Compact multi-stage adjustable reversible impact hammer crusher

Abstract

The invention discloses a compact multi-stage adjustable reversible impact hammer crusher, and belongs to the technical field of crushing of circulating fluidized bed boilers. The reversible impact hammer crusher solves the problems that an existing reversible impact hammer crusher is too long in overall length and cannot be arranged in a crushing building of a newly-built or rebuilt and expanded project, and the granularity fluctuation of a crushed product of the crusher is large. A crushing plate assembly and a rotor assembly are installed in a shell assembly, the rotor assembly is arranged on the inner side of the crushing plate assembly, a first-stage crushing cavity and a second-stage crushing cavity are formed between the rotor assembly and the crushing plate assembly, the rotor assembly is installed in the shell assembly, and a motor is connected with the rotor assembly through a transmission mechanism. A first-stage adjusting mechanism, a second-stage adjusting mechanism and a third-stage adjusting mechanism are arranged in the shell assembly, and the first-stage adjusting mechanism, the second-stage adjusting mechanism and the third-stage adjusting mechanism are connected with the crushing plate assembly. According to the compact multi-stage adjustable reversible impact hammer crusher, through the synergistic effect of three stages of adjusting mechanisms, the adjusting range is wide, and the precision is high.

Description

Technical Field

[0001] This invention belongs to the field of circulating fluidized bed boiler crushing technology, specifically relating to a compact, multi-stage adjustable, reversible impact hammer crusher. Background Technology

[0002] With the development of production technology and industries such as power generation, heating, and chemicals, circulating fluidized bed (CFB) boilers, which employ fluidized bed combustion, represent the most industrialized clean coal combustion technology. CFB boilers offer advantages such as wide fuel adaptability, high fuel efficiency, low pollutant emissions, high combustion intensity, and good load regulation, making them widely used in new construction and expansion projects. Because the fuel in a CFB boiler is fluidized within the furnace, the particle size distribution of the material entering the furnace is crucial to the boiler's combustion efficiency and pollutant emissions. Reversible impact hammer crushers have the best matching particle size distribution with CFB boilers and are essential equipment in CFB boiler crushing systems.

[0003] As production continues to expand, the processing capacity of reversible impact hammer crushers is constantly increasing. Meanwhile, in renovation and expansion projects, existing crushing systems that do not utilize reversible impact hammer crushers, such as systems with two sets of toothed roller crushers, cannot meet the needs of circulating fluidized bed boilers. When constructing or renovating high-output reversible impact hammer crushers, conventional reversible impact hammer crushers typically employ a transmission method of one electric motor + hydraulic coupling + main unit, resulting in a total machine length exceeding 7 meters. Given that conventional civil engineering columns in industrial buildings are typically 6 meters high, conventional high-output reversible impact hammer crushers cannot be installed within the crushing towers of new or expanded projects.

[0004] In addition, most existing equipment uses a single-stage adjustment structure to control the gap of the crushing chamber, which can only make coarse adjustments to a single crushing area. It cannot achieve multi-stage and precise gap adjustment according to material characteristics and crushing requirements, resulting in large fluctuations in the particle size of the crushed products, making it difficult to meet the requirements of high-precision crushing scenarios.

[0005] Therefore, this application proposes a compact, multi-stage adjustable reversible impact hammer crusher to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the problems of existing reversible impact hammer crushers being too long to be installed in crushing towers of new or expanded projects, and the significant fluctuations in particle size of the crushed products. A brief overview of the invention is provided below to offer a basic understanding of certain aspects of it. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0007] The technical solution of this invention:

[0008] A compact, multi-stage adjustable reversible impact hammer crusher includes a main unit, a motor, and a transmission mechanism. The main unit includes a housing assembly, a crushing plate assembly, a rotor assembly, a primary adjustment mechanism, a secondary adjustment mechanism, and a tertiary adjustment mechanism. The crushing plate assembly and the rotor assembly are installed inside the housing assembly, with the rotor assembly arranged inside the crushing plate assembly. A primary crushing chamber and a secondary crushing chamber are formed between the rotor assembly and the crushing plate assembly. The rotor assembly is rotatably mounted on the housing assembly. The motor is connected to the rotor assembly through the transmission mechanism. The primary adjustment mechanism, the secondary adjustment mechanism, and the tertiary adjustment mechanism are installed sequentially from top to bottom inside the housing assembly, and the primary, secondary, and tertiary adjustment mechanisms are respectively connected to the crushing plate assembly.

[0009] Furthermore, the housing assembly includes side bodies, a lower base, a feeding section, and a middle side plate. Two side bodies are mounted on the lower base, and each side body is connected to a limiting seat on the lower base via a hinge. The feeding section and the middle side plate are connected between the two symmetrically arranged side bodies. The bottom end of the middle side plate is connected to the lower base, and the top end of the middle side plate is connected to the feeding section. Each side body is provided with multiple inspection doors, and the bottom of the lower base is machined with a discharge port.

[0010] Furthermore, the crushing plate assembly includes an upper crushing plate and a lower crushing plate. The two upper crushing plates are respectively installed in the side body through a first connecting shaft. A lower crushing plate is arranged below each upper crushing plate. The lower crushing plate is installed in the lower base through a second connecting shaft. The gap between the two upper crushing plates and the rotor assembly forms a primary crushing chamber, and the gap between the two lower crushing plates and the rotor assembly forms a secondary crushing chamber.

[0011] Furthermore, the upper crushing plate is machined with a first connecting hole, and the first-stage adjustment mechanism is connected to the upper crushing plate through the first connecting hole. The lower crushing plate is machined with a second connecting hole, and the third-stage adjustment mechanism is connected to the lower crushing plate through the second connecting hole. The second-stage adjustment mechanism is connected to the second connecting shaft of the lower crushing plate.

[0012] Furthermore, the primary adjustment mechanism includes a connecting rod, a hinge seat, a fixed adjustment seat, an adjustment screw, and an anti-loosening cover. Both ends of the connecting rod are connected to the upper-level crushing plate through first connecting holes. Two hinge seats are symmetrically installed on the connecting rod. Each hinge seat is connected to the adjustment screw through a second connecting pin. A fixed adjustment seat is connected between the adjustment screw and the hinge seat. An anti-loosening cover is fitted on the outer side of the adjustment screw. An extension plate is connected to the side wall of the hinge seat. A first adjustment scale is connected to the extension plate. The rear half of the first adjustment scale passes through the lower base and is arranged on the outer side of the lower base. A scale seal is installed at the tail end of the first adjustment scale.

[0013] Furthermore, the secondary adjustment mechanism includes an adjustment slider shaft, an adjustment seat, an adjustment sealing plate, and adjustment bolts. The adjustment slider shaft is mounted on the adjustment seat, which is fixedly mounted on the lower base. The front end of the adjustment slider shaft is connected to the second connecting shaft of the lower crushing plate. Adjustment bolts are connected to the left and right sides of the adjustment seat, and anti-loosening nuts are fitted on the adjustment bolts. The end of each adjustment bolt contacts the side wall of the adjustment slider shaft. An adjustment sealing plate is provided between the adjustment slider shaft and the lower base. The adjustment sealing plate is fitted on the adjustment slider shaft. A sealing end cap is installed on the adjustment seat, and a sealing gasket is connected between the sealing end cap and the adjustment seat.

[0014] Furthermore, the three-stage adjustment mechanism includes a worm gear drive shaft, a worm, a synchronization mechanism seat, a worm wheel, a lead screw, and a protective cover. Both ends of the worm gear drive shaft are connected to the worm via worm gear connecting sleeves. The worm is connected to the synchronization mechanism seat. One end of the synchronization mechanism seat is fitted with a worm end cap, and the other end with a worm through-cap. A worm wheel is installed inside the synchronization mechanism seat, and the worm wheel is mounted inside the seat via a second bearing. The worm wheel is connected to the worm. One end of the worm wheel is connected to a connecting shaft via a lead screw. The connecting shaft is connected to the lower-level crushing plate via a second connecting hole. The other end of the worm wheel is connected to a worm wheel through-cap, which is connected to the worm wheel via a locking nut. The protective cover is fitted onto the worm wheel. A second adjustment scale is connected to the lead screw, and the rear half of the second adjustment scale passes through the lower base and is positioned on the outside of the lower base.

[0015] Furthermore, the transmission mechanism includes a large pulley, a small pulley, and a transmission belt. The large pulley is connected to the rotor assembly, the small pulley is connected to the actuator end of the motor, and the large pulley and the small pulley are connected by the transmission belt.

[0016] Furthermore, the rotor assembly includes a main shaft, discs, combined hammers, and a hammer shaft. The two ends of the main shaft are rotatably mounted on bearing seats via first bearings. The bearing seats are fixedly mounted on the middle side plate. One end of the main shaft is connected to a large pulley. Multiple discs are mounted on the main shaft. Multiple combined hammers are arranged circumferentially between adjacent discs. The discs and combined hammers are connected by the hammer shaft.

[0017] Furthermore, the combined hammer head includes a cast hammer head and a forged hammer arm. The cast hammer head and the forged hammer arm are connected by a first connecting pin. A retaining ring is provided between the first connecting pin and the forged hammer arm. A stop shoulder is machined on the forged hammer arm.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention relates to a compact, multi-stage adjustable reversible impact hammer crusher, which adopts a transmission method with two motors, two pairs of large and small pulleys, and a main unit. The advantage is that the motors are side-mounted, which effectively reduces the length space and ensures that the reversible impact hammer crusher can be arranged within the column range of conventional civil engineering. The purpose of using two motors is to reduce the torque at the main unit shaft end by half compared to the torque of a single motor, which effectively increases the reliability of the crusher main shaft.

[0020] 2. The compact multi-stage adjustable reversible impact hammer crusher of the present invention can precisely adjust the primary crushing chamber and the secondary crushing chamber respectively through the coordinated action of the primary, secondary and tertiary adjustment mechanisms. It has a wide adjustment range and high precision, and can be flexibly adjusted according to different material characteristics and crushing requirements to ensure uniform particle size of crushed products and meet diverse operation requirements.

[0021] 3. The side body of the compact multi-stage adjustable reversible impact hammer crusher of the present invention is hinged to the lower base by a hinge shaft and can be flipped open. Combined with multiple inspection doors on the side body, it is convenient for operators to inspect and maintain the internal components. The combined hammer head adopts a detachable connection structure. When the hammer head is worn, only the cast hammer head needs to be replaced, without the need for overall replacement, which greatly reduces the cost of spare parts and maintenance workload.

[0022] 4. The compact multi-stage adjustable reversible impact hammer crusher of the present invention has multiple sealing structures and anti-loosening measures for each stage of the adjustment mechanism, which effectively prevents dust from entering the interior of the mechanism and causing wear and jamming, avoids the adjustment mechanism from shifting during vibration operation, and improves the operating stability and service life of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a compact, multi-stage adjustable, reversible impact hammer crusher.

[0024] Figure 2 This is a schematic diagram of the transmission mechanism;

[0025] Figure 3 This is a schematic diagram of the internal structure of the housing assembly and the distribution of the crushing chamber;

[0026] Figure 4 This is a schematic diagram of the housing assembly;

[0027] Figure 5 This is a schematic diagram of the installation structure of the crushing plate assembly;

[0028] Figure 6 This is the front view of the breaker assembly;

[0029] Figure 7 This is a schematic diagram of the rotor assembly;

[0030] Figure 8 This is an exploded view of the rotor assembly;

[0031] Figure 9 This is a schematic diagram of the exploded structure of the combined hammerhead;

[0032] Figure 10 This is a detailed structural diagram of a cast hammerhead;

[0033] Figure 11 This is a detailed structural schematic diagram of the forging hammer arm;

[0034] Figure 12 This is a schematic diagram of the combined hammer head rotating counterclockwise;

[0035] Figure 13 This is a schematic diagram of the combined hammer head rotating clockwise;

[0036] Figure 14 This is a schematic diagram of the structure of the primary regulating mechanism;

[0037] Figure 15 This is an exploded view of the primary regulating mechanism;

[0038] Figure 16 This is a schematic diagram of the two-stage regulating mechanism;

[0039] Figure 17 This is an exploded view of the secondary regulating mechanism;

[0040] Figure 18 This is a schematic diagram of the three-stage regulating mechanism;

[0041] Figure 19 This is an exploded view of the three-stage regulating mechanism.

[0042] In the diagram: 1-Housing assembly, 2-Motor, 3-Transmission mechanism, 4-Crushing plate assembly, 5-Rotor assembly, 6-First-stage adjustment mechanism, 7-Second-stage adjustment mechanism, 8-Third-stage adjustment mechanism, 9-First-stage crushing chamber, 10-Second-stage crushing chamber, 11-Side body, 12-Lower base, 13-Feed section, 14-Inspection door, 15-Limit seat, 16-Intermediate side plate, 31-Large pulley, 32-Small pulley, 33-Transmission belt, 41-Upper crushing plate, 42-Lower crushing plate, 43-First connecting shaft, 44-Second connecting shaft, 45-First connecting hole, 46-Second connecting hole, 51-Main shaft, 52-Disc, 53-Combined hammerhead, 54-Hammer shaft, 55-First bearing, 56-Bearing seat, 531-Cast hammerhead, 532-Forged hammer arm, 533-First connecting pin, 534-Retaining ring, 535- Stop shoulder, 5311-Reinforcing block, 5312-Weight-reducing block, 5313-Crack-avoiding groove, 5314-Protective groove, 61-Connecting rod, 62-Hinge seat, 63-Fixed adjusting seat, 64-Adjusting screw, 65-Anti-loosening cover, 66-Second connecting pin, 67-First adjusting scale, 68-Scale seal, 69-Extension plate, 71-Adjusting slider shaft, 72-Adjusting seat, 73-Adjusting sealing plate 74-Adjusting bolt, 75-Anti-loosening nut, 76-Sealing gasket, 77-Sealing end cover, 81-Worm drive shaft, 82-Worm, 83-Synchronizing mechanism seat, 84-Second bearing, 85-Worm wheel, 86-Lead screw, 87-Connecting shaft, 88-Worm wheel cover, 89-Worm end cover, 90-Guard cover, 91-Locking nut, 92-Worm connecting sleeve, 93-Worm cover, 94-Second adjusting scale. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0044] The connections mentioned in this invention are divided into fixed connections and detachable connections. Fixed connections (i.e., non-detachable connections) include, but are not limited to, conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include, but are not limited to, conventional disassembly methods such as threaded connections, snap-fit ​​connections, pin connections, and hinged connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can always be found to achieve the function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for fixed connections, and a hinged connection can be chosen for detachable connections.

[0045] Example 1, combined with Figures 1-9This embodiment describes a compact, multi-stage adjustable reversible impact hammer crusher, comprising a main unit, a motor 2, and a transmission mechanism 3. The main unit includes a housing assembly 1, a crushing plate assembly 4, a rotor assembly 5, a primary adjustment mechanism 6, a secondary adjustment mechanism 7, and a tertiary adjustment mechanism 8. The crushing plate assembly 4 and the rotor assembly 5 are installed inside the housing assembly 1, with the rotor assembly 5 arranged inside the crushing plate assembly 4. A primary crushing chamber 9 and a secondary crushing chamber 10 are formed between the rotor assembly 5 and the crushing plate assembly 4. The rotor assembly 5 is rotatably mounted on the housing assembly 1. The motor 2 is connected to the rotor assembly 5 through the transmission mechanism 3. The primary adjustment mechanism 6, the secondary adjustment mechanism 7, and the tertiary adjustment mechanism 8 are installed sequentially from top to bottom inside the housing assembly 1, and are respectively connected to the crushing plate assembly 4.

[0046] The housing assembly 1 serves as the mounting base for the equipment. Inside, the crushing plate assembly 4 and the rotor assembly 5 are integrated and installed. The rotor assembly 5 is arranged inside the crushing plate assembly 4. The crushing plate assembly 4 and the rotor assembly 5 form a primary crushing chamber 9 and a secondary crushing chamber 10, realizing multi-stage crushing of materials. The motor 2 establishes a power connection with the rotor assembly 5 through the transmission mechanism 3, providing power for the bidirectional rotation of the rotor assembly 5. The primary adjustment mechanism 6, the secondary adjustment mechanism 7, and the tertiary adjustment mechanism 8 are installed on the housing assembly 1 from top to bottom. They are connected to the crushing plate assembly 4 respectively and are used to precisely adjust the gap between the primary crushing chamber 9 and the secondary crushing chamber 10.

[0047] The two side bodies 11 are hinged to the limiting seat 15 on the lower base 12 via hinge pins to ensure the flexible flipping of the side bodies 11. An intermediate side plate 16 and a feeding part 13 are installed between the two side bodies 11. The intermediate side plate 16 is fixed to the lower base 12 with multiple bolts and then welded. The two sides of the intermediate side plate 16 are respectively bolted to the side bodies 11 on both sides. The top of the intermediate side plate 16 is bolted to the feeding part 13. Two inspection doors 14 are installed on each side body 11. A sealing strip is provided between each inspection door 14 and the side body 11 to ensure the sealing performance between the inspection door 14 and the side body 11.

[0048] The crushing plate assembly 4 includes an upper crushing plate 41 and a lower crushing plate 42. The two upper crushing plates 41 are rotatably mounted in the inner mounting groove of the side body 11 via a first connecting shaft 43. The two lower crushing plates 42 are rotatably mounted in the inner mounting groove of the lower base 12 via a second connecting shaft 44. The lower crushing plates 42 are located below the upper crushing plates 41. The upper crushing plates 41 and the lower crushing plates 42 form a primary crushing chamber 9 and a secondary crushing chamber 10 between themselves and the rotor assembly 5 installed in the housing assembly 1.

[0049] During rotor assembly, the first bearing 55 is installed in the bearing housing 56, and the bearing housing 56 is bolted to the middle side plate 16. The two ends of the main shaft 51 are rotatably mounted on the bearing housing 56 through the first bearing 55. Multiple discs 52 are spaced on the main shaft 51, and multiple combined hammers 53 are connected between adjacent discs 52 through hammer shafts 54. The multiple combined hammers 53 are arranged in a circumferential array between adjacent discs 52.

[0050] The large pulley 31 is fixedly connected to the main shaft 51 of the rotor assembly 5 via a flat key, and the small pulley 32 is fixedly connected to the output end of the motor 2 via a flat key. A transmission belt 33 is fitted between the large pulley 31 and the small pulley 32.

[0051] During crushing operations, the motor 2 is started, and the motor 2 drives the rotor assembly 5 to rotate at high speed through the transmission mechanism 3. The material to be crushed is fed into the crushing chamber of the housing assembly 1 through the feed section 13. The material first enters the primary crushing chamber 9, where it is initially crushed by the high-speed impact of the combined hammer 53 and the rebound action of the upper crushing plate 41. The material after initial crushing falls into the secondary crushing chamber 10, where it is further crushed by the secondary impact of the combined hammer 53 and the rebound action of the lower crushing plate 42. The crushed material is discharged through the discharge port at the bottom of the lower base 12, completing the crushing operation.

[0052] When it is necessary to adjust the crushing direction, the rotation direction of the motor 2 is switched, which drives the rotor assembly 5 to rotate in the opposite direction. The combined hammer 53 impacts the material in the opposite direction, realizing reversible crushing. This not only avoids material blockage, but also makes the combined hammer 53 wear more evenly and extends the service life of the hammer.

[0053] When it is necessary to inspect or replace the hammerhead inside the equipment, the inspection door 14 on the side body 11 can be opened to directly observe the internal working condition. If a deep inspection is required, the fixing bolts between the side body 11 and the lower base 12 can be loosened, and the side body 11 can be flipped open around the hinge axis to facilitate the disassembly and replacement of the crushing plate assembly 4, the combined hammerhead 53, and other components. After the cast hammerhead 531 of the combined hammerhead 53 is worn, it is only necessary to remove the first connecting pin 533 and replace it with a new cast hammerhead 531, which is convenient to operate.

[0054] Example 2, combined with Figure 1 , Figures 14-19 This embodiment describes a compact, multi-stage adjustable reversible impact hammer crusher. The gaps between the upper crushing plate 41 and the lower crushing plate 42 and the rotor assembly 5 are adjusted by a first-stage adjustment mechanism 6, a second-stage adjustment mechanism 7 and a third-stage adjustment mechanism 8 installed on the housing assembly 1, respectively.

[0055] The connecting rod 61 of the first-stage adjustment mechanism 6 is slidably connected to the upper-stage crushing plate 41 through the first connecting hole 45 at both ends. Two hinge seats 62 are symmetrically installed on the connecting rod 61. Each hinge seat 62 is connected to the adjusting screw 64 through the second connecting pin 66. A fixed adjusting seat 63 is connected between the adjusting screw 64 and the hinge seat 62. An anti-loosening cover 65 is fitted on the outside of the adjusting screw 64 to prevent dust from entering and to prevent loosening. An extension plate 69 is connected to the side wall of the hinge seat 62. A first adjusting scale 67 is fixedly connected to the extension plate 69. The rear half of the first adjusting scale 67 passes through the lower base 12 and is arranged on the outside of the lower base 12. A scale seal 68 is installed at the tail end to facilitate the operator to read the adjustment amount intuitively and improve the adjustment accuracy.

[0056] To adjust the primary crushing chamber 9, rotate the adjusting screw 64 of the primary rotating mechanism 6. This drives the connecting rod 61 to move via the hinge seat 62, which in turn pulls the upper crushing plate 41 to swing around the first connecting shaft 43. This adjusts the gap of the primary crushing chamber 9 to the preset value. The gap of the primary crushing chamber 9 is known by the first adjusting scale 67 located on the outside of the housing assembly 1. After adjustment, the anti-loosening cover 65 is placed on the outside of the adjusting screw 64 to loosen and prevent dust.

[0057] The adjusting slider shaft 71 of the secondary adjusting mechanism 7 is slidably mounted on the adjusting seat 72, which is fixed on the lower base 12. The front end of the adjusting slider shaft 71 is connected to the second connecting shaft 44 of the lower crushing plate 42. Adjusting bolts 74 are threadedly connected to the left and right sides of the adjusting seat 72, and anti-loosening nuts 75 are fitted on the adjusting bolts 74. The end of each adjusting bolt 74 is in close contact with the side wall of the adjusting slider shaft 71. By turning the adjusting bolts 74 on the left and right sides, the adjusting slider shaft 71 is pushed to move left and right, thereby realizing the left and right movement of the lower crushing plate 42 and controlling the gap adjustment between the lower crushing plate 42 and the rotor assembly 5. An adjusting sealing plate 73 is provided between the adjusting slider shaft 71 and the lower base 12. The adjusting sealing plate 73 moves with the movement of the adjusting slider shaft 71 and plays a dustproof sealing role. A sealing end cover 77 is installed on the adjusting seat 72, and a sealing gasket 76 is connected between the sealing end cover 77 and the adjusting seat 72 to form a multi-seal structure to prevent dust from entering.

[0058] When the secondary crushing chamber 10 is adjusted by the secondary adjustment mechanism 7, the adjusting bolt 74 of the secondary adjustment mechanism 7 is turned. The adjusting slider shaft 71 is moved left and right by the adjusting bolt 74 connected by threads on the left and right sides, thereby driving the second rotating shaft 44 to make a slight adjustment, so as to realize the left and right fine adjustment of the lower crushing plate 42 until the gap of the secondary crushing chamber 10 reaches the preset value. After the adjustment is completed, the anti-loosening nut 75 is tightened to prevent the gap from shifting due to vibration.

[0059] The worm gear drive shaft 81 of the three-stage adjustment mechanism 8 is connected to the worm gear 82 at both ends via worm gear connecting sleeves 92. The worm gear 82 is rotatably connected to the synchronization mechanism seat 83. One end of the synchronization mechanism seat 83 is equipped with a worm end cap 89, and the other end is equipped with a worm through cap 93. The worm end cap 89 serves a sealing function, and the worm through cap 93 serves a limiting function. A worm wheel 85 is rotatably installed inside the synchronization mechanism seat 83 via a second bearing 84. The worm wheel 85 meshes with the worm gear 82, forming a worm gear transmission mechanism with a self-locking function, which improves the adjustment stability. One end of the worm gear 85 is fixedly connected to the connecting shaft 87 via the lead screw 86. The connecting shaft 87 is slidably connected to the lower crushing plate 42 via the second connecting hole 46. The other end of the worm gear 85 is connected to a worm gear cover 88. The worm gear cover 88 is connected to the worm gear 85 via a locking nut 91. A protective cover 90 is fitted on the outside of the worm gear 85 for protection. A second adjustment scale 94 is connected to the lead screw 86. The rear half of the second adjustment scale 94 passes through the lower base 12 and is arranged on the outside for easy and accurate reading of the adjustment amount.

[0060] The three-stage adjustment mechanism 8 is used for the final fine adjustment of the particle size of the secondary crushing chamber 10. Rotating the worm drive shaft 81 of the three-stage adjustment mechanism 8 drives the worm 82 to rotate. The worm 8 drives the worm wheel 85 to rotate, which in turn drives the lead screw 86 to extend and retract. Through the connecting shaft 87, the lower crushing plate 42 is pulled to swing around the second connecting shaft 44, adjusting the gap between the lower half of the adjusting crushing plate 42 and the rotor assembly 5. By observing the reading of the second adjustment scale 94, the gap of the lower half of the secondary crushing chamber 10 is adjusted to the preset value.

[0061] Example 3, combined with Figures 7-13 This embodiment describes a compact, multi-stage adjustable, reversible impact hammer crusher. The combined hammer head 53 includes a cast hammer head 531 and a forged hammer arm 532. The cast hammer head 531 and the forged hammer arm 532 are connected by a first connecting pin 533. A stop shoulder 535 is machined on the forged hammer arm 532.

[0062] The casting hammerhead 531 comprises a composite casting of a reinforcing block 5311 and a weight-removing block 5312. The reinforcing block 5311 is made of high-chromium alloy, while the weight-removing block 5312 is made of low-carbon alloy. The weight-removing block 5312 has a crack-avoiding groove 5313, which is used to connect with the forging hammer arm 532. The weight-removing block 5312 also has a protective groove 5314, which is used to place a retaining ring 534 between the weight-removing block 5312 and the first connecting pin 533. The retaining ring 534 ensures that the casting hammerhead 531 and the forging hammer arm 532 fit tightly together. The reinforcing block 5311, which is in contact with the material, is made of high-chromium alloy, while the weight-removing block 5312, which is connected to the forging hammer arm 532, is made of low-carbon alloy. The advantage of this structure is that it increases the wear resistance and toughness of the hammerhead, making full use of the strengths of each material.

[0063] The forged hammer arm 532 is made of low alloy steel forging process, which effectively improves the toughness of the hammer arm. The structure of the combined hammer head 53 allows for the replacement of only the cast hammer head 531 without replacing the forged hammer arm 532 when replacing spare parts. This facilitates replacement, reduces spare parts costs, and effectively reduces the operation and maintenance costs of the combined hammer head 53.

[0064] This embodiment is merely an exemplary illustration of the present invention and does not limit its scope of protection. Those skilled in the art can make partial changes to it, as long as they do not exceed the spirit and essence of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A compact, multi-stage, adjustable, reversible impactor crusher, characterized by: The main unit includes a main unit, a motor (2) and a transmission mechanism (3). The main unit includes a housing assembly (1), a crushing plate assembly (4), a rotor assembly (5), a primary adjustment mechanism (6), a secondary adjustment mechanism (7) and a tertiary adjustment mechanism (8). The crushing plate assembly (4) and the rotor assembly (5) are installed inside the housing assembly (1). The rotor assembly (5) is arranged inside the crushing plate assembly (4). The rotor assembly (5) and the crushing plate assembly (4) form a primary crushing chamber (9) and a secondary crushing chamber (10). The rotor assembly (5) is rotatably mounted on the housing assembly (1). The motor (2) is connected to the rotor assembly (5) through the transmission mechanism (3). The primary adjustment mechanism (6), the secondary adjustment mechanism (7) and the tertiary adjustment mechanism (8) are installed in the housing assembly (1) from top to bottom. The primary adjustment mechanism (6), the secondary adjustment mechanism (7) and the tertiary adjustment mechanism (8) are respectively connected to the crushing plate assembly (4).

2. A compact, multi-stage, adjustable, reversible impact- hammer crusher according to claim 1, characterized in that: The housing assembly (1) includes a side body (11), a lower base (12), a feeding part (13), and a middle side plate (16). Two side bodies (11) are mounted on the lower base (12). Each side body (11) is connected to a limiting seat (15) on the lower base (12) via a hinge. The two symmetrically arranged side bodies (11) are connected by the feeding part (13) and the middle side plate (16). The bottom end of the middle side plate (16) is connected to the lower base (12), and the top end of the middle side plate (16) is connected to the feeding part (13). Each side body (11) is provided with multiple inspection doors (14). The bottom of the lower base (12) is machined with a discharge port.

3. A compact multi-stage adjustable reversible impact- hammer crusher as claimed in claim 2, wherein: The crushing plate assembly (4) includes an upper crushing plate (41) and a lower crushing plate (42). The two upper crushing plates (41) are respectively installed in the side body (11) through the first connecting shaft (43). The lower crushing plate (42) is arranged below each upper crushing plate (41). The lower crushing plate (42) is installed in the lower base (12) through the second connecting shaft (44). The gap between the two upper crushing plates (41) and the rotor assembly (5) forms a primary crushing chamber (9). The gap between the two lower crushing plates (42) and the rotor assembly (5) forms a secondary crushing chamber (10).

4. A compact, multi-stage, adjustable, reversible impact- hammer crusher according to claim 3, characterized in that: The upper crushing plate (41) is machined with a first connecting hole (45), and the first-level adjustment mechanism (6) is connected to the upper crushing plate (41) through the first connecting hole (45). The lower crushing plate (42) is machined with a second connecting hole (46), and the third-level adjustment mechanism (8) is connected to the lower crushing plate (42) through the second connecting hole (46). The second-level adjustment mechanism (7) is connected to the second connecting shaft (44) of the lower crushing plate (42).

5. A compact, multi-stage, adjustable, reversible impact- hammer crusher according to claim 4, characterized in that: The primary adjustment mechanism (6) includes a connecting rod (61), a hinge seat (62), a fixed adjustment seat (63), an adjustment screw (64), and an anti-loosening cover (65). Both ends of the connecting rod (61) are connected to the upper-level crushing plate (41) through first connecting holes (45). Two hinge seats (62) are symmetrically installed on the connecting rod (61). Each hinge seat (62) is connected to the adjustment screw (64) through a second connecting pin (66). The adjustment screw (64)... A fixed adjusting seat (63) is connected between the adjusting screw (64) and the hinge seat (62). An anti-loosening cover (65) is fitted on the outside of the adjusting screw (64). An extension plate (69) is connected to the side wall of the hinge seat (62). A first adjusting scale (67) is connected to the extension plate (69). The rear half of the first adjusting scale (67) passes through the lower base (12) and is arranged on the outside of the lower base (12). A scale seal (68) is installed at the tail end of the first adjusting scale (67).

6. A compact, multi-stage, adjustable, reversible impact- hammer crusher according to claim 5, characterized in that: The secondary adjustment mechanism (7) includes an adjustment slider shaft (71), an adjustment seat (72), an adjustment sealing plate (73), and adjustment bolts (74). The adjustment slider shaft (71) is installed on the adjustment seat (72), which is fixedly installed on the lower base (12). The front end of the adjustment slider shaft (71) is connected to the second connecting shaft (44) of the lower crushing plate (42). Adjustment bolts (74) are connected to the left and right sides of the adjustment seat (72). Anti-loosening nuts (75) are fitted on the adjustment bolts (74). The end of each adjustment bolt (74) contacts the side wall of the adjustment slider shaft (71). An adjustment sealing plate (73) is provided between the adjustment slider shaft (71) and the lower base (12). The adjustment sealing plate (73) is fitted on the adjustment slider shaft (71). A sealing end cap (77) is installed on the adjustment seat (72), and a sealing gasket (76) is connected between the sealing end cap (77) and the adjustment seat (72).

7. A compact, multi-stage adjustable, reversible impact hammer crusher according to claim 6, characterized in that: The three-stage adjustment mechanism (8) includes a worm drive shaft (81), a worm (82), a synchronization mechanism seat (83), a worm wheel (85), a lead screw (86), and a protective cover (90). Both ends of the worm drive shaft (81) are connected to the worm (82) via worm connecting sleeves (92). The worm (82) is connected to the synchronization mechanism seat (83). One end of the synchronization mechanism seat (83) is fitted with a worm end cap (89), and the other end is fitted with a worm through cover (93). A worm wheel (85) is installed inside the synchronization mechanism seat (83). The worm wheel (85) is installed inside the synchronization mechanism seat (83) via a second bearing (84). The wheel (85) is connected to the worm (82). One end of the worm wheel (85) is connected to the connecting shaft (87) through the lead screw (86). The connecting shaft (87) is connected to the lower crushing plate (42) through the second connecting hole (46). The other end of the worm wheel (85) is connected to the worm wheel cover (88). The worm wheel cover (88) is connected to the worm wheel (85) through the locking nut (91). The protective cover (90) is fitted on the worm wheel (85). The lead screw (86) is connected to the second adjusting scale (94). The rear half of the second adjusting scale (94) passes through the lower base (12) and is arranged on the outside of the lower base (12).

8. A compact, multi-stage adjustable, reversible impact hammer crusher according to claim 1 or 7, characterized in that: The transmission mechanism (3) includes a large pulley (31), a small pulley (32) and a transmission belt (33). The large pulley (31) is connected to the rotor assembly (5), the small pulley (32) is connected to the actuator of the motor (2), and the large pulley (31) and the small pulley (32) are connected by the transmission belt (33).

9. A compact, multi-stage adjustable, reversible impact hammer crusher according to claim 8, characterized in that: The rotor assembly (5) includes a main shaft (51), discs (52), combined hammers (53) and hammer shaft (54). The two ends of the main shaft (51) are rotatably mounted on bearing seats (56) through first bearings (55). The bearing seats (56) are fixedly mounted on the middle side plate (16). One end of the main shaft (51) is connected to the large pulley (31). Multiple discs (52) are mounted on the main shaft (51). Multiple combined hammers (53) are arranged circumferentially between adjacent discs (52). The discs (52) and combined hammers (53) are connected through hammer shaft (54).

10. A compact, multi-stage adjustable, reversible impact hammer crusher according to claim 9, characterized in that: The combined hammer head (53) includes a cast hammer head (531) and a forged hammer arm (532). The cast hammer head (531) and the forged hammer arm (532) are connected by a first connecting pin (533). A retaining ring (534) is provided between the first connecting pin (533) and the forged hammer arm (532). A stop shoulder (535) is machined on the forged hammer arm (532).

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