A high-efficiency stone crushing device for mining engineering

Abstract

The present invention discloses a high-efficiency stone crushing device for mining engineering, and specifically relates to the field of ore crushing. The crushing device comprises a bracket, and a body is fixedly installed above the bracket. A fixed jaw body and a movable jaw body are respectively arranged on both sides of the body, and a fixed jaw plate and a movable jaw plate are respectively fixedly installed on the opposite sides of the fixed jaw body and the movable jaw body. A V-shaped crushing chamber is formed between the fixed jaw plate and the movable jaw plate, and the ore and stone are crushed inside the V-shaped crushing chamber; a pulling plate is arranged at the bottom end of the movable jaw plate. The present invention arranges pulling teeth and a conveyor belt. During the crushing process of the jaw crusher, if the flaky crushed stone is not further crushed and falls, the pulling teeth can block it and lift it upward, so that at least a part of the flaky crushed stone remains in the V-shaped crushing chamber to be crushed, which can ensure that no flaky crushed stone falls directly to be discharged during the crushing process of the jaw crusher, thereby reducing the crushing particle size range of the ore and stone.

Description

Technical Field

[0001] The present invention relates to the technical field of ore crushing, and more particularly to a high-efficiency stone crushing device for mining engineering. Background Art

[0002] After the ore is mined, some useless substances will be mixed in the ore. These useless substances are collectively called gangue minerals, that is, waste. These wastes occupy a considerable weight, which not only increases the transportation cost, but also reduces the efficiency of smelting. In order to avoid the cumbersome process of transporting to the factory for processing, the processing is carried out on the mine site after mining. First, the ore is crushed, and then the useful ore is selected by a magnetic separator and the waste is separated. This process requires a crusher to complete the first step.

[0003] Commonly used crushing machines include jaw crusher, gyratory crusher, cone crusher, hammer crusher, etc. Among them, jaw crusher adopts "V" shaped deep cavity design, which can effectively prevent material blockage and is widely used in mining. Jaw crusher is mainly composed of movable jaw plate, fixed jaw plate and eccentric drive structure. Ore is crushed between the movable jaw plate and the fixed jaw plate.

[0004] During the crushing process of the jaw crusher, the direction of ore crushing is highly random through extrusion crushing, resulting in some flaky crushed stones. When the bottom ends of the movable jaw plate and the fixed jaw plate move away from each other, these flaky crushed stones will be directly discharged due to their small thickness. The existence of flaky crushed stones will lead to poor crushing effect and a larger range of ore crushing particle size. Summary of the invention

[0005] The invention provides an efficient stone crushing device for mining engineering, and aims to solve the problem that some flaky crushed stones generated by the jaw crusher during the crushing process will be directly discharged when the bottom ends of the movable jaw plate and the fixed jaw plate are far away from each other, resulting in poor crushing effect and a larger range of ore crushing particle size.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency stone crushing device for mining engineering, comprising a bracket, a body fixedly installed above the bracket, a fixed jaw body and a movable jaw body are respectively arranged on both sides of the body, a fixed jaw plate and a movable jaw plate are respectively fixedly installed on the opposite sides of the fixed jaw body and the movable jaw body, a V-shaped crushing chamber is formed between the fixed jaw plate and the movable jaw plate, and ore and stone blocks are crushed inside the V-shaped crushing chamber; a pulling plate is arranged at the bottom end of the movable jaw plate, and a plurality of pulling teeth are arranged on the pulling plate along the width direction of the movable jaw plate, The pulling tooth is located directly below the gap between the fixed jaw plate and the bottom end of the movable jaw plate; a conveyor belt 1 is arranged below the pulling plate, and the conveyor belt 1 is provided with hidden openings corresponding to the pulling teeth one by one along the conveying direction, and the hidden openings are used to accommodate the pulling teeth; when the movable jaw plate has a vertical downward displacement component, the gap between the fixed jaw plate and the bottom of the movable jaw plate increases, and the pulling tooth moves to a position where the upper end is not higher than the upper surface of the conveyor belt 1. When the movable jaw plate has a vertical upward displacement component, the pulling tooth lifts the ore stone upward so that at least a part of the ore stone is located inside the V-shaped crushing chamber.

[0007] In a preferred embodiment, an eccentric drive structure is provided on the machine body, and the eccentric drive structure includes an eccentric shaft rotatably connected to the upper end of the machine body, the eccentric part of the eccentric shaft is rotatably connected to the upper end of the movable jaw body, and a motor is installed on the machine body, and the output end of the motor is connected to the eccentric shaft through a belt transmission component.

[0008] In a preferred embodiment, a power component is provided on the side of the movable jaw body away from the fixed jaw body. The power component includes a second fixed plate and a pull rod. The second fixed plate is fixedly mounted on the machine body, and the two ends of the pull rod are respectively hinged to the movable jaw body and the second fixed plate.

[0009] In a preferred embodiment, the power component also includes a fixed plate 1, a guide rod and a shift fork. The fixed plate 1 is fixedly mounted on the machine body, the guide rod is fixedly mounted on the fixed plate 1, one end of the pull plate is vertically movably sleeved on the guide rod, one end of the shift fork is hinged to the fixed plate 2, the pull rod is used to drive the shift fork to swing synchronously, and the other end of the shift fork is used to drive the pull plate to move vertically.

[0010] In a preferred embodiment, a sliding sleeve is provided on the movable sleeve of the guide rod, and the sliding sleeve is located below the end of the pull plate. Pins are fixedly connected on both sides of the sliding sleeve, and a sliding groove is provided at the end of the fork, and the pin slides inside the sliding groove.

[0011] In a preferred embodiment, elastic component 1 and elastic component 2 are sleeved on the guide rod, and elastic component 1 and elastic component 2 are pressed on the upper surface and lower surface of the end of the pull plate respectively. The cross-section of the pull tooth is a triangle, and the vertex of the triangle is set upward.

[0012] In a preferred embodiment, the power component also includes gear one, gear two and gear three which are rotatably connected to the fixed plate two, the rotation axis of gear one coincides with the axis of the hinge point between the pull rod and the fixed plate two, and gear one and the pull rod are fixed to each other, the rotation axis of gear three coincides with the axis of the hinge point between the shift fork and the fixed plate two, and gear three and the shift fork are fixed to each other, gear one, gear two and gear three are meshed in sequence, and the transmission ratio is less than 1.

[0013] In a preferred embodiment, the conveyor belt includes a conveyor frame, both ends of which are rotatably connected to a transmission shaft, a plurality of rollers are arranged on the transmission shaft, a conveyor belt is transmission-connected between the opposite rollers on the two transmission shafts, and the position between adjacent conveyor belts is a hidden opening.

[0014] In a preferred embodiment, the position of the conveyor belt directly below the pulling teeth is a flat portion, one side of the flat portion is an inclined portion, and the inclined portion is arranged to be inclined downward along the transmission direction.

[0015] In a preferred embodiment, conveyor belt 2 is arranged below conveyor belt 1, conveyor belt 1 is installed on conveyor belt 2 through support rods, conveyor belt 2 is installed with a retaining frame, the retaining frame has a plurality of retaining rods, the plurality of retaining rods are located in hidden openings at the inclined position, and the upper surface of the retaining rods is flush with the upper surface of the conveyor belt.

[0016] The technical effects and advantages of the present invention are as follows: the present invention arranges pulling teeth and a conveyor belt. During the crushing process of the jaw crusher, if the flaky gravel produced falls without being further crushed, the pulling teeth can block it and lift it upward, so that at least a part of the flaky gravel remains in the V-shaped crushing chamber to be crushed, which can ensure that no flaky gravel falls directly to be discharged during the crushing process of the jaw crusher, thereby narrowing the crushing particle size range of the ore and stone blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a sectional view of the main view of the present invention.

[0019] Figure 3 It is a schematic diagram of the local structure of the present invention.

[0020] Figure 4 For the present invention Figure 3 main view.

[0021] Figure 5 This is a schematic diagram of the structure of the installation of the pull plate and power components of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the eccentric drive structure installation of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the installation of conveyor belt 1 and conveyor belt 2 of the present invention.

[0024] Figure 8 It is a structural schematic diagram of the installation of a conveyor belt and a retaining frame of the present invention.

[0025] Fig. 9 It is an exploded view of the conveyor belt 1 and the retaining frame of the present invention.

[0026] Fig.10 The figure is a simplified motion diagram of the eccentric shaft, movable jaw and pull rod of the present invention.

[0027] The accompanying drawings are marked as follows: 1, bracket; 11, machine body; 2, fixed jaw body; 21, fixed jaw plate; 22, movable jaw body; 23, movable jaw plate; 24, V-shaped crushing chamber; 3, eccentric drive structure; 31, eccentric shaft; 32, belt transmission component; 33, motor; 4, pull plate; 40, pull tooth; 5, conveyor belt 1; 50, hidden mouth; 51, conveyor frame; 52, transmission shaft; 53, roller; 54, conveyor belt; 541, Flat part; 542, inclined part; 6, power component; 61, fixed plate one; 62, fixed plate two; 63, pull rod; 64, guide rod; 65, fork; 651, slide groove; 66, sliding sleeve; 661, pin shaft; 67, elastic component one; 68, elastic component two; 69, gear one; 691, gear two; 692, gear three; 7, conveyor belt two; 71, support rod; 8, blocking frame; 81, blocking rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in 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.

[0029] Refer to the instruction manual Figure 1-Figure 10A high-efficiency stone crushing device for mining engineering comprises a support 1, a body 11 is fixedly installed above the support 1, a fixed jaw body 2 and a movable jaw body 22 are respectively arranged on both sides of the body 11, a fixed jaw plate 21 and a movable jaw plate 23 are respectively fixedly installed on the opposite sides of the fixed jaw body 2 and the movable jaw body 22, a V-shaped crushing chamber 24 is formed between the fixed jaw plate 21 and the movable jaw plate 23, and the ore and stone are crushed inside the V-shaped crushing chamber 24; a pulling plate 4 is arranged at the bottom end of the movable jaw plate 23, and a plurality of pulling teeth 40 are arranged on the pulling plate 4 along the width direction of the movable jaw plate 23, and the pulling teeth 40 are located on the fixed jaw plate 2 1 and the bottom gap of the movable jaw plate 23; a conveyor belt 5 is arranged below the pulling plate 4, and the conveyor belt 5 is provided with hidden openings 50 corresponding to the pulling teeth 40 along the conveying direction, and the hidden openings 50 are used to accommodate the pulling teeth 40; when the movable jaw plate 23 has a vertical downward displacement component, the gap between the fixed jaw plate 21 and the bottom of the movable jaw plate 23 increases, and the pulling teeth 40 moves to a position where the upper end is not higher than the upper surface of the conveyor belt 5. When the movable jaw plate 23 has a vertical upward displacement component, the pulling teeth 40 lift the ore blocks upward, so that at least a part of the ore blocks is located inside the V-shaped crushing chamber 24.

[0030] In the above technical solution, the fixed jaw 2 is fixed to the bracket 1, and the movable jaw 22 is driven by the eccentric driving structure 3. Specifically, Figure 6 As shown, an eccentric driving structure 3 is provided on the machine body 11, and the eccentric driving structure 3 includes an eccentric shaft 31 rotatably connected to the upper end of the machine body 11, and the eccentric part of the eccentric shaft 31 is rotatably connected to the upper end of the movable jaw body 22. A motor 33 is installed on the machine body 11, and the output end of the motor 33 is transmission-connected to the eccentric shaft 31 through a belt transmission component 32.

[0031] Furthermore, if Figure 5 As shown, a power component 6 is provided on the side of the movable jaw body 22 away from the fixed jaw body 2. The power component 6 includes a second fixed plate 62 and a pull rod 63. The second fixed plate 62 is fixedly mounted on the machine body 11. The two ends of the pull rod 63 are respectively hinged to the movable jaw body 22 and the second fixed plate 62.

[0032] It should be noted that the belt transmission component 32 is a pulley transmission mode, the motor 33 drives the eccentric shaft 31 to rotate through the belt transmission component 32, and the eccentric shaft 31 drives the belt transmission component 32 to move, and its motion diagram is as follows: Fig.10 As shown, the eccentric shaft 31 rotates clockwise. When the upper end of the movable jaw body 22 rotates from top to bottom, the left end of the pull rod 63 swings from top to bottom. In this way, the gap between the bottom ends of the fixed jaw plate 21 and the movable jaw plate 23 becomes larger. This process is the process in which the movable jaw plate 23 has a vertical downward displacement component. Otherwise, the gap becomes smaller, and it is the process in which the movable jaw plate 23 has a vertical upward displacement component.

[0033] In this embodiment, the implementation method is as follows: when crushing ore blocks, the eccentric drive structure 3 first drives the movable jaw body 22 and the movable jaw plate 23 to move, and the conveyor belt 5 is driven to add ore blocks from the upper end of the V-shaped crushing chamber 24, and the ore blocks are crushed by the fixed jaw plate 21 and the movable jaw plate 23. The crushed ore blocks fall from the lower end and are transported away by the conveyor belt 5. In this crushing process, if flaky crushed stones appear and the volume of the flaky crushed stones is large, then the pulling teeth 40 will block and hold the flaky crushed stones, so that the flaky crushed stones cannot be transported away by the conveyor belt 5.

[0034] The specific processing process for flaky gravel is as follows: first, the ore stone is crushed to produce flaky gravel. When the movable jaw plate 23 has a vertical downward displacement component that increases the gap between the fixed jaw plate 21 and the bottom end of the movable jaw plate 23, the flaky gravel falls but is blocked and supported by the pulling teeth 40. When the movable jaw plate 23 has a vertical upward displacement component that decreases the gap between the fixed jaw plate 21 and the bottom end of the movable jaw plate 23, the pulling teeth 40 lifts the flaky gravel upward to ensure that at least a part of the flaky gravel is located inside the V-shaped crushing chamber 24, so that the flaky gravel is further crushed in the V-shaped crushing chamber 24.

[0035] It should be noted that when the flaky gravel is supported by the pulling tooth 40, a part of it is already located inside the V-shaped crushing chamber 24. The upward movement of the pulling tooth 40 can allow the flaky gravel to re-enter a part of the V-shaped crushing chamber 24 to facilitate crushing. In addition, as the pulling tooth 40 moves upward, the gap between the bottom ends of the fixed jaw 21 and the movable jaw 23 becomes smaller. Therefore, in the process of the pulling tooth 40 moving upward, the flaky gravel may be unable to move upward any further. At this time, the pulling tooth 40 will crush the flaky gravel. Since the thickness of the flaky gravel is not large, the pulling tooth 40 can easily crush it.

[0036] It should also be noted that the purpose of setting the conveyor belt 5 is to improve the conveying efficiency of the ore blocks to reduce the influence of the pulling teeth 40 on the falling speed of the ore blocks. It can be seen that when the conveyor belt 5 is not set, the crushed ore blocks in the V-shaped crushing chamber 24 will be blocked by the pulling teeth 40 when falling, so that the falling speed is reduced. After the conveyor belt 5 is set, when the pulling teeth 40 move downward, the pulling teeth 40 move below the transmission plane of the conveyor belt 5. In this way, during this period of time, the falling of the ore blocks will not be affected by the pulling teeth 40 and can directly fall on the conveyor belt 5 to be transported away.

[0037] The above technical scheme is provided with a pulling tooth 40 and a conveyor belt 5. During the crushing process of the jaw crusher, if the flaky gravel produced falls without being further crushed, the pulling tooth 40 can block it and lift it upward, so that at least a part of the flaky gravel remains in the V-shaped crushing chamber 24 to be crushed. In addition, in the process of lifting the flaky gravel by the pulling tooth 40, on the one hand, the pulling tooth 40 can make the flaky gravel move upward and enter a part of the inner part of the V-shaped crushing chamber 24 to improve the crushing effect. On the other hand, when the flaky gravel can no longer move upward, the pulling tooth 40 can also crush the flaky gravel. In this way, it can be ensured that no flaky gravel falls directly to be discharged during the crushing process of the jaw crusher, thereby reducing the crushing particle size range of the ore stone blocks.

[0038] Refer to the instruction manual Figure 2-Figure 5 The power component 6 also includes a fixed plate 61, a guide rod 64 and a fork 65. The fixed plate 61 is fixedly installed on the body 11, the guide rod 64 is fixedly installed on the fixed plate 61, one end of the pull plate 4 is vertically movably sleeved on the guide rod 64, one end of the fork 65 is hinged to the fixed plate 2 62, the pull rod 63 is used to drive the fork 65 to swing synchronously, and the other end of the fork 65 is used to drive the pull plate 4 to move vertically.

[0039] Furthermore, a sliding sleeve 66 is movably provided on the guide rod 64 , and the sliding sleeve 66 is located below the end of the pull plate 4 . Pin shafts 661 are fixedly connected to both sides of the sliding sleeve 66 . A sliding groove 651 is provided at the end of the fork 65 , and the pin shaft 661 slides inside the sliding groove 651 .

[0040] Furthermore, an elastic component 1 67 and an elastic component 2 68 are sleeved on the guide rod 64, and the elastic component 1 67 and the elastic component 2 68 are pressed on the upper surface and the lower surface of the end of the pull plate 4 respectively. The cross-section of the pulling tooth 40 is a triangle, and the vertex of the triangle is set upward.

[0041] It should be noted that the purpose of setting the triangle is that when the pulling teeth 40 break the flaky gravel, the upper end can apply greater stress to the flaky gravel to facilitate breaking.

[0042] Furthermore, the power component 6 also includes gear one 69, gear two 691 and gear three 692 which are rotatably connected to the fixed plate two 62, the rotation axis of gear one 69 coincides with the axis of the hinge point between the pull rod 63 and the fixed plate two 62, and gear one 69 and the pull rod 63 are fixed to each other, the rotation axis of gear three 692 coincides with the axis of the hinge point between the shift fork 65 and the fixed plate two 62, and gear three 692 and the shift fork 65 are fixed to each other, gear one 69, gear two 691 and gear three 692 are meshed in sequence, and the transmission ratio is less than 1.

[0043] It should be noted that during the crushing process of the jaw crusher, the pull rod 63 swings up and down. When the pull rod 63 swings up or down, the pull plate 4 moves up or down accordingly. Taking the pull rod 63 swinging down as an example, the pull rod 63 drives the fork 65 to swing through the gear 1 69, the gear 2 691 and the gear 3 692. The three gears are engaged, so that the fork 65 and the pull rod 63 can swing downward together. The fork 65 pushes the sliding sleeve 66 to move downward. Under the action of the elastic component 1 67 and the elastic component 2 68, the pull plate 4 moves downward. Among them, the elastic component 1 67 and the elastic component 2 68 are both compression springs.

[0044] It should also be noted that the purpose of linking the movement of the pull plate 4 and the pull rod 63 is to ensure their synchronous movement and prevent the occurrence of asynchronous problems. In addition, since the swing amplitude of the pull rod 63 is small, if the stroke of the pull plate 4 is small, the gap between the bottom of the movable jaw plate 23 and the conveyor belt 5 will be small, which is not conducive to the falling and transportation of ore blocks. Therefore, it is necessary to increase the stroke of the pull plate 4. The above technical solution adopts the method of meshing transmission of gear 1 69, gear 2 691 and gear 3 692 to ensure the synchronization of the swing direction while making the transmission ratio less than 1. The swing angle of the fork 65 can be increased, thereby increasing the stroke of the pull plate 4, and finally the distance between the bottom end of the movable jaw plate 23 and the conveyor belt 5 can be set larger, which is conducive to the rapid falling and transportation of materials.

[0045] Refer to the instruction manual Figure 7-Figure 9 The conveyor belt 5 includes a conveyor frame 51, both ends of the conveyor frame 51 are rotatably connected with a transmission shaft 52, and a plurality of rollers 53 are arranged on the transmission shaft 52. A conveyor belt 54 is transmission-connected between the rollers 53 opposite to each other on the two transmission shafts 52, and the position between adjacent conveyor belts 54 is a hidden opening 50.

[0046] It should be noted that when the pulling tooth 40 moves downward to the lowest point, it is higher than the transmission shaft 52 .

[0047] Furthermore, the position of the conveyor belt 54 directly below the pulling teeth 40 is a flat portion 541 , one side of the flat portion 541 is an inclined portion 542 , and the inclined portion 542 is arranged to be inclined downward along the transmission direction.

[0048] Furthermore, a conveyor belt 2 7 is arranged below the conveyor belt 1 5. The conveyor belt 1 5 is installed on the conveyor belt 2 7 through a support rod 71. A blocking frame 8 is installed on the conveyor belt 2 7. The blocking frame 8 has a plurality of blocking rods 81. The plurality of blocking rods 81 are located in the hidden opening 50 at the position of the inclined portion 542. The upper surface of the blocking rod 81 is flush with the upper surface of the conveyor belt 54.

[0049] It should be noted that, during the material conveying process, a resisting rod 81 is provided in the area of ​​the inclined portion 542 to prevent the ore from entering the hidden opening 50. By providing the inclined portion 542, the ore can slide freely down from the inclined portion 542, thereby preventing the ore from accumulating in the non-conveying area of ​​the resisting rod 81 and affecting the conveying effect of the ore in the conveying area. The conveyor belt 2 7 is used to convey the ore blocks falling from the conveyor belt 1 5.

[0050] Finally: The above description is only a preferred embodiment of the present invention and is 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 high-efficiency stone crushing device for mining engineering, characterized by: The invention comprises a support (1), a body (11) is fixedly mounted above the support (1), a fixed jaw body (2) and a movable jaw body (22) are respectively arranged on two sides inside the body (11), a fixed jaw plate (21) and a movable jaw plate (23) are respectively fixedly mounted on opposite sides of the fixed jaw body (2) and the movable jaw body (22), a V-shaped crushing chamber (24) is formed between the fixed jaw plate (21) and the movable jaw plate (23), and ore blocks are crushed inside the V-shaped crushing chamber (24); A pulling plate (4) is provided at the bottom end of the movable jaw plate (23), and the pulling plate (4) is provided with a plurality of pulling teeth (40) along the width direction of the movable jaw plate (23), and the pulling teeth (40) are located directly below the gap between the bottom ends of the fixed jaw plate (21) and the movable jaw plate (23); A conveyor belt 1 (5) is provided below the pulling plate (4), and the conveyor belt 1 (5) is provided with hidden openings (50) corresponding one to one with the pulling teeth (40) along the conveying direction, and the hidden openings (50) are used to accommodate the pulling teeth (40); When the movable jaw plate (23) has a vertical downward displacement component, the gap between the fixed jaw plate (21) and the bottom of the movable jaw plate (23) increases, and the pulling teeth (40) move to a position where the upper end is not higher than the upper surface of the conveyor belt (5). When the movable jaw plate (23) has a vertical upward displacement component, the pulling teeth (40) lift the ore block upward, so that at least a part of the ore block is located inside the V-shaped crushing chamber (24); A power component (6) is provided on a side of the movable jaw body (22) away from the fixed jaw body (2), and the power component (6) comprises a second fixed plate (62) and a pull rod (63). The second fixed plate (62) is fixedly mounted on the machine body (11), and two ends of the pull rod (63) are respectively hinged to the movable jaw body (22) and the second fixed plate (62); The power component (6) further comprises a fixing plate (61), a guide rod (64) and a shift fork (65); the fixing plate (61) is fixedly mounted on the machine body (11); the guide rod (64) is fixedly mounted on the fixing plate (61); one end of the pull plate (4) is vertically movably sleeved on the guide rod (64); one end of the shift fork (65) is hinged to the fixing plate (62); the pull rod (63) is used to drive the shift fork (65) to swing synchronously; and the other end of the shift fork (65) is used to drive the pull plate (4) to move vertically; A sliding sleeve (66) is provided on the movable sleeve of the guide rod (64), and the sliding sleeve (66) is located below the end of the pull plate (4). Pins (661) are fixedly connected to both sides of the sliding sleeve (66). A sliding groove (651) is provided at the end of the shift fork (65), and the pin (661) slides inside the sliding groove (651). The guide rod (64) is sleeved with an elastic component 1 (67) and an elastic component 2 (68), and the elastic component 1 (67) and the elastic component 2 (68) are pressed against the upper surface and the lower surface of the end of the pull plate (4) respectively; The power component (6) also includes gear one (69), gear two (691) and gear three (692) which are rotatably connected to the fixed plate two (62); the rotation axis of the gear one (69) coincides with the axis of the hinge point between the pull rod (63) and the fixed plate two (62); the gear one (69) and the pull rod (63) are fixed to each other; the rotation axis of the gear three (692) coincides with the axis of the hinge point between the shift fork (65) and the fixed plate two (62); the gear three (692) and the shift fork (65) are fixed to each other; the gear one (69), gear two (691) and gear three (692) are meshed in sequence, and the transmission ratio is less than 1.

2. The high-efficiency stone crushing device for mining engineering according to claim 1 is characterized by: An eccentric drive structure (3) is provided on the machine body (11), and the eccentric drive structure (3) comprises an eccentric shaft (31) rotatably connected to the upper end of the machine body (11), and an eccentric portion of the eccentric shaft (31) is rotatably connected to the upper end of the movable jaw (22). A motor (33) is installed on the machine body (11), and an output end of the motor (33) is transmission-connected to the eccentric shaft (31) via a belt transmission component (32).

3. The high-efficiency stone crushing device for mining engineering according to claim 1 is characterized by: The cross section of the pulling tooth (40) is triangular, and the vertex of the triangle is arranged upward.

4. The high-efficiency stone crushing device for mining engineering according to claim 1 is characterized in that: The conveyor belt 1 (5) comprises a conveyor frame (51), both ends of which are rotatably connected to a transmission shaft (52), a plurality of rollers (53) are arranged on the transmission shaft (52), a conveyor belt (54) is transmission-connected between the rollers (53) opposite to each other on the two transmission shafts (52), and a hidden opening (50) is located between adjacent conveyor belts (54).

5. The high-efficiency stone crushing device for mining engineering according to claim 4 is characterized in that: The position of the conveyor belt (54) directly below the pulling teeth (40) is a flat portion (541), one side of the flat portion (541) is an inclined portion (542), and the inclined portion (542) is arranged to be inclined downward along the transmission direction.

6. The high-efficiency stone crushing device for mining engineering according to claim 5, characterized in that: A conveyor belt 2 (7) is arranged below the conveyor belt 1 (5). The conveyor belt 1 (5) is installed on the conveyor belt 2 (7) through a support rod (71). A retaining frame (8) is installed on the conveyor belt 2 (7). The retaining frame (8) has a plurality of retaining rods (81). The plurality of retaining rods (81) are located in a hidden opening (50) at the position of the inclined portion (542). The upper surface of the retaining rod (81) is flush with the upper surface of the conveyor belt (54).

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