Alloy wear-resistant small hammer head structure for coal mine stone crusher
By using high-chromium cast iron and high-manganese steel composite materials on the small hammer head of the coal mine crusher, combined with ceramic and tungsten carbide coatings and an arc-shaped design, the problems of wear resistance and adhesion were solved, and the wear resistance and maintenance costs were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU AUBEMA MASCH EQUIP CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-06-02
AI Technical Summary
The small hammers of existing coal mine crushers have poor wear resistance and tend to stick to debris when crushing wet coal or sticky materials, reducing the crushing efficiency.
The impact head is made of high-chromium cast iron and high-manganese steel composite material, with an external ceramic and tungsten carbide coating and an arc-shaped structure. The impact head is detachable and has internal rubber strips and limit strips to improve wear resistance and cushioning effect.
It enhances the wear resistance of the small hammer head, reduces secondary wear, improves striking efficiency, and lowers maintenance costs.
Smart Images
Figure CN224308520U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of coal mine crushing equipment, specifically to an alloy wear-resistant small hammer structure for a coal mine crusher. Background Technology
[0002] Coal ore crushers are machines used to crush coal ore. Common types include ring hammer crushers and hammer crushers. Hammer crushers are equipment that crushes materials by impact. They come in single-rotor and double-rotor forms, with several rows of hanging hammers installed on the main shaft of the crusher.
[0003] The small hammers on the crusher are a very important crushing component. Currently, most small hammers are made of cast iron, which has poor overall wear resistance. The small hammers collide and rub against high-hardness materials (such as coal gangue and ore) for a long time, which leads to increased local wear. Moreover, when crushing wet coal or sticky materials, the debris adheres to the surface of the hammers, reducing the crushing efficiency.
[0004] There is an urgent need for an alloy wear-resistant small hammer structure for coal mine crushers to solve the technical defects mentioned above. Utility Model Content
[0005] The purpose of this invention is to provide an alloy wear-resistant small hammer structure for a coal mine crusher, so as to solve the problem of poor wear resistance mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an alloy wear-resistant small hammer structure for a coal mine crusher, comprising a striking head and a hammer handle rod. The striking head is coated with a ceramic coating, and the ceramic coating is coated with a tungsten carbide coating. Mounting holes are provided on both sides of the top of the striking head. A connecting groove is provided inside the connecting hole of the hammer handle rod, and a rubber strip is installed inside the connecting groove. A connecting seat is fixedly connected to the bottom of the hammer handle rod, and a mounting bolt is threaded onto the connecting seat. Pre-drilled holes are evenly provided on the outside of the striking head.
[0007] As a further technical solution of this utility model, the striking head is composed of a composite of high-chromium cast iron and high-manganese steel.
[0008] As a further technical solution of this utility model, the front end and rear end of the striking head are both arc-shaped structures.
[0009] As a further technical solution of this utility model, the mounting bolts are provided in eight sets, and the mounting bolts are embedded in the mounting holes in a threaded connection.
[0010] As a further technical solution of this utility model, a limiting groove is formed on both sides of the connecting groove, and a limiting strip is fixedly connected to both sides of the rubber strip, with the limiting strip embedded inside the limiting groove.
[0011] As a further technical solution of this utility model, the connecting groove is provided in six sets, and the connecting groove is distributed in a ring shape in the connecting hole of the hammer handle rod.
[0012] Compared with the prior art, the beneficial effects of this utility model are: the alloy wear-resistant small hammer structure used in the coal mine crusher not only achieves the function of enhancing wear resistance and reducing maintenance costs, but also achieves the function of enhancing buffering effect;
[0013] (1) By setting a striking head, ceramic coating, tungsten carbide coating and reserved holes, the striking head is made of high chromium cast iron and high manganese steel and is quenched and tempered to improve the overall hardness. The outer surface of the striking head is protected by a double wear-resistant structure of ceramic coating and tungsten carbide coating to enhance the overall wear resistance. The striking surface adopts an arc design to reduce secondary wear caused by material rebound. The reserved holes evenly opened on the outside of the striking head can use centrifugal force to throw off the adhering material when hammering the material. This structure improves the overall use effect of the small hammer head.
[0014] (2) By setting a striking head, hammer handle rod, connecting seat, mounting hole and mounting bolt, the small hammer head is divided into two parts: the striking head and the hammer handle rod. The striking head used to strike the ore wears out quickly and can be removed and replaced separately. When replacing, simply unscrew the mounting bolts. The eight sets of mounting bolts can enhance the stability of the connection between the striking head and the hammer handle rod. Replacing it after disassembly can reduce the overall maintenance cost.
[0015] (3) By setting a hammer handle rod, a connecting groove, a rubber strip, a limiting groove and a limiting strip, the connecting hole reserved inside the hammer handle rod can be used for connecting the connecting parts inside the crusher. When the hammer handle rod is connected to the connecting parts, the rubber strip inside the connecting groove fits tightly with the outer surface of the connecting parts. The rubber strip can improve the stability of the connection and the buffering effect. The limiting strip outside the rubber strip is embedded in the limiting groove to improve the stability of the fit. This structure realizes the function of facilitating the enhancement of the buffering effect. Attached Figure Description
[0016] Figure 1 This is a frontal cross-sectional view of the present invention.
[0017] Figure 2 This is a side view of the structure of this utility model;
[0018] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;
[0019] Figure 4 This is a frontal cross-sectional view of the striking head of this utility model.
[0020] In the diagram: 1. Strike head; 2. Ceramic coating; 3. Mounting hole; 4. Connecting seat; 5. Hammer handle rod; 6. Connecting groove; 7. Rubber strip; 8. Mounting bolt; 9. Tungsten carbide coating; 10. Reserved hole; 11. Limiting strip; 12. Limiting groove. Detailed Implementation
[0021] 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.
[0022] Please see Figure 1-4 An embodiment of this utility model provides: an alloy wear-resistant small hammer structure for a coal mine crusher, including a striking head 1 and a hammer handle 5. The striking head 1 is provided with a ceramic coating 2 on the outside, and a tungsten carbide coating 9 on the outside of the ceramic coating 2. Mounting holes 3 are provided on both sides of the top of the striking head 1. A connecting groove 6 is provided inside the connecting hole of the hammer handle 5. A rubber strip 7 is installed inside the connecting groove 6. A connecting seat 4 is fixedly connected to the bottom of the hammer handle 5. A mounting bolt 8 is threadedly connected to the connecting seat 4. Pre-reserved holes 10 are evenly provided on the outside of the striking head 1.
[0023] The striking head 1 is made of a composite of high-chromium cast iron and high-manganese steel, and both the front and rear ends of the striking head 1 are arc-shaped structures.
[0024] Specifically, such as Figure 1 and Figure 4 As shown, the striking head 1 is made of high-chromium cast iron and high-manganese steel, and is hardened and tempered to improve the overall hardness. The outer surface of the striking head 1 is protected by a double wear-resistant structure of ceramic coating 2 and tungsten carbide coating 9 to enhance the overall wear resistance. The striking surface adopts an arc design to reduce secondary wear caused by material rebound. The pre-drilled holes 10 evenly opened on the outside of the striking head 1 can use centrifugal force to throw off the adhering material when hammering the material.
[0025] The mounting bolts 8 are provided in eight sets, and the mounting bolts 8 are threadedly connected inside the mounting holes 3.
[0026] Specifically, such as Figure 1 and Figure 2As shown, the small hammer is divided into two parts: the striking head 1 and the hammer handle 5. The striking head 1, which is used to strike the ore, wears out quickly and can be removed and replaced separately. When replacing, simply unscrew the mounting bolts 8. The eight sets of mounting bolts 8 can enhance the stability of the connection between the striking head 1 and the hammer handle 5. Replacing it after disassembly can reduce the overall maintenance cost.
[0027] Limiting grooves 12 are provided on both sides of the connecting groove 6, and limiting strips 11 are fixedly connected to both sides of the rubber strip 7. The limiting strips 11 are embedded in the inside of the limiting grooves 12. There are six sets of connecting grooves 6, and the connecting grooves 6 are distributed in a ring in the connecting hole of the hammer handle rod 5.
[0028] Specifically, such as Figure 1 and Figure 3 As shown, the pre-reserved connection hole inside the hammer handle 5 can be used for connecting the internal connecting parts of the crusher. When the hammer handle 5 is connected to the connecting parts, the rubber strip 7 inside the connecting groove 6 fits tightly with the outer surface of the connecting parts. The rubber strip 7 can improve the stability and buffering effect of the connection. The limiting strip 11 outside the rubber strip 7 is embedded in the limiting groove 12 to improve the stability of the fitting.
[0029] Working principle: The impact head 1 is made of high-chromium cast iron and high-manganese steel, and its overall hardness is improved through quenching and tempering treatment. The outer surface of the impact head 1 is protected by a double wear-resistant structure of ceramic coating 2 and tungsten carbide coating 9 to enhance its overall wear resistance. The impact surface adopts an arc-shaped design to reduce secondary wear caused by material rebound. The pre-drilled holes 10 evenly spaced on the outside of the impact head 1 can use centrifugal force to remove adhering materials when hammering materials. The pre-drilled connecting hole inside the hammer handle 5 can be used for connecting the internal connecting parts of the crusher. When the hammer handle 5 is connected to the connecting parts, the connecting groove... The rubber strip 7 inside the connector fits tightly against the outer surface of the connector. The rubber strip 7 can improve the stability and buffering effect of the connection. The limiting strip 11 outside the rubber strip 7 is embedded in the limiting groove 12 to improve the stability of the fit. The small hammer head is divided into two parts: the striking head 1 and the hammer handle 5. The striking head 1, which is used to strike the ore, wears out quickly. The striking head 1 can be removed and replaced separately. When replacing, simply unscrew the mounting bolts 8. The eight sets of mounting bolts 8 can enhance the stability of the connection between the striking head 1 and the hammer handle 5. Replacing it after disassembly can reduce the overall maintenance cost.
[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A wear-resistant alloy hammer structure for a coal mine crusher, comprising a striking head (1) and a hammer handle rod (5), characterized in that: The striking head (1) is provided with a ceramic coating (2) on the outside, and a tungsten carbide coating (9) is provided on the outside of the ceramic coating (2). Mounting holes (3) are provided on both sides of the top of the striking head (1). A connecting groove (6) is provided inside the connecting hole of the hammer handle (5). A rubber strip (7) is installed inside the connecting groove (6). A connecting seat (4) is fixedly connected to the bottom of the hammer handle (5). A mounting bolt (8) is threaded onto the connecting seat (4). Pre-drilled holes (10) are evenly provided on the outside of the striking head (1).
2. The alloy wear-resistant small hammer structure for a coal mine crusher according to claim 1, characterized in that: The striking head (1) is composed of high-chromium cast iron and high-manganese steel.
3. The alloy wear-resistant small hammer structure for a coal mine crusher according to claim 1, characterized in that: The front and rear ends of the striking head (1) are both arc-shaped structures.
4. The alloy wear-resistant small hammer structure for a coal mine crusher according to claim 1, characterized in that: The mounting bolts (8) are provided in eight sets, and the mounting bolts (8) are threadedly connected inside the mounting holes (3).
5. The alloy wear-resistant small hammer structure for a coal mine crusher according to claim 1, characterized in that: Limiting grooves (12) are provided on both sides of the connecting groove (6), and limiting strips (11) are fixedly connected to both sides of the rubber strip (7). The limiting strips (11) are embedded in the limiting grooves (12).
6. The alloy wear-resistant small hammer structure for a coal mine crusher according to claim 1, characterized in that: The connecting groove (6) is provided in six sets, and the connecting groove (6) is distributed in a ring shape in the connecting hole of the hammer handle rod (5).