Hammer head for a hammer crusher

Abstract

The utility model relates to a broken equipment technical field, concretely is a kind of hammer head of hammer crusher, including hammer handle and the hammer body being set below hammer handle, both form fan-shaped hammer head structure, the front end of hammer body is striking end, and hammer handle includes sleeve, connecting portion and first triangular part, and three integrally formed;Hammer body includes second triangular part, arc part and reinforcing part, and three integrally formed, reinforcing part is set in the striking end of hammer body, and reinforcing part is connected with the connecting position of second triangular part, arc part with circular arc transition respectively;Second triangular part and the long side of first triangular part are oppositely arranged.The hammer head of hammer crusher in this, the integrally formed design of "sleeve-connecting portion-first triangular part" of hammer handle, the integrally formed design of "second triangular part-arc part-reinforcing part" of hammer body, eliminates the weak node of existing splicing structure, greatly improves the structural integrity of hammer handle and hammer body respectively.

Description

Technical Field

[0001] This utility model relates to the field of crushing equipment technology, specifically to a composite hammer head for a hammer crusher. Background Technology

[0002] As a core crushing equipment in industries such as mining, chemical, and building materials, the hammer crusher's hammerhead is a key component that directly contacts the material and performs the crushing function. The performance of the hammerhead (wear resistance, toughness, and structural stability) directly determines the crushing efficiency, operating costs, and continuous operation capability of the crusher. In actual working conditions, the hammerhead must withstand the centrifugal inertial force under high-speed rotation, as well as the high-frequency impact, shearing, and extrusion actions with the material. Therefore, the impact area in contact with the material must have excellent wear resistance to resist wear, while the non-impact area (hammer handle) connected to the crusher's shaft must have good toughness and mechanical strength to avoid fracture. This places stringent requirements on the selection of hammerhead materials and structural design.

[0003] Existing hammer crusher hammers mainly fall into two technical categories, but both have significant drawbacks: Firstly, there are hammerheads made from a single material in one piece. These hammerheads are made from a single metal (such as ordinary cast steel, ordinary cast iron, or high-chromium alloy), which cannot simultaneously meet the dual requirements of wear resistance and toughness. If ordinary cast steel or cast iron is used, although the overall toughness can be guaranteed to withstand impact, the material has poor wear resistance. The hammerhead's striking end will experience severe wear after a short period of use, resulting in a rapid reduction in the effective crushing area and a significant decrease in crushing efficiency. Frequent shutdowns for replacement are required, which not only increases labor and spare parts costs but also seriously disrupts the production rhythm. If wear-resistant materials such as high-chromium alloys are used, although the wear resistance of the striking end can be improved, the material's toughness is insufficient. Under high-speed rotation and the impact of large materials, the connection area between the hammer handle and the hammer body is prone to rigid fracture, posing a safety risk of hammerhead detachment and damage to the crusher.

[0004] Secondly, bimetallic composite hammerheads. To address the limitations of single-material hammerheads, the industry has developed bimetallic composite technology. This involves using ordinary cast steel / cast iron with good toughness for the hammer handle, while the hammer body (impact area) uses wear-resistant materials such as high-chromium alloys. A typical example is the "high wear-resistant hammer crusher hammerhead" disclosed in patent CN222076753U, which improves service life to some extent by combining a hammer handle with a wear-resistant alloy hammer body and adding an extension to the impact area of ​​the hammer body to increase the wear volume. However, these bimetallic hammerheads still have the following key technical defects that restrict their performance improvement: Poor structural layout and stress matching: The existing bimetallic hammerheads' hammer handle and hammer body shapes are not fully designed to take into account the material crushing trajectory and stress distribution patterns. For example, the hammer body of CN222076753U only expands the wear area through the extension section, without designing a transition structure to address the stress concentration problem at the striking end, making the striking end prone to cracks due to excessive local stress. At the same time, the shape matching degree of the connection area between the hammer handle and the hammer body (such as the convex-groove fit or simple bolt connection used in CN222076753U) is low, resulting in uneven stress during high-speed rotation and easily causing fatigue damage in the connection area.

[0005] Insufficient wear resistance and deformation resistance: Existing bimetallic hammers rely solely on the wear resistance of the material itself, without further enhancing wear resistance and deformation resistance through surface structural reinforcement. During long-term crushing operations, the hammer surface is prone to dents and deformation due to material impact, leading to increased crushing gaps, decreased crushing efficiency, and the inability to disperse wear stress through structural design, thus shortening the effective service life of the hammer.

[0006] Low connection reliability and ease of maintenance: On the one hand, the connection structure of existing technologies such as CN222076753U (such as direct bolt insertion and convex-groove fitting) lacks targeted reinforcement design (such as reinforcing blocks in the connection area), which is prone to problems such as bolt loosening and convex wear under high-frequency impact, posing a safety hazard of hammer body falling off; on the other hand, detachable bimetallic hammer heads generally lack a precise positioning structure, and the relative position of the hammer body and hammer handle needs to be repeatedly adjusted during installation, resulting in low replacement efficiency and long downtime.

[0007] Insufficient precise matching of materials and structure: Although some bimetallic hammerheads adopt a material-specific design, the structural form is not optimized according to the functional differences between the hammer handle (non-striking area) and the hammer body (striking area) (e.g., the hammer handle is not designed with a triangular part or sleeve structure to match the hammer body). As a result, the material performance cannot be fully utilized through the structural layout. For example, the toughness of the hammer handle is not converted into stable support for the hammer body, and the wear resistance of the hammer body does not cover the high wear area. Utility Model Content

[0008] The purpose of this invention is to provide a composite hammer head for a hammer crusher to solve the problems mentioned in the background art, such as the hammer handle and hammer body shape design of existing bimetallic hammer heads not fully combining the material crushing trajectory and stress distribution law.

[0009] To achieve the above objectives, this utility model provides a composite hammer head for a hammer crusher, comprising a hammer handle and a hammer body disposed below the hammer handle, forming a fan-shaped hammer head structure. The front end of the hammer body is the striking end. The hammer handle includes a sleeve, a connecting part, and a first triangular part, all three being integrally formed. The hammer body includes a second triangular part, an arc-shaped part, and a reinforcing part, all three being integrally formed. The reinforcing part is disposed at the striking end of the hammer body, and the connection positions between the reinforcing part and the second triangular part and the arc-shaped part are respectively transitioned by an arc. The long sides of the second triangular part and the first triangular part are arranged opposite each other.

[0010] This design incorporates an integrated molding of the hammer handle's "sleeve-connecting part-first triangular part" and the hammer body's "second triangular part-arc part-reinforcing part," eliminating weak points in existing spliced ​​structures (such as bolt connections and protrusion-groove fittings) and significantly improving the overall structural integrity of both the hammer handle and hammer body. Compared to the separate connection method of the hammer handle and hammer body in existing technologies (which is prone to bolt loosening and protrusion wear), this design can effectively resist centrifugal inertial forces and material impacts under high-speed rotation, reducing the risk of the hammer head falling off due to structural splicing and extending the overall service life of the hammer head.

[0011] Preferably, the hammer handle and the hammer body are integrally formed and prepared by a two-stage regional casting process. The hammer handle is a cast iron hammer handle, and the hammer body is a high-chromium alloy hammer body. Multiple spines are respectively provided on the front and rear sides of the hammer body, and the spines are integrally formed with the hammer body.

[0012] This design achieves integrated molding through two separate casting processes, resolving the issue of weak bonding at the interface of the bimetallic hammerhead; the cast iron hammer handle ensures toughness and impact resistance, while the high-chromium alloy hammer body enhances wear resistance, precisely matching functional requirements; the integrated spindle strengthens the surface rigidity of the hammer body, resisting impact deformation.

[0013] Preferably, the spines are distributed in an array along the surface of the hammer body, and are arranged in a stepped manner from the front end to the rear end of the hammer body.

[0014] This design features a spine array and a stepped arrangement to adapt to the stress distribution of the hammer body—strengthening support in the high-stress area at the front end and reducing weight at the rear end; it does not obstruct material flow, balances strength and lightweight, and reduces the load on the rotating shaft.

[0015] Preferably, the front and rear surfaces of the hammer body are respectively provided with ridges, the ridges are arranged in an arc and pass through all the vertebrae on their respective surfaces, and the ridges are integrally formed with the hammer body.

[0016] This feature incorporates an arc-shaped ridge bar that forms a mesh structure through the spine, enhancing the hammer's overall impact and deformation resistance. The arc design adapts to the material trajectory, avoiding obstruction of the crushing process and balancing structural reinforcement with operational efficiency.

[0017] Preferably, the hammer body is provided with a plurality of T-shaped locking blocks, and the hammer handle is provided with T-shaped locking slots corresponding to the T-shaped locking blocks one by one. The hammer body is locked into the T-shaped locking slots by the T-shaped locking blocks and is fixedly connected by bolt assembly.

[0018] This feature includes a T-shaped locking block and slot for quick positioning, shortening installation time; a lateral limit to prevent axial displacement of the hammer body, improving connection stability; and a detachable design that allows for individual replacement of worn hammer bodies, reducing spare parts costs.

[0019] Preferably, reinforcing blocks are provided on the front and rear sides of the T-shaped card block, and on the front and rear sides of the hammer handle between adjacent T-shaped card slots.

[0020] This reinforcement block specifically strengthens the connection area, preventing wear and cracking of the locking block / slot; it also distributes the stress on the bolts, preventing bolt overload and breakage, and improving connection reliability.

[0021] Preferably, the hammer body and hammer handle are provided with corresponding through holes, the through holes penetrating the middle of the T-shaped locking block and the T-shaped locking groove, and the bolt assembly is inserted into the through holes.

[0022] This design features a through-hole that runs through the core connection area, resulting in more even bolt stress and preventing loosening due to impact; it also balances disassembly and connection strength, ensuring the stability of the hammer body.

[0023] Preferably, a relief groove is provided at the through hole at the front end of the hammer handle, and an abutment boss is provided at the through hole at the rear end of the hammer handle. The bolt of the bolt assembly passes through the through hole at the front end of the hammer handle and is locked and fixed at the abutment boss by a nut.

[0024] This feature allows the slot to accommodate the bolt cap, preventing it from becoming loose due to wear; it also abuts against the boss to support the nut, ensuring uniform preload, preventing loosening due to long-term vibration, and improving the long-term reliability of the connection.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: In this composite hammerhead for a hammer crusher, the integrated design of the hammer shank's "sleeve-connecting part-first triangular part" and the hammer body's "second triangular part-arc part-reinforcing part" eliminates the weak points of existing spliced ​​structures (such as bolted connections and convex-groove fittings), significantly improving efficiency. This design enhances the structural integrity of both the hammer handle and the hammer body. Compared to the separate connection method of the hammer handle and hammer body in the existing technology (which is prone to bolt loosening and wear of protruding edges), this design can effectively resist the centrifugal inertial force and material impact under high-speed rotation, reduce the risk of the hammer head falling off due to breakage at the structural joint, and extend the overall service life of the hammer head.

[0026] The reinforced section of the hammer's striking end acts directly on the core crushing area, significantly increasing the structural thickness and effective load-bearing volume of the striking end. It can directly withstand the high-frequency impact and compression of materials, slowing down the wear rate of the striking end—avoiding the problem of reduced effective crushing area and decreased crushing efficiency caused by rapid wear of the striking end in existing hammers. At the same time, the rounded transition between the reinforced section and the second triangular and arc-shaped sections replaces the rigid design of right-angle / acute-angle connections in existing technologies. This disperses local stress concentration at the striking end, preventing the initiation and propagation of cracks caused by stress concentration, further improving the fatigue resistance of the hammer's striking end, and avoiding premature failure of the striking end.

[0027] The layout of the second triangular section opposite the long side of the first triangular section precisely matches the force transmission path between the hammer handle and the hammer body: the impact stress on the hammer body during crushing operations can be evenly transmitted to the first triangular section through the long side of the second triangular section, and then transmitted to the sleeve (connected to the crusher shaft) through the connecting part, achieving gradient dispersion of stress. This design solves the problem of local fatigue damage caused by uneven stress in the existing hammer head connection area; at the same time, the rigid structure of the triangular section provides stable support for the hammer body, ensuring that the hammer body is not easily deformed under high-speed rotation and impact, maintaining the effective crushing shape of the hammer head, and ensuring long-term stability of crushing efficiency.

[0028] The fan-shaped structure formed by the hammer handle and hammer body, combined with the adaptability of the arc-shaped part to the material movement trajectory, can reduce ineffective impact caused by material slippage, and enable the material to form effective contact with the hammer body's striking end (reinforced part) and arc-shaped part, thereby improving crushing efficiency. In addition, the coordinated design of various components (such as triangular support, arc-shaped material guide, and wear-resistant reinforcement) makes the overall force on the hammer head more uniform, avoiding early failure caused by local overload, further extending the service life of the hammer head, and reducing downtime and maintenance costs caused by frequent hammer head replacements. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the main view of the hammer body and hammer handle integrally formed without the spindle or other structures of this utility model. Figure 2 This is a schematic diagram of the main view of the detachable connection between the hammer body and the hammer handle of this utility model; Figure 3 for Figure 2 Schematic diagram of cross-section; Figure 4 This is an isometric view of the detachable connection between the hammer body and the hammer handle of this utility model. Figure 5 This is an exploded view of the detachable connection between the hammer body and the hammer handle of this utility model. The meanings of the labels in the diagram are as follows: 1. Hammer handle; 2. Hammer body; 3. Sleeve; 4. Connecting part; 5. First triangular part; 6. Second triangular part; 7. Arc-shaped part; 8. Reinforcing part; 9. Spine; 10. Rib; 11. T-shaped locking block; 12. T-shaped locking groove; 13. Reinforcing block; 14. Relief groove; 15. Abutting boss; 16. Bolt assembly. Detailed Implementation

[0030] 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.

[0031] This utility model provides a composite hammerhead for a hammer crusher, such as... Figures 1-5 As shown, the hammer includes a handle 1 and a hammer body 2 located below the handle 1, which together form a fan-shaped hammer head structure. The front end of the hammer body 2 is the striking end. The handle 1 includes a sleeve 3, a connecting part 4, and a first triangular part 5, which are integrally formed. The hammer body 2 includes a second triangular part 6, an arc-shaped part 7, and a reinforcing part 8, which are integrally formed. The reinforcing part 8 is located at the striking end of the hammer body 2, and the connection positions of the reinforcing part 8 with the second triangular part 6 and the arc-shaped part 7 are respectively connected by a rounded transition. The long sides of the second triangular part 6 and the first triangular part 5 are arranged opposite each other.

[0032] The integrated molding design of the hammer handle's "sleeve-connecting part-first triangular part" and the hammer body's "second triangular part-arc-reinforcing part" completely eliminates the gaps and weak points of spliced ​​structures (such as bolted connections and protruding ridges). This effectively resists the centrifugal inertial force under high-speed rotation and the high-frequency impact of materials, avoiding the risk of hammer body detachment due to loosening and wear at splicing points in existing hammerheads. This significantly improves the overall structural rigidity and fracture resistance of the hammerhead. The reinforcing part at the striking end directly thickens the core crushing area, greatly increasing the effective wear volume of the striking end and delaying the reduction of the effective crushing area caused by wear, thus avoiding the problem of short-term wear failure in existing hammerheads. At the same time, the rounded transition design between the reinforcing part and the second triangular part and the arc-shaped part replaces the right-angle / acute-angle connection of the existing technology, which can disperse the local stress concentration at the striking end, prevent crack initiation and propagation, further improve the fatigue resistance of the striking end, and avoid early cracking. The design of the second triangular section, with its long side opposite to that of the first triangular section, precisely matches the stress transmission requirements of the hammer handle and the hammer body. The impact stress borne by the hammer body can be evenly transmitted to the hammer handle through the long side of the triangular section, and then transmitted to the sleeve (connected to the rotating shaft) through the connecting part, achieving stress gradient dispersion and solving the problem of local fatigue damage caused by uneven stress in the existing hammer head connection area. At the same time, the rigid structure of the triangular section provides stable support for the hammer body, ensuring that the hammer body is not easily deformed under high-speed impact and maintaining stable crushing pattern. The fan-shaped structure formed by the hammer handle and the hammer body, combined with the guiding effect of the arc-shaped section on the material movement trajectory, can reduce ineffective impact caused by material slippage, allowing the material to make efficient contact with the impact end (reinforcement part) and the arc-shaped section, improving the single crushing success rate. Compared with the existing non-fan-shaped structure, the fan-shaped structure better conforms to the circumferential movement trajectory of the material inside the crusher, further reducing crushing energy consumption and improving the overall operating efficiency of the equipment.

[0033] In this embodiment, the hammer handle 1 and the hammer body 2 are integrally formed using a two-stage regional casting process. The hammer handle 1 is a cast iron handle, and the hammer body 2 is a high-chromium alloy hammer body. Multiple spines 9 are provided on the front and rear surfaces of the hammer body 2, and the spines 9 are integrally formed with the hammer body 2. The spines 9 are arrayed along the surface of the hammer body 2, and are arranged in a stepped manner, gradually descending from the front end to the rear end of the hammer body 2. Ridges 10 are provided on the front and rear surfaces of the hammer body 2, and the ridges 10 are arranged in an arc shape and pass through all the spines 9 on their respective surfaces. The ridges 10 are integrally formed with the hammer body 2.

[0034] The hammer handle (cast iron) and hammer body (high-chromium alloy) are integrally molded using a two-stage, zone-casting process. This avoids the poor bonding issues caused by inadequate interface temperature control in existing bimetallic hammerheads, ensuring the fusion strength of the hammer handle and hammer body connection surface and preventing hammer body detachment. Furthermore, the high toughness of the cast iron hammer handle can withstand centrifugal force and impact under high-speed rotation, preventing hammer handle breakage, while the high hardness and wear resistance of the high-chromium alloy hammer body resists material abrasion. This achieves a precise performance match of "toughness guarantee in non-impact areas + wear resistance enhancement in impact areas," significantly extending the service life compared to single-material hammerheads. The integrally molded spines on the front and rear surfaces of the hammer body directly enhance the structural rigidity of the hammer body surface, resisting dents and deformation caused by material impact, avoiding the problems of increased crushing gaps and decreased efficiency caused by surface deformation in existing hammerheads. Simultaneously, the spine array distribution disperses localized wear on the hammer body surface, reducing excessive wear at single points and further extending the effective service life of the hammer body. The stepped arrangement of the spines, gradually descending from the front (impact end) to the rear of the hammer, precisely matches the structural shape of the second triangular section. This design ensures that material flow along the hammer surface is not obstructed, while the high-stress front (impact end) is reinforced by the spine density and height, and the structure is simplified and weight reduced at the low-stress rear, achieving "on-demand reinforcement." This balances structural strength and lightweight design, reducing the load on the crusher shaft. The arc-shaped ridges, forming a mesh structure through all the spines, transform the local reinforcement of individual spines into an overall increase in the rigidity of the hammer surface, further enhancing the hammer's impact and deformation resistance. Simultaneously, the arc design adapts to the hammer's fan-shaped structure and material movement trajectory, preventing the ridges from obstructing material flow due to right-angle designs, ensuring a smooth crushing process, and balancing structural reinforcement with operational efficiency.

[0035] Furthermore, the hammer body 2 is provided with multiple T-shaped locking blocks 11, and the hammer handle 1 is provided with T-shaped locking slots 12 corresponding to the T-shaped locking blocks 11. The hammer body 2 is inserted into the T-shaped locking slots 12 through the T-shaped locking blocks 11 and fixedly connected by bolt assemblies 16. Reinforcing blocks 13 are provided on the front and rear sides of the T-shaped locking blocks 11 and on the front and rear sides of the hammer handle 1 between adjacent T-shaped locking slots 12. Through holes are provided on the hammer body 2 and the hammer handle 1, respectively, penetrating the middle of the T-shaped locking blocks 11 and the T-shaped locking slots 12, and the bolt assemblies 16 are inserted into the through holes. A relief groove 14 is provided at the through hole at the front end of the hammer handle 1, and an abutment boss 15 is provided at the through hole at the rear end of the hammer handle 1. The bolts of the bolt assembly 16 are inserted into the through holes from the front end of the hammer handle 1 and locked in place by nuts at the abutment boss 15.

[0036] The one-to-one correspondence between the T-shaped locking blocks and the slots allows for quick alignment of the hammer body and hammer handle during installation, avoiding the need for repeated adjustments required by existing detachable hammer heads and significantly reducing installation time. Simultaneously, the anti-disengagement characteristic (lateral limiting) of the T-shaped structure prevents axial displacement of the hammer body during high-speed rotation, improving connection stability and mitigating the risk of misalignment in existing connections. The reinforcing block design in the connection area enhances local load-bearing capacity: reinforcing blocks on both sides of the T-shaped locking blocks and between the T-shaped slots specifically strengthen the structural strength of the connection area—preventing wear or cracking of the locking blocks and slots due to high-frequency impacts, thus solving the problem of fatigue damage in the connection area of ​​existing detachable structures. At the same time, the reinforcing blocks distribute the stress on the bolt assembly, preventing bolt breakage due to localized overload, further improving connection reliability. A through-hole runs through the T-shaped locking block and the center of the slot, allowing the bolt assembly to directly lock the core connection area between the hammer body and the hammer handle. Compared to existing surface bolt connections, this provides more direct and even force distribution, effectively resisting bolt loosening caused by impact. The rigid connection of the bolt assembly balances disassembly and connection strength, meeting the need for individual replacement of the hammer body after wear, thus reducing spare parts costs. The clearance groove at the front end of the hammer handle accommodates the bolt cap, preventing the bolt from protruding from the hammer handle surface and loosening due to material wear or impact, solving the problem of existing exposed bolts being prone to failure. The abutment boss at the rear end of the hammer handle provides stable support for the nut, ensuring uniform preload during bolt tightening, preventing nut loosening due to vibration during long-term use, further improving the long-term reliability of the connection and reducing maintenance frequency.

[0037] In use, the composite hammerhead of this hammer crusher is first fitted onto the rotating shaft of the hammer crusher using the hammer handle sleeve 3. The sleeve and shaft are fitted together to ensure coaxial fixation, guaranteeing that the hammerhead rotates synchronously with the shaft. During this process, the integrated structure of the sleeve provides a stable support foundation, preventing coaxiality deviations caused by structural splicing during installation.

[0038] For a one-piece molded hammerhead: after the sleeve is fixed, no additional assembly is required; the hammerhead and crusher can be directly assembled. Thanks to the high fusion strength of the connection surface between the hammer handle and the hammer body formed by casting, it can be directly put into operation without worrying about loosening. For a detachable hammerhead: first, the T-shaped locking block 11 of the hammer body 2 must be aligned with the T-shaped locking groove 12 of the hammer handle 1 and inserted vertically. The anti-dislodgement characteristic of the T-shaped structure can quickly achieve lateral positioning of the hammer body and hammer handle without repeated adjustments. Then, the bolt of the bolt assembly 16 is inserted through the relief groove 14 at the front end of the hammer handle, passing through the through holes of the hammer handle and hammer body in sequence. Finally, the nut is fitted and locked at the abutment boss 15 at the rear end of the hammer handle. The relief groove can accommodate the bolt head, preventing the bolt from protruding and wearing; the abutment boss provides stable support for the nut, ensuring uniform preload and preventing bolt loosening during subsequent operation. At the same time, the reinforcing blocks 13 at the front and rear of the T-shaped locking block and between the locking grooves can directly strengthen the connection area after assembly, providing structural protection for subsequent impact operations.

[0039] After the crusher starts, the shaft drives the hammer to rotate at a set speed. The hammer handle, through the integrated structure of "sleeve 3 → connecting part 4 → first triangular part 5", evenly transmits the rotational power to the second triangular part 6 of the hammer body 2, ensuring that the hammer rotates synchronously as a whole and avoiding local overload caused by uneven power transmission in traditional spliced ​​structures. Material introduction and precise impact: After the material to be crushed enters the crushing chamber through the crusher's feed inlet, it is guided by the fan-shaped structure of the hammer and the arc-shaped part 7 of the hammer body. The material gathers along the arc-shaped trajectory towards the impact end of the hammer body, reducing ineffective impact caused by material slippage. At this time, the high-speed rotating impact end of the hammer body, as the core crushing area, directly impacts, shears, and compresses the material at high frequency. The thickened design of the reinforcing part significantly increases the effective wear volume, which can withstand the severe impact of the material and avoid short-term wear failure of the traditional hammer impact end. At the same time, the arc transition structure between the reinforcing part and the second triangular part and arc-shaped part can disperse the local stress concentration at the moment of impact and prevent crack initiation. Stress dispersion and structural resistance to material impact: The stress generated by the impact of the material is evenly transmitted to the first triangular part of the hammer handle through the long side of the second triangular part of the hammer body, and then transmitted to the sleeve through the connecting part, forming a gradient stress dispersion path of "impact end → triangular part → connecting part → sleeve", avoiding fatigue damage caused by uneven stress in the connecting area. At the same time, the spines 9 and arc-shaped ridges 10 on the front and rear surfaces of the hammer body play a role: the arrayed spines can enhance the surface rigidity of the hammer body and resist the indentation deformation caused by material impact. The stepped arrangement of the spines from the front end to the rear end does not hinder the flow of material along the surface of the hammer body, and can enhance the support force through structural reinforcement at the high-stress impact end. The arc-shaped ridges pass through all the spines to form a mesh structure, further transforming local reinforcement into overall resistance to deformation. At the same time, the arc design of the ridges fits the material movement trajectory, ensuring a smooth crushing process.

[0040] During long-term operation, the high toughness of the hammer handle can withstand the centrifugal inertial force and material impact under high-speed rotation, preventing hammer handle breakage. The high hardness and wear resistance of the hammer body can resist material wear. Combined with the surface reinforcement of the spine and ribs, the effective service life of the hammer body is significantly extended compared to traditional single-material hammers. At the same time, the adaptability of the fan-shaped structure and the arc-shaped part can maintain high crushing efficiency for a long time and reduce unit crushing energy consumption. Maintenance and component replacement after wear: When the crushing efficiency decreases due to long-term wear of the hammer body's striking end, the nut of the bolt assembly can be loosened after stopping the machine, the bolt can be removed from the relief groove, and the worn hammer body can be removed vertically. When replacing the new hammer body, the maintenance can be completed by repeating the steps of "aligning the T-shaped block with the groove → inserting the bolt → tightening the nut". The entire process does not require replacing the entire hammer head, which greatly reduces spare parts costs and downtime. If it is a one-piece molded hammer head, due to its long service life, when replacement is needed, the connection between the sleeve and the shaft can be completely removed, and a new hammer head can be replaced.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite hammerhead for a hammer crusher, comprising a hammer handle (1) and a hammer body (2) disposed below the hammer handle (1), the two forming a fan-shaped hammerhead structure, wherein the front end of the hammer body (2) is the striking end, characterized in that: The hammer handle (1) includes a sleeve (3), a connecting part (4) and a first triangular part (5), which are integrally formed; the hammer body (2) includes a second triangular part (6), an arc-shaped part (7) and a reinforcing part (8), which are integrally formed. The reinforcing part (8) is located at the striking end of the hammer body (2), and the connection positions of the reinforcing part (8) with the second triangular part (6) and the arc-shaped part (7) are respectively connected by a rounded transition; the long sides of the second triangular part (6) and the first triangular part (5) are arranged opposite to each other.

2. The composite hammerhead for a hammer crusher according to claim 1, characterized in that: The hammer handle (1) and the hammer body (2) are integrally formed and are prepared by a two-stage regional casting process. The hammer handle (1) is a cast iron hammer handle and the hammer body (2) is a high chromium alloy hammer body. Multiple spines (9) are respectively provided on the front and rear sides of the hammer body (2). The spines (9) and the hammer body (2) are integrally formed.

3. The composite hammerhead for a hammer crusher according to claim 2, characterized in that: The spine (9) is distributed along the surface of the hammer (2) in an array, and is arranged in a stepped manner from the front end to the rear end of the hammer (2).

4. The composite hammerhead for a hammer crusher according to claim 3, characterized in that: The hammer body (2) has ridges (10) on its front and rear sides respectively. The ridges (10) are arranged in an arc shape and pass through all the spines (9) on their respective surfaces. The ridges (10) are integrally formed with the hammer body (2).

5. The composite hammerhead for a hammer crusher according to claim 1, characterized in that: The hammer body (2) is provided with a plurality of T-shaped locking blocks (11), and the hammer handle (1) is provided with T-shaped slots (12) corresponding to the T-shaped locking blocks (11). The hammer body (2) is inserted into the T-shaped slots (12) through the T-shaped locking blocks (11) and is fixedly connected by bolt assembly (16).

6. The composite hammerhead for a hammer crusher according to claim 5, characterized in that: Reinforcing blocks (13) are provided on the front and rear sides of the T-shaped card block (11) and on the front and rear sides of the hammer handle (1) between adjacent T-shaped card slots (12).

7. The composite hammerhead for a hammer crusher according to claim 6, characterized in that: The hammer body (2) and hammer handle (1) are provided with corresponding through holes. The through holes penetrate the middle of the T-shaped card block (11) and the T-shaped card groove (12). The bolt assembly (16) is inserted into the through hole.

8. The composite hammerhead for a hammer crusher according to claim 7, characterized in that: A relief groove (14) is provided at the through hole at the front end of the hammer handle (1), and an abutment boss (15) is provided at the through hole at the rear end of the hammer handle (1). The bolt of the bolt assembly (16) is inserted into the through hole from the front end of the hammer handle (1) and locked and fixed at the abutment boss (15) by a nut.

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