A type of crusher

Abstract

This application provides a pulverizer, relating to the field of pulverizing equipment technology. It includes: a machine body, a pulverizing assembly, a screening assembly, and a drive unit. The machine body has a pulverizing chamber inside, with a feed inlet and a mounting hole on the inner wall of the chamber. The pulverizing assembly includes a drive shaft, a moving hammer frame, and a fixed blade holder. The drive shaft is horizontally positioned within the pulverizing chamber and rotatably connected to the inner wall of the chamber. The moving hammer frame is detachably connected to the shaft of the drive shaft and has moving hammer blades. The fixed blade holder is axially positioned in the mounting hole along the drive shaft and detachably connected to the machine body, with fixed blades on it. The gap between the mounting hole wall and the fixed blade holder forms a discharge port. The screening assembly includes a screen plate and a screen pressing component. The screen pressing component is detachably connected to the machine body and can press the screen plate against the discharge port. The drive unit is drively connected to the drive shaft and can drive the drive shaft to rotate. This application has the advantages of convenient maintenance and time and labor saving.

Description

Technical Field

[0001] This application relates to the field of crushing equipment technology, and in particular to a crusher. Background Technology

[0002] A crusher is a device used to crush large solid raw materials to the required size.

[0003] Existing crushers generally include a machine body, a main shaft, a crushing structure, a screen, and a drive motor. The machine body has a crushing chamber inside, with a feed inlet on the top wall and a discharge outlet on the bottom wall. The main shaft is rotatably connected to the inner wall of the crushing chamber. The crushing structure includes moving hammers and fixed blades. The fixed blades are located on the inner wall of the crushing chamber, and the moving hammers are located on the main shaft. The screen is screwed to the discharge outlet of the crushing chamber. The drive motor is connected to the main shaft and can drive the main shaft to rotate, so that the moving hammers can rotate in the crushing chamber and continuously strike the raw material against the inner wall of the crushing chamber and the fixed blades, thereby continuously crushing the raw material. The raw material crushed to the required size will pass through the screen and leave the crushing chamber from the discharge outlet.

[0004] However, because the fixed blades, moving hammers, and other components in the crushing chamber constantly collide with the material during operation, they need to be replaced immediately when one of them is worn out. Since the components in the crushing chamber are arranged relatively compactly, when replacing the fixed blades alone, the maintenance worker needs to remove the screen from the machine body first. When replacing the moving hammers on the main shaft alone, the maintenance worker needs to remove both the screen and the fixed blade holder from the machine body first. As a result, each maintenance process of the crusher requires the disassembly and reassembly of a large number of parts, which is time-consuming and labor-intensive.

[0005] Therefore, there is a need to provide a shredder. Summary of the Invention

[0006] To address the problem that the maintenance process of existing crushers requires the disassembly and assembly of a large number of parts, which is time-consuming and labor-intensive, this application provides a crusher.

[0007] The present application provides a pulverizer, which adopts the following technical solution: it includes a machine body, a pulverizing component, a screening component and a driving device. The machine body is provided with a pulverizing chamber inside, and the inner wall of the pulverizing chamber is provided with a feed inlet and a mounting hole. The crushing assembly includes a drive shaft, a movable hammer frame, and a fixed blade holder. The drive shaft is horizontally disposed in the crushing chamber and rotatably connected to the inner wall of the crushing chamber. The movable hammer frame is detachably connected to the shaft body of the drive shaft and is provided with movable hammer blades. The fixed blade holder is axially disposed in the mounting hole along the drive shaft and is detachably connected to the machine body. The fixed blade holder is provided with fixed blades. The gap between the wall of the mounting hole and the fixed blade holder forms a discharge port. The screening assembly includes a screen plate and a screen pressing component. The screen pressing component is detachably connected to the machine body and can abut the screen plate against the discharge port. The drive device is connected to the drive shaft and can drive the drive shaft to rotate.

[0008] By adopting the above technical solution, the detachable design between the moving hammer frame and the drive shaft allows maintenance workers to replace the damaged part individually when either the moving hammer frame or the drive shaft is damaged, without having to scrap both the moving hammer frame and the drive shaft, thus saving on the maintenance cost of the crusher. When it is necessary to replace the fixed blades on the fixed blade holder, maintenance workers can directly remove the fixed blade holder from the mounting hole. When it is necessary to replace the moving hammer blades on the moving hammer frame, maintenance workers can first remove the screen pressing parts and screen plates or the fixed blade holder from the mounting hole, and then remove the drive shaft and the moving hammer frame from the mounting hole into the crushing chamber. This allows maintenance workers to perform internal maintenance on the crusher without disassembling and assembling a large number of parts, saving time and effort.

[0009] Specifically, the machine body includes a first sub-shell, a second sub-shell, and a chamber partition. The first sub-shell has the feed inlet, and the second sub-shell has the mounting hole. The first sub-shell and the second sub-shell are detachably connected, and the two can be joined together to form the crushing chamber. The partition plate includes a first partition plate and a second partition plate. The first partition plate is provided with a partition plate connector, and the partition plate connector is provided with a partition plate connection hole. The second partition plate is provided with a partition plate connection groove, and the groove wall of the partition plate connection groove is provided with a partition plate screw hole. The partition plate connector can be inserted into the partition plate connection groove and screwed into the partition plate screw hole by a bolt passing through the partition plate connection hole, so that the first partition plate and the second partition plate are assembled to form the partition plate and separate the crushing chamber.

[0010] By adopting the above technical solution, when it is necessary to replace the moving hammer blades on the moving hammer frame, the maintenance worker can also choose to first separate the first sub-machine housing and the second sub-machine housing, and then take the drive shaft out of the gap between the first sub-machine housing and the second sub-machine housing to remove the crushing chamber; the partition plate is formed by the first partition plate and the second partition plate and can divide the crushing chamber, and the partition plate connecting groove can cooperate with the partition plate connecting hole for positioning, so as to achieve precise splicing of the first partition plate and the second partition plate.

[0011] Specifically, the moving hammer frame has a mounting through hole and is sleeved on the drive shaft through the mounting through hole, and an expansion sleeve is provided between the mounting through hole and the shaft body of the drive shaft.

[0012] By adopting the above technical solution, the moving hammer frame can be detachably connected to the drive shaft through the expansion sleeve, without the need to open a keyway on the drive shaft to connect the moving hammer frame and the drive shaft by a key. This ensures that the rigidity of the drive shaft will not be weakened by the keyway, thus giving the drive shaft a longer service life.

[0013] Furthermore, the movable hammer frame includes a hammer frame plate, a pin, and a locking plate. The hammer frame plate has a connecting hole on its surface. One end of the pin passes through the connecting hole and has a locking groove at that end. The movable hammer plate is rotatably connected to the shaft of the pin. The locking plate has a fixing hole and can be inserted into the locking groove and connected to the hammer frame plate by bolts passing through the fixing hole and threaded through the screw hole in the hammer frame plate.

[0014] By adopting the above technical solution, the locking plate can be inserted into the locking groove on the pin, and at the same time, it can be screwed to the hammer frame plate through the fixing hole on the locking plate by bolts, so as to fix the pin and the hammer frame plate in place.

[0015] Furthermore, the length direction of the fixed knife holder is arranged along the axial direction of the drive shaft, and the fixed knife holder is provided with baffle wing plates on both sides, and the screen plate can be abutted between the screen pressing member and the side end face of the baffle wing plate facing away from the drive shaft. The end of the fixed tool holder is provided with a stop plate extending toward the drive shaft. The wall of the mounting hole is provided with a mounting groove along the direction from the drive shaft to the side. The stop plate can be inserted into the mounting groove and abut against the groove wall.

[0016] By adopting the above technical solutions, the baffle wing plate can prevent the raw material to be crushed in the crushing chamber from bypassing the screen plate and leaking out of the crushing chamber through the gap between the screen plate and the fixed knife seat. The baffle end plate can prevent the raw material to be crushed from bypassing the screen plate and leaking out of the crushing chamber through the gap between the fixed knife seat and the hole wall of the mounting hole. This makes it less likely that when the crusher is working, a large amount of raw material will leak out of the crushing chamber from the gap around the fixed knife seat before being crushed to the required size, resulting in poor particle uniformity of the crushed product.

[0017] Furthermore, a mating surface is formed on the side of the baffle plate near the drive shaft. The mating surface can abut against the wall of the mounting groove, and the distance from the joint between the mating surface and the wall of the mounting groove to the drive shaft is less than the distance from the moving hammer to the drive shaft.

[0018] By adopting the above technical solution, since the moving hammer blades will continuously carry away the raw materials they come into contact with when the drive shaft drives the moving hammer blades to rotate, the setting of the mating surface makes it less likely for the raw materials to accumulate at the joint between the groove wall of the mounting groove and the mating surface, thus making it less likely for the raw materials to leak out of the crushing chamber from that joint.

[0019] Furthermore, the screen pressing component includes a locking component, a rotating shaft, and a frame. A mounting plate is provided on the side wall of the mounting hole away from the fixed blade holder. The locking component is provided on the mounting plate. The end of the rotating shaft is connected to the wall of the mounting hole. One side of the frame is hinged to the shaft of the rotating shaft. The other side of the frame is detachably connected to the locking component. When the frame is connected to the locking member, one side of the screen plate along the axial direction of the rotation axis can be abutted between the frame and the edge of the mounting hole, and the other side of the screen plate along the axial direction of the rotation axis can be abutted between the frame and the baffle plate. At the same time, both sides of the screen plate along the radial direction of the rotation axis can abut against the wall of the mounting hole.

[0020] By adopting the above technical solution, the frame can be connected to the locking component and the two sides of the screen plate along the axial direction of the rotation axis can be abutted between the frame and the hole edge of the mounting hole and between the frame and the baffle wing plate, respectively. The two sides of the screen plate along the radial direction of the rotation axis can abut against the hole wall of the mounting hole, so that the screen plate can block the discharge port formed by the gap between the fixed knife holder and the hole wall of the mounting hole.

[0021] Furthermore, a pair of sliding grooves are provided opposite each other on the wall of the mounting hole. Each sliding groove is gradually inclined away from the fixed tool holder in the direction from approaching to moving away from the drive shaft. Both ends of the rotating shaft are inserted into the corresponding sliding groove and can slide along the sliding groove. The screening assembly also includes a drive unit that is connected to the rotating shaft and can drive the rotating shaft to move closer to or away from the drive shaft.

[0022] By adopting the above technical solution, the drive unit drives the rotating shaft to move closer to or away from the drive shaft. When the rotating shaft moves closer to the drive shaft, it slides along the sliding groove towards the fixed blade holder; when it moves away from the drive shaft, it slides along the sliding groove away from the fixed blade holder. This allows maintenance workers to move the rotating shaft away from the drive shaft by driving the drive unit, thus removing the fixed blade holder from the notch created by the rotating shaft. A certain distance exists between the circular trajectory formed by the rotating hammer at the end furthest from the drive shaft and the inner surface of the screen plate. This distance is called the hammer-screen gap. During crushing, the raw material in the crushing chamber forms a ring layer between the moving hammer and the screen plate that rotates with the moving hammer. When the hammer-screen gap is large, the raw material particles closer to the screen plate move slower, allowing them to pass through the screen holes more quickly after being crushed to the required size, thus facilitating the crushing of the raw material into larger particles. When the hammer-screen gap is small, raw material particles closer to the screen plate have more opportunities to contact the moving hammers and move faster, making it difficult for them to pass through the screen holes. This facilitates crushing the raw material into smaller particles. The operator can control the rotation shaft movement via the drive unit according to the crushing requirements of the raw material. When it is necessary to crush the raw material into larger particles, the rotation shaft can be moved to a position farther from the drive shaft, and the installation position of the fixed blade holder can be adjusted accordingly, or a fixed blade holder with a thicker baffle can be selected. This makes the side of the screen plate between the moving shaft and the baffle plate farther from the drive shaft, thus widening the hammer-screen gap. Conversely, when it is necessary to crush the raw material into smaller particles, the rotation shaft can be moved to a position closer to the drive shaft, and the installation position of the fixed blade holder can be adjusted accordingly, or a fixed blade holder with a thinner baffle can be selected. This makes the side of the screen plate between the moving shaft and the baffle plate closer to the drive shaft, thus narrowing the hammer-screen gap. This allows for free adjustment of the hammer-screen gap, enabling the crusher to meet the processing requirements of different particle sizes.

[0023] Furthermore, the drive unit includes a connecting column, a driven threaded sleeve, a driven worm gear, and a drive worm. The connecting column has a waist-shaped hole along the direction from near to far from the fixed tool holder. The shaft of the rotating shaft passes through the waist-shaped hole and can slide along the waist-shaped hole. The threaded hole on the driven screw sleeve is arranged in a direction from close to away from the drive shaft. The bottom of the connecting post is provided with a screw that is screwed to the driven screw sleeve. The driven worm gear is connected to the driven screw sleeve and can drive the driven screw sleeve to rotate via the rotation of the driven worm gear. The drive worm meshes with the driven worm gear and can drive the driven worm gear to rotate.

[0024] By adopting the above technical solution, the drive worm can drive the driven worm wheel to rotate the driven screw sleeve. When the driven screw sleeve rotates, it will drive the screw to move the connecting column up and down, so that the connecting column can drive the rotating shaft to move closer to or away from the drive shaft.

[0025] Furthermore, a maintenance opening is provided on the side wall of the mounting hole away from the fixed tool holder, and a maintenance door is provided on the maintenance opening for sealing the maintenance opening.

[0026] By adopting the above technical solution, maintenance workers can repair or clean the internal structure of the pulverizing chamber by opening the maintenance door at the maintenance port.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. The device includes a machine body, a crushing assembly, a screening assembly, and a drive unit. The machine body has a crushing chamber with a feed inlet and a mounting hole on its inner wall. The crushing assembly includes a drive shaft, a moving hammer frame, and a fixed blade holder. The drive shaft is located in the crushing chamber and rotatably connected to its inner wall. The moving hammer frame is detachably connected to the shaft body and has moving hammer blades. The fixed blade holder is located in the mounting hole and detachably connected to the machine body, and has fixed blades. The gap between the mounting hole wall and the fixed blade holder forms a discharge outlet. The screening assembly includes screen plates and a screen pressing component. The screen pressing component is detachably connected to the machine body and can abut the screen plate against the discharge port; the drive unit is connected to the drive shaft and can drive the drive shaft to rotate. The above design allows maintenance workers to directly remove the fixed blade holder from the mounting hole when it is necessary to replace the fixed blade on the fixed blade holder. When it is necessary to replace the moving hammer plate on the moving hammer frame, maintenance workers can first remove the screen pressing component and screen plate or fixed blade holder from the mounting hole, and then remove the drive shaft and moving hammer frame from the mounting hole into the crushing chamber. This allows maintenance workers to perform internal maintenance on the crusher without disassembling a large number of parts, saving time and effort. 2. A pair of sliding grooves are formed on the wall of the mounting hole, each sliding groove gradually tilting away from the fixed blade holder in the direction from the drive shaft to the direction from the fixed blade holder. Both ends of the rotating shaft are inserted into the corresponding sliding grooves and can slide along the sliding grooves. The screening assembly also includes a drive unit, which is connected to the rotating shaft and can drive the rotating shaft to move closer to or away from the drive shaft. The above design allows the operator to control the movement of the rotating shaft through the drive unit according to the crushing requirements of the raw materials. When it is necessary to crush the raw materials into larger particles, the rotating shaft can be moved to a position farther away from the drive shaft, and the installation position of the fixed blade holder can be adjusted accordingly, or a fixed blade holder with a thicker baffle can be selected, thereby expanding the hammer screen gap. When it is necessary to crush the raw materials into smaller particles, the rotating shaft can be moved to a position closer to the drive shaft, and the installation position of the fixed blade holder can be adjusted accordingly, or a fixed blade holder with a thinner baffle can be selected, thereby narrowing the hammer screen gap. This allows for free adjustment of the hammer screen gap, enabling the crusher to meet the processing requirements of different particle sizes. Attached Figure Description

[0028] Figure 1 This is a perspective view of a shredder according to this application; Figure 2 This is a perspective view of the first casing, the partition plate, and the fixed blade holder of a crusher according to this application; Figure 3 This is an exploded view of the crushing component of a crusher according to this application; Figure 4 This is a perspective view of a pulverizer according to this application, in which a maintenance door is concealed to allow for the display of the screening components; Figure 5 yes Figure 4 A schematic enlarged view of region A, showing the screening components; Figure 6 This is a schematic cross-sectional view taken along the central axis of the drive shaft in another embodiment of this application; Figure 7 It is along Figure 6 A schematic cross-sectional view taken along the BB direction; Figure 8 It is along Figure 7 A schematic enlarged view of region C, where the connecting post on the left side of the fixed tool holder is hidden to show the sliding groove.

[0029] Reference numerals: 1. Machine body; 11. First sub-shell; 111. Feed inlet; 12. Second sub-shell; 13. Chamber partition; 131. First partition plate; 132. Second partition plate; 133. Partition plate connector; 134. Countersunk screw; 14. Mounting plate; 15. Sliding groove; 16. Maintenance door; 2. Crushing assembly; 21. Drive shaft; 22. Moving hammer frame; 221. Moving hammer blade; 222. Hollow shaft; 223. Hammer frame plate; 224. Pin; 225. Locking plate; 23. Fixed blade holder; 231. Fixed blade component 232. Material baffle wing plate; 233. Material baffle end plate; 2331. Mating surface; 24. Expansion sleeve; 3. Screening assembly; 31. Screen plate; 32. Screen pressing component; 321. Locking component; 3211. Connecting frame; 3212. Locking frame; 3213. Abutment plate; 3214. Handle; 322. Rotating shaft; 323. Frame body; 33. Drive unit; 331. Connecting column; 332. Driven threaded sleeve; 333. Driven worm gear; 334. Drive worm; 335. Rotating device; 336. Clamp; 4. Drive device. Detailed Implementation

[0030] Figure 1 This is a perspective view of a shredder according to this application. Figure 2 This is a perspective view of the first casing, the chamber partition, and the fixed blade holder of a crusher according to this application. See also... Figure 1 and Figure 2A pulverizer includes a body 1, a pulverizing assembly 2, a screening assembly 3, and a drive device 4. The body 1 includes a first sub-shell 11, a second sub-shell 12, and a chamber partition 13. The first sub-shell 11 and the second sub-shell 12 are detachably connected and can be assembled to form a pulverizing chamber. The first sub-shell 11 has a feed inlet 111 leading to the pulverizing chamber, and the second sub-shell 12 has a mounting hole leading to the pulverizing chamber. The chamber partition 13 is annular in shape and includes a semi-annular first partition plate 131 and a semi-annular second partition plate 132. The first partition plate 131 is connected to the first sub-shell 11, and a partition plate connector 133 is welded to one end of the first partition plate 131, while a partition plate connector 133 is formed at the other end. The second partition plate 132 has a plate connecting groove. One end of the second partition plate 132 is welded with a plate connecting component 133, and the other end is provided with a plate connecting groove. Each plate connecting component 133 is provided with a plate connecting hole that matches the screw head end of the countersunk screw 134. Each plate connecting groove is provided with a plate threaded hole that matches the screw end of the countersunk screw 134. Each plate connecting component 133 can be inserted into a corresponding plate connecting groove and screwed into the plate connecting hole and the plate threaded hole by the countersunk screw 134, so that the first partition plate 131 and the second partition plate 132 can be assembled to form a cavity partition 13 and separate the crushing chamber. The plate connecting groove can cooperate with the plate connecting hole for positioning, so as to achieve precise assembly of the first partition plate 131 and the second partition plate 132.

[0031] Figure 3 This is an exploded view of the crushing component of a crusher according to this application. Figure 4 This is a perspective view of a pulverizer according to this application, in which a maintenance door is concealed to allow for the display of the screening assembly. See also Figure 3 and Figure 4 The crushing assembly 2 includes a drive shaft 21, a movable hammer holder 22, and a fixed blade holder 23. The drive shaft 21 is horizontally positioned in the crushing chamber and rotatably connected to the inner wall of the chamber. The movable hammer holder 22 includes a hollow shaft 222, multiple hammer holder plates 223, multiple pins 224, and a locking plate 225. The hollow shaft 222 has a mounting through hole and is fitted onto the drive shaft 21 through the mounting through hole. The hollow shaft 222 is connected to the shaft body of the drive shaft 21 through a shrink sleeve 24, thus eliminating the need for a separate mounting plate on the drive shaft 21. The keyway is provided to connect the hollow shaft 222 and the drive shaft 21, ensuring that the rigidity of the drive shaft 21 is not weakened by the keyway, thus giving the drive shaft 21 a longer service life. The detachable design between the moving hammer frame 22 and the drive shaft 21 allows maintenance workers to replace the damaged part separately if either the moving hammer frame 22 or the drive shaft 21 is damaged, without having to scrap both the moving hammer frame 22 and the drive shaft 21, saving on the maintenance cost of the crusher.

[0032] Each hammer holder plate 223 has a through hole in the middle of its surface that matches the hollow shaft. A ring of connecting holes matching the pin 224 is also formed around the through hole on the surface of each hammer holder plate 223. The moving hammer piece 221 also has a through hole that matches the pin 224. Adjacent moving hammer pieces 221 are separated from the hammer holder plate 223 by bushings on the pin 224. Locking grooves are formed at both ends of the pin 224, and fixing holes are formed on the locking piece 225. The locking piece 225 can be inserted into the locking groove and connected to the hammer frame plate 223 by bolts through the fixing hole and the screw hole opened on the hammer frame plate 223, so as to fix the pin 224 to the hammer frame plate 223. The fixed knife holder 23 is arranged in the mounting hole along the axial direction of the drive shaft 21 and is screwed to the machine body 1. A row of fixed knife pieces 231 is provided on the top surface of the fixed knife holder 23. The gap between the two sides of the fixed knife holder 23 and the hole wall of the mounting hole forms two discharge ports.

[0033] Figure 5 yes Figure 4 A schematic enlarged view of region A, showing the screening assembly. See also Figure 4 and Figure 5 The screening assembly 3 includes a pair of screen plates 31 and a pair of screen pressing components 32. Each discharge port is provided with a screen plate 31 and a screen pressing component 32. The screen pressing component 32 includes a rotating shaft 322, a frame 323, and a locking component 321. The end of the rotating shaft 322 is connected to the wall of the mounting hole. One side of the frame 323 is hinged to the shaft of the rotating shaft 322, and the other side of the frame 323 is provided with a hook. The locking component 321 includes a connecting frame 3211 and a locking frame 3212. A mounting plate 14 is provided on the side wall of the mounting hole away from the fixed knife holder 23. One side of the connecting frame 3211 is hinged to the mounting plate 14, and the other side of the connecting frame 3211 is provided with a guide rod; the locking frame 3212 includes a locking post adapted to the hook, an abutment plate 3213, a rotating rod and a handle 3214. The abutment plate 3213 has a sliding hole and is sleeved on the guide rod through the sliding hole. The abutment plate 3213 can drive the locking post to move closer to or away from the rotating shaft 322 along the guide rod. A nut is screwed to the end of the guide rod away from the connecting frame 3211, and a compression spring is provided between the nut and the abutment plate 3213.

[0034] The middle of the rotating rod is hinged to the end of the abutment plate 3213. One end of the rotating rod is connected to the locking post, and the other end is connected to the handle 3214, so that the user can rotate the handle 3214 towards the rotating shaft 322 to drive the hook to rotate away from the rotating shaft 322, ultimately locking the hook onto the locking post. The frame 323 can be connected to the locking member 321, and the two sides of the screen plate 31 along the axial direction of the rotating shaft 322 are respectively abutted between the frame 323 and the edge of the mounting hole, and between the frame 323 and the baffle wing plate 232. Both sides of the plate 31 along the radial direction of the rotation axis 322 can abut against the wall of the mounting hole, so that the screen plate 31 can block the discharge port formed by the gap between the fixed knife holder 23 and the wall of the mounting hole; the user can also rotate the handle 3214 away from the rotation axis 322, so that the locking post can be rotated towards the rotation axis 322, thereby removing the hook from the locking post and replacing the screen plate 31; the drive device 4 is connected to the drive shaft 21, and the drive device 4 can be a rotary motor, so that the drive shaft 21 can be driven to rotate by the drive device 4.

[0035] With the above design, when it is necessary to replace the fixed blade 231 on the fixed blade holder 23, the maintenance worker can directly remove the fixed blade holder 23 from the mounting hole. When it is necessary to replace the drive shaft 21 or the hammer frame plate 223, moving hammer 221 and other components on the drive shaft 21, the maintenance worker can first remove the screen pressing part 32 and screen plate 31 or the fixed blade holder from the mounting hole, and then take the drive shaft 21 and moving hammer frame 22 out of the mounting hole from the crushing chamber. Alternatively, the first sub-casing 11 and the second sub-casing 12 can be separated first, and then the drive shaft 21 can be taken out of the crushing chamber from the gap between the first sub-casing 11 and the second sub-casing 12. This allows the maintenance worker to perform internal maintenance on the crusher without disassembling and assembling a large number of parts, saving time and effort.

[0036] See Figure 1 and Figure 2The fixed blade holder 23 has baffle wing plates 232 on both sides. The screen plate 31 can be abutted between the screen pressing member 32 and the baffle wing plate 232 on the side facing away from the drive shaft 21, so that the raw material being crushed in the crushing chamber is not easy to bypass the screen plate 31 and leak out of the crushing chamber through the gap between the screen plate 31 and the fixed blade holder 23. The end of the fixed blade holder 23 has a baffle end plate 233 extending towards the drive shaft 21. The wall of the mounting hole has a mounting groove along the direction from near to away from the drive shaft 21. The baffle end plate 233 can be inserted into the mounting groove and abut against the groove wall of the mounting groove, so that the raw material being crushed is not easy to bypass the screen plate 31 and leak out of the crushing chamber through the gap between the fixed blade holder 23 and the wall of the mounting hole. Therefore, when the crusher is working, it is not easy for a lot of raw material to leak out of the crushing chamber from the gap around the fixed blade holder 23 before being crushed to the required size, resulting in poor particle uniformity of the crushed product.

[0037] Specifically, a maintenance port leading to the screening component 3 can be opened on the machine body 1. The maintenance port is equipped with a maintenance door 16 for sealing the maintenance port, so that maintenance workers can repair or clean the structure inside the crushing chamber by opening the maintenance door 16 at the maintenance port.

[0038] See Figure 1 and Figure 2 A mating surface 2331 is formed on the side edge of the baffle plate 233 near the drive shaft 21. This mating surface 2331 can abut against the wall of the mounting groove, and the distance from the joint between the mating surface 2331 and the wall of the mounting groove to the drive shaft 21 is less than the distance from the farthest end of the moving hammer 221 to the drive shaft 21. Through the above design, since the moving hammer 221 will continuously carry away the material it contacts when the drive shaft 21 drives it to rotate, the setting of the mating surface 2331 makes it less likely for the material to accumulate at the joint between the wall of the mounting groove and the mating surface 2331, thereby making it less likely for the material to leak out of the crushing chamber from this joint.

[0039] Figure 6 This is a schematic cross-sectional view taken along the central axis of the drive shaft in another embodiment of this application. Figure 7 It is along Figure 6 A schematic cross-sectional view taken along the BB direction. See also Figure 6 and Figure 7In another embodiment provided in this application, a pair of sliding grooves 15 are provided opposite to each other on the wall of the mounting hole. Each sliding groove 15 is gradually inclined away from the fixed knife holder 23 in the direction from approaching to moving away from the drive shaft 21. Both ends of the rotating shaft 322 are inserted into the corresponding sliding groove 15 and can slide along the sliding groove 15. The screening assembly 3 also includes a drive unit 33, which is connected to the rotating shaft 322 and can drive the rotating shaft 322 to approach or move away from the drive shaft 21.

[0040] With the above design, the drive unit 33 drives the rotating shaft 322 to move closer to or away from the drive shaft 21. When the rotating shaft 322 is close to the drive shaft 21, it slides along the sliding groove 15 towards the fixed tool holder 23. When it is away from the drive shaft 21, it slides along the sliding groove 15 away from the fixed tool holder 23. This allows the maintenance worker to move the rotating shaft 322 away from the drive shaft 21 by driving the rotating shaft 322 away from the fixed tool holder 23, so that when the fixed tool holder 23 needs to be disassembled, the maintenance worker can remove the fixed tool holder 23 from the notch created by the rotating shaft 322.

[0041] It is understandable that when the circular trajectory formed by the end of the moving hammer 221 furthest from the drive shaft 21 rotates, there will be a certain gap between it and the inner surface of the screen plate 31. This gap is called the hammer-screen gap. When the crusher is working, the raw material in the crushing chamber will form a ring layer between the moving hammer 221 and the screen plate 31 that can rotate with the moving hammer 221. When the hammer-screen gap is large, the raw material particles closer to the screen plate 31 move at a slower speed, so that these raw material particles can pass through the screen holes on the screen plate 31 more quickly after being crushed to the required size, which is conducive to crushing the raw material into larger particles. When the hammer-screen gap is small, the raw material particles closer to the screen plate 31 have more opportunities to contact the moving hammer 221 and move at a faster speed, making it difficult for them to pass through the screen holes, which is conducive to crushing the raw material into smaller particles.

[0042] Therefore, the worker can control the rotation shaft 322 to move according to the crushing requirements of the raw materials through the drive unit 33. When it is necessary to crush the raw materials into larger particles, the rotation shaft 322 can be moved to a position farther away from the drive shaft 21, and the installation position of the fixed blade holder 23 can be adjusted accordingly, or a fixed blade holder 23 with a thicker baffle wing plate 232 can be selected. This makes the side of the screen plate 31 located between the moving shaft and the baffle wing plate 232 farther away from the drive shaft 21, thereby expanding the hammer screen gap. When it is necessary to crush the raw materials into smaller particles, the rotation shaft 322 can be moved to a position closer to the drive shaft 21, and the installation position of the fixed blade holder 23 can be adjusted accordingly, or a fixed blade holder 23 with a thinner baffle wing plate 232 can be selected. This makes the side of the screen plate 31 located between the moving shaft and the baffle wing plate 232 closer to the drive shaft 21, thereby reducing the hammer screen gap. This allows for free adjustment of the hammer screen gap, enabling the crusher to meet the processing requirements of different particle sizes.

[0043] Figure 8 It is along Figure 7 A schematic enlarged view of region C, where the connecting post on the left side of the fixed tool holder is hidden to show the sliding groove. See also Figure 6 and Figure 8 Specifically, the drive unit 33 includes four square connecting posts 331, four driven threaded sleeves 332, four driven worm gears 333, two drive worms 334, and two rotating devices 335. A rotating shaft 322 is provided on each side of the fixed tool holder 23. Each square connecting post 331 has a slotted hole extending from near to far from the fixed tool holder 23. The end of each rotating shaft 322 is inserted into the slotted hole on a square connecting post 331 and can slide along the slotted hole. Each square connecting post 331 is also fitted with a matching clamp 336. Each clamp 336 is connected to the machine body 1 and can restrict the rotation of the corresponding square connecting post 331. Each square connecting post 331 can slide within the clamp 336 in a direction extending from near to far from the drive shaft 21. The threaded holes on each driven threaded sleeve 332 extend from near to far from the drive shaft 21. The connecting post 331 is positioned away from the drive shaft 21. Each connecting post 331 has a screw at its bottom that is screwed to the driven sleeve 332. Each driven worm wheel 333 is connected to a corresponding driven sleeve 332 and can drive the corresponding driven sleeve 332 to rotate through the rotation of each driven worm wheel 333. Each drive worm 334 has a driven worm wheel 333 on both sides and can drive two driven worm wheels 333 to rotate. Each rotating device 335 is connected to a drive worm 334. The rotating device 335 can be a stepper motor to control the rotation of the drive worm 334 to drive the driven worm wheel 333 to drive the driven sleeve 332 to rotate. When the driven sleeve 332 rotates, it drives the screw to drive the connecting post 331 to move up and down, so that the drive unit 33 can drive the two rotating shafts 322 to move closer to or away from the drive shaft 21.

[0044] The implementation principle of the pulverizer described in this application is as follows: When it is necessary to replace the fixed blade 231 on the fixed blade holder 23, the maintenance worker can directly remove the fixed blade holder 23 from the mounting hole. When it is necessary to replace the drive shaft 21 or the hammer holder plate 223, moving hammer 221 and other parts on the drive shaft 21, the maintenance worker can first remove the screen pressing part 32 and screen plate 31 or the fixed blade holder from the mounting hole, and then remove the drive shaft 21 and moving hammer holder 22 from the mounting hole to the crushing chamber. Alternatively, the worker can first separate the first sub-machine housing 11 and the second sub-machine housing 12, and then remove the drive shaft 21 from the gap between the first sub-machine housing 11 and the second sub-machine housing 12 to the crushing chamber. This allows the maintenance worker to perform internal maintenance on the crusher without disassembling and assembling a large number of parts, saving time and effort.

[0045] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pulverizer, characterized in that: It includes a machine body (1), a crushing assembly (2), a screening assembly (3) and a drive device (4). The machine body (1) has a crushing chamber inside, and the inner wall of the crushing chamber has a feed inlet (111) and a mounting hole. The crushing assembly (2) includes a drive shaft (21), a moving hammer frame (22), and a fixed blade holder (23). The drive shaft (21) is arranged horizontally in the crushing chamber and is rotatably connected to the inner wall of the crushing chamber. The moving hammer frame (22) is detachably connected to the shaft body of the drive shaft (21), and the moving hammer frame (22) is provided with moving hammer blades (221). The fixed blade holder (23) is arranged axially in the mounting hole along the drive shaft (21) and is detachably connected to the machine body (1). The fixed blade holder (23) is provided with fixed blades (231). The gap between the wall of the mounting hole and the fixed blade holder (23) forms a discharge port. The screening assembly (3) includes a screen plate (31) and a screen pressing component (32). The screen pressing component (32) is detachably connected to the machine body (1) and can press the screen plate (31) against the discharge port. The drive device (4) is connected to the drive shaft (21) and can drive the drive shaft (21) to rotate; The machine body (1) includes a first sub-shell (11), a second sub-shell (12), and a partition plate (13). The first sub-shell (11) has a feed inlet (111), and the second sub-shell (12) has a mounting hole. The first sub-shell (11) and the second sub-shell (12) are detachably connected and can be joined together to form the crushing chamber. The partition plate includes a first partition plate (131) and a second partition plate (132). 31) is provided with a partition plate connector (133), the partition plate connector (133) is provided with a partition plate connection hole, the second partition plate (132) is provided with a partition plate connection groove, the groove wall of the partition plate connection groove is provided with a partition plate screw hole, the partition plate connector (133) can be inserted into the partition plate connection groove and screwed to the partition plate screw hole by a bolt passing through the partition plate connection hole, so that the first partition plate (131) and the second partition plate (132) are assembled to form the partition plate and separate the crushing chamber; The movable hammer frame (22) includes a hammer frame plate (223), a pin (224), and a locking plate (225). A connecting hole is provided on the surface of the hammer frame plate (223). One end of the pin (224) passes through the connecting hole and a locking groove is provided at the end of the pin. The movable hammer plate (221) is rotatably connected to the shaft of the pin (224). A fixing hole is provided on the locking plate (225), and the locking plate (225) can be inserted into the locking groove and connected to the hammer frame plate (223) by bolts passing through the fixing hole and screwed into the screw hole provided on the hammer frame plate (223). The fixed knife holder (23) is arranged along the axial direction of the drive shaft (21) in the length direction, and the fixed knife holder (23) is provided with baffle wing plates (232) on both sides. The screen plate (31) can be abutted between the screen pressing member (32) and the baffle wing plate (232) on the side facing away from the drive shaft (21). The end of the fixed knife holder (23) is provided with a baffle end plate (233) extending towards the drive shaft (21). The wall of the mounting hole is provided with a mounting groove along the direction from near to away from the drive shaft (21). The baffle end plate (233) can be inserted into the mounting groove and abut against the groove wall of the mounting groove. The screen pressing component (32) includes a locking component (321), a rotating shaft (322), and a frame (323). A mounting plate (14) is provided on the side wall of the mounting hole away from the fixed blade holder (23). The locking component (321) is mounted on the mounting plate (14). The end of the rotating shaft (322) is connected to the wall of the mounting hole. One side of the frame (323) is hinged to the shaft of the rotating shaft (322), and the other side of the frame (323) is detachably connected to the locking component (321). When the frame (323) is connected to the locking member (321), one side of the screen plate (31) along the axial direction of the rotating shaft (322) can be abutted between the frame (323) and the edge of the mounting hole, and the other side of the screen plate (31) along the axial direction of the rotating shaft (322) can be abutted between the frame (323) and the baffle wing plate (232), and at the same time, both sides of the screen plate (31) along the radial direction of the rotating shaft (322) can abut against the hole wall of the mounting hole; The mounting hole has a pair of sliding grooves (15) opposite each other on its wall. Each sliding groove (15) is gradually inclined away from the fixed knife holder (23) in the direction from approaching to moving away from the drive shaft (21). Both ends of the rotating shaft (322) are inserted into the corresponding sliding groove (15) and can slide along the sliding groove (15). The screening assembly (3) also includes a drive unit (33), which is connected to the rotating shaft (322) and can drive the rotating shaft (322) to approach or move away from the drive shaft (21).

2. The pulverizer according to claim 1, characterized in that: The moving hammer frame (22) has an installation through hole and is sleeved on the drive shaft (21) through the installation through hole. An expansion sleeve (24) is provided between the installation through hole and the shaft body of the drive shaft (21).

3. A pulverizer according to claim 1, characterized in that: A mating surface (2331) is formed on the side edge of the baffle end plate (233) near the drive shaft (21). The mating surface (2331) can abut against the groove wall of the mounting groove, and the distance from the joint between the mating surface (2331) and the groove wall of the mounting groove to the drive shaft (21) is less than the distance from the moving hammer (221) to the drive shaft (21).

4. A pulverizer according to claim 1, characterized in that: The drive unit (33) includes a connecting post (331), a driven threaded sleeve (332), a driven worm gear (333), and a drive worm (334). The connecting post (331) has a waist-shaped hole along the direction from near to far from the fixed tool holder (23). The shaft of the rotating shaft (322) passes through the waist-shaped hole and can slide along the waist-shaped hole. The threaded hole on the driven threaded sleeve (332) is arranged in a direction from close to away from the drive shaft (21). The bottom of the connecting post (331) is provided with a screw that is screwed to the driven threaded sleeve (332). The driven worm gear (333) is connected to the driven threaded sleeve (332) and can drive the driven threaded sleeve (332) to rotate via the rotation of the driven worm gear (333). The drive worm (334) meshes with the driven worm gear (333) and can drive the driven worm gear (333) to rotate.

5. A pulverizer according to claim 1, characterized in that: A maintenance opening is provided on the side wall of the mounting hole away from the fixed tool holder (23), and a maintenance door (16) is provided on the maintenance opening for sealing the maintenance opening.

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