A crusher

Abstract

The application relates to the technical field of crushers, in particular to a crusher which comprises a rack, sieve plates and crushing hammers, the sieve plates are arranged at the bottom of the rack in multiple and arc-shaped distribution, sieve holes are formed between two adjacent sieve plates, a movable plate is elastically and slidably arranged on the left side wall of the sieve hole along the length direction of the crushing hammer, friction teeth are arranged on the opposite surfaces of the movable plate and the sieve plate so that the movable plate can crush materials when moving away from the rotating center of the crushing hammer, a pushing assembly is rotatably arranged on each sieve plate, a movable part is slidably arranged on the front side of the pushing assembly, a reset piece is arranged between the movable part and the sieve plate, a driving piece is arranged between the movable part and the rotating center of the crushing hammer, and a connecting piece is arranged between the movable plate and the movable part; the materials in the sieve hole are worn and then fall off through the movement of the movable part, and the materials not falling off in the sieve hole are removed by the pushing assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crushers, in particular to a crusher. BACKGROUND

[0002] The hammer crusher is a kind of equipment that uses the impact force of high-speed rotating hammer head to break the material, which belongs to an impact crusher, and has the characteristics of simple structure, large crushing ratio and high production efficiency, and is applied to the industries of mine, cement, building material, chemical industry, electric power and the like, and is especially suitable for medium crushing and fine crushing of medium-hardness and brittle materials (such as limestone, coal, gypsum, shale and the like).

[0003] The Chinese patent document with the authorized announcement number CN118320937B discloses a raw coal hammer crusher, relating to the technical field of hammer crushers, which comprises a base, a fixed frame fixedly arranged on the top of the base, a shell fixedly installed on the top of the fixed frame and being a cylindrical structure, shafts arranged at equal intervals on the central axis of the shell, and the shafts at both ends are rotatably connected with both ends of the shell, a connecting mechanism arranged between every two groups of shafts, breakage rods arranged at equal intervals on the outer wall of the shaft, anti-blocking mechanisms arranged on the end of the breakage rods, a driving mechanism arranged on the end of a group of shafts on the top of the base, and a feed inlet arranged on the top of the shell. The raw coal block breaking effect is improved by arranging the connecting mechanism, and the anti-blocking mechanism and the screening mechanism can dredge the blocked screen holes, and can better perform secondary beating on the coal blocks that cannot be screened and improve the screening effect.

[0004] In the above technical solution, the flexible ball is arranged on the hammer head to dredge the blocked screen holes, but in actual scenarios, in order to break the raw materials, the screen plate is usually arranged to be relatively thick, and when the flexible ball is arranged on the hammer head to dredge the screen, due to the relatively high rotating speed of the hammer head, the depth of the ball inserted into the gap between the screen plates should not be too deep, and the arrangement of the ball can move the material towards the bottom of the screen plate, and when the screen plate is relatively thick, the material is easily stuck at the bottom of the gap between the screen plates and cannot be moved out from the screen plates. SUMMARY

[0005] The present application provides a kind of crusher, to solve the problem of related technology that the screen plate is easily blocked when material is broken.

[0006] The present application provides a kind of crusher, which comprises a rack, a screen plate and a breaking hammer. The screen plate is arranged at the bottom of the rack and is in an arc shape. A screen hole is formed between two adjacent screen plates. An elastic plate is arranged on the left side wall of the screen hole along the length direction of the breaking hammer. Friction teeth are arranged on the opposite surfaces of the screen plate and the elastic plate to break the material when the elastic plate moves away from the rotating center of the breaking hammer.

[0007] A pushing assembly is rotatably provided on each screen plate, a movable part is provided on the front side of the pushing assembly for sliding forward and backward, a reset part is installed between the movable part and the screen plate, a driving part is installed between the movable part and the rotation center of the breaker hammer, and a connecting part is installed between the movable plate and the movable part so that when the movable plate moves away from the rotation center of the breaker hammer, the movable part moves forward, and after the movable part moves a certain distance forward, when the breaker hammer rotates, the driving part causes the end of the pushing assembly to rotate from the bottom of the screen plate to the sieve hole.

[0008] The effect is that: by setting the movable plate, when the crushed material is stuck between the movable plate and the screen plate, the breaker hammer rotates to move the material toward the screen hole and the movable plate moves toward the bottom of the screen hole, and the friction teeth arranged on the movable plate and the screen plate are used to wear the stuck material and drop it from the screen hole; when the material is still stuck between the movable plate and the screen plate, the movable part is moved forward through the connecting part when the movable plate descends, and the movable part is rotated by the driving part when the breaker hammer rotates, thereby driving the pushing component to move, and the material is separated from between the screen plate and the movable plate by the push of the pushing component, and the movable plate is reset under the action of the spring to push the material at the top of the screen hole upward to avoid clogging of the screen hole.

[0009] Preferably, a spring is provided on the front and rear sides of the movable plate, one end of the spring is connected to the movable plate, and the other end is connected to the screen plate, and a plurality of slide grooves are provided under the screen plate forming the left side wall of the screen hole, and a sliding rod connected to the movable plate is slidingly provided in the slide groove; by arranging the spring, when the movable plate is pushed to move toward the bottom of the screen hole, the spring accumulates force, and when the material separates from between the screen hole and the screen plate, the spring resets and pushes the material above the screen hole to move toward the rotation center of the breaker hammer to avoid clogging of the screen hole. By arranging the sliding rod and the slide groove, the movable plate is always in contact with the left side screen plate when sliding, avoiding material getting stuck between the movable plate and the screen plate. At the same time, the sliding rod is arranged at the bottom of the screen plate, which will not be affected when the material falls from the screen hole.

[0010] Preferably, the pushing assembly includes a rotating shaft, a connecting rod, a mounting shaft and a knocking rod, the rotating shaft is rotatably arranged in the middle of the sieve plate, and avoidance grooves are opened on the front and rear sides of the bottom of the sieve plate, one end of the connecting rod is connected to the rotating shaft, and the other end extends from the avoidance groove to the mounting shaft and is fixedly connected to the mounting shaft, the mounting shaft extends from one end of the sieve hole to the other end, and multiple knocking rods are provided and evenly distributed on the mounting shaft; when the rotating shaft rotates the moving angle, it drives the connecting rod and the mounting shaft to rotate, and then drives the knocking rod to rotate, when the rotating shaft does not rotate, the knocking rod is located at the bottom of the sieve plate, which will not affect the falling of the material, and the connecting rod rotates in the avoidance groove, so that the avoidance groove is opened at the front and rear ends of the sieve plate, which will not affect the strength of the sieve plate, and at the same time can prevent the material from getting stuck in the avoidance groove when falling from the sieve hole.

[0011] Preferably, the end of the knocking rod is conical. When the knocking rod rotates into the sieve hole, the material is directly crushed by the knocking rod, so that the crushed material falls from the sieve hole; when the hardness of the material is not high, when the knocking rod rotates a certain angle, the material stuck between the sieve plate and the movable plate can be crushed and fall from the sieve hole.

[0012] Preferably, the movable part is a sliding sleeve, a sliding block is fixedly provided on the outer periphery of the rotating shaft, a limiting groove is provided on the inner wall of the sliding sleeve, and the sliding block is slidably arranged in the limiting groove so that the sliding sleeve can be slid on the rotating shaft in the front and rear directions, and limit the relative rotation between the sliding sleeve and the rotating shaft; by setting a sliding connection between the sliding sleeve and the rotating shaft, when the sliding sleeve slides forward a certain distance, the driving member can drive the rotating shaft to rotate.

[0013] Preferably, the reset member is a torsion spring, which is sleeved on the outer periphery of the front end portion of the rotating shaft, with one end of the torsion spring connected to the movable portion and the other end connected to the screen plate; by arranging the torsion spring, when the sliding sleeve slides forward a certain distance, the torsion spring is stretched, and when the sliding sleeve loses the upward thrust, the sliding sleeve moves backward and resets under the tension of the torsion spring, and when the sliding sleeve is pushed to rotate a certain angle, the torsion spring twists, and when the sliding sleeve loses the rotational force, it resets under the action of the torsion spring.

[0014] Preferably, the driving member includes a protrusion fixedly provided on the movable part and a push rod fixedly provided on the rotation center of the breaker hammer, and the protrusion is located on the left side of the line between the center of the rotating shaft and the rotation center of the breaker hammer; when the breaker hammer rotates, it drives the push rod to rotate, and when the push rod rotates, it contacts the protrusion and pushes the protrusion to rotate a certain angle and then disengages from the protrusion, and when the protrusion rotates, the sliding sleeve rotates synchronously, and when the push rod disengages from the protrusion, the sliding sleeve is reset under the action of torsion.

[0015] Preferably, the driving member includes a gear fixedly provided on the movable part and a connecting rod fixedly provided on the rotation center of the breaker hammer, and an arc-shaped rack is fixedly provided on the end of the connecting rod, and the arc-shaped rack is engaged with the gear; the rotation of the breaker hammer drives the connecting rod to rotate and then drives the arc-shaped rack to engage with the gear, and the gear is rotated by the arc-shaped rack and then drives the sliding sleeve to rotate, and when the arc-shaped rack is out of contact with the gear, the sliding sleeve is reset under the action of the torsion spring.

[0016] Preferably, the connecting member includes a connecting block fixedly arranged at the front end of the movable plate, the bottom of the connecting block is provided with a slope slanting downward from front to back, and the sliding sleeve is fixedly provided with a protrusion abutting the slope; when the movable plate moves toward the bottom of the sieve hole, the connecting block moves with the movable plate and causes the slope to push the protrusion toward the front, thereby causing the sliding sleeve to move toward the front, thereby causing the driving member to drive the sliding sleeve to rotate.

[0017] Preferably, the rotation angle of the connecting rod is between 30-45 degrees, so that the end of the knocking rod extends into the sieve hole for a distance and thus pushes the material in the sieve hole upward; the knocking rod is able to extend into the sieve hole by rotating the connecting rod to a certain angle, so that the material between the movable plate and the sieve plate is separated.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are:

[0019] When the material is crushed, it is put into the crusher. When the material falls between the screen plates, the shear force formed between the breaker hammer and the screen plate breaks the stone, causing the broken stone to fall from the sieve holes formed between the screen plates. Some of the material will be stuck between the movable plate and the screen plate when falling and is difficult to fall. When other materials continue to fall, the new material is pushed by the breaker hammer to squeeze the material stuck between the movable plate and the screen plate to continue moving downward. The material is crushed by the friction teeth on the opposite surface of the movable plate and the screen plate, and then the material falls;

[0020] When the movable plate moves to the bottom of the sieve hole and still cannot crush the material, the movable plate moves down and the connecting part pushes the movable part to slide forward. At this time, the driving part can push the movable part to rotate and thus make the pushing component run. The rotating shaft on the pushing component is pushed to rotate a certain angle and then drives the knocking rod to rotate from the bottom of the sieve plate to the sieve hole. The knocking rod pushes the material stuck between the movable plate and the sieve plate to move toward the direction of the breaker hammer, so that the material re-enters the crushing space for crushing. After the material moves out from between the movable plate and the sieve plate, the movable plate is quickly reset under the action of the spring and pushes the newly entered material between the sieve holes to move upward. The pushing assembly and the movable part are reset under the action of the reset part, and the above process is repeated when material is stuck between the movable plate and the sieve hole again to avoid material getting stuck in the sieve hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the breaker hammer and frame structure of the present invention.

[0022] Figure 2 It is a front structural schematic diagram of the frame of the present invention.

[0023] Figure 3 It is a schematic diagram of the screen plate and frame structure of the present invention.

[0024] Figure 4 It is a structural schematic diagram of a specific embodiment of the driving member of the present invention.

[0025] Figure 5 Schematic diagram of the structure of another specific embodiment of the driving member of the present invention.

[0026] Figure 6 Schematic diagram of the structure of the connecting piece of the present invention.

[0027] Figure 7 It is a structural schematic diagram of the pushing component of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the reset member of the present invention.

[0029] Reference numerals:

[0030] 1. Screen plate; 2. Crushing hammer; 3. Movable plate; 4. Friction teeth; 5. Pushing assembly; 51. Rotating shaft; 52. Connecting rod; 53. Mounting shaft; 54. Knocking rod; 55. Avoidance groove; 6. Connecting piece; 61. Connecting block; 62. Inclined surface; 63. Protrusion; 7. Movable part; 71. Sliding block; 72. Limiting groove; 8. Resetting piece; 9. Driving piece; 91. Protrusion; 92. Pushing rod; 93. Gear; 94. Arc rack; 10. Frame; 11. Screen hole; 12. Spring; 13. Slide groove; 14. Sliding rod; 15. Crushing plate. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figures 1-8 As shown, a crusher includes a frame 10, a screen plate 1, a breaking hammer 2, and a movable plate 3. A plurality of screen plates 1 are provided and fixed on the frame 10. A sieve hole 11 is formed between two adjacent sieve plates 1. The movable plate 3 is elastically slidably set on the left side wall of the sieve hole 11. Friction teeth 4 are provided on the two opposite surfaces of the movable plate 3 and the sieve plate 1.

[0033] When the material is crushed, the material is poured into the crusher, and the crushing hammer 2 hits the material to crush it. The uncrushed material falls into the sieve hole 11 at the bottom of the frame 10. When the crushing hammer 2 rotates, the shear force applied by the crushing hammer 2 to the material is used to crush the material. At this time, some of the crushed material falls from the sieve hole 11, and the remaining part of the material that has not been completely crushed will be stuck between the sieve plate 1 and the movable plate 3. As other larger materials fall, this part of the material will be superimposed on the material stuck between the sieve plate 1 and the movable plate 3. When the crushing hammer 2 rotates, it will push the material toward the bottom of the sieve hole 11, and the movable plate 3 will also move toward the bottom of the sieve hole 11. Since friction teeth 4 are provided between the movable plate 3 and the sieve plate 1, when the material is worn, it will fall from the sieve hole 11. At the same time, when the movable plate 3 is reset, it will push the material above toward the crushing hammer 2 to crush the material.

[0034] The front and rear ends of the frame 10 are provided with partition plates to enclose the screen plate 1 between the front and rear partition plates, and a crushing space is formed between the partition plates, the screen plate 1 and the breaker hammer 2. The front and rear ends of the movable plate 3 extend out of the crushing space for a distance, and the front and rear sides of the movable plate 3 are provided with springs 12, one end of the spring 12 is connected to the movable plate 3, and the other end is connected to the screen plate 1; when the material between the movable plate 3 and the screen plate 1 falls, the movable plate 3 is quickly reset under the action of the spring 12 and pushes the material between the sieve holes 11 to move toward the breaker hammer 2, clearing the material in the sieve holes 11, forming a plurality of slide grooves 13 under the sieve plate 1 on the left side of the sieve hole 11, and a sliding rod 14 connected to the movable plate 3 is slidingly provided in the slide groove 13; by arranging the slide groove 13 and the sliding rod 14, the movable plate 3 can be fitted on the left side wall of the sieve hole 11 to prevent material from falling into the gap between the movable plate 3 and the sieve plate 1.

[0035] When the movable plate 3 slides to the extreme position away from the breaker 2, the friction teeth 4 may not have worn the material yet. At this time, the material is stuck between the screen plate 1 and the movable plate 3. The movable plate 3 is stuck by the material and cannot be reset. When other materials fall, they will gradually get stuck in the screen hole 11, eventually causing the screen hole 11 to be blocked. This problem is solved by setting the pushing component 5, the connecting part 6, the movable part 7, the reset part 8, and the driving part 9.

[0036] A pushing assembly 5 is rotatably provided on each screen plate 1, and a movable part 7 is provided on the front side of the pushing assembly 5 for sliding forward and backward. A reset part 8 is installed between the movable part 7 and the screen plate 1, and a driving part 9 is installed between the movable part 7 and the breaker hammer 2. A connecting part 6 is installed between the movable plate 3 and the movable part 7 so that when the movable plate 3 moves toward the rotation center away from the breaker hammer 2, the movable part 7 moves forward. After the movable part 7 moves forward for a distance, when the breaker hammer 2 rotates, the driving part 9 rotates the end of the pushing assembly 5 from the bottom of the screen plate 1 to the sieve hole 11, and the material between the movable plate 3 and the sieve hole 11 is crushed or pushed upward. The crushed material falls from the gap between the sieve hole 11 and the movable plate 3, and the material pushed upward moves toward the crushing space, so that the material is crushed by the breaker hammer 2.

[0037] The pushing assembly 5 includes a rotating shaft 51, a connecting rod 52, a mounting shaft 53 and a knocking rod 54. The rotating shaft 51 is rotatably arranged in the middle of the sieve plate 1. Avoidance grooves 55 are provided on the front and rear sides of the bottom of the sieve plate 1. One end of the connecting rod 52 is connected to the rotating shaft 51, and the other end extends from the avoidance groove 55 to the mounting shaft 53 and is fixedly connected to the mounting shaft 53. The mounting shaft 53 extends from one end to the other end of the sieve hole 11. There are multiple knocking rods 54 and they are evenly distributed on the mounting shaft 53. When the rotating shaft 51 is pushed and rotated, the connecting rod 52 is driven to rotate, and then the mounting shaft 53 and the knocking rod 54 are driven to rotate. In the initial state, the knocking rod 54 is located on the side of the screen plate 1 away from the breaker hammer 2, and the knocking rod 54 will not affect the material falling from the screen hole 11. When the knocking rod 54 rotates a certain angle, the knocking rod 54 rotates from the side of the screen plate 1 away from the breaker hammer 2 to the screen hole 11. At this time, if the material is stuck between the movable plate 3 and the screen plate 1, the knocking rod 54 pushes the material out from between the movable plate 3 and the screen plate 1 and moves toward the breaker hammer 2. When the breaker hammer 2 rotates, the material is crushed. The avoidance grooves 55 are opened on the front and rear sides of the screen plate 1, which can avoid the material from getting stuck in the avoidance grooves 55 when it falls from the sieve hole 11 as much as possible.

[0038] Specifically, the rotation angle of the connecting rod 52 is between 30-45 degrees; in the initial state, the connecting rod 52 is parallel to the length direction of the breaker 2, and the knocking rod 54 is arranged upward from right to left. When the connecting rod 52 rotates a certain angle, the end of the knocking rod 54 extends into the sieve hole 11 for a distance and then pushes the material in the sieve hole 11 upward.

[0039] When knocking the material, if the hardness of the material is relatively high and it is difficult to crush the material by knocking the knocking rod 54, the knocking rod 54 is used to push the material into the crushing space. In other embodiments of the present invention, if the crushed material is a material with lower hardness such as limestone, the end of the knocking rod 54 is conical. The knocking rod 54 with a conical end can directly crush the material when it is rotated into the sieve hole 11. When the knocking rod 54 is rotated into the sieve hole 11, the material is directly crushed by the knocking rod 54, so that the crushed material falls from the sieve hole 11.

[0040] The movable part 7 is a sliding sleeve, and a sliding block 71 is fixedly provided on the outer periphery of the rotating shaft 51. A limiting groove 72 is provided on the inner wall of the sliding sleeve. The sliding block 71 is slidably set in the limiting groove 72 so that the sliding sleeve can be slid on the rotating shaft 51 in the front-back direction and limit the relative rotation between the sliding sleeve and the rotating shaft 51.

[0041] The reset member 8 is a torsion spring, which is sleeved on the outer periphery of the front end of the rotating shaft 51. One end of the torsion spring is connected to the movable part 7, and the other end is connected to the screen plate 1. When the sliding sleeve slides forward, the torsion spring is stretched, and when the sliding sleeve rotates, the torsion spring is twisted. By setting the torsion spring, the sliding sleeve can be reset after sliding forward, and the sliding sleeve can be reset after rotating a certain angle.

[0042] The driving member 9 includes a protrusion 91 fixedly arranged on the movable part 7 and a pushing rod 92 fixedly arranged on the rotation center of the breaker 2. The protrusion 91 is located on the left side of the line between the center of the rotating shaft 51 and the rotation center of the breaker 2; when the movable part 7 moves forward for a certain distance, the pushing rod 92 can contact with the protrusion 91 and push the movable part 7 to rotate when following the breaker 2. There is a certain distance between the end of the pushing rod 92 and the outer periphery of the movable part 7. When the protrusion 91 follows the movable part 7 to rotate a certain angle, the pushing rod 92 disengages from the protrusion 91, and then the movable part 7 is reset under the action of the torsion spring. The rotation angle of the protrusion 91 is the same as the rotation angle of the connecting rod 52.

[0043] In other embodiments of the present invention, the driving member 9 includes a gear 93 fixedly provided on the movable part 7 and a connecting rod fixedly provided on the rotation center of the breaker 2, and an arc-shaped rack 94 is fixedly provided on the end of the connecting rod, and the arc-shaped rack 94 is engaged with the gear 93; when the connecting rod rotates following the breaker 2, the arc-shaped rack 94 is engaged with the gear 93, and the gear 93 is driven to rotate by the arc-shaped rack 94. The length of the arc-shaped rack 94 causes the gear 93 to rotate by a certain angle, which is the same as the angle of rotation of the connecting rod 52.

[0044] The connecting member 6 includes a connecting block 61 fixedly arranged at the front end of the movable plate 3, and a slope 62 slanting downward from front to back is provided at the bottom of the connecting block 61, and a protrusion 63 abutting against the slope 62 is fixedly provided on the sliding sleeve; when the movable plate 3 slides toward the bottom of the sieve hole 11, it drives the connecting block 61 to move and the connecting block 61 pushes the protrusion 63 to move toward the front of the sieve plate 1, and when the protrusion 63 moves a certain distance, the driving member 9 can rotate the sliding sleeve, thereby rotating the rotating shaft 51.

[0045] The frame 10 is also provided with a crushing plate 15, which is located on both sides of the screen plate 1. The screen plate 1 is arranged in an arc shape of about 60 degrees on the frame 10. When the material enters the crusher, it is crushed by the breaker 2 and pushes the stones to hit the crushing plate 15 for crushing. The uncrushed stones enter between the screen plates 1 and are sheared and crushed by the shear force formed between the breaker hammer 2 and the screen plate 1.

[0046] Working principle of the present invention:

[0047] When the material is crushed, the material is put into the crusher. When the material falls between the screen plates 1, the shear force formed between the breaker hammer 2 and the screen plate 1 crushes the stone, so that the crushed stone falls from the sieve hole 11 formed between the sieve plates 1. Some of the material will be stuck between the movable plate 3 and the sieve plate 1 when falling and is difficult to fall. When other materials continue to fall, the new material is pushed by the breaker hammer 2 to squeeze the material stuck between the movable plate 3 and the sieve plate 1 to continue to move downward, and the material is crushed by the friction teeth 4 provided on the opposite surface of the movable plate 3 and the sieve plate 1, and then the material falls; when the movable plate 3 moves to the bottom of the sieve hole 11 and still cannot crush the material, the movable plate 3 moves downward to make the connecting member 6 push the movable part 7 to slide forward, and at this time the driving member 9 can The movable part 7 is pushed to rotate and the pushing component 5 is operated. The rotating shaft 51 on the pushing component 5 is pushed to rotate a certain angle and then drives the knocking rod 54 to rotate from the bottom of the screen plate 1 to the screen hole 11. The knocking rod 54 pushes the material stuck between the movable plate 3 and the screen plate 1 toward the direction of the breaker 2, so that the material re-enters the crushing space for crushing. After the material moves out from between the movable plate 3 and the screen plate 1, the movable plate 3 is quickly reset under the action of the spring 12 and pushes the newly entered material between the screen holes 11 to move toward the center of the crushing space. The pushing component 5 and the movable part 7 are reset under the action of the reset part 8. When the material is stuck between the movable plate 3 and the screen hole 11 again, the above process is repeated. Even if the screen plate 1 is thicker, the material can be prevented from being stuck in the screen hole 11.

[0048] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A crusher comprising a frame (10), a screen plate (1), and a crushing hammer (2), characterized in that: A plurality of screen plates (1) are provided and are evenly distributed in an arc shape at the bottom of the frame (10), and a screen hole (11) is formed between two adjacent screen plates (1). A movable plate (3) is elastically slidably provided on the left side wall of the screen hole (11) along the length direction of the breaker hammer (2), and friction teeth (4) are provided on the surface of the movable plate (3) opposite to the screen plate (1) so that the movable plate (3) can crush the material when it moves away from the rotation center of the breaker hammer (2); A pushing assembly (5) for separating the material from the sieve hole is rotatably provided on each sieve plate (1), a movable portion (7) is provided on the front side of the pushing assembly (5) for sliding forward and backward, a reset member (8) is installed between the movable portion (7) and the sieve plate (1), a driving member (9) is installed between the movable portion (7) and the rotation center of the breaker hammer (2), and a connecting member (6) is installed between the movable plate (3) and the movable portion (7) so that when the movable plate (3) moves away from the rotation center of the breaker hammer (2), the movable portion (7) moves forward, and after the movable portion (7) moves forward for a distance, when the breaker hammer (2) rotates, the driving member (9) rotates the movable portion (7) and thereby rotates the pushing end of the pushing assembly (5) from the bottom of the sieve plate (1) into the sieve hole (11).

2. The crusher according to claim 1, characterized in that Springs (12) are provided on both the front and rear sides of the movable plate (3), one end of the spring (12) is connected to the movable plate (3), and the other end is connected to the frame (10). A plurality of slide grooves (13) are provided below the sieve plate (1) on the left side of the sieve hole (11), and a sliding rod (14) connected to the movable plate (3) is slidably provided in the slide groove (13).

3. The crusher according to claim 1, characterized in that The pushing assembly (5) comprises a rotating shaft (51), a connecting rod (52), a mounting shaft (53) and a knocking rod (54). The rotating shaft (51) is rotatably arranged in the middle of the sieve plate (1). Avoidance grooves (55) are provided on the front and rear sides of the bottom of the sieve plate (1). One end of the connecting rod (52) is connected to the rotating shaft (51), and the other end extends from the avoidance groove (55) to the mounting shaft (53) and is fixedly connected to the mounting shaft (53). The mounting shaft (53) extends from one end to the other end of the sieve hole (11). A plurality of knocking rods (54) are provided and are evenly distributed on the mounting shaft (53).

4. The crusher according to claim 3, characterized in that The end of the knocking rod (54) is conical, and when the knocking rod (54) rotates into the sieve hole (11), the material is directly crushed by the knocking rod (54), so that the crushed material falls from the sieve hole (11).

5. The crusher according to claim 3, characterized in that The movable portion (7) is a sliding sleeve. A sliding block (71) is fixedly provided on the outer periphery of the rotating shaft (51). A limiting groove (72) is provided on the inner wall of the sliding sleeve. The sliding block (71) is slidably provided in the limiting groove (72) so that the sliding sleeve slides on the rotating shaft (51) in the front-rear direction and limits the relative rotation between the sliding sleeve and the rotating shaft (51).

6. The crusher according to claim 3, characterized in that The reset member (8) is a torsion spring, which is sleeved on the outer periphery of the front end of the rotating shaft (51), one end of the torsion spring is connected to the movable part (7), and the other end is connected to the screen plate (1).

7. The crusher according to claim 1, characterized in that The driving member (9) comprises a protrusion (91) fixedly arranged on the movable part (7) and a push rod (92) fixedly arranged on the rotation center of the breaker hammer (2), wherein the protrusion (91) is located on the left side of the line connecting the center of the rotating shaft (51) and the rotation center of the breaker hammer (2).

8. The crusher according to claim 1, characterized in that The driving member (9) comprises a gear (93) fixedly arranged on the movable part (7) and a connecting rod fixedly arranged on the rotation center of the breaker hammer (2); an arc-shaped rack (94) is fixedly arranged at the end of the connecting rod, and the arc-shaped rack (94) is meshed with the gear (93).

9. The crusher according to claim 1, characterized in that The connecting member (6) comprises a connecting block (61) fixedly arranged at the front end of the movable plate (3); a slant (62) slanting downward from front to back is provided at the bottom of the connecting block (61); and a protrusion (63) abutting against the slant (62) is fixedly provided on the sliding sleeve.

10. The crusher according to claim 3, characterized in that The connecting rod (52) rotates at an angle between 30 and 45 degrees, so that the end of the knocking rod (54) extends into the sieve hole (11) for a certain distance, thereby pushing the material in the sieve hole (11) upward.

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