Stone jaw crusher for machine-made sand preparation

Abstract

The invention relates to the technical field of crushers, and provides a stone jaw crusher for machine-made sand preparation, which comprises a bottom frame, a fixed frame fixedly mounted on the bottom frame, a top shell detachably mounted at the top of the fixed frame, a fixed jaw frame, a fixed jaw plate, a movable jaw assembly, a feeding hopper, a crushing limiting assembly, an angle adjusting assembly and a negative pressure dust removal assembly, the fixed jaw frame is fixedly installed in the fixed rack, the fixed jaw plate is obliquely and fixedly installed on the fixed jaw frame, the movable jaw assembly is installed on the fixed rack, the feeding hopper is fixedly installed on the top shell and located on the upper portion of the fixed jaw plate, the crushing limiting assembly is installed in the fixed rack, and the angle adjusting assembly is installed in the crushing limiting assembly. By means of the technical scheme, the problems that in the prior art, due to the fact that stone is too large in size or irregular in shape, a movable jaw is prone to being clamped in the crushing process, equipment is blocked, and jaw pieces deform and break are solved.

Description

Technical Field

[0001] The invention relates to the technical field of crushers, and in particular to a stone jaw crusher for preparing machine-made sand. Background Art

[0002] Artificial sand refers to sand processed by sand making machines and other ancillary equipment. The finished product is more regular and can be processed into sand of different rules and sizes according to different process requirements, which can better meet daily needs. Artificial sand requires professional equipment to produce qualified and applicable sand and gravel. At present, jaw crushers are commonly used to process sand. Jaw crushers are mainly used for medium-sized crushing of various ores and large materials. They are widely used in mining, smelting, building materials, roads, railways, water conservancy and chemical industries.

[0003] During the stone crushing process of the jaw crusher, if the stone is too large or irregular in shape, it is very likely to get stuck in the moving jaw of the jaw crusher. Alternatively, the gap between the moving jaws is too large or the angle is inappropriate, which may cause the stone to get stuck in the moving jaw. If the stone is stuck in the moving jaw of the jaw crusher, it will have a serious impact on the equipment and work. First, it will cause internal blockage of the jaw crusher, making it difficult for the machine to operate normally, resulting in large vibrations, which seriously affect production efficiency. In addition, the stone will also impact the moving jaw, causing deformation and breakage of the jaw piece, and may even cause damage to the entire equipment. Summary of the invention

[0004] The present invention provides a stone jaw crusher for preparing machine-made sand, which solves the problem in the related art that the movable jaw is easily stuck during crushing due to the stone being too large in volume or irregular in shape, resulting in equipment blockage, and causing the jaw to deform and break.

[0005] The technical solution of the present invention is as follows: A stone jaw crusher for preparing machine-made sand, comprising a base frame, a fixed frame fixedly mounted on the base frame, a top shell detachably mounted on the top of the fixed frame, and further comprising: A fixed jaw frame, the fixed jaw frame is fixedly installed inside the fixed frame; A fixed jaw plate, the fixed jaw plate is tilted and fixedly mounted on the fixed jaw frame; A movable jaw assembly, which is mounted on the fixed frame and is used to cooperate with the fixed jaw plate to crush stones; An upper hopper, the upper hopper is fixedly mounted on the top shell, and the upper hopper is located on the upper part of the fixed jaw plate; A crushing limit assembly, which is installed inside the fixed frame and is used to limit the movement of the movable jaw assembly; An angle adjustment component, which is installed inside the crushing limit assembly and is used to adjust the angle between the movable jaw assembly and the fixed jaw plate; A negative pressure dust removal component is installed on the fixed frame and is used to handle dust generated during the crushing process of stones.

[0006] On the basis of the above scheme, the movable jaw assembly comprises: An eccentric shaft, the eccentric shaft being rotatably mounted on the top of the fixed frame; A movable jaw frame, wherein the movable jaw frame is rotatably mounted on the eccentric shaft; A movable jaw plate, the movable jaw plate being fixedly mounted on the movable jaw frame; A driving unit is installed on the fixed frame and is used to drive the eccentric shaft to rotate.

[0007] On the basis of the above scheme, the driving unit comprises: A first motor, wherein the first motor is fixedly mounted on the fixed frame; A driven pulley, the driven pulley is fixedly mounted on one end of the eccentric shaft; A driving pulley, the output end of the first motor is fixedly mounted with the driving pulley; A transmission belt is provided on a tensioning sleeve between the driving pulley and the driven pulley.

[0008] On the basis of the above scheme, the crushing limit assembly includes: A limiting rack, the limiting rack is tilted and fixedly installed inside the fixed rack; A sliding frame, the sliding frame is slidably mounted inside the limiting frame; a toggle plate, the toggle plate being rotatably mounted on the sliding frame; A top frame, wherein the top frame is fixedly mounted on the bottom of the movable jaw frame, and the top frame abuts against one end of the toggle plate.

[0009] Based on the above solution, the angle adjustment component includes: A wedge block, wherein two wedge blocks are provided, and both of the two wedge blocks are slidably mounted inside the position limiting frame, and the oblique edges of the two wedge blocks are in sliding contact; Wherein, the right-angled side of one of the wedge-shaped blocks abuts against the inner bottom wall of the position limiting frame, and the right-angled side of the other wedge-shaped block abuts against the toggle plate; Slide grooves, two slide grooves are symmetrically arranged on the limit frame; A sliding frame, wherein the sliding frame is slidably mounted inside the two sliding grooves; A top block, the two sliding frames are fixedly mounted with the top block, the top block abuts against the wedge block; A moving part, which is mounted on the fixed frame and is used to drive the two sliding frames to move in opposite directions; A connecting part is installed on the limiting frame and is used to limit the position of the movable jaw frame.

[0010] On the basis of the above scheme, the moving part comprises: Bidirectional screws, the bidirectional screws are arranged on both the upper and lower sides of the position limiting frame, the two bidirectional screws are symmetrically arranged, and the two bidirectional screws are rotatably connected to the inner wall of the fixed frame; First nuts, two first nuts are symmetrically and threadedly arranged on the two bidirectional screws, and the first nuts are fixedly connected to the sliding frame; A driven gear, on one end of each of the two bidirectional screws being fixedly mounted the driven gear; A second motor, the second motor is fixedly mounted on the fixed frame; A driving gear is fixedly mounted on the output end of the second motor, and the driving gear is respectively meshed with the two driven gears.

[0011] On the basis of the above solution, the connecting part comprises: A spring, wherein the spring is fixedly mounted on the limiting frame; A connecting rod, the connecting rod is arranged inside the spring, and one end of the connecting rod is provided with a connecting groove; A connecting hook, the connecting hook is fixedly mounted on the movable jaw frame, and the connecting hook is adapted to the connecting groove; A mounting bracket, the mounting bracket being threadedly mounted on a threaded section on the connecting rod, the mounting bracket being in contact with the spring; A positioning nut is threadedly mounted on a threaded section on the connecting rod, and the positioning nut abuts against the mounting bracket.

[0012] Based on the above scheme, the negative pressure dust removal component includes: A material unloading rack, the material unloading rack is fixedly installed inside the fixed frame, and the material unloading rack is located between the fixed jaw plate and the movable jaw plate; A discharging rack, the discharging rack is fixedly mounted on the base frame and is connected to the lower rack; A dust removal frame, wherein the dust removal frame is fixedly installed inside the fixed frame; A collection box, the collection box is detachably mounted on the bottom of the dust removal frame; A filter, the filter being detachably mounted on the discharge end of the dust removal frame; A blower, wherein the blower is fixedly installed inside the fixed frame, and an input end of the blower is connected to an air inlet of the filter; An exhaust pipe, the exhaust pipe is connected to the air outlet of the blower, and the exhaust pipe is fixedly installed on the fixed frame; A filter unit is installed inside the dust removal frame to collect dust.

[0013] On the basis of the above scheme, the filter unit comprises: An air inlet frame, a plurality of the air inlet frames are fixedly installed at equal distances on the inner side wall of the unloading frame, and the air inlet frames are connected to the dust removal frame; A filter plate, wherein the filter plate is fixedly mounted on each of the plurality of air inlet frames; Partitions, a plurality of partitions are staggered and fixedly installed inside the dust removal frame; A discharge trough, wherein a plurality of the discharge troughs are fixedly installed at equal distances between every two of the partitions, and the discharge end of the discharge trough is located at the upper part of the collection box.

[0014] In addition to the above solutions, it also includes: Flexible rods, a plurality of which are fixedly mounted on the inner top wall of the upper hopper near the discharge end; The inner bottom wall of the upper hopper is provided with a plurality of protrusions at equal distances.

[0015] The working principle and beneficial effects of the present invention are: 1. In the present invention, the position of the connecting rod can be adjusted by rotating the mounting frame in coordination with the adjustment of the movable jaw frame, thereby adjusting the tightness of the spring. The position of the mounting frame can be fixed by setting the positioning nut. In the process of crushing stones, the connecting groove and the connecting hook will slide relative to each other as the movable jaw frame moves. At this time, the spring will also be compressed periodically, so that the toggle plate is always against the top frame, which improves the stability when crushing stones. When crushing stones with higher density, the toggle plate will not be affected by the recoil force generated in the crushing process, resulting in displacement between the toggle plate and the top frame, resulting in poor operation.

[0016] 2. In the present invention, the dust generated by the crushed stone will enter the dust removal frame through the inclined air inlet frame. Due to the setting of the filter plate, the small particles of stone that are crushed can be prevented from entering the air inlet frame, reducing the possibility of the air inlet frame being blocked. Through the setting of the partition, the air entering the dust removal frame carries the dust through multiple partitions in a serpentine shape. When passing through the partition, the air flow rate decreases, the dust falls, and enters the discharge trough. The dust entering the discharge trough is finally collected in the collection box, thereby reducing the dust generated during crushing, reducing the dust adhering to the stone particles, resulting in adhesion and agglomeration between the stones, and increasing the risk of blockage and wear of the stone during the crushing process.

[0017] 3. In the present invention, by setting the flexible rod and the protrusion, when the stone passes through the upper hopper, under the influence of the protrusion, the falling speed of some stones of moderate size can be reduced. When the stone reaches the outlet of the upper hopper, the flexible rod can be set to block the large or irregular stones, reduce the inertia of the stone, reduce the impact of the stone on the movable jaw frame and the fixed jaw frame, and improve the service life of the movable jaw frame and the fixed jaw frame.

[0018] 4. In the present invention, through the cooperation of the crushing limit assembly and the angle adjustment assembly, the position of the movable jaw frame can be adjusted freely and conveniently, and the impact of the stone in the crushing process and the influence on the position of the movable jaw frame are reduced, thereby improving the stability of the crushing and making the volume of the crushed stone more uniform. Through the setting of the negative pressure dust removal assembly, the dust in the crushing process can be disposed of to avoid the adhesion and agglomeration between the stones caused by the dust, thereby reducing the possibility of the stone being stuck inside the equipment during the crushing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of a three-dimensional structure in cross section in the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the fixed jaw plate and the fixed jaw frame in the present invention; Figure 4 It is a schematic diagram of the structure of the movable jaw assembly, the driving part, the crushing limit assembly and the angle adjustment assembly in the present invention; Figure 5 It is a schematic diagram of the structure of the movable jaw assembly, the crushing limit assembly and the angle adjustment assembly in the present invention; Figure 6 It is a cross-sectional structural schematic diagram of the cooperation between the crushing limit assembly and the angle adjustment assembly in the present invention; Figure 7It is a schematic cross-sectional structure diagram of the crushing and limiting assembly in the present invention; Figure 8 is a schematic cross-sectional structural diagram of the angle adjustment assembly in the present invention; Fig. 9 It is a structural schematic diagram of the connecting part in the present invention; Fig.10 It is a schematic cross-sectional structure diagram of the negative pressure dust removal component in the present invention; Fig.11 It is a schematic diagram of the cross-sectional structure of the filter part in the present invention; Fig.12 It is a schematic cross-sectional structure diagram of the cooperation between the air inlet frame and the filter plate in the present invention.

[0021] The numbers in the figure represent: 1, bottom frame; 2, fixed frame; 3, top shell; 4, fixed jaw frame; 5, fixed jaw plate; 6, upper hopper; 7, eccentric shaft; 8, movable jaw frame; 9, movable jaw plate; 10, first motor; 11, driven pulley; 12, driving pulley; 13, transmission belt; 14, limit frame; 15, toggle plate; 16, top frame; 17, wedge block; 18, slideway; 19, sliding frame; 20, top block; 21, bidirectional screw; 22, first nut; 23, Driven gear; 24, second motor; 25, driving gear; 26, spring; 27, connecting rod; 28, connecting groove; 29, connecting hook; 30, mounting frame; 31, positioning nut; 32, unloading rack; 33, discharging rack; 34, dust removal rack; 35, collecting box; 36, filter; 37, blower; 38, exhaust duct; 39, air inlet rack; 40, filter plate; 41, partition; 42, discharge trough; 43, flexible rod; 44, protrusion; 45, sliding rack. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figures 1 to 12As shown, this embodiment proposes a stone jaw crusher for preparing machine-made sand, including a base frame 1, on which a fixed frame 2 is fixedly mounted, and a top shell 3 is detachably mounted on the top of the fixed frame 2, and also includes a fixed jaw frame 4, a fixed jaw plate 5, a movable jaw assembly, an upper hopper 6, a crushing limit assembly, an angle adjustment assembly and a negative pressure dust removal assembly. The fixed jaw frame 4 is fixedly mounted inside the fixed frame 2, the fixed jaw plate 5 is tilted and fixedly mounted on the fixed jaw frame 4, the movable jaw assembly is mounted on the fixed frame 2, and is used to cooperate with the fixed jaw plate 5 to crush the stone. The movable jaw assembly includes an eccentric shaft 7, a movable jaw frame 8, a movable jaw plate 9 and a driving unit. The eccentric shaft 7 is rotatably mounted on the top of the fixed frame 2, the movable jaw frame 8 is rotatably mounted on the eccentric shaft 7, the movable jaw plate 9 is fixedly mounted on the movable jaw frame 8, and the driving unit is mounted on the fixed frame 2, and is used to drive the eccentric shaft 7 to rotate.

[0024] Specifically, when crushing the stone, first adjust the position of the crushing limit assembly through the angle adjustment assembly, so as to adjust the angle between the movable jaw frame 8 and the fixed jaw frame 4, and then start to crush the stone. At this time, pour the stone into the upper hopper 6. After the stone entering the upper hopper 6 enters the fixed frame 2, turn on the drive unit to drive the eccentric shaft 7 to rotate, and the eccentric shaft 7 drives the movable jaw frame 8 to move. The movable jaw frame 8 cooperates with the fixed jaw plate 5 through the setting of the movable jaw plate 9 to crush the stone. The crushed stone will enter the negative pressure dust removal assembly. Through the setting of the negative pressure dust removal assembly, the influence of dust particles generated during the crushing process of the stone on the crushing can be reduced, and then the crushed stone can be discharged.

[0025] The above, such as Figure 4 As shown, the driving part includes a first motor 10, a driven pulley 11, a driving pulley 12 and a transmission belt 13. The first motor 10 is fixedly mounted on the fixed frame 2, the driven pulley 11 is fixedly mounted on one end of the eccentric shaft 7, the driving pulley 12 is fixedly mounted on the output end of the first motor 10, and a transmission belt 13 is provided as a tensioning sleeve between the driving pulley 12 and the driven pulley 11.

[0026] Specifically, when driving the eccentric shaft 7 to rotate, the first motor 10 is started, the first motor 10 drives the driving pulley 12 to rotate, the driving pulley 12 drives the driven pulley 11 to rotate through the transmission belt 13, and the eccentric shaft 7 is driven to rotate through the driven pulley 11, which can drive the movable jaw 9 to move.

[0027] like Figures 4 to 7As shown, the upper hopper 6 is fixedly mounted on the top shell 3, and the upper hopper 6 is located on the upper part of the fixed jaw plate 5. The crushing limit assembly is installed inside the fixed frame 2 to limit the movement of the movable jaw assembly. The crushing limit assembly includes a limit frame 14, a sliding frame 45, a toggle plate 15 and a top frame 16. The limit frame 14 is tilted and fixedly mounted inside the fixed frame 2, the sliding frame 45 is slidably mounted inside the limit frame 14, the toggle plate 15 is rotatably mounted on the sliding frame 45, and the top frame 16 is fixedly mounted on the bottom of the movable jaw frame 8, and the top frame 16 abuts against one end of the toggle plate 15.

[0028] Specifically, when adjusting the angle between the movable jaw 9 and the fixed jaw 5, first adjust the angle of the sliding frame 45 in the limiting frame 14, so that through the setting of the toggle plate 15, the top frame 16 is pushed to move, thereby pushing the movable jaw frame 8 through the top frame 16, and rotating a certain angle with the eccentric shaft 7 as the center, and then fix the relative position between the sliding frame 45 and the limiting frame 14. When the movable jaw frame 8 moves, the end of the toggle plate 15 is always in contact with the top frame 16, and the other end of the toggle plate 15 rotates relative to the sliding frame 45.

[0029] like Figures 6 to 9 As shown, the angle adjustment assembly is installed inside the crushing limit assembly and is used to adjust the angle between the movable jaw assembly and the fixed jaw plate 5. The angle adjustment assembly includes a wedge block 17, a slide groove 18, a sliding frame 19, a top block 20, a moving part and a connecting part. Two wedge blocks 17 are provided, and the two wedge blocks 17 are both slidably installed inside the limit frame 14. The hypotenuses of the two wedge blocks 17 are in sliding contact, wherein the right-angled side of one wedge block 17 abuts against the inner bottom wall of the limit frame 14, and the right-angled side of the other wedge block 17 abuts against the toggle plate 15. Two slide grooves 18 are symmetrically provided on the limit frame 14, and sliding frames 19 are slidably installed inside the two slide grooves 18. Top blocks 20 are fixedly installed on the two sliding frames 19, and the top blocks 20 abut against the wedge blocks 17. The moving part is installed on the fixed frame 2, and is used to drive the two sliding frames 19 to move in the opposite direction. The connecting part is installed on the limit frame 14, and is used to limit the position of the movable jaw frame 8.

[0030] Specifically, when adjusting the relative position between the limit frame 14 and the sliding frame 45, the moving part is started, and the moving part drives the sliding frames 19 on both sides of the limit frame 14 to move. The two sliding frames 19 drive the top block 20 to move along the slide groove 18, and the top block 20 abuts against the wedge block 17, so that the two wedge blocks 17 move relative to each other, thereby pushing the sliding frame 45 to move. When the sliding frame 45 moves to the required position, the moving part is closed, the positions of the two sliding frames 19 are fixed, and the stone crushing can begin. Through the setting of the connecting part, the toggle plate 15 can always be pressed against the top frame 16, thereby improving the stability when crushing the stone.

[0031] The above, such as Figure 8As shown, the moving part includes a bidirectional screw 21, a first nut 22, a driven gear 23, a second motor 24 and a driving gear 25. The upper and lower sides of the limit frame 14 are provided with a bidirectional screw 21, and the two bidirectional screws 21 are symmetrically arranged. The two bidirectional screws 21 are rotatably connected to the inner wall of the fixed frame 2. Two first nuts 22 are symmetrically and threadedly provided on the two bidirectional screws 21. The first nut 22 is fixedly connected to the sliding frame 19. One end of the two bidirectional screws 21 is fixedly installed with a driven gear 23. The second motor 24 is fixedly installed on the fixed frame 2. The output end of the second motor 24 is fixedly installed with a driving gear 25, and the driving gear 25 is respectively meshed with the two driven gears 23.

[0032] Specifically, when adjusting the position between the two wedge blocks 17, the second motor 24 is started, and the second motor 24 drives the driving gear 25 to rotate. The driving gear 25 also drives the two driven gears 23 to rotate, thereby driving the two bidirectional screws 21 to rotate at the same time, and driving the corresponding first nut 22 to move, which can drive the two sliding frames 19 to move in the slide groove 18, thereby adjusting the position of the wedge block 17.

[0033] The above, such as Fig. 9 As shown, the connecting part includes a spring 26, a connecting rod 27, a connecting hook 29, a mounting frame 30 and a positioning nut 31. The spring 26 is fixedly mounted on the limit frame 14, the connecting rod 27 is arranged inside the spring 26, and a connecting groove 28 is opened at one end of the connecting rod 27. A connecting hook 29 is fixedly mounted on the movable jaw frame 8, and the connecting hook 29 is adapted to the connecting groove 28. The mounting frame 30 is threadedly mounted on the threaded section on the connecting rod 27, and the mounting frame 30 abuts against the spring 26. The positioning nut 31 is threadedly mounted on the threaded section on the connecting rod 27, and the positioning nut 31 abuts against the mounting frame 30.

[0034] Specifically, when adjusting the relative position between the sliding frame 45 and the limit frame 14, the angle of the movable jaw frame 8 changes. At this time, in conjunction with the adjustment of the movable jaw frame 8, the mounting frame 30 is screwed to adjust the tightness of the spring 26, and the position of the connecting rod 27 can be adjusted. By setting the positioning nut 31, the position of the mounting frame 30 can be fixed. In the process of crushing stones, the connecting groove 28 and the connecting hook 29 will slide relative to each other as the movable jaw frame 8 moves, and the spring 26 will also be periodically compressed.

[0035] like Figures 10 to 12As shown, the negative pressure dust removal assembly is installed on the fixed frame 2, and is used to handle the dust generated during the crushing process of the stone. The negative pressure dust removal assembly includes a feed rack 32, a discharge rack 33, a dust removal rack 34, a collection box 35, a filter 36, a blower 37, an exhaust pipe 38 and a filter part. The feed rack 32 is fixedly installed inside the fixed frame 2, and the feed rack 32 is located between the fixed jaw plate 5 and the movable jaw plate 9. The discharge rack 33 is fixedly installed on the base frame 1, and the discharge rack 33 is connected to the feed rack 32. The dust removal frame 34 is fixedly installed inside the fixed frame 2, the collecting box 35 is detachably installed at the bottom of the dust removal frame 34, the filter 36 is detachably installed at the discharge end of the dust removal frame 34, the blower 37 is fixedly installed inside the fixed frame 2, the input end of the blower 37 is connected to the air inlet of the filter 36, the exhaust pipe 38 is connected to the air outlet of the blower 37, the exhaust pipe 38 is fixedly installed on the fixed frame 2, and a filter part is installed inside the dust removal frame 34 for collecting dust.

[0036] Specifically, after the crushed stone enters the unloading rack 32, it will go out through the discharging rack 33. A conveying device is arranged at the lower part of the base frame 1 to remove the crushed stone discharged from the discharging rack 33. When the crushed stone passes through the unloading rack 32, the blower 37 is turned on. The blower 37 extracts the air in the dust removal rack 34, so that a negative pressure area is formed on the side of the unloading rack 32 close to the dust removal rack 34. At this time, the dust particles will enter the dust removal rack 34 and finally fall into the collection box 35 for storage. Then the extracted air will pass through the filter 36 and be discharged by the exhaust pipe 38.

[0037] It should be added that reducing the dust generated during stone crushing can reduce the possibility of stones getting stuck between the movable jaw frame 8 and the fixed jaw frame 4. This is because dust is a kind of fine particles generated during the stone crushing process. It has a certain viscosity and fluidity. They are easy to adhere to stone particles, resulting in adhesion and agglomeration between stones, increasing the blockage and wear of stones during the crushing process. Separating and collecting these dusts helps reduce the possibility of stones being stuck between the movable jaw frame 8 and the fixed jaw frame 4 during crushing. It is also of great significance for protecting the environment, ensuring the health of workers and improving crushing efficiency.

[0038] The above, such as Fig.11 As shown, the filtering part includes an air inlet frame 39, a filter plate 40, a partition 41 and a discharge trough 42. A plurality of air inlet frames 39 are fixedly installed at equal distances on the inner wall of the unloading frame 32. The air inlet frame 39 is connected to the dust removal frame 34. Filter plates 40 are fixedly installed on the plurality of air inlet frames 39. A plurality of partitions 41 are staggered and fixedly installed inside the dust removal frame 34. A plurality of discharge troughs 42 are fixedly installed at equal distances between every two partitions 41. The discharge end of the discharge trough 42 is located at the upper part of the collecting box 35.

[0039] Specifically, the dust generated by the crushed stone will enter the dust removal frame 34 through the inclined air inlet frame 39. Due to the setting of the filter plate 40, the small particles of stone that are crushed can be prevented from entering the air inlet frame 39, reducing the possibility of the air inlet frame 39 being blocked. Through the setting of the partition 41, the air entering the dust removal frame 34 carries the dust through multiple partitions 41 in a serpentine shape. When passing through the partition 41, the air flow rate decreases, the dust falls, and enters the discharge trough 42. The dust entering the discharge trough 42 eventually enters the collection box 35, and the collection box 35 can be cleaned regularly.

[0040] The above also includes flexible rods 43 and protrusions 44. A plurality of flexible rods 43 are fixedly installed on the inner top wall of the upper hopper 6 near the discharge end, and a plurality of protrusions 44 are opened at equal distances on the inner bottom wall of the upper hopper 6.

[0041] Specifically, through the setting of the flexible rod 43 and the protrusion 44, when the stone passes through the upper hopper 6, under the influence of the protrusion 44, the falling speed of some stones of moderate size can be reduced. When the stone reaches the outlet of the upper hopper 6, through the setting of the flexible rod 43, the large or irregular stone can be blocked, the inertia of the stone can be reduced, the impact of the stone on the movable jaw frame 8 and the fixed jaw frame 4 can be reduced, and the service life of the movable jaw frame 8 and the fixed jaw frame 8 is improved.

[0042] To sum up, when crushing the stone, first adjust the angle between the movable jaw frame 8 and the fixed jaw frame 4, then start the second motor 24, the second motor 24 drives the active gear 25 to rotate, and the active gear 25 drives the two driven gears 23 to rotate at the same time, thereby driving the two bidirectional screws 21 to rotate at the same time, driving the corresponding first nut 22 to move, and the two sliding frames 19 can be driven to move in the slide groove 18, and the sliding frame 19 drives the top block 20 to move along the slide groove 18, and the top block 20 abuts against the wedge block 17, so that the two wedge blocks 17 move relative to each other, thereby pushing the sliding frame 45 to move, and through the setting of the toggle plate 15, the top frame 16 is pushed to move, thereby pushing the movable jaw frame 8 through the top frame 16, and rotating a certain angle with the eccentric shaft 7 as the center of the circle, when the sliding frame 45 moves to the required position, turn off the second motor 24, fix the position of the two sliding frames 19, thereby adjusting the angle of the movable jaw frame 8.

[0043] When adjusting the relative position between the sliding frame 45 and the limiting frame 14, the angle of the movable jaw frame 8 changes. At this time, in coordination with the adjustment of the movable jaw frame 8, the mounting frame 30 is screwed to adjust the tightness of the spring 26, and the position of the connecting rod 27 can be adjusted. By setting the positioning nut 31, the position of the mounting frame 30 can be fixed.

[0044] Then, the stone can be crushed. At this time, the first motor 10 is started. The first motor 10 drives the active pulley 12 to rotate. The active pulley 12 drives the driven pulley 11 to rotate through the transmission belt 13, so that the eccentric shaft 7 is driven to rotate through the driven pulley 11, which can drive the movable jaw frame 8 to move. The movable jaw frame 8 cooperates with the fixed jaw plate 5 through the setting of the movable jaw plate 9 to crush the stone entering the fixed frame 2. When the movable jaw frame 8 moves, the end of the toggle plate 15 is always in contact with the top frame 16, and the other end of the toggle plate 15 rotates relative to the sliding frame 45. At the same time, the connecting groove 28 and the connecting hook 29 will slide relative to each other with the movement of the movable jaw frame 8, and the spring 26 will also be periodically compressed at this time.

[0045] At this time, pour the stones into the upper hopper 6. When the stones pass through the upper hopper 6, under the influence of the protrusion 44, the falling speed of some stones of moderate size can be reduced. When the stones reach the outlet of the upper hopper 6, the flexible rod 43 can be set to block the larger or irregular stones, reduce the inertia of the stones, reduce the impact of the stones on the movable jaw frame 8 and the fixed jaw frame 4, and increase the service life of the movable jaw frame 8 and the fixed jaw frame 8.

[0046] When the crushed stone enters the unloading rack 32, it will go out through the discharging rack 33. A conveying device is set at the lower part of the bottom frame 1 to remove the crushed stone discharged by the discharging rack 33. When the crushed stone passes through the unloading rack 32, the blower 37 is turned on. The blower 37 extracts the air in the dust removal rack 34, so that a negative pressure area is formed on the side of the unloading rack 32 close to the dust removal rack 34. At this time, the dust generated by the crushed stone will enter the dust removal rack 34 through the inclined air inlet rack 39. Due to the setting of the filter plate 40, In order to prevent the small particles of stone from being crushed into the air inlet frame 39 and reduce the possibility of the air inlet frame 39 being blocked, the air entering the dust removal frame 34 carries the dust through multiple partitions 41 in a serpentine shape through the partitions 41. When passing through the partitions 41, the air flow rate decreases, the dust falls, and enters the discharge trough 42. The dust entering the discharge trough 42 eventually enters the collection box 35. The collection box 35 can be cleaned regularly, and then the extracted air will pass through the filter 36 and be discharged by the exhaust pipe 38.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stone jaw crusher for preparing machine-made sand, comprising a base frame (1), a fixed frame (2) fixedly mounted on the base frame (1), a top shell (3) detachably mounted on the top of the fixed frame (2), characterized in that: Also includes: A fixed jaw frame (4), the fixed jaw frame (4) being fixedly mounted inside the fixed frame (2); A fixed jaw plate (5), the fixed jaw plate (5) being tilted and fixedly mounted on the fixed jaw frame (4); A movable jaw assembly, the movable jaw assembly being mounted on the fixed frame (2) and being used to cooperate with the fixed jaw plate (5) to crush stones; An upper hopper (6), the upper hopper (6) being fixedly mounted on the top shell (3), the upper hopper (6) being located above the fixed jaw plate (5); A crushing limit assembly, the crushing limit assembly being installed inside the fixed frame (2) and used to limit the movement of the movable jaw assembly; An angle adjustment component, the angle adjustment component is installed inside the crushing limit assembly and is used to adjust the angle between the movable jaw assembly and the fixed jaw plate (5); A negative pressure dust removal component is installed on the fixed frame (2) and is used to process dust generated during the crushing process of stones.

2. The stone jaw crusher for preparing machine-made sand according to claim 1, characterized in that: The movable jaw assembly comprises: An eccentric shaft (7), the eccentric shaft (7) being rotatably mounted on the top of the fixed frame (2); A movable jaw frame (8), wherein the movable jaw frame (8) is rotatably mounted on the eccentric shaft (7); A movable jaw plate (9), the movable jaw plate (9) being fixedly mounted on the movable jaw frame (8); A driving unit, the driving unit is mounted on the fixed frame (2) and is used to drive the eccentric shaft (7) to rotate.

3. The stone jaw crusher for preparing machine-made sand according to claim 2, characterized in that: The driving unit comprises: A first motor (10), the first motor (10) being fixedly mounted on the fixed frame (2); A driven pulley (11), the driven pulley (11) being fixedly mounted on one end of the eccentric shaft (7); A driving pulley (12), the output end of the first motor (10) being fixedly mounted with the driving pulley (12); A transmission belt (13), wherein the transmission belt (13) is provided on a tensioning sleeve between the driving pulley (12) and the driven pulley (11).

4. The stone jaw crusher for preparing machine-made sand according to claim 3, characterized in that: The crushing limit assembly comprises: A limiting frame (14), the limiting frame (14) being tilted and fixedly mounted inside the fixed frame (2); A sliding frame (45), the sliding frame (45) being slidably mounted inside the position limiting frame (14); a toggle plate (15), the toggle plate (15) being rotatably mounted on the sliding frame (45); A top frame (16), wherein the top frame (16) is fixedly mounted on the bottom of the movable jaw frame (8), and the top frame (16) abuts against one end of the toggle plate (15).

5. The stone jaw crusher for preparing machine-made sand according to claim 4, characterized in that: The angle adjustment component comprises: A wedge block (17), wherein two wedge blocks (17) are provided, and both of the two wedge blocks (17) are slidably mounted inside the position limiting frame (14), and the oblique edges of the two wedge blocks (17) are in sliding contact; The right-angled side of one of the wedge-shaped blocks (17) abuts against the inner bottom wall of the position limiting frame (14), and the right-angled side of the other wedge-shaped block (17) abuts against the sliding frame (45); A slide groove (18), wherein two slide grooves (18) are symmetrically provided on the position limiting frame (14); A sliding frame (19), wherein the sliding frame (19) is slidably mounted inside the two sliding grooves (18); A top block (20), the top block (20) being fixedly mounted on each of the two sliding frames (19), the top block (20) being in contact with the wedge block (17); A moving part, the moving part is mounted on the fixed frame (2) and is used to drive the two sliding frames (19) to move in opposite directions; A connecting portion, the connecting portion being mounted on the position limiting frame (14) and being used to limit the position of the movable jaw frame (8).

6. The stone jaw crusher for preparing machine-made sand according to claim 5, characterized in that: The mobile unit comprises: A bidirectional screw rod (21), wherein the bidirectional screw rod (21) is disposed on both upper and lower sides of the position limiting frame (14), the two bidirectional screw rods (21) are symmetrically arranged, and the two bidirectional screw rods (21) are rotatably connected to the inner wall of the fixed frame (2); A first nut (22), wherein two first nuts (22) are symmetrically and threadedly arranged on the two bidirectional screw rods (21), and the first nuts (22) are fixedly connected to the sliding frame (19); A driven gear (23), one end of each of the two bidirectional screw rods (21) being fixedly mounted with the driven gear (23); a second motor (24), the second motor (24) being fixedly mounted on the fixed frame (2); A driving gear (25), the output end of the second motor (24) is fixedly mounted with the driving gear (25), and the driving gear (25) is respectively meshed with the two driven gears (23).

7. The stone jaw crusher for preparing machine-made sand according to claim 6, characterized in that: The connecting portion comprises: A spring (26), wherein the spring (26) is fixedly mounted on the limiting frame (14); A connecting rod (27), the connecting rod (27) being arranged inside the spring (26), and a connecting groove (28) being formed at one end of the connecting rod (27); A connecting hook (29), the connecting hook (29) being fixedly mounted on the movable jaw frame (8), the connecting hook (29) being adapted to fit the connecting groove (28); a mounting frame (30), the mounting frame (30) being threadedly mounted on a threaded section on the connecting rod (27), the mounting frame (30) being in contact with the spring (26); A positioning nut (31), wherein the positioning nut (31) is threadedly mounted on a threaded section on the connecting rod (27), and the positioning nut (31) abuts against the mounting frame (30).

8. The stone jaw crusher for preparing machine-made sand according to claim 7, characterized in that: The negative pressure dust removal component comprises: A material unloading rack (32), the material unloading rack (32) being fixedly mounted inside the fixed frame (2), the material unloading rack (32) being located between the fixed jaw plate (5) and the movable jaw plate (9); A discharging rack (33), the discharging rack (33) being fixedly mounted on the base frame (1), the discharging rack (33) being in communication with the unloading rack (32); A dust removal frame (34), the dust removal frame (34) being fixedly mounted inside the fixed frame (2); A collection box (35), the collection box (35) being detachably mounted on the bottom of the dust removal frame (34); A filter (36), wherein the filter (36) is detachably mounted on a discharge end of the dust removal frame (34); a blower (37), the blower (37) being fixedly mounted inside the fixed frame (2), the input end of the blower (37) being in communication with the air inlet of the filter (36); an exhaust pipe (38), the exhaust pipe (38) being connected to an air outlet of the blower (37), and the exhaust pipe (38) being fixedly mounted on the fixed frame (2); A filter unit is installed inside the dust removal frame (34) and is used to collect dust.

9. The stone jaw crusher for preparing machine-made sand according to claim 8, characterized in that: The filter unit comprises: An air inlet frame (39), a plurality of the air inlet frames (39) being fixedly mounted at equal distances on the inner side wall of the unloading frame (32), and the air inlet frames (39) being connected to the dust removal frame (34); A filter plate (40), each of the plurality of air inlet frames (39) being fixedly mounted with the filter plate (40); Partition plates (41), a plurality of partition plates (41) being staggered and fixedly mounted inside the dust removal frame (34); A discharge trough (42), wherein a plurality of the discharge troughs (42) are fixedly installed at equal distances between every two of the partitions (41), and the discharge ends of the discharge troughs (42) are located on the upper part of the collection box (35).

10. The stone jaw crusher for preparing machine-made sand according to claim 9, characterized in that: Also includes: Flexible rods (43), a plurality of the flexible rods (43) being fixedly mounted on the inner top wall of the upper hopper (6) at a position close to the discharge end; A plurality of protrusions (44) are provided on the inner bottom wall of the upper hopper (6) at equal distances.

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