Hammer mill

Abstract

The invention provides a hammer mill which comprises a rack, a power component and a crushing chamber, a power shaft of the power component penetrates into the crushing chamber, a feeding hole and a discharging hole located below the feeding hole are formed in the crushing chamber, a sieve plate covering the discharging hole is connected to the inner wall of the crushing chamber, a plurality of stacked mounting seats are connected to a positioning plate, and the mounting seats are connected with a plurality of screw holes. The mounting base comprises a supporting plate and a supporting cylinder, the supporting plate is fixed to one end of the supporting cylinder, two sliding grooves evenly distributed along the axis of the supporting cylinder are formed in the supporting cylinder, hammer heads are slidably connected into the sliding grooves, a fixing bolt and an adjusting shaft are arranged on the end cover, the fixing bolt penetrates through the mounting base and is in threaded connection with the positioning plate, and the fixing bolt abuts against the end cover. The adjusting shaft penetrates through the containing cavity and is rotationally connected to the supporting plate, the adjusting shaft rotates and enables the hammer head to move in the length direction of the sliding groove through the conduction assembly, and the purposes of prolonging the service life of the hammer head, reducing the maintenance frequency and improving the equipment operation efficiency are achieved.

Description

Technical Field

[0001] This invention relates to the field of crushing machinery, and in particular, to a hammer crusher. Background Technology

[0002] Currently, Chinese patent CN222000088U discloses a sterile hammer mill, in which the input shaft is hollow and has a first elongated hole. A crushing hammer is connected to the outer surface of the input shaft. A switching hollow cylinder is rotatably connected inside the input shaft and has a second elongated hole. A fixed hollow cylinder is rotatably connected inside the switching hollow cylinder and has a third elongated hole. The fixed hollow cylinder is fixedly set. The switching hollow cylinder can be rotated and locked by an adjustment mechanism. The fixed hollow cylinder is connected to a high-temperature fan. During crushing, the three elongated holes are not connected to each other, and the crushing hammer crushes the raw materials. During sterilization after production, the three elongated holes are connected by controlling the rotation of the switching hollow cylinder. High-temperature hot air directly hits the inner wall of the crushing chamber and the rotating crushing hammer, removing all residues with the airflow while sterilizing without dead corners.

[0003] This type of sterile hammer mill uses fixed hammers, which must be replaced as a whole when worn out. This results in frequent downtime for maintenance, high replacement costs, and reduced production efficiency in actual production. These problems are even more pronounced when processing high-hardness materials, as the hammers wear out more quickly. Therefore, there is an urgent need for an innovative design that can extend the service life of the hammers, reduce maintenance frequency, and improve equipment operating efficiency. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a hammer mill that can extend the service life of the hammers, reduce the frequency of maintenance, and improve the operating efficiency of the equipment.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a hammer mill, comprising a frame, a power unit, and a crushing chamber, wherein the power unit and the crushing chamber are both fixed on the frame, the power shaft of the power unit passes through the crushing chamber, the crushing chamber has a feed hole and a discharge hole located below the feed hole, a sieve plate covering the discharge hole is connected to the inner wall of the crushing chamber, a positioning plate is fixed on the power shaft, and a plurality of stacked mounting seats are connected to the positioning plate, each mounting seat comprising a support plate and a support cylinder, the support plate being fixed to one end of the support cylinder and... A cavity is formed between the support plate and the support cylinder. Two grooves are evenly arranged along the axis of the support cylinder. A hammer head is slidably connected in the groove. An end cap is fixed at the end of the support cylinder away from the power component. A fixing bolt and an adjusting shaft are provided on the end cap. The fixing bolt passes through the mounting base and is threadedly connected to the positioning plate. The fixing bolt abuts against the end cap. The adjusting shaft passes through the cavity and is rotatably connected to the support plate. The rotation of the adjusting shaft causes the hammer head to move along the length of the groove through the transmission component. A locking sleeve for abutting against the end cap is threaded on the adjusting shaft.

[0006] The above technical solution achieves the adjustment of the hammer position by rotating the adjusting shaft to drive the hammer head along the slide groove. This allows for the utilization of the unworn portion of the hammer head, significantly extending its service life, reducing replacement frequency and maintenance downtime, lowering maintenance costs, and improving production efficiency. Furthermore, the adjustable hammer head position allows the crusher to better adapt to the processing needs of different materials. The cooperation of the fixing bolt and locking sleeve ensures the stability and operational safety of the adjusted hammer head.

[0007] As a preferred embodiment of the present invention, the hammers on adjacent mounting bases are arranged in a cross shape.

[0008] To achieve the above technical solution, the staggered arrangement of hammers on adjacent mounting bases ensures that after the material is impacted by the first layer of hammers, it is more likely to be impacted again by the second layer, thereby improving crushing efficiency and fineness. Secondly, the cross-shaped arrangement helps improve the flowability of material within the crushing chamber, reducing the possibility of material accumulation and blockage, making the crushing process smoother. Furthermore, this staggered impact method helps disperse impact force, reducing overall equipment vibration and noise, and improving the stability of equipment operation. More importantly, the uniform distribution and staggered operation of the hammers allows for more even utilization of the space within the crushing chamber, avoiding excessive load in localized areas, which may reduce localized wear on the hammers and screen plates, further extending their service life.

[0009] In a preferred embodiment of the present invention, the conductive assembly includes an adjusting disk, an adjusting groove, and a protruding post. The adjusting disk is located in the cavity, the adjusting shaft passes through the adjusting disk and is fixedly connected to the adjusting disk, the adjusting groove is opened on the hammer head, and the protruding post is slidably connected to the adjusting disk through an elastic component. The protruding post is used to pass through the adjusting groove.

[0010] To achieve the above technical solution, the rotation adjustment shaft allows for more precise and controllable adjustment of the hammer position, enabling operators to fine-tune the gap between the hammer and the sieve plate and optimize the crushing effect. Secondly, the combination of adjusting the inclination angle of the inclined chute and the rotational movement of the adjustment disc achieves the conversion from rotary motion to linear motion, resulting in a compact and reliable structure.

[0011] As a preferred embodiment of the present invention, the elastic component includes an elastic recess, an elastic element, and an anti-detachment ring. The elastic recess is opened on the adjusting plate, and the protrusion is slidably connected in the elastic recess. The two ends of the elastic element abut against the inner wall of the elastic recess and the protrusion, respectively. The anti-detachment ring is fixed at the opening of the elastic recess and is used to abut against the protrusion.

[0012] To achieve the above technical solution, during installation, when the protrusion on the adjusting plate is aligned with the adjusting groove on the hammer head, the elastic element in the elastic assembly will immediately generate a thrust, precisely pushing the protrusion, which is slidably connected in the elastic recess, into the adjusting groove of the hammer head, thereby achieving a quick connection between the adjusting plate and the hammer head.

[0013] As a preferred embodiment of the present invention, the end of the hammer head that penetrates the cavity is provided with a guide slope, and the end of the protrusion away from the adjustment plate is hemispherical, and the guide slope is used to abut against the end of the protrusion.

[0014] To achieve the above technical solution, during installation, when the hammer head slides along the groove into the cavity and approaches the adjusting plate, the guide slope will first contact the hemispherical end of the protrusion. The cooperation between the guide slope and the hemisphere can play a good guiding role, allowing the protrusion to slide along the surface of the hammer head. The protrusion further exerts pressure on the elastic element, and the elastic element is further compressed. When the protrusion corresponds to the adjusting groove, the elastic force of the elastic element causes the protrusion to penetrate into the adjusting groove.

[0015] As a preferred embodiment of the present invention, the end cap is provided with a locking bolt, the locking bolt passes through the support plate and is threadedly connected to the positioning plate, the hammer head is provided with a connecting groove for the locking bolt to pass through, the length direction of the connecting groove is parallel to the length direction of the hammer head, and a pressure plate for abutting against the surface of the hammer head is fixed on the locking bolt.

[0016] To achieve the above technical solution, after moving the hammer head to the desired position via the adjusting shaft, the operator tightens the locking bolt on the end cap. The locking bolt passes through the support plate and is threadedly connected to the positioning plate. The pressure plate on the locking bolt moves with the locking bolt and presses tightly against the surface of the hammer head. Through friction, the hammer head is firmly fixed in the groove of the support cylinder, effectively resisting the huge centrifugal force generated during high-speed rotation and preventing the hammer head from loosening or shifting. The connecting groove on the hammer head, parallel to the length direction of the hammer head, cleverly allows the locking bolt to pass through, ensuring that the locking bolt does not obstruct the sliding of the hammer head when adjusting its position. Only after adjustment is completed, and by tightening the locking bolt, does the pressure plate perform its fixing function. This design structure is simple and effective, ensuring both the adjustability of the hammer head position and the stability of the hammer head in the working state.

[0017] As a preferred embodiment of the present invention, an auxiliary rod is slidably connected to the support plate, and an auxiliary plate is fixedly connected to the end of the auxiliary rod. The locking bolt rotates and, through the connecting assembly, causes the auxiliary plate to abut against the side wall of the hammer or to separate the auxiliary plate from the hammer.

[0018] To achieve the above technical solution, when the rotating locking bolt secures the hammerhead, the connecting assembly synchronously drives the auxiliary rod to slide, causing the auxiliary plate to tightly abut against the side wall of the hammerhead, forming additional lateral support. This, combined with the fixation provided by the pressure plate, achieves double fixation of the hammerhead. This design significantly enhances the stability of the hammerhead during high-speed operation, effectively preventing lateral swaying and improving the smoothness of equipment operation. Lateral support also helps to distribute the stress on the hammerhead within the chute, reducing unnecessary friction and wear, thereby extending the service life of the hammerhead and chute. More importantly, the rotation of the locking bolt simultaneously controls radial and lateral fixation, making operation simple and efficient. The hammerhead can be fully fixed or loosened without additional steps, providing a strong guarantee for the reliable operation of the hammer mill.

[0019] As a preferred embodiment of the present invention, the connecting assembly includes a toothed groove, a connecting shaft, a gear, and a rack. A plurality of the toothed grooves are formed on the outer wall of the locking bolt and are evenly distributed along the axis of the locking bolt. The connecting shaft is rotatably connected to the support plate. The gear is fixed on the connecting shaft and coaxially arranged. The rack is fixed on the auxiliary rod and meshes with the gear.

[0020] To achieve the above technical solution, when the locking bolt is operated, the toothed grooves on its outer wall drive the gear on the connecting shaft to rotate, which in turn causes the rack fixed to the auxiliary rod to slide linearly, ultimately achieving the clamping or separation of the auxiliary plate from the side wall of the hammer. This design brings significant advantages. First, the gear and rack mechanism can accurately convert rotational motion into linear motion, ensuring accurate and reliable positioning of the auxiliary plate. Second, the mechanism has high transmission efficiency, making it easy to control the movement of the auxiliary plate when operating the locking bolt. In addition, the gear and rack structure is relatively compact and durable, suitable for long-term stable operation in the complex environment inside the crusher. More importantly, this linkage method ensures that the rotation of the locking bolt and the movement of the auxiliary plate are synchronized, simplifying the operation process, improving overall convenience and reliability, and providing a solid mechanical foundation for the stable fixation of the hammer.

[0021] As a preferred embodiment of the present invention, high-hardness PU pads are fixedly connected to both the pressure plate and the auxiliary plate, and the high-hardness PU pads are pressed against the outer wall of the hammer head.

[0022] To achieve the above technical solution, firstly, the high-hardness PU material possesses excellent wear resistance and impact resistance, effectively protecting the hammerhead surface and reducing wear and damage that may be caused by direct metal-to-metal contact, thereby further extending the hammerhead's service life. Secondly, the PU pad provides good friction, enhancing the clamping force and lateral support of the pressure plate and auxiliary plate on the hammerhead, ensuring that the hammerhead will not loosen or shift during high-speed operation, thus improving operational stability and safety. Furthermore, the PU material also has certain shock absorption and noise reduction properties, absorbing some of the vibration and noise generated during the crushing process, improving the equipment's working environment. Finally, the PU material typically has a certain degree of corrosion resistance, enabling it to adapt to the complex environment inside the crushing chamber, further enhancing the reliability and durability of the entire locking mechanism.

[0023] As a preferred embodiment of the present invention, a cooling plate is fixedly connected to the outer wall of the grinding chamber, and a cooling zone is formed between the cooling plate and the grinding chamber. An inlet pipe and an outlet pipe communicating with the cooling zone are fixedly connected to the cooling plate.

[0024] To achieve the above technical solution, the coolant circulates within the cooling zone, carrying away heat from the grinding chamber walls and thus precisely controlling the temperature within the grinding chamber. This is crucial for processing heat-sensitive materials, preventing material deterioration, decomposition, or impact on product quality due to overheating. Simultaneously, a suitable temperature also helps improve grinding efficiency, prevents material adhesion, and extends the service life of key components such as hammers and sieves, reducing maintenance costs. Furthermore, for materials with potential safety hazards, the cooling system can effectively reduce the risk of overheating, enhancing the safety of equipment operation.

[0025] In summary, the present invention has the following beneficial effects: 1. The introduction of adjustable hammer position not only extends hammer life, reduces maintenance frequency and costs, but also optimizes crushing performance based on material characteristics. The cross-shaped arrangement of hammers on adjacent mounting seats further enhances crushing efficiency and material flowability, and helps reduce equipment vibration. A dual fixing mechanism combining locking bolts, pressure plates, and auxiliary plates ensures high stability and safety of the hammers under high-speed operation. Ingenious transmission and elastic components make hammer position adjustment more precise, convenient, and reliable. Finally, the addition of a cooling system effectively controls the temperature inside the crushing chamber, ensuring material quality, improving equipment operational safety, and extending component life. These technical features work synergistically to achieve a comprehensive improvement in the hammer mill's efficiency, durability, and ease of operation. If one hammer breaks, only two hammers on that mounting seat need to be replaced, reducing maintenance costs.

[0026] 2. Currently, there is also a solution that fixes each hammerhead with an independent screw, that is, the screw passes through the mounting base and is pressed against the side wall of the hammerhead. However, this method has three drawbacks. First, the screw is exposed outside the mounting base and is easily damaged by materials. Second, the screws near the positioning plate are blocked by the many hammerheads, making it difficult to operate the screws by reaching into the bottom of the crushing chamber. Third, tightening and loosening each screw is cumbersome and impractical.

[0027] In this patent application, the locking bolt is positioned on the side of the support cylinder and will not come into direct contact with the material, making the locking bolt less prone to damage. Furthermore, tightening and loosening the locking bolt on the end cap allows all the hammers to be positioned and released, making operation more convenient. Attached Figure Description

[0028] Figure 1 To illustrate the structure of the feed hopper; Figure 2 A schematic diagram illustrating the structure of the discharge port; Figure 3 To illustrate the structure of the sieve plate; Figure 4 To illustrate the structure of the fixing bolt; Figure 5 To illustrate the connection structure between two adjacent mounting bases; Figure 6 A schematic diagram illustrating the position of the adjustment shaft; Figure 7 for Figure 6 Enlarged view of point A; Figure 8 A diagram illustrating the position of the locking bolt; Figure 9 for Figure 8 Enlarged view of point B; Figure 10 A diagram illustrating the position of the magnet; Figure 11 To illustrate the structural diagram of the end cap; Figure 12 A schematic diagram illustrating the external structure of the present invention; Figure 13 This is a schematic diagram illustrating the external structure of the grinding chamber.

[0029] Reference numerals: 1. Frame; 2. Power unit; 3. Crushing chamber; 4. Feed port; 5. Discharge port; 6. Feed hopper; 7. Clamping block; 8. Screen plate; 9. Positioning plate; 10. Mounting base; 11. Support plate; 12. Support cylinder; 13. Slide groove; 14. Hammer; 15. End cover; 16. Fixing bolt; 17. Adjusting shaft; 18. Locking sleeve; 19. Transmission assembly; 20. Adjusting disc; 21. Adjusting chute; 22. Protruding column; 23. Mounting hole; 24. 25. Magnet; 26. Limiting groove; 27. Limiting strip; 28. Elastic component; 29. ​​Elastic recess; 30. Elastic element; 31. Anti-detachment ring; 32. Guide slope; 33. Locking bolt; 34. Connecting groove; 35. Pressure plate; 36. Auxiliary rod; 37. Auxiliary plate; 38. Connecting component; 39. Gear; 40. Connecting shaft; 41. Gear; 42. Rack; 43. High-hardness PU pad; 44. Cooling plate; 45. Liquid inlet pipe; 46. Liquid outlet pipe. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and mastered.

[0031] A hammer mill includes a frame 1, a power unit 2, and a grinding chamber 3. Both the power unit 2 and the grinding chamber 3 are fixed to the frame 1. The power shaft of the power unit 2 passes through the grinding chamber 3, and the power unit 2 contains a motor; the power shaft serves as the motor's drive shaft. A feed hole 4 and a discharge hole 5 located below the feed hole 4 are provided on the grinding chamber 3. A feed hopper 6 is fixed to the feed hole 4.

[0032] A clamping block 7 is fixed on the inner wall of the crushing chamber 3. The clamping block 7 has an L-shaped cross-section. The screen plate 8 is arc-shaped and slidably connected to the clamping block 7, so that the screen plate 8 covers the discharge hole 5.

[0033] A positioning plate 9 is fixed on the power shaft, and the positioning plate 9 is coaxially arranged with the power shaft. Multiple stacked mounting seats 10 are connected to the positioning plate 9. Each mounting seat 10 includes a support plate 11 and a support cylinder 12. The support plate 11 is fixed to one end of the support cylinder 12, and a cavity is formed between the support plate 11 and the support cylinder 12. The support cylinder 12 is annular, and the support plate 11 is disc-shaped.

[0034] Two grooves 13 are formed on each support cylinder 12. The two grooves 13 are evenly arranged along the axis of the support cylinder 12, and the length direction of the grooves 13 is set along the radial direction of the support cylinder 12. A hammer head 14 is slidably connected in each groove 13. An O-ring (not shown in the figure) is fixedly connected to the inner wall of the groove 13. The inner wall of the O-ring abuts against the outer wall of the hammer head 14 to achieve a seal.

[0035] The hammers 14 on two adjacent mounting bases 10 are arranged in a cross shape.

[0036] An end cap 15 is fixed to the end of the support cylinder 12 away from the power component 2. The end cap 15 is single and coaxially arranged with the support cylinder 12. Four fixing bolts 16 and an adjusting shaft 17 are provided on the end cap 15. The fixing bolts 16 are evenly distributed along the axis of the end cap 15. The fixing bolts 16 pass through all the mounting seats 10 and are threadedly connected to the positioning plate 9. The fixing bolts 16 abut against the end cap 15 to fix all the mounting seats 10 onto the positioning plate 9.

[0037] An adjusting shaft 17 is provided and coaxially arranged with the end cover 15. The end of the adjusting shaft 17 is threadedly connected to a locking sleeve 18 for abutting against the outer wall of the end cover 15. The adjusting shaft 17 passes through the cavity and is rotatably connected to a support plate 11 that is fitted onto the positioning plate 9. The adjusting shaft 17 passes through the remaining support plates 11. The locking sleeve 18 is a nut. Multiple locking sleeves 18 may be provided.

[0038] The adjusting shaft 17 rotates and, through the transmission assembly 19, causes the hammer head 14 to move along the length of the slide groove 13.

[0039] The transmission assembly 19 includes an adjustment plate 20, an adjustment groove 21, and a protrusion 22. The adjustment groove 21 is formed on the hammer head 14, and the protrusion 22 is slidably connected to the adjustment plate 20 through the elastic assembly 27. The protrusion 22 is used to penetrate into the adjustment groove 21 and to make the end of the protrusion 22 contact the inner wall of the support plate 11.

[0040] The adjusting disc 20 is located in the cavity. The adjusting shaft 17 passes through the adjusting disc 20 and is coaxially arranged. A mounting hole 23 is provided on the outer wall of the adjusting shaft 17. A magnet 24 is fixedly connected in the mounting hole 23. A limiting groove 25 is provided on the outer wall of the adjusting shaft 17. A limiting strip 26 is fixed on the inner wall of the adjusting disc 20. When the adjusting shaft 17 passes through the adjusting disc 20, the limiting strip 26 passes through the limiting groove 25. When the adjusting disc 20 is moved along the length direction of the adjusting shaft 17, the magnetic force of the magnet 24 positions the adjusting disc 20 on the adjusting shaft 17, and the magnet 24 attracts the limiting strip 26.

[0041] First, place the adjusting disc 20 onto the adjusting shaft 17. After limiting the adjusting disc 20, place the mounting base 10 onto the adjusting shaft 17. Then, place another adjusting disc 20 onto the adjusting shaft 17, and then place another mounting base 10 onto the adjusting shaft 17. Repeat this process until all the mounting bases 10 are installed on the adjusting shaft 17.

[0042] The elastic assembly 27 includes an elastic recess 28, an elastic element 29, and an anti-detachment ring 30. The elastic recess 28 is formed on the adjusting disc 20, and two elastic recesses 28 are evenly distributed along the axis of the adjusting disc 20. A protrusion 22 is slidably connected in the elastic recess 28. Both ends of the elastic element 29 abut against the inner wall of the elastic recess 28 and the protrusion 22, respectively. The anti-detachment ring 30 is fixed at the opening of the elastic recess 28 and abuts against the protrusion 22. The elastic element 29 is a spring.

[0043] A guide slope 31 is provided at one end of the hammer head 14 that enters the cavity, and the end of the protrusion 22 away from the adjustment plate 20 is hemispherical. The guide slope 31 is used to abut against the end of the protrusion 22.

[0044] After all the mounting bases 10 and adjusting plates 20 are installed, the hammer head 14 is inserted into the cavity along the slide groove 13. The guide ramp 31 on the hammer head 14 abuts against the end of the protrusion 22, causing the protrusion 22 to move along the guide ramp 31 and further compress the elastic element 29. When the protrusion 22 corresponds to the adjusting groove 21, the protrusion 22 is inserted into the adjusting groove 21 by the elastic force of the elastic element 29. Due to the magnetic force of the magnet 24, a distance is maintained between the adjusting plate 20 and the support plate 11, so that the hammer head 14 can be inserted between the adjusting plate 20 and the support plate 11.

[0045] When the adjusting shaft 17 rotates, the adjusting disc 20 rotates, and the protruding post 22 abuts against the inner wall of the adjusting groove 21, causing the hammer head 14 to slide along the slide groove 13.

[0046] A locking bolt 32 is rotatably mounted on the end cap 15. The locking bolt 32 passes through the support plate 11 and is threadedly fixed to the positioning plate 9. A connecting groove 33 for the locking bolt 32 is provided at one end of the hammer head 14 near the cavity. The length direction of the connecting groove 33 is parallel to the length direction of the hammer head 14. A pressure plate 34 is fixed on the locking bolt 32 for pressing against the surface of the hammer head 14.

[0047] An auxiliary rod 35 is slidably connected to the support plate 11, and an auxiliary plate 36 is fixedly connected to the end of the auxiliary rod 35. The locking bolt 32 rotates and, through the connecting assembly 37, causes the auxiliary plate 36 to abut against the side wall of the hammer head 14, or to separate the auxiliary plate 36 from the hammer head 14.

[0048] The connecting assembly 37 includes toothed grooves 38, a connecting shaft 39, a gear 40, and a rack 41. Multiple toothed grooves 38 are formed on the outer wall of the locking bolt 32 and are evenly distributed along the axis of the locking bolt 32. The connecting shaft 39 is rotatably connected to the support plate 11, and the axis of the connecting shaft 39 is parallel to the axis of the locking bolt 32. The gear 40 is fixed to the connecting shaft 39 and is coaxial with the connecting shaft 39. The rack 41 is fixed to the auxiliary rod 35 and meshes with the gear 40.

[0049] When the locking bolt 32 rotates, the pressure plate 34 moves closer to the hammer head 14, causing the gear 40 to rotate via the toothed groove 38. The gear 40 rotates along the axis of the connecting shaft 39, and the rack 41, driven by the gear 40, moves the auxiliary rod 35 closer to the hammer head 14, causing the auxiliary plate 36 to abut against the side wall of the hammer head 14. A spring washer (not shown in the figure) is fitted on the locking bolt 32, located on the side of the end cover 15 opposite to the mounting base 10. The locking bolt 32 is tightened onto the positioning plate 9, causing the spring washer to deform under the pressure of the locking bolt 32 and the end cover 15, thus preventing the locking bolt 32 from coming loose.

[0050] High-hardness PU pads 42 are fixedly connected to both the pressure plate 34 and the auxiliary plate 36, and the high-hardness PU pads 42 are pressed against the outer wall of the hammer head 14. The high-hardness PU pads 42 have a certain degree of elasticity to prevent the auxiliary plate 36 from failing to press against the hammer head 14 when the pressure plate 34 and the hammer head 14 are pressed together due to process errors.

[0051] A cooling plate 43 is fixedly connected to the outer wall of the grinding chamber 3, forming a cooling zone between the cooling plate 43 and the grinding chamber 3. An inlet pipe 44 and an outlet pipe 45, communicating with the cooling zone, are fixedly connected to the cooling plate 43. A water tank (not shown) and a water pump (not shown) are fixed inside the power unit 2, with the water pump installed in the inlet pipe 44. Coolant is injected into the water tank. The inlet pipe 44 and the outlet pipe 45 are connected to the water tank. When the water pump starts, coolant is injected into the cooling zone from the inlet pipe 44, and then the coolant flows back into the water tank from the outlet pipe 45.

[0052] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A hammer mill, comprising a frame (1), a power unit (2), and a crushing chamber (3), wherein the power unit (2) and the crushing chamber (3) are both fixed on the frame (1), the power shaft of the power unit (2) passes through the crushing chamber (3), the crushing chamber (3) is provided with a feed hole (4) and a discharge hole (5) located below the feed hole (4), and a sieve plate (8) covering the discharge hole (5) is connected to the inner wall of the crushing chamber (3), characterized in that: A positioning plate (9) is fixed on the power shaft. Multiple stacked mounting seats (10) are connected to the positioning plate (9). Each mounting seat (10) includes a support plate (11) and a support cylinder (12). The support plate (11) is fixed to one end of the support cylinder (12), forming a cavity between the support plate (11) and the support cylinder (12). Two sliding grooves (13) are evenly arranged along the axis of the support cylinder (12). A hammer head (14) is slidably connected within the sliding grooves (13). The support cylinder (12) is located away from the power component (2). An end cap (15) is fixed at one end. A fixing bolt (16) and an adjusting shaft (17) are provided on the end cap (15). The fixing bolt (16) passes through the mounting base (10) and is threadedly connected to the positioning plate (9). The fixing bolt (16) abuts against the end cap (15). The adjusting shaft (17) passes through the cavity and is rotatably connected to the support plate (11). The adjusting shaft (17) rotates and causes the hammer head (14) to move along the length direction of the slide groove (13) through the transmission assembly (19). A locking sleeve (18) for abutting against the end cap (15) is threaded on the adjusting shaft (17).

2. A hammer mill according to claim 1, characterized in that: The hammers (14) on adjacent mounting bases (10) are arranged in a cross shape.

3. A hammer mill according to claim 1, characterized in that: The conductive assembly (19) includes an adjusting plate (20), an adjusting groove (21), and a protruding post (22). The adjusting plate (20) is located in the cavity. The adjusting shaft (17) passes through the adjusting plate (20) and is fixedly connected to the adjusting plate (20). The adjusting groove (21) is opened on the hammer head (14). The protruding post (22) is slidably connected to the adjusting plate (20) through the elastic assembly (27). The protruding post (22) is used to penetrate into the adjusting groove (21).

4. A hammer mill according to claim 3, characterized in that: The elastic component (27) includes an elastic recess (28), an elastic element (29), and an anti-detachment ring (30). The elastic recess (28) is opened on the adjusting plate (20). The protrusion (22) is slidably connected in the elastic recess (28). The two ends of the elastic element (29) abut against the inner wall of the elastic recess (28) and the protrusion (22), respectively. The anti-detachment ring (30) is fixed at the opening of the elastic recess (28) and is used to abut against the protrusion (22).

5. A hammer mill according to claim 3, characterized in that: The hammer (14) has a guide slope (31) at one end that enters the cavity, and the end of the protrusion (22) away from the adjustment plate (20) is hemispherical. The guide slope (31) is used to abut against the end of the protrusion (22).

6. A hammer mill according to any one of claims 1-5, characterized in that: The end cap (15) is provided with a locking bolt (32), which passes through the support plate (11) and is threadedly connected to the positioning plate (9). The hammer head (14) is provided with a connecting groove (33) for the locking bolt (32) to pass through. The length direction of the connecting groove (33) is parallel to the length direction of the hammer head (14). The locking bolt (32) is fixed with a pressure plate (34) for pressing against the surface of the hammer head (14).

7. A hammer mill according to claim 6, characterized in that: An auxiliary rod (35) is slidably connected to the support plate (11), and an auxiliary plate (36) is fixedly connected to the end of the auxiliary rod (35). The locking bolt (32) rotates and, through the connecting assembly (37), causes the auxiliary plate (36) to abut against the side wall of the hammer head (14) or to separate the auxiliary plate (36) from the hammer head (14).

8. A hammer mill according to claim 7, characterized in that: The connecting assembly (37) includes a toothed groove (38), a connecting shaft (39), a gear (40), and a rack (41). A plurality of the toothed grooves (38) are formed on the outer wall of the locking bolt (32) and are evenly distributed along the axis of the locking bolt (32). The connecting shaft (39) is rotatably connected to the support plate (11). The gear (40) is fixed on the connecting shaft (39) and coaxially arranged. The rack (41) is fixed on the auxiliary rod (35) and meshes with the gear (40).

9. A hammer mill according to claim 8, characterized in that: High-hardness PU pads (42) are fixedly connected to both the pressure plate (34) and the auxiliary plate (36), and the high-hardness PU pads (42) abut against the outer wall of the hammer head (14).

10. A hammer mill according to claim 1, characterized in that: A cooling plate (43) is fixedly connected to the outer wall of the grinding chamber (3). A cooling zone is formed between the cooling plate (43) and the grinding chamber (3). An inlet pipe (44) and an outlet pipe (45) communicating with the cooling zone are fixedly connected to the cooling plate (43).

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