A high-efficiency crushing device for mining

Abstract

The application relates to the technical field of crushing devices, in particular to a high-efficiency crushing device for mining, which comprises a shell, a crushing chamber is arranged in the shell, a first lining plate is fixedly installed on the inner wall of the crushing chamber, a rotating shaft driven by an independent power source is rotationally connected in the crushing chamber, a first eccentric wheel and a second eccentric wheel are fixedly installed on the rotating shaft, an e-plate is rotationally sleeved on the outer wall of the first eccentric wheel, and a second lining plate is slidably connected to the outer wall of the side of the e-plate close to the first lining plate; the e-plate is driven by the first eccentric wheel to reciprocating swing, the second eccentric wheel drives the second lining plate to make inclined sliding along the limiting groove relative to the e-plate, the crushing cavity forms an upper large opening and a lower small opening, the upper large opening is convenient for biting into the ore, and the lower small opening strengthens the extrusion crushing, so that the problem that the upper and lower materials are not uniformly crushed and the extrusion stroke is insufficient in the traditional crusher is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of crushing equipment technology, and in particular to a high-efficiency crushing equipment for mining. Background Technology

[0002] In mining operations, the crushing process is the core link connecting ore mining and subsequent processing. Jaw crushers, with their advantages of simple structure and strong compressive strength adaptability, are widely used in coarse and medium crushing operations of various ores. They are an indispensable key equipment in mining production lines. Their core working principle is a curved extrusion type. Through the periodic opening and closing of the moving jaw and the fixed jaw, the ore is crushed by the extrusion action of the liner and the jaw plate. Among them, the liner is a vulnerable part that directly contacts the material. The fitting accuracy between the liner and the jaw plate directly determines the crushing efficiency and the particle size quality of the finished product. However, existing jaw crushers generally suffer from a design flaw where the liner and jaw plate are relatively fixed in position. The liner is fixed to the jaw plate with bolts and wedges, making it impossible to adapt to the material distribution in the crushing chamber. Due to the uneven particle size of the ore feed, the upper layer of material can be fully squeezed by the passive and fixed jaws during the crushing process, while the lower layer of material is restricted by the fixed structure, which easily leads to insufficient squeezing stroke and uneven force, resulting in insufficient crushing. The finished product contains too many coarse particles and has uneven particle size, which not only reduces crushing efficiency but also requires subsequent secondary crushing, increasing the energy consumption and cost of mining operations. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and propose a high-efficiency crushing device for mining. This invention utilizes a second liner plate, which, when the jaw plate reciprocates, causes a second eccentric wheel to drive the second liner plate to slide relative to the jaw plate. When the second liner plate slides obliquely downwards relative to the jaw plate, it reduces the space between the bottom of the jaw plate and the first liner plate, thereby enhancing the crushing effect of the lower ore layer. Conversely, when the second eccentric wheel drives the second liner plate to slide obliquely upwards relative to the jaw plate, it increases the space between the top of the jaw plate and the first liner plate, thereby increasing the biting effect of the upper ore layer. This reciprocating motion achieves a large biting effect on the upper ore layer and a strong clamping effect on the lower ore layer, avoiding the problems of insufficient compression stroke and uneven force distribution that are common in existing technologies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A high-efficiency crushing device for mining includes a shell, a crushing chamber inside the shell, a first liner fixedly installed on the inner wall of the crushing chamber, and a rotating shaft driven by an independent power source rotatably connected inside the crushing chamber. A first eccentric wheel and a second eccentric wheel are fixedly installed on the rotating shaft. The eccentric directions of the first eccentric wheel and the second eccentric wheel are the same, and the eccentricity of the second eccentric wheel is greater than that of the first eccentric wheel. A jaw plate is rotatably mounted on the outer wall of the first eccentric wheel, and a connecting rod is rotatably connected to the outer wall of the jaw plate. The end of the connecting rod away from the jaw plate is rotatably connected to the inner wall of the crushing chamber. A second liner is slidably connected to the outer wall of the jaw plate near the first liner. A bracket is provided on the top outer wall of the second liner. A connecting sleeve is rotatably sleeved on the outer wall of the second eccentric wheel. The bracket is rotatably connected to the outer wall of the connecting sleeve. The bottom inner wall of the crushing chamber is provided with a discharge port, and the second liner is provided with a dredging component; The housing is equipped with a conveyor belt extending to the top of the crushing chamber and a transmission assembly for driving the conveyor belt. An inclined sieve plate is slidably connected to the top inner wall of the crushing chamber. The housing is also equipped with a vibration assembly for driving the sieve plate to vibrate.

[0005] This solution achieves integrated operation of crushing, feeding, screening, and anti-clogging through the overall coordination of the shell, crushing chamber, first liner, jaw plate, double eccentric wheel, second liner, unblocking component, conveyor belt, screen plate, and corresponding transmission and vibration mechanism. It creates a dynamic crushing effect in the crushing chamber with large upper biting and strong lower clamping, solving the problems of uneven force on the upper and lower layers of ore, insufficient crushing, easy clogging, and low efficiency in traditional jaw crushers. It significantly improves the uniformity of ore crushing and the overall working stability of the device.

[0006] Preferably, the power source is provided by a gearbox and a motor disposed on the outer wall of the housing 1. The input end of the gearbox is fixedly connected to the main shaft of the motor, and the output end of the gearbox is fixedly connected to a rotating shaft shared by the first eccentric wheel and the second eccentric wheel.

[0007] This solution provides a stable and adjustable power input to the device through a motor and a gearbox, and can adjust the output speed according to the type of ore and crushing requirements, ensuring smooth operation of the eccentric wheel and efficient power transmission, thus providing reliable power support for the crushing mechanism.

[0008] Preferably, the unblocking assembly includes an unblocking rod, which is rotatably connected to the outer wall of the second liner and extends into the discharge port. The unblocking rod is a T-shaped component.

[0009] This solution uses a T-shaped unblocking rod that is linked to the second liner. During the crushing process, the rod moves synchronously with the second liner and continuously acts on the discharge port, which can effectively prevent ore from bridging and blocking at the discharge port and achieve automatic unblocking.

[0010] Preferably, a limiting groove is formed on the outer wall of the jaw plate, and a limiting block that is slidably inserted into the limiting groove is provided on the outer wall of the second liner.

[0011] This solution uses the sliding cooperation between the limiting groove and the limiting block to precisely constrain the movement direction of the second liner, ensuring that it can only slide relative to the jaw plate along the set trajectory, avoiding erratic movement, deviation or falling off, and improving the stability of the crushing movement.

[0012] Preferably, a pair of tensioning wheels are rotatably connected to the inner wall of the housing via a rotating shaft, the conveyor belt is sleeved on the outer wall of the two tensioning wheels, a funnel-shaped feeding port is opened on the outer wall of the housing near the bottom end of the conveyor belt, and several sets of equidistantly linearly distributed polyurethane scrapers are provided on the outer wall of the conveyor belt.

[0013] This solution utilizes the coordination of a tensioning wheel, conveyor belt, scraper, and funnel-shaped feed inlet to achieve continuous, stable, and quantitative ore feeding. This effectively prevents overloading of the crushing chamber and blockage of the discharge outlet caused by excessive or uneven feeding, ensuring smooth feeding and improving the overall operational continuity and reliability of the unit. Preferably, the transmission assembly includes two first gears, which are respectively fixedly mounted on the tension wheel shaft and the common shaft of the first eccentric wheel and the second eccentric wheel. A synchronous belt is fitted on the outer wall of the two first gears through meshing.

[0014] This solution uses a transmission assembly consisting of gears and synchronous belts to synchronously transmit the power of the crushing mechanism to the conveyor belt, realizing coordinated operation of crushing and feeding actions. It has a compact structure, reliable transmission, and eliminates the need for a separate feeding power source, reducing the complexity and energy consumption of the device and improving overall operating efficiency.

[0015] Preferably, the vibration assembly includes an abutment column fixed on the outer wall of the sieve plate, a second gear that meshes with a timing belt is rotatably connected to the outer wall of the housing, and a lever that can contact the abutment column is fixedly installed on the outer wall of the second gear.

[0016] This scheme uses a second gear and a lever to engage with the abutment column on the outer wall of the screen plate, and uses synchronous belt power to drive the screen plate to generate intermittent vibration. This allows the screen plate to effectively pre-screen the ore entering the crushing chamber, quickly separate small particles, avoid excessive crushing of small particles, and reduce the crushing load.

[0017] Preferably, the outer wall of the sieve plate is provided with a sliding column that is slidably inserted into the top outer wall of the housing, the top outer wall of the sliding column is provided with a boss, and a spring is provided between the outer wall of the boss and the outer wall of the housing.

[0018] This solution provides stable vibration guidance and elastic reset capability for the screen plate through sliding columns, bosses and springs, so that the screen plate maintains continuous and stable reciprocating vibration, improves screening effect and reduces impact and noise, while extending the service life of the screen plate and related components, and ensuring long-term stable operation of the screening mechanism.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention, through the setting of a second liner, causes the second eccentric wheel to drive the second liner to slide back and forth relative to the jaw plate when the jaw plate reciprocates. When the second liner slides obliquely downward relative to the jaw plate, it reduces the space between the bottom end of the jaw plate and the first liner, thereby enhancing the crushing effect of the lower layer ore. When the second eccentric wheel drives the second liner to slide obliquely upward relative to the jaw plate, it increases the space between the top end of the jaw plate and the first liner, thereby increasing the biting effect of the upper layer ore. This reciprocating motion achieves a large biting effect on the upper layer ore and a strong clamping effect on the lower layer ore, avoiding the problems of insufficient extrusion stroke and uneven force that are common in existing technologies.

[0020] 2. The present invention, through the anti-blocking component, allows the crushed ore to be discharged directly through the discharge port. During the reciprocating sliding process of the second liner relative to the jaw plate, the second liner drives the unblocking rod to move reciprocally within the discharge port, thereby avoiding bridging or even blockage of the ore within the discharge port, reducing the frequency of maintenance and unblocking of the discharge port, and further improving production efficiency.

[0021] 3. This invention utilizes a vibration assembly that, under the action of a synchronous belt, drives a second gear to rotate a lever. The lever intermittently contacts the abutment post on the screen plate, and in conjunction with a spring, causes the screen plate to vibrate up and down. The ore unloaded from the conveyor belt will preferentially fall onto the screen plate, blocking large ore particles and slowing their descent. Small ore particles will fall directly through the screen holes to the discharge port. Compared to existing technologies that simultaneously feed large and small ore particles into the crushing chamber, this invention prioritizes the discharge of small ore particles, preventing excessive crushing of small ore particles and avoiding them occupying space inside the crushing chamber, thus improving work efficiency. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure proposed in this invention; Figure 2 This is a three-dimensional sectional view of the overall structure proposed in this invention. Figure 1 ; Figure 3 This is a three-dimensional sectional view of the overall structure proposed in this invention. Figure 2 ; Figure 4 This is a three-dimensional schematic diagram of the jaw plate proposed in this invention; Figure 5 This is a three-dimensional sectional view of the jaw plate proposed in this invention; Figure 6 This is a three-dimensional schematic diagram of the vibration component proposed in this invention; Figure 7 This is a three-dimensional schematic diagram of the sieve plate proposed in this invention.

[0023] Legend: 1. Shell; 11. Crushing chamber; 111. First liner; 12. Feed port; 13. Discharge port; 2. Motor; 21. Gearbox; 22. First eccentric wheel; 23. Second eccentric wheel; 3. Jaw plate; 31. Limiting groove; 32. Second liner; 321. Bracket; 322. Connecting sleeve; 323. Limiting block; 33. Connecting rod; 34. Unblocking rod; 4. Conveyor belt; 41. Scraper; 42. Synchronous belt; 43. First gear; 44. Tensioning wheel; 5. Screen plate; 51. Sliding column; 52. Boss; 53. Spring; 54. Second gear; 55. Lever; 56. Abutment column. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] See Figures 1 to 7 As shown, this embodiment of a high-efficiency crushing device for mining includes a housing 1, a crushing chamber 11 is provided inside the housing 1, a first liner 111 is fixedly installed on the inner wall of the crushing chamber 11, and a rotating shaft driven by an independent power source is rotatably connected inside the crushing chamber 11. The power source is provided by a gearbox 21 and a motor 2 provided on the outer wall of the housing 1. The input end of the gearbox 21 is fixedly connected to the main shaft of the motor 2, and the output end of the gearbox 21 is fixedly connected to the rotating shaft. A first eccentric wheel 22 and a second eccentric wheel 23 are fixedly installed on the rotating shaft. The eccentric directions of the first eccentric wheel 22 and the second eccentric wheel 23 are the same, and the eccentricity of the second eccentric wheel 23 is greater than the eccentricity of the first eccentric wheel 22. A jaw plate 3 is rotatably mounted on the outer wall of the first eccentric wheel 22. A connecting rod 33 is rotatably connected to the outer wall of the jaw plate 3. The end of the connecting rod 33 away from the jaw plate 3 is rotatably connected to the inner wall of the crushing chamber 11. A second liner 32 is slidably connected to the outer wall of the jaw plate 3 near the first liner 111. A bracket 321 is provided on the top outer wall of the second liner 32. A connecting sleeve 322 is rotatably mounted on the outer wall of the second eccentric wheel 23. The bracket 321 is rotatably connected to the outer wall of the connecting sleeve 322. A limiting groove 31 is provided on the outer wall of the jaw plate 3. A limiting block 323 is slidably inserted into the limiting groove 31 on the outer wall of the second liner 32. Through the sliding cooperation between the limiting groove and the limiting block, the movement direction of the second liner is precisely constrained to ensure that it can only slide relative to the jaw plate along the set trajectory, avoiding the phenomenon of scrambling, deviation or falling off. The bottom inner wall of the crushing chamber 11 is provided with a discharge port 13. A clearing component is provided on the second liner 32. The clearing component includes a clearing rod 34, which is rotatably connected to the outer wall of the second liner 32. The clearing rod 34 extends into the discharge port 13. The clearing rod 34 is a T-shaped part. Through the T-shaped clearing rod linked with the second liner, it moves synchronously with the second liner during the crushing process and continuously acts on the discharge port, which can effectively prevent the ore from bridging and blocking at the discharge port and realize automatic clearing. The housing 1 is provided with a conveyor belt 4 extending to the top of the crushing chamber 11 and a transmission assembly for driving the conveyor belt 4. The conveyor belt 4 is sleeved on the outer wall of two tensioning wheels 44 that are rotatably connected to the inner wall of the housing 1 via a rotating shaft. A funnel-shaped feeding port 12 is provided on the outer wall of the housing 1 near the bottom of the conveyor belt 4. Several sets of equidistant linearly distributed polyurethane scrapers 41 are provided on the outer wall of the conveyor belt 4. The transmission assembly that drives the conveyor belt 4 includes two first gears 43. The two first gears 43 are respectively fixedly mounted on the shaft of the tension wheel 44 and the common shaft of the first eccentric wheel 22 and the second eccentric wheel 23. The outer walls of the two first gears 43 are fitted with a synchronous belt 42 through meshing teeth. When the first eccentric wheel 22 rotates, it drives the first gear 43 on it to rotate. Under the cooperation of the first gear 43 and the synchronous belt 42, the first gear 43 on the tension wheel 44 drives the tension wheel 44 to rotate. The tension wheel 44 drives the conveyor belt 4 to rotate. Under the action of the scraper 41, the conveyor belt 4 can continuously and quantitatively transport the ore in the feed port 12 to the crushing chamber 11, avoiding the situation where the feed volume is too large and the discharge port 13 is blocked, which helps to improve work efficiency. An inclined screen plate 5 is slidably connected to the inner top wall of the crushing chamber 11. A sliding column 51 is slidably inserted into the outer wall of the shell 1 on the outer wall of the screen plate 5. A boss 52 is provided on the outer top wall of the sliding column 51. A spring 53 is provided between the outer wall of the boss 52 and the outer wall of the shell 1. The housing 1 is also provided with a vibration assembly for driving the screen plate 5 to vibrate. The vibration assembly includes an abutment post 56 fixed on the outer wall of the screen plate 5. A second gear 54 that meshes with the timing belt 42 is rotatably connected to the outer wall of the housing 1. A lever 55 that can contact the abutment post 56 is fixedly installed on the outer wall of the second gear 54.

[0026] It should be noted that, under the action of the synchronous belt 42, the second gear 54 drives the lever 55 to rotate. The lever 55 intermittently contacts the abutment post 56 on the screen plate 5, and in conjunction with the spring 53, causes the screen plate 5 to vibrate up and down. The ore unloaded from the conveyor belt 4 will fall onto the screen plate 5 first. Large particles of ore will be blocked, slowing down the falling process. Small particles of ore will fall directly through the screen holes to the discharge port 13. Compared with the existing feeding method that feeds large and small particles of ore into the crushing chamber 11 at the same time, this invention prioritizes the discharge of small particles of ore, avoiding excessive crushing of small particles of ore, and also avoiding small particles of ore occupying the internal space of the crushing chamber 11, which is conducive to improving work efficiency. In addition, the second gear 54 also acts as a tensioning wheel to assist in tensioning the synchronous belt 42.

[0027] In this embodiment, the ore unloaded from the conveyor belt 4 falls between the first liner plate 111 and the second liner plate 32. The first eccentric wheel 22 and the second eccentric wheel 23 are driven to rotate by the motor 2. Under the action of the connecting rod 33, the jaw plate 3 moves back and forth in the crushing chamber 11 to crush the ore that falls between the first liner plate 111 and the second liner plate 32. The crushed ore is discharged through the discharge port 13.

[0028] Since the eccentric directions of the first eccentric wheel 22 and the second eccentric wheel 23 are the same, and the eccentricity of the second eccentric wheel 23 is greater than that of the first eccentric wheel 22, when the first eccentric wheel 22 drives the jaw plate 3 to move closer to the first liner plate 111, the second eccentric wheel 23 drives the second liner plate 32 to slide obliquely downward through the connecting sleeve 322. The second liner plate 32 slides obliquely downward relative to the jaw plate 3, thereby reducing the space between the bottom end of the jaw plate 3 and the first liner plate 111, thus achieving the effect of strengthening the crushing of the lower layer of ore. When the first eccentric wheel 22 drives the jaw plate 3 away from the jaw plate 3, the eccentric wheel 23 drives the jaw plate 3 to move away from the jaw plate 3. When the first liner 111 is in place, the second eccentric wheel 23 drives the second liner 32 to slide obliquely upward relative to the jaw plate 3, thereby increasing the space between the top of the jaw plate 3 and the first liner 111, achieving the effect of increasing the bite of the upper layer of ore. This process is repeated to achieve the effect of large bite of the upper layer of ore and strong clamping of the lower layer of ore. This avoids the problem in the existing technology where the upper layer of material can be fully squeezed by the passive jaw and the fixed jaw during the crushing process, while the lower layer of material is restricted by the fixed structure, which is prone to insufficient squeezing stroke and uneven force, resulting in insufficient crushing. This improves production efficiency.

[0029] Meanwhile, in this embodiment, the crushed ore is directly discharged through the discharge port 13. During the reciprocating sliding process of the second liner 32 relative to the jaw plate 3, the second liner 32 drives the unblocking rod 34 to reciprocate within the discharge port 13, thereby avoiding bridging or even blockage of the ore within the discharge port 13, reducing the frequency of maintenance and unblocking of the discharge port 13, and further improving production efficiency.

[0030] Working principle: The ore is temporarily stored in the feed inlet 12. When working, the motor 2 is started. The first eccentric wheel 22 and the second eccentric wheel 23 are driven to rotate by the motor 2. When the first eccentric wheel 22 rotates, it drives the first gear 43 on it to rotate. Under the cooperation of the first gear 43 and the synchronous belt 42, the first gear 43 on the tension wheel 44 drives the tension wheel 44 to rotate. The tension wheel 44 drives the conveyor belt 4 to rotate. Under the action of the scraper 41, the conveyor belt 4 can continuously and quantitatively transport the ore in the feed port 12 to the crushing chamber 11, avoiding the situation where the discharge port 13 is blocked due to excessive feed, which helps to improve work efficiency. Under the action of the synchronous belt 42, the second gear 54 drives the lever 55 to rotate. The lever 55 intermittently contacts the abutment post 56 on the screen plate 5, and with the help of the spring 53, the screen plate 5 vibrates up and down. The ore unloaded from the conveyor belt 4 will fall onto the screen plate 5 first. Large ore particles will be blocked and continue to slide down along the inclined screen plate 5, slowing down the falling process. Small ore particles will fall directly through the screen holes to the discharge port 13, avoiding the simultaneous entry of large and small ore particles into the crushing chamber 11, which would lead to the over-crushing of small ore particles. It also avoids small ore particles occupying the internal space of the crushing chamber 11, which is conducive to improving work efficiency. The ore unloaded from the conveyor belt 4 falls between the first liner plate 111 and the second liner plate 32. The first eccentric wheel 22 and the second eccentric wheel 23 are driven to rotate by the motor 2. Under the action of the connecting rod 33, the jaw plate 3 moves back and forth in the crushing chamber 11 to crush the ore that falls between the first liner plate 111 and the second liner plate 32. The crushed ore is discharged through the discharge port 13. Since the eccentric directions of the first eccentric wheel 22 and the second eccentric wheel 23 are the same, when the first eccentric wheel 22 drives the jaw plate 3 to move closer to the first liner plate 111, the second eccentric wheel 23 drives the second liner plate 32 to slide obliquely downward through the connecting sleeve 322. The second liner plate 32 slides obliquely downward relative to the jaw plate 3, thereby reducing the space between the bottom end of the jaw plate 3 and the first liner plate 111, thus achieving the effect of strengthening the crushing of the lower layer ore. When the first eccentric wheel 22 drives the jaw plate 3 away from the first liner plate 111, the second eccentric wheel 23 drives the second liner plate 32 to slide obliquely upward relative to the jaw plate 3, thereby increasing the space between the top end of the jaw plate 3 and the first liner plate 111, thus achieving the effect of increasing the bite of the upper layer ore. This process is repeated to achieve the effect of large bite of the upper layer ore and strong clamping of the lower layer ore. This avoids the problem that in the existing technology, the upper layer material can be fully squeezed by the passive jaw and the fixed jaw during the crushing process, while the lower layer material is restricted by the fixed structure, which is prone to insufficient compression stroke and uneven force, resulting in insufficient crushing. This improves production efficiency. Meanwhile, the crushed ore is discharged directly through the discharge port 13. During the reciprocating sliding process of the second liner 32 relative to the jaw plate 3, the second liner 32 drives the unblocking rod 34 to reciprocate within the discharge port 13, thereby avoiding bridging or even blockage of the ore within the discharge port 13, reducing the frequency of maintenance and unblocking of the discharge port 13, and further improving production efficiency.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency crushing device for mining, comprising a shell (1), characterized in that: The housing (1) has a crushing chamber (11) inside. A first liner (111) is fixedly installed on the inner wall of the crushing chamber (11). A rotating shaft driven by an independent power source is rotatably connected inside the crushing chamber (11). A first eccentric wheel (22) and a second eccentric wheel (23) are fixedly installed on the rotating shaft. The eccentric directions of the first eccentric wheel (22) and the second eccentric wheel (23) are the same, and the eccentric distance of the second eccentric wheel (23) is greater than the eccentric distance of the first eccentric wheel (22). A jaw plate (3) is rotatably sleeved on the outer wall of the first eccentric wheel (22), and a connecting rod (33) is rotatably connected on the outer wall of the jaw plate (3). The end of the connecting rod (33) away from the jaw plate (3) is rotatably connected to the inner wall of the crushing chamber (11). A second liner (32) is slidably connected to the outer wall of the jaw plate (3) near the first liner (111). A bracket (321) is provided on the top outer wall of the second liner (32). A connecting sleeve (322) is rotatably sleeved on the outer wall of the second eccentric wheel (23). The bracket (321) is rotatably connected to the outer wall of the connecting sleeve (322). The bottom inner wall of the crushing chamber (11) is provided with a discharge port (13), and the second liner (32) is provided with a dredging component; The housing (1) is provided with a conveyor belt (4) extending to the top of the crushing chamber (11) and a transmission assembly for driving the conveyor belt (4) to run. An inclined screen plate (5) is slidably connected to the top inner wall of the crushing chamber (11). The housing (1) is also provided with a vibration assembly for driving the screen plate (5) to vibrate.

2. The high-efficiency crushing device for mining according to claim 1, characterized in that: The power source is provided by a gearbox (21) and a motor (2) installed on the outer wall of the housing (1). The input end of the gearbox (21) is fixedly connected to the main shaft of the motor (2), and the output end of the gearbox (21) is fixedly connected to the rotating shaft shared by the first eccentric wheel (22) and the second eccentric wheel (23).

3. The high-efficiency crushing device for mining according to claim 1, characterized in that: The unblocking assembly includes an unblocking rod (34), which is rotatably connected to the outer wall of the second liner (32). The unblocking rod (34) extends into the discharge port (13) and is a T-shaped part.

4. The high-efficiency crushing device for mining according to claim 1, characterized in that: A limiting groove (31) is provided on the outer wall of the jaw plate (3), and a limiting block (323) is provided on the outer wall of the second liner plate (32) and is slidably inserted into the limiting groove (31).

5. The high-efficiency crushing device for mining according to claim 1, characterized in that: A pair of tensioning wheels (44) are rotatably connected to the inner wall of the housing (1) via a rotating shaft. The conveyor belt (4) is sleeved on the outer wall of the two tensioning wheels (44). A funnel-shaped feeding port (12) is opened on the outer wall of the housing (1) near the bottom of the conveyor belt (4). Several sets of equidistant linearly distributed polyurethane scrapers (41) are provided on the outer wall of the conveyor belt (4).

6. A high-efficiency crushing device for mining according to claim 5, characterized in that: The transmission assembly includes two first gears (43), which are respectively fixedly mounted on the common shaft of the tension wheel (44) shaft and the first eccentric wheel (22) and the second eccentric wheel (23). A synchronous belt (42) is fitted on the outer wall of the two first gears (43) through meshing.

7. The high-efficiency crushing device for mining according to claim 1, characterized in that: The vibration assembly includes an abutment post (56) fixed on the outer wall of the screen plate (5), and a second gear (54) that meshes with the timing belt (42) is rotatably connected to the outer wall of the housing (1). A lever (55) that can contact the abutment post (56) is fixedly installed on the outer wall of the second gear (54).

8. A high-efficiency crushing device for mining according to claim 7, characterized in that: The outer wall of the sieve plate (5) is provided with a sliding column (51) that is slidably inserted into the top outer wall of the housing (1). The top outer wall of the sliding column (51) is provided with a boss (52). A spring (53) is provided between the outer wall of the boss (52) and the outer wall of the housing (1).

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