Hammer crusher

Abstract

The utility model discloses a hammer crusher, which belongs to the technical field of crushing equipment and comprises a shell provided with a feed hopper and a discharge port at the bottom and internally provided with a plurality of lining plates, and a rotating shaft arranged in the shell, provided with two ends rotatably connected with two axial ends of the shell respectively and driven by a driving mechanism, the rotating shaft is sleeved with a plurality of hammer discs at intervals, a plurality of hammer heads are arranged in the circumferential direction of each hammer disc at intervals, and the hammer heads of every two adjacent hammer discs are arranged in a staggered mode; the feeding hopper is arranged on the upper portion of the discharging port and located on one side of the machine shell in the upward rotation direction of the hammer head. According to the utility model, the crushing efficiency can be effectively improved, the service life of the hammer head is prolonged, meanwhile, the distribution uniformity of materials can be ensured, and a good crushing effect is realized.

Description

Technical Field

[0001] This utility model belongs to the field of crushing equipment technology, specifically relating to a hammer crusher. Background Technology

[0002] Hammer crushers are a common type of crushing equipment, widely used in coarse and medium crushing of various materials due to their simple structure, convenient operation, and large crushing ratio. Currently, hammer crushers have become standard equipment in stone crushing production lines, playing a crucial role, especially in the crushing of materials such as limestone, coal, gypsum, lime, and slag. Existing hammer crushers mainly consist of a casing, shaft, hammer disc, hammers, and drive unit. Their working principle involves the high-speed rotating shaft driving the hammers to impact, shear, and grind the material entering the crushing chamber of the casing, achieving the purpose of crushing. However, commercially available hammer crushers often suffer from insufficient hammering and grinding, and the casing is prone to damage during material impact, significantly limiting crushing efficiency and equipment lifespan.

[0003] To address the aforementioned issues, Chinese patent application CN118634912A discloses a horizontal grinding device for manufactured sand, comprising a cylindrical housing consisting of an annular sidewall, sealing plates located on both sides of the annular sidewall, and a machine cover; a main shaft, which drives multiple hammers to rotate and penetrates one side of the sealing plate within the housing; multiple arc-shaped liners on the inner wall of the annular sidewall, opposite to the hammers and whose distance from the hammers can be adjusted radially; a first feed hopper connected to a first feed inlet located at the center of one side of the machine cover; a second feed hopper connected to a second feed inlet located on the sealing plate on the left or right side of the main shaft; and a discharge port located at the bottom of the annular sidewall. The main shaft, located outside the cylindrical housing, has a pulley fixedly fitted at one end connected to a drive mechanism. The hammers are mounted on the circumference of a hammer holder connected to the main shaft. Multiple fan-shaped guard plates, adjustable axially along the annular sidewall, are provided on the inner sides of both the sealing plate and the machine cover. Material can enter the machine casing through the first feed inlet for initial crushing and grinding. Unqualified material selected through screening can enter the machine casing through the second feed inlet for a second crushing and grinding. This grinding device can protect the casing through fan-shaped guard plates and arc-shaped liners, and can also crush materials of different specifications in batches through its two feed inlets to achieve a certain degree of thorough hammering and grinding. However, this grinding device only has a single hammer holder on the main shaft, which not only easily leads to more concentrated wear on the hammers and shortens their service life, but also reduces the efficiency of single-pass hammering and grinding, failing to meet the need for thorough grinding of materials in a single crushing operation. At the same time, the central feeding method of this grinding device easily leads to uneven distribution of material after entering the machine casing, resulting in insufficient grinding and affecting the crushing effect.

[0004] Therefore, there is a need for a hammer crusher that can improve crushing efficiency, extend hammer life, and ensure uniform material distribution. Utility Model Content

[0005] The purpose of this invention is to provide a hammer crusher that can effectively improve crushing efficiency, extend the service life of the hammers, and ensure uniform material distribution, thereby achieving good crushing results.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A hammer crusher includes a casing with a feed hopper and a discharge port at the bottom, and a housing with several built-in liners. A rotating shaft, driven by a drive mechanism, is located inside the casing and its two ends are rotatably connected to the two ends of the casing's axial direction. Several hammer discs are spaced on the rotating shaft, and each hammer disc has several hammers arranged circumferentially. The hammers of two adjacent hammer discs are staggered. The feed hopper is located above the discharge port and on one side of the casing in the direction of upward rotation of the hammers.

[0008] A further improvement of the present invention is that the hammer head includes a hammer handle connected to the hammer disc at one end by a connector and a hammer striking part integrally formed with the other end of the hammer handle; the hammer striking part is a long strip perpendicular to the hammer disc; the staggered arrangement means that the hammer heads on two adjacent hammer discs are staggered on the circumference of the hammer disc and the ends of the hammer striking parts of the hammer heads on the two hammer discs overlap.

[0009] A further improvement of this utility model is that: both ends of the hammering part are respectively provided with integrally formed protrusions, and the overlapping part of the hammering part of the hammer head on the two hammer discs is the protrusion part.

[0010] A further improvement of this utility model is that the protrusion is set on the inner side of the hammering part.

[0011] A further improvement of the present invention is that: the hammer disc has several mounting slots for inserting hammer heads into the circumference of the hammer disc; the connecting parts include a pressure plate located on one side of the mounting slot of the hammer disc and fastening bolts that connect the pressure plate and the hammer disc to fix the hammer handle; a bushing for spacing the hammer disc is also provided between two adjacent hammer discs.

[0012] A further improvement of this utility model is that: the casing includes a cover with a fixed feed hopper at the top and a housing with a discharge port at the bottom; inside the casing, a cylindrical crushing chamber is provided within the range from the feed hopper to the discharge port, which is in the range of the hammer rotating upwards to the discharge port and is in the shape of a hammer on the rotating shaft; the rotating shaft is arranged along the axial direction of the crushing chamber and the two ends of the rotating shaft are respectively mounted on the housing at the front and rear ends of the crushing chamber by bearings; the side wall of the housing between the feed hopper and the discharge port is sloping; the cover and the housing are hinged by a pin on the opposite side of the feed hopper and connected by locking bolts at the feed hopper.

[0013] A further improvement of this utility model is that the feed hopper is connected to the crushing chamber through the feed inlet at its bottom. The side wall of the machine box near the feed hopper is inclined outward, and the side wall of the feed hopper at the feed inlet is inclined inward. When the machine cover is closed on the machine box, the inclined side wall of the machine box and the inclined side wall of the feed hopper at the feed inlet are connected to form a sloping guide wall.

[0014] A further improvement of the present invention is that: a base is provided at the bottom of the housing, and the drive mechanism includes a motor mounted on the base, a drive pulley connected to the motor via a transmission shaft, a driven pulley connected to one end of the rotating shaft, and a belt sleeved on the drive pulley and the driven pulley.

[0015] A further improvement of this utility model is that: each liner plate located in the crushing chamber of the machine casing has an arc-shaped structure, and the liner plate from the top of the crushing chamber to the discharge port is a grooved liner plate with several grooves on the inner surface along the axial direction of the crushing chamber. The liner plate from the feed port to the top of the crushing chamber is an arc-shaped liner plate without grooves on the inner surface. The liner plate located in the feed hopper and on the guide wall is a flat guard plate without grooves on the inner surface.

[0016] A further improvement of the present invention is that an L-shaped guide plate is provided on the inner side of the feed inlet of the feed hopper, which connects with the arc-shaped liner of the crushing chamber above the feed inlet.

[0017] A further improvement of this utility model is that the curvature of the arc-shaped liner and the L-shaped guide plate is greater than the curvature of the groove liner from the top of the crushing chamber to the discharge port.

[0018] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0019] This new type of hammer crusher can effectively improve crushing efficiency, extend the service life of the hammers, and ensure the uniform distribution of materials, thus achieving good crushing results.

[0020] This invention employs a rotating shaft inside the casing with several hammer discs spaced apart, and each hammer disc has several hammers arranged circumferentially. The arrangement of multiple hammer discs can effectively improve crushing efficiency. The feed hopper is located above the discharge port and is situated on the side of the casing facing the upward rotation direction of the hammers, allowing the material to be fed from the side facing the upward rotation direction of the hammers. This effectively extends the material's movement path within the casing while ensuring uniform distribution of the material upon entering the casing, increasing the number of hammer blows received by the material during the crushing process, thereby effectively improving crushing and grinding efficiency.

[0021] This invention employs an alternating arrangement of hammers on two adjacent hammer discs. The alternating arrangement of hammers allows the material to be struck more frequently and more evenly during the crushing process. It can also effectively reduce the accumulation and blockage of material during the crushing process, maintain the smooth flow of material, and the wear on the hammers on each hammer disc is more dispersed, which can effectively extend the service life of the hammers.

[0022] The hammerhead used in this invention includes a hammer handle and a striking part. The striking part is a long strip perpendicular to the hammer disc. When the rotating shaft drives the hammer disc to rotate, the striking part of the hammerhead can provide a powerful impact when the material passes through, improving the crushing efficiency and distributing wear evenly across the entire striking surface, thus extending the service life of the hammerhead. At the same time, the hammerheads on two adjacent hammer discs are staggered on the circumference of the hammer disc, and the ends of the striking parts of the hammerheads on the two hammer discs overlap, effectively limiting the jumping of the material, reducing material escape, and making the material move more stably along the predetermined crushing path, improving the crushing rate of the material. It can also better withstand the impact and wear generated during the crushing process, protecting the ends of the striking part, thereby further extending the service life of the hammerhead.

[0023] The present invention employs a hammer with integrally formed protrusions at both ends of the hammering part. The overlapping part of the hammering part of the hammer head on two adjacent hammer discs is the protrusion part, and the protrusion is located on the inner side of the hammering part, which can better withstand the impact and wear generated during the crushing process and extend the service life of the hammer head.

[0024] The housing of this utility model is a split structure, which includes a cover with a fixed feed hopper at the top and a box with a discharge port at the bottom. The cover and the box are hinged on the opposite side of the feed hopper by a pin and connected at the feed hopper by locking bolts, so that the cover can be opened or closed on the box, which is beneficial for the maintenance and repair of the internal components of the housing and reduces the downtime of the equipment.

[0025] The present invention employs a casing in which a cylindrical crushing chamber is provided within the range from the hammer head rotating upward from the feed hopper to the discharge port. This chamber is designed to mate with the rotating surface of the hammer head on the rotating shaft. The rotating shaft is positioned along the axial direction of the crushing chamber, and its two ends are respectively mounted on the front and rear end housings of the crushing chamber via bearings. This allows material to be fed into the crushing chamber from one side, and the material's movement path within the casing is the range from the hammer head rotating upward from the feed hopper to the discharge port. This effectively extends the material's movement path within the casing. The crushing chamber, which concentrates the crushing force, works in conjunction with the hammer head to ensure that the material is crushed and ground more thoroughly and effectively during the crushing process.

[0026] The feed hopper of this invention is connected to the crushing chamber through a feed inlet located at its bottom. The side wall of the machine casing near the feed hopper is inclined outward, while the side wall of the feed hopper at the feed inlet is inclined inward. When the machine cover is closed on the machine casing, the inclined side wall of the machine casing and the inclined side wall of the feed hopper at the feed inlet connect to form a sloping guide wall. The guide wall can better control the flow direction of the material and effectively guide the material smoothly into the crushing chamber to contact the hammer that rotates to the top of the discharge port. This allows the material to be better distributed and turned during the crushing process, reducing blockage and accumulation of material during the feeding process and improving the crushing effect.

[0027] This utility model employs a casing with several liners inside. Each liner within the crushing chamber has an arc-shaped structure. The liner extending from the top of the crushing chamber to the discharge port is a grooved liner. Several grooves are formed on the inner surface of the grooved liner along the axial direction of the crushing chamber. These grooves cooperate with the hammers, allowing for more thorough grinding of the material during the grinding process, thus improving grinding efficiency. The liner from the feed inlet to the top of the crushing chamber is an arc-shaped liner without grooves on its inner surface. During hammering, the material between this arc-shaped liner and the hammers is fully hammered, and the arc-shaped liner better guides the material into the rear grooved liner area, ensuring thorough grinding after hammering. The liner located inside the feed hopper and on the guide wall is a flat protective plate without grooves on its inner surface, allowing the material to smoothly and quickly enter the crushing chamber from the feed hopper for crushing.

[0028] This invention employs an L-shaped guide plate, which connects to the arc-shaped liner of the crushing chamber above the feed inlet of the hopper. This guide plate directs the material entering the hopper onto the lower guide wall, where a flat guard plate guides the material into the crushing chamber. This extends the contact time between the material and the hammers after entering the crushing chamber, improving crushing and grinding efficiency. It also effectively prevents the material from jumping and splashing due to contact with the high-speed rotating hammers when entering the crushing chamber, ensuring uniform material distribution. When the material is discharged from the hopper, it enters the crushing chamber through the feed inlet and contacts the hammers rotating above the discharge outlet. The upward-rotating hammers can rebound the material against the L-shaped guide plate and the arc-shaped liner, effectively crushing the material and facilitating subsequent grinding.

[0029] The arc-shaped liner and L-shaped guide plate used in this invention have a greater arc than the groove liner plate from the top of the crushing chamber to the discharge port. This increases the space between the arc-shaped liner and L-shaped guide plate and the hammer to accommodate materials, making the materials flow more easily during the hammering process and preventing blockage. It also helps the materials to be crushed more evenly during the crushing process, thereby obtaining a more uniform particle size distribution. Attached Figure Description

[0030] Figure 1 This is a top view schematic diagram of the external structure of the hammer crusher of this utility model;

[0031] Figure 2 This is a bottom view of the external structure of the hammer crusher of this utility model;

[0032] Figure 3 This is a schematic diagram of the overall structure of the hammer crusher of this utility model when the casing is opened;

[0033] Figure 4 This is a schematic diagram of the internal structure of the hammer crusher of this utility model;

[0034] Figure 5 This is a cross-sectional schematic diagram of the hammer crusher of this utility model;

[0035] Figure 6 This is a schematic diagram of the hammer head structure in the hammer crusher of this utility model;

[0036] Among them, 1. machine housing, 1-1. machine box, 1-2. machine cover, 1-3. locking bolt, 2. discharge port, 3. rotating shaft, 4. feed hopper, 4-1. feed port, 5. hammer disc, 6. hammer head, 6-1. hammer handle, 6-2. hammering part, 6-3. protrusion, 7. bushing, 8. pressure plate, 9. fastening bolt, 10. bearing, 11. base, 12. motor, 13. driving pulley, 14. driven pulley, 15. belt, 16. grooved liner, 17. L-shaped guide plate, 18. arc-shaped liner, 19. flat guard plate. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to embodiments:

[0038] like Figures 1-3 As shown, this utility model provides a hammer crusher, including a casing 1, a rotating shaft 3, a feed hopper 4, several hammer discs 5, several hammers 6 arranged on the hammer discs 5, and a drive mechanism. The casing 1 has a discharge port 2 at its bottom, the feed hopper 4 is mounted on the casing 1, and the casing 1 contains several liners. The rotating shaft 3 is located inside the casing 1, and its two ends are rotatably connected to the two ends of the casing 1 along its axis. The rotating shaft 3 is driven to rotate by the drive mechanism. Several hammer discs 5 are spaced and fitted onto the rotating shaft 3, and the hammer discs 5 and the rotating shaft 3 are fixed together by a key. Each hammer disc 5 has several hammers 6 arranged circumferentially. The arrangement of multiple hammer discs 5 can effectively improve crushing efficiency. Preferably, the several hammer discs 5 are evenly spaced and fitted onto the rotating shaft 3, and each hammer disc 5 has several hammers 6 arranged circumferentially. The feed hopper 4 is located above the discharge port 2, and the feed hopper 4 is located on the side of the casing 1 in the upward rotation direction of the hammer head 6, so that the material is fed from the side in the upward rotation direction of the hammer head 6, which effectively extends the movement path of the material in the casing 1 while ensuring the uniform distribution of the material when it enters the casing 1, and increases the number of times the material is hammered during the crushing process, thereby effectively improving the crushing and grinding efficiency.

[0039] Specifically, a base 11 is provided at the bottom of the casing 1, and the drive mechanism includes a motor 12, a drive pulley 13, a driven pulley 14, and a belt 15. The motor 12 is located outside the casing 1 and mounted on the base 11. The drive pulley 13 is connected to the motor 12 via a transmission shaft, and the driven pulley 14 is connected to one end of the rotating shaft 3. The belt 15 is fitted onto the drive pulley 13 and the driven pulley 14. After the motor 12 is started, the rotating shaft 3 is driven to rotate through the transmission of the drive pulley 13, the driven pulley 14, and the belt 15. This drives the multiple hammer discs 5 on the rotating shaft 3 to rotate, causing the hammers 6 on each hammer disc 5 to crush the material entering the casing 1.

[0040] Furthermore, the hammers 6 of two adjacent hammer discs 5 are arranged in a staggered manner. "Staggered" means that the hammers 6 on two adjacent hammer discs 5 are staggered on the circumference of the hammer disc 5, and the ends of the hammers 6 on two adjacent hammer discs 5 overlap. That is, the hammers 6 on one hammer disc 5 are staggered with the hammers 6 on its adjacent hammer disc 5 on the circumference of the hammer disc 5, and the ends of the hammers 6 on one hammer disc 5 partially overlap with the ends of the hammers 6 on the adjacent hammer disc 5 in space. This staggered arrangement of hammers 6 allows the material to be struck more frequently and more evenly during the crushing process, effectively reducing material accumulation and blockage, maintaining material flow, and dispersing the wear on each hammer 6 on each hammer disc 5, thus effectively extending the service life of the hammers 6. Preferably, the hammers 6 of the two spaced-apart hammer discs 5 are arranged correspondingly, that is, the hammers 6 on one hammer disc 5 and the hammers 6 on the spaced-apart hammer discs 5 are arranged correspondingly on the circumference of the hammer disc 5. This makes the material flow more smoothly in the crushing chamber, reduces clogging, ensures that the material is hit evenly when passing through different hammer discs 5, improves the crushing uniformity, and the corresponding arrangement of hammers 6 helps to balance the rotation and reduce additional wear caused by imbalance.

[0041] like Figure 6 As shown, the hammerhead 6 is a one-piece molded structure, comprising a hammer handle 6-1 and a striking part 6-2. One end of the hammer handle 6-1 is connected to the hammer disc 5 via a connector, and the other end has the striking part 6-2 integrally molded. The striking part 6-2 is a long strip perpendicular to the hammer disc 5. The striking part 6-2 can be plate-shaped, cylindrical, or other elongated structures. When the rotating shaft 3 drives the hammer disc 5 to rotate, the striking part 6-2 of the hammerhead 6 provides a powerful impact as the material passes through, improving crushing efficiency and evenly distributing wear across the entire striking surface, thus extending the service life of the hammerhead 6. When the hammer handle 6-1 is positioned in the middle of the striking part 6-2, the hammerhead 6 can present a "T" shape.

[0042] Specifically, the "interlacing" in the staggered arrangement of the hammerheads 6 on two adjacent hammer discs 5 means that the hammerheads 6 on the two adjacent hammer discs 5 are staggered on the circumference of the hammer disc 5, and the ends of the striking parts 6-2 of the hammerheads 6 on the two hammer discs 5 overlap. That is, the end of the striking part 6-2 of the hammerhead 6 on one hammer disc 5 overlaps and covers the end of the striking part 6-2 of the hammerhead 6 on the adjacent hammer disc 5 in space. This effectively restricts the jumping of materials, reduces material escape, and makes the materials move more stably along the predetermined crushing path, thereby improving the crushing rate of materials. At the same time, it can better withstand the impact and wear generated during the crushing process, protect the end of the striking part 6-2, and thus further extend the service life of the hammerheads 6.

[0043] Furthermore, each end of the hammering part 6-2 is provided with an integrally formed protrusion 6-3. The overlapping part of the hammering part 6-2 of the hammer head 6 on two adjacent hammer discs 5 is the part of the protrusion 6-3. Preferably, the protrusion 6-3 is located on the inner side of the hammering part 6-2, that is, on the side of the hammering part 6-2 facing the hammer disc 5, which can better withstand the impact and wear generated during the crushing process and extend the service life of the hammer head 6.

[0044] like Figure 4 As shown, the hammer disc 5 has several circumferentially oriented mounting slots. The hammer handle 6-1 of the hammer head 6 is inserted into these mounting slots. The connecting components include a pressure plate 8 and fastening bolts 9. The pressure plate 8 is sleeved on the rotating shaft 3 and is located on one side of the mounting slot of the hammer disc 5. The fastening bolts 9 connect the pressure plate 8 and the hammer disc 5, fixing the hammer handle 6-1 in the mounting slot of the hammer disc 5. A bushing 7 is also provided between two adjacent hammer discs 5 to separate the hammer discs 5. The bushing 7 is sleeved on the rotating shaft 3 and can be fixed by a key connection.

[0045] Furthermore, such as Figure 3 and Figure 5 As shown, the housing 1 comprises an upper cover 1-2 and a lower casing 1-1. The discharge port 2 is located at the bottom of the casing 1-1. The feed hopper 4 can be fixedly mounted on the cover 1-2 or integrally formed with the cover 1-2. The cover 1-2 and the casing 1-1 are hinged to each other on the opposite side of the feed hopper 4 via a pin, and connected at the feed hopper 4 via locking bolts 1-3. This allows the cover 1-2 to be opened or closed on the casing 1-1, facilitating maintenance and repair of the internal components of the housing 1 and reducing equipment downtime.

[0046] Inside the casing 1, a cylindrical crushing chamber is provided within the range from the hammer 6 rotating upward from the feed hopper 4 to the discharge port 2. This crushing chamber is matched with the rotating surface of the hammer 6 on the rotating shaft 3. The rotating shaft 3 is arranged along the axial direction of the crushing chamber, and both ends of the rotating shaft 3 are respectively mounted on the machine housing 1-1 at the front and rear ends of the crushing chamber through bearings 10. This allows the material to be fed from one side of the crushing chamber. The movement path of the material in the casing 1 is the range from the hammer 6 rotating upward from the feed hopper 4 to the discharge port 2. Therefore, the movement path of the material in the casing is effectively extended. The crushing chamber, which concentrates the crushing force, cooperates with the hammer 6, so that the material is crushed and ground more fully and effectively during the crushing process.

[0047] Specifically, the side wall of the casing 1-1 between the feed hopper 4 and the discharge port 2 is sloped. For example... Figure 5As shown, the feed hopper 4 is connected to the crushing chamber via the feed inlet 4-1 located at its bottom. The side wall of the casing 1-1 near the feed hopper 4 is inclined outwards, while the side wall of the feed hopper 4 at the feed inlet 4-1 is inclined inwards. When the cover 1-2 is closed on the casing 1-1, the inclined side wall of the casing 1-1 and the inclined side wall of the feed hopper 4 at the feed inlet 4-1 connect to form a sloping guide wall. The inclined guide wall can better control the flow direction of the material, effectively guiding the material smoothly into the crushing chamber to contact the hammer that rotates to the top of the discharge port 2. This allows the material to be better distributed and agitated during the crushing process, reducing blockage and accumulation of material during feeding and improving the crushing effect. Preferably, the inclination angle of the inclined side wall of the casing 1-1 and the inclined side wall of the feed hopper 4 at the feed inlet 4-1 are the same.

[0048] In order to protect the inner wall of the casing 1, the casing 1 is provided with several liner plates in its crushing chamber, diversion wall and feed hopper respectively. Each liner plate matches the shape of its respective crushing chamber, diversion wall and feed hopper 4 in the casing 1. Among them, the liner plates located in the crushing chamber of the casing 1 are all arc-shaped structures. Specifically, the liner plates from the top of the crushing chamber to the discharge port 2 are arc-shaped groove liner plates 16. Several grooves are opened on the inner surface of the groove liner plates 16 along the axial direction of the crushing chamber. The grooves on the groove liner plates 16 cooperate with the hammer head 6. During the grinding process, the material can be ground more thoroughly, which improves the grinding efficiency of the material. The liner plates from the feed port 4-1 to the top of the crushing chamber are arc-shaped liner plates 18 with no grooves on the inner surface. That is, the inner surface of the arc-shaped liner plates 18 is smooth and without grooves. During the hammering process, the material located between the arc-shaped liner plates 18 and the hammer head 6 can be fully hammered. Moreover, the arc-shaped liner plates 18 can better guide the material into the area of ​​the rear groove liner plates 16, so that the material is fully ground after being hammered. The liner plate located inside the feed hopper 4 and on the guide wall is a flat guard plate 19 with no grooves on the inner surface. That is, the inner surface of the flat guard plate 19 is smooth and without grooves, so that the material can smoothly and quickly enter the crushing chamber from the feed hopper 4 for crushing.

[0049] Furthermore, an L-shaped guide plate 17 is provided on the inner side of the feed inlet 4-1 of the feed hopper 4, which connects with the arc-shaped liner 18 of the crushing chamber above the feed inlet 4-1. Other positions inside the feed hopper 4 are flat guard plates 19. The L-shaped guide plate 17 can guide the material entering the feed hopper 4 to the lower guide wall, and the flat guard plate 19 on the guide wall can guide the material into the crushing chamber, prolonging the contact time between the material and the hammer 6 after entering the crushing chamber, improving the crushing and grinding efficiency, and effectively preventing the material from jumping and splashing due to contact with the high-speed rotating hammer 6 when entering the crushing chamber, so that the material is evenly distributed. When the material is discharged from the feed hopper 4, the material enters the crushing chamber through the feed inlet 4-1 and contacts the hammer 6 that rotates to the top of the discharge outlet 2. The upward rotating hammer 6 can rebound the material onto the L-shaped guide plate 17 and the arc-shaped liner 18, thereby effectively crushing the material for subsequent grinding.

[0050] Specifically, the L-shaped guide plate 17 includes a vertical guide plate located inside the feed hopper 4 and an arc-shaped guide plate located below the vertical guide plate and connected to the arc-shaped liner 18. The arc of the arc-shaped liner 18 and the L-shaped guide plate 17 is greater than the arc of the groove liner 16 from the top of the crushing chamber to the discharge port 2. That is, the arc of the arc-shaped guide plate 18 and the L-shaped guide plate 17 is greater than the arc of the groove liner 16 from the top of the crushing chamber to the discharge port 2, thereby increasing the space for accommodating materials between the arc-shaped liner 18 and the L-shaped guide plate 17 and the hammer 6. This makes the materials flow more easily during the hammering process, avoids material blockage during the hammering process, and also helps the materials to be crushed more uniformly during the crushing process, thereby obtaining a more uniform particle size distribution.

[0051] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A hammer crusher, comprising a casing (1) with a feed hopper (4) and a discharge port (2) at the bottom, and a housing with several built-in liners, and a rotating shaft (3) disposed inside the casing (1) and rotatably connected at both ends to the axial ends of the casing (1) by a drive mechanism, characterized in that: Several hammer discs (5) are spaced apart on the rotating shaft (3). Several hammer heads (6) are arranged circumferentially on each hammer disc (5). The hammer heads (6) of two adjacent hammer discs (5) are arranged alternately. The feed hopper (4) is located above the discharge port (2) and on the side of the casing (1) in the upward rotation direction of the hammer heads (6).

2. A hammer crusher according to claim 1, characterized in that: The hammer head (6) includes a hammer handle (6-1) connected to the hammer disc (5) at one end by a connector and a hammer striking part (6-2) integrally formed with the other end of the hammer handle (6-1); the hammer striking part (6-2) is a long strip perpendicular to the hammer disc (5); the staggered arrangement means that the hammer heads (6) on two adjacent hammer discs (5) are staggered on the circumference of the hammer disc (5) and the ends of the hammer striking parts (6-2) of the hammer heads (6) on the two hammer discs (5) overlap.

3. A hammer crusher according to claim 2, characterized in that: The two ends of the hammering part (6-2) are respectively provided with integrally formed protrusions (6-3), and the overlapping part of the hammering part (6-2) of the hammer head (6) on the two hammer discs (5) is the protrusion (6-3).

4. A hammer crusher according to claim 3, characterized in that: The protrusion (6-3) is located on the inside of the hammering part (6-2).

5. A hammer crusher according to any one of claims 2-4, characterized in that: The hammer disc (5) has several mounting slots for inserting hammer handles (6-1) of hammer heads (6) around its circumference. The connecting component includes a pressure plate (8) located on one side of the mounting slot of the hammer disc (5) and a fastening bolt (9) connecting the pressure plate (8) and the hammer disc (5) to fix the hammer handles (6-1). A bushing (7) for spacing the hammer discs (5) is also provided between two adjacent hammer discs (5).

6. A hammer crusher according to claim 1, characterized in that: The housing (1) comprises two parts: a cover (1-2) with a fixed feed hopper (4) at the top and a casing (1-1) with a discharge port (2) at the bottom. Inside the housing (1), a cylindrical crushing chamber is provided within the range from the feed hopper (4) to the discharge port (2), which is in contact with the rotating surface of the hammer (6) on the rotating shaft (3). The rotating shaft (3) is arranged along the axial direction of the crushing chamber, and the two ends of the rotating shaft (3) are respectively mounted on the casing (1-1) at the front and rear ends of the crushing chamber through bearings (10). The side wall of the casing (1-1) between the feed hopper (4) and the discharge port (2) is sloping. The cover (1-2) and the casing (1-1) are hinged on the opposite side of the feed hopper (4) by a pin and connected at the feed hopper (4) by a locking bolt (1-3).

7. A hammer crusher according to claim 6, characterized in that: The feed hopper (4) is connected to the crushing chamber through the feed inlet (4-1) at its bottom. The side wall of the machine box (1-1) near the feed hopper (4) is inclined outward, and the side wall of the feed hopper (4) at the feed inlet (4-1) is inclined inward. When the machine cover (1-2) is closed on the machine box (1-1), the inclined side wall of the machine box (1-1) and the inclined side wall of the feed hopper (4) at the feed inlet (4-1) are connected to form a sloping guide wall.

8. A hammer crusher according to claim 7, characterized in that: The bottom of the housing (1) is provided with a base (11), and the drive mechanism includes a motor (12) provided on the base (11), a drive pulley (13) connected to the motor (12) via a transmission shaft, a driven pulley (14) connected to one end of the rotating shaft (3), and a belt (15) sleeved on the drive pulley (13) and the driven pulley (14).

9. A hammer crusher according to any one of claims 7 or 8, characterized in that: Each liner in the crushing chamber of the casing (1) is an arc-shaped structure. The liner from the top of the crushing chamber to the discharge port (2) is a grooved liner (16) with several grooves on the inner surface along the axial direction of the crushing chamber. The liner from the feed port (4-1) to the top of the crushing chamber is an arc-shaped liner (18) without grooves on the inner surface. The liner inside the feed hopper (4) and on the guide wall is a flat guard plate (19) without grooves on the inner surface.

10. A hammer crusher according to claim 9, characterized in that: The feed hopper (4) has an L-shaped guide plate (17) inside the feed inlet (4-1) that connects with the arc-shaped liner (18) of the crushing chamber above the feed inlet (4-1).

11. A hammer crusher according to claim 10, characterized in that: The curvature of the arc-shaped liner (18) and the L-shaped guide plate (17) is greater than the curvature of the groove liner (16) in the range from the top of the crushing chamber to the discharge port (2).

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