-resistant protection system. The wear resistance is significantly improved, the service life is greatly extended compared with traditional hammers, the number of frequent replacements underground is reduced, and the maintenance cost is reduced.

[0013] 2. The wear-resistant hammer structure of this underground mining crusher is equipped with connecting components. It uses fastening bolts, anti-loosening nuts and washers with limit blocks, along with the limit groove and hexagonal positioning groove of the hammer handle. Multiple anti-loosening measures ensure that it does not loosen during high-speed crushing. The modular design makes the hammer assembly easy to disassemble and assemble, adapts to the narrow space underground, and shortens the operation and maintenance time. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the external structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the exploded structure of this utility model; Figure 3 This is a three-dimensional schematic diagram of the hammer head assembly of this utility model; Figure 4 This is a three-dimensional schematic diagram of the connecting component of this utility model.

[0015] In the diagram: 1-Hammer handle, 2-Mounting hole, 3-Keyway, 4-Assembly groove, 5-Connecting component, 51-Fastening bolt, 52-Anti-loosening nut, 53-Limiting washer, 6-Hammer head assembly, 61-Hammer head body, 62-Anti-slip protrusion, 63-Reinforcing block, 64-Reinforcing component, 65-Assembly block, 7-Limiting groove, 8-Limiting block, 9-Hexagonal positioning groove, 10-Wear-resistant bushing. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-4 This utility model provides a technical solution: A wear-resistant hammer structure for an underground mining crusher includes a hammer handle 1, which is cast from high-manganese steel. The surface of the hammer handle 1 has a mounting hole 2, and the inner wall of the mounting hole 2 has a keyway 3. One end face of the hammer handle 1 has an assembly groove 4. The hammer handle 1 is fixedly connected to a hammer head assembly 6 via a connecting component 5. The hammer head assembly 6 includes a hammer head body 61, which is made of tungsten carbide alloy. Multiple sets of anti-slip protrusions 62 are installed on the arc-shaped surface of the hammer head body 61. A reinforcing block 63 is integrally formed on one side of the hammer head body 61. A symmetrical reinforcing member 64 is integrally formed on the surface of the reinforcing block 63. An assembly block 65 is integrally formed on one side of the reinforcing block 63, and the assembly block 65 is adapted to the assembly groove 4.

[0018] High manganese steel has excellent toughness and impact resistance, and can withstand the huge impact force generated when crushing ore underground, thus preventing the hammer handle 1 from breaking. The anti-slip bump 62 can increase the friction between the hammer and the ore, prevent the ore from slipping during impact crushing, and improve crushing efficiency; By using a multi-material collaborative structure of tungsten carbide alloy hammerhead body, ceramic wear-resistant coating, and copper alloy wear-resistant bushing, a full-contact surface wear-resistant protection system is constructed, which significantly improves wear resistance and greatly extends the life of traditional hammerheads, reducing the number of frequent replacements downhole and lowering maintenance costs.

[0019] Preferably, the surface of the hammerhead body 61 is coated with a ceramic wear-resistant coating, the thickness of which is 0.5-1mm.

[0020] Preferably, the connecting assembly 5 includes a fastening bolt 51, a lock nut 52, and a limiting washer 53. The fastening bolt 51 passes through the hammer handle 1 and the assembly block 65. The lock nut 52 is threadedly connected to the fastening bolt 51 and presses against the surface of the limiting washer 53.

[0021] The limiting washer 53 adopts a combination structure of spring washer and flat washer. The flat washer can increase the clamping area of ​​the bolt and protect the surface of the hammer handle 1 and the assembly block 65 from damage. Preferably, a plurality of limiting grooves 7 are provided on one side of the hammer handle 1, and a plurality of limiting blocks 8 are provided on the inner side of the limiting pad 53, the limiting blocks 8 being adapted to the limiting grooves 7.

[0022] Preferably, a symmetrical hexagonal positioning groove 9 is provided on the other side of the hammer handle 1, and the hexagonal positioning groove 9 is adapted to the hexagonal head of the fastening bolt 51.

[0023] The hexagonal positioning groove 9 is adapted to the hexagonal head of the fastening bolt 51, so that the hexagonal head of the fastening bolt 51 can be embedded therein, avoiding the bolt head from protruding, reducing the space occupied during installation, and preventing the bolt from rotating during operation. Preferably, a wear-resistant bushing 10 is provided inside the mounting hole 2. The wear-resistant bushing 10 is made of copper alloy. The wear-resistant bushing 10 is interference-fitted with the mounting hole 2. The inner wall of the wear-resistant bushing 10 is provided with a bushing groove that matches the keyway 3.

[0024] The wear-resistant bushing 2 is made of ZCuSn10P1 tin bronze, which has good wear resistance and friction reduction properties, and can reduce the wear between the mounting hole 2 and the rotor shaft. By incorporating a connecting component 5, fastening bolts 51, anti-loosening nuts 52, and washers with limiting blocks 8, along with the limiting groove 7 and hexagonal positioning groove 9 of the hammer handle 1, multiple anti-loosening measures ensure that the hammer does not loosen during high-speed crushing. The modular design makes the hammer assembly 6 easy to assemble and disassemble, adaptable to narrow underground spaces, and shortens maintenance time.

[0025] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0026] During assembly, the wear-resistant bushing 10 is first pressed into the mounting hole 2 of the hammer handle 1 to ensure that the bushing groove is aligned with the keyway 3. Then, the assembly block 65 of the hammer head assembly 6 is embedded into the assembly groove 4 of the hammer handle 1. Next, the fastening bolt 51 is passed through the hammer handle 1 and the assembly block 65, and its hexagonal head is embedded into the hexagonal positioning groove 9. The upper limit washer 53 is put on to ensure that the limit block 8 is embedded into the limit groove 7. Finally, the anti-loosening nut 52 is screwed on and tightened to complete the entire assembly process.

[0027] When used underground, the hammer is installed on the crusher rotor shaft through the mounting hole 2. The key on the rotor shaft passes through the bushing groove and the keyway 3 to achieve circumferential fixation. After the crusher is started, the hammer rotates at high speed with the rotor. The arc-shaped surface of the hammer body 61 contacts the ore. The anti-slip protrusion 62 prevents the ore from slipping. The ceramic wear-resistant coating and the tungsten carbide alloy material work together to resist the impact and friction of the ore. The reinforcing block 63 and the reinforcing member 64 enhance the overall strength of the hammer. The connecting component 5 ensures that the hammer handle 1 and the hammer assembly 6 are firmly connected.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant hammerhead structure for an underground mine crusher, characterized in that, The hammer includes a hammer handle (1), which is made of high-manganese steel. The surface of the hammer handle (1) is provided with a mounting hole (2), and the inner wall of the mounting hole (2) is provided with a keyway (3). One end face of the hammer handle (1) is provided with an assembly groove (4). The hammer handle (1) is fixedly connected to a hammer head assembly (6) through a connecting component (5). The hammer head assembly (6) includes a hammer head body (61), which is made of tungsten carbide alloy. The arc surface of the hammer head body (61) is equipped with multiple sets of anti-slip protrusions (62). A reinforcing block (63) is integrally formed on one side of the hammer head body (61). A symmetrical reinforcing member (64) is integrally formed on the surface of the reinforcing block (63). An assembly block (65) is integrally formed on one side of the reinforcing block (63). The assembly block (65) is adapted to the assembly groove (4).

2. The wear-resistant hammerhead structure for an underground mine crusher according to claim 1, characterized in that: The surface of the hammerhead body (61) is coated with a ceramic wear-resistant coating, the thickness of which is 0.5-1mm.

3. The wear-resistant hammerhead structure for an underground mine crusher according to claim 1, characterized in that: The connecting assembly (5) includes a fastening bolt (51), a lock nut (52), and a limiting washer (53). The fastening bolt (51) passes through the hammer handle (1) and the assembly block (65). The lock nut (52) is threadedly connected to the fastening bolt (51) and presses against the surface of the limiting washer (53).

4. The wear-resistant hammerhead structure for an underground mine crusher according to claim 3, characterized in that: The hammer handle (1) has multiple sets of limiting grooves (7) on one side, and the limiting pad (53) has multiple sets of limiting blocks (8) on the inner side, and the limiting blocks (8) are adapted to the limiting grooves (7).

5. The wear-resistant hammerhead structure for an underground mine crusher according to claim 3, characterized in that: The hammer handle (1) has a symmetrical hexagonal positioning groove (9) on the other side, which is adapted to the hexagonal head of the fastening bolt (51).

6. The wear-resistant hammerhead structure for an underground mine crusher according to claim 1, characterized in that: The mounting hole (2) is provided with a wear-resistant bushing (10), which is made of copper alloy. The wear-resistant bushing (10) is interference-fitted with the mounting hole (2), and the inner wall of the wear-resistant bushing (10) is provided with a bushing groove that matches the keyway (3).

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