A mining roller crusher with the function of automatically eliminating overload and deadlock

Abstract

A mining double-roll crusher with the function of self-eliminating overload and death, comprising a double-roll crusher main unit, a frame, and a drive motor, wherein the double-roll crusher main unit and the drive motor are fixedly arranged on the frame; two conical crushing rollers with adjacent large and small heads are rotatably arranged in the double-roll crusher main unit; the drive motor drives the crushing rollers to rotate through an overload vibration coupling; when the crusher is working, there is a speed difference between the two conical crushing rollers, and the speed difference causes a shearing effect on the ore during extrusion and crushing, thereby improving the crushing effect of the ore; when the roller gap between the crushing rollers needs to be adjusted, it can be achieved by moving the crushing rollers toward the small head end along the axis line, so the roller gap adjustment is simple and fast; when the crusher is overloaded and died due to excessive feeding, the overload vibration coupling causes the crushing rollers to vibrate in the axial direction and the roller gap to widen periodically, and the ore falls directly from the widened roller gap under the action of the vibration, so the overload and death problem can be eliminated automatically without manual intervention.

Description

Technical Field

[0001] The invention relates to the technical field of ore crushing equipment for mining enterprises, and in particular to a mining double-roller crusher with a function of automatically eliminating overload and swelling. Background Art

[0002] In recent years, in order to reduce the energy consumption of ore processing, most mining companies have adopted a production process of more crushing and less grinding, adding a high-pressure roller mill or a roller crusher between the ore crushing and ball milling processes to reduce the particle size of the ore before ball milling; the high-pressure roller mill and the roller crusher have similar structures, but different working principles, so the results after ore processing are also different; the high-pressure roller mill adopts the principle of high-pressure material layer crushing, and the feed is pressurized. After the ore is squeezed under high pressure, the internal structure of the ore is completely destroyed, causing a large number of micro cracks inside the ore, forming an internal A large number of micro-cracked material cakes and powders are produced, which is beneficial for the subsequent ball milling of the ore. The double-roll crusher adopts the principle of extrusion crushing, with uniform feeding. The ore is crushed into smaller particles by the reduced roller gap caused by rotation. Therefore, it is mostly used for sand making. When used for further crushing of ore before ball milling, its effect is not as good as that of high-pressure roller mill. However, due to the huge cost advantage of double-roll crusher over high-pressure roller mill, it is still widely used in small and medium-sized mining enterprises to replace high-pressure roller mill for further crushing of ore before ball milling.

[0003] To improve the treatment effect of the roller crusher on the ore before ball milling, a method of using different roller speeds is used. The speed difference of the rollers is used to cause shearing effect on the ore during extrusion and crushing, thereby improving the crushing effect of the ore. However, this method will aggravate the wear of the roller sleeves, thereby increasing the frequency of roller gap adjustment. When adjusting the roller gap of the roller crusher, it is necessary to simultaneously adjust the wedges or gasket adjustment devices at both ends of the crushing roller to ensure the parallelism of the two crushing rollers. Therefore, roller gap adjustment is relatively complicated and time-consuming, thus affecting the economic benefits of the enterprise. In addition, the overload protection of the roller crusher adopts a limited-distance hydraulic coupling. When the roller crusher is fed too much during operation (which is more likely to happen when using direct feeding from a hopper), it will cause the roller crusher to overload and swell. At this time, the limited-distance hydraulic coupling releases the power coupling of the power end to the crushing roller, but cannot eliminate the overload and swell of the roller crusher itself. It can only stop and issue an alarm. The ore in the roller crusher must be manually removed and then restarted without load. Therefore, the processing cycle is long, which also affects the economic benefits of the enterprise. Summary of the Invention

[0004] In order to overcome the deficiencies in the background technology, the present invention discloses a mining double-roll crusher with the function of self-eliminating overload and death, comprising a double-roll crusher main unit, a frame, and a drive motor combination, wherein the double-roll crusher main unit and the drive motor combination are fixedly arranged on the frame; two conical crushing rollers with adjacent large and small heads are rotatably arranged in the double-roll crusher main unit; the drive motor combination drives the crushing rollers to rotate through an overload vibration coupling; when the crusher is working, there is a speed difference between the two conical crushing rollers, and the speed difference causes a shearing effect to be generated during the extrusion and crushing of the ore, thereby improving the crushing effect of the ore; when it is necessary to adjust the roller gap between the crushing rollers, it can be achieved by moving the crushing rollers along the axis toward the small head end, so the roller gap adjustment is simple and fast; when the crusher is overloaded and died due to excessive feeding, the overload vibration coupling causes the crushing rollers to vibrate in the axial direction and the roller gap to widen periodically, and the ore falls directly from the widened roller gap under the action of the vibration, so the overload and death problem can be eliminated automatically without manual intervention.

[0005] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical scheme: a mining double-roll crusher with the function of self-eliminating overload and deadlock, comprising a double-roll crusher main unit, a frame, and a drive motor combination, wherein two crushing rollers are rotatably arranged in the double-roll crusher main unit; the double-roll crusher main unit and the drive motor combination are fixedly arranged on the frame, and the drive motor combination is driven and connected to the crushing rollers; the two crushing rollers are conical rollers, and the two conical rollers are arranged adjacent to each other with large and small heads; the conical crushing rollers and the arrangement method enable the two crushing rollers at the same radial position to have a speed difference when the crushing rollers rotate relative to each other at the same speed, so there is also a shearing effect when squeezing and crushing the ore, thereby improving the crushing effect of the ore.

[0006] Furthermore, bearing seats are provided at both ends of the crushing roller for rotation through bearings, and slide rails are fixedly provided on the frame, and the bearing seats are slidably connected to the slide rails; when axial force is applied to the crushing roller, the crushing roller drives the bearing seats to move linearly along the slide rails, so that the roller gap between the two crushing rollers changes, and at the same time, the axes of the two crushing rollers remain parallel, so the roller gap between the two crushing rollers is adjusted very simply and quickly.

[0007] Furthermore, the drive motor assembly includes a drive motor and a motor bracket, and the drive motor is fixed to the frame through the motor bracket; the output shaft of the drive motor is connected to the small end of the crushing roller through an overload vibration coupling; when the crusher is overloaded and swelled due to excessive feeding, the crushing roller stops rotating, and the overload vibration coupling will generate vibration along the axis of the crushing roller under the action of the drive motor. The vibration will cause the crushing roller to move periodically along the axis, causing the roller gap to widen periodically, and the ore will fall directly from the widened roller gap under the action of the vibration, causing the crusher to reduce feeding and resume rotation by itself, so the overload swell problem can be eliminated automatically without human intervention.

[0008] Furthermore, the overload vibration coupling includes a magnetic coupling, an outer sleeve, an end cover, and a butterfly spring; the magnetic coupling is a short flange sleeve, the end face of the outer flange of which is inlaid with permanent magnets in an array around the axis of the magnetic coupling, and the magnetic poles of the permanent magnets in two adjacent radial rows are opposite; the outer flange end faces of the two magnetic couplings are opposite, and are connected by the magnetic force of the permanent magnets; the outer sleeve is arranged on the outside of the two magnetic couplings, and the end covers are fixed at both ends of the outer sleeve; a number of butterfly springs are arranged between the end covers and the inner end faces of the magnetic coupling flanges; one of the magnetic couplings is fixedly connected to the output shaft of the drive motor, and the other magnetic coupling is fixedly connected to the small head end of the crushing roller; under normal circumstances, the two magnetic couplings remain coupled under the action of the permanent magnet attraction, and the drive motor outputs power to the crushing roller through the overload vibration coupling to drive the crushing roller to rotate; when the crusher is overloaded and dead, the crushing roller stops rotating, the two magnetic couplings lose coupling and begin to rotate relative to each other, and when the permanent magnets on the two magnetic couplings appear synchronous When the magnetic poles are relative, a repulsive force appears between the two magnetic couplings, which pushes the crushing roller to move toward the large end side, thereby increasing the roller gap between the two crushing rollers; when the permanent magnets on the two magnetic couplings change from having the same magnetic poles relative to each other to having different magnetic poles relative to each other, the repulsive force between the two magnetic couplings will turn into an attractive force, which will cause the crushing roller to move toward the small end side, thereby reducing the roller gap between the two crushing rollers; therefore, when the crusher is overloaded and dead, as the two magnetic couplings rotate relative to each other, the crushing rollers move periodically along the axial direction, causing the roller gap to widen periodically, and the ore falls directly from the widened roller gap under the action of vibration, reducing the crusher feed, thereby eliminating the overload and dead problem by itself; during the period when the overload vibration coupling loses coupling, the disc spring arranged between the end cover and the inner end face of the magnetic coupling flange will generate tension between the two magnetic couplings. This tension prevents the crushing rollers from completely separating the two magnetic couplings due to excessive axial displacement, resulting in failure of the magnetic coupling.

[0009] Furthermore, the butterfly spring is a slotted butterfly spring, which is provided with preload; the slotted butterfly spring has a negative stiffness working curve, and the slotted butterfly spring works in the negative stiffness curve area after being preloaded, so when the crushing roller undergoes axial displacement, the tension between the two magnetic couplings remains unchanged.

[0010] Preferably, the output shaft of the drive motor and the small end of the crushing roller are connected by two magnetic couplings; the magnetic coupling is a short flange sleeve, and its outer flange end face is inlaid with permanent magnets in an array around the axis of the magnetic coupling, and the magnetic poles of the permanent magnets in two adjacent radial rows are opposite; the outer flange end faces of the two magnetic couplings are opposite, and are connected by magnetic attraction of the permanent magnets; one of the magnetic couplings is fixedly connected to the output shaft of the drive motor, and the other magnetic coupling is fixedly connected to the small end of the crushing roller.

[0011] Furthermore, the magnetic coupling also includes a buffer body and a buffer head, and the buffer body and the buffer head are arranged in the inner hole of the magnetic coupling; the inner end face of the buffer head is in conflict with the end face of one side of the buffer body, the outer end face of the buffer head is higher than the working end face of the coupling body, and the other end face of the buffer body is in conflict with the end of the output shaft of the drive motor or the end of the small shaft of the crushing roller; when the overload vibration coupling is working normally, the outer end faces of the buffer heads in the two magnetic couplings are in conflict, so the permanent magnets embedded in the two magnetic couplings are not in direct contact. When the overload vibration coupling loses coupling and generates vibration, the separation and collision of the two magnetic couplings occur on the outer end faces of the two buffer heads, preventing the permanent magnets from being damaged by direct collision; the buffer body is made of polyurethane elastic material to absorb the energy of the collision of the two buffer heads, preventing the bearings of the drive motor from being damaged due to excessive collision energy.

[0012] Furthermore, it also includes a return cylinder combination; the return cylinder combination includes a return spring cylinder and a return cylinder bracket, and the return spring cylinder is fixedly arranged on the big head side of the crushing roller through the return cylinder bracket; the return spring cylinder extends out a return shaft, and a return head is provided at the end of the return shaft, and the outer end face of the return head is in contact with the bearing seat; the return cylinder combination is used to replace the disc spring in the overload vibration coupling, simplify the structure of the overload vibration coupling, and make the crushing roller and the drive motor only connected by two magnetic couplings; the return cylinder combination generates thrust at the big head end of the crushing roller, and the thrust prevents the crushing roller from failing due to excessive axial displacement, which causes the two magnetic couplings to be completely separated.

[0013] Furthermore, an upper shell is provided on the upper side of the crushing roller, and a material baffle is provided on the inner side of the upper shell to prevent the ore from falling out of the roller gap.

[0014] Due to the adoption of the technical scheme as described above, the present invention has the following beneficial effects: a mining double-roll crusher with the function of self-eliminating overload and death disclosed by the present invention includes a double-roll crusher main unit, a frame, and a drive motor assembly, and the double-roll crusher main unit and the drive motor assembly are fixedly arranged on the frame; two conical crushing rollers with adjacent large and small heads are rotatably arranged in the double-roll crusher main unit; the drive motor assembly drives the crushing rollers to rotate through an overload vibration coupling; when the crusher is working, there is a speed difference between the two conical crushing rollers, and the speed difference causes a shearing effect to be generated during the extrusion and crushing of the ore, thereby improving the crushing effect of the ore; when it is necessary to adjust the roller gap between the crushing rollers, it can be achieved by moving along the axis of the crushing roller toward the small head end, so the roller gap adjustment is simple and fast; when the crusher is overloaded and died due to excessive feeding, the overload vibration coupling will cause the crushing roller to vibrate in the axial direction and make the roller gap periodically widen, and the ore falls directly from the widened roller gap under the action of vibration, so the overload and death problem can be eliminated automatically without manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the appearance of a mining roller crusher with a self-eliminating overload and deadlock function according to Example 1;

[0016] Figure 2 This is a schematic diagram of the appearance of the main machine of the roller crusher;

[0017] Figure 3 This is an exploded diagram of the main structure of the roller crusher;

[0018] Figure 4 This is a schematic diagram of the rack appearance;

[0019] Figure 5 This is a schematic diagram of the appearance of the drive motor assembly;

[0020] Figure 6 This is a schematic diagram of the appearance of the overload vibration coupling;

[0021] Figure 7 Schematic diagram of the cross-sectional structure of the overload vibration coupling;

[0022] Figure 8 This is a schematic diagram of the explosion of the overload vibration coupling structure;

[0023] Figure 9 Schematic diagram of the inner structure of the upper shell;

[0024] Figure 10 This is a schematic diagram of the appearance of a mining roller crusher with a self-eliminating overload and deadlock function according to Example 2;

[0025] Figure 11 This is a schematic diagram of the appearance of the homing cylinder assembly.

[0026] In the figure: 1. Main unit of double-roll crusher; 1.1. Upper shell; 1.1.1. Material baffle; 1.2. Lower shell; 1.3. Crushing roller; 1.4. Bearing seat; 2. Frame; 2.1. Upper frame; 2.2. Lower frame; 2.3. Slide rail; 3. Drive motor assembly; 3.1. Drive motor; 3.2. Motor bracket; 4. Overload vibration coupling; 4.1. Magnetic coupling; 4.1.1. Permanent magnet; 4.1.2. Buffer body; 4.1.3. Buffer head; 4.2. Outer sleeve; 4.3. End cover; 4.4. Butterfly spring; 5. Return cylinder assembly; 5.1. Return spring cylinder; 5.1.1. Return head; 5.2. Return cylinder bracket. DETAILED DESCRIPTION

[0027] The present invention can be explained in detail by the following examples, the purpose of which is to disclose the present invention and to protect all technical improvements within the scope of the present invention. Example 1:

[0028] A mining roller crusher with the function of automatically eliminating overload and deadlock, see the attached manual Figure 1: It includes a roller crusher main machine 1, a frame 2, a drive motor assembly 3, and an overload vibration coupling 4;

[0029] See the instructions attached Figure 2 、 3 The main roller crusher 1 comprises an upper shell 1.1, a lower shell 1.2, a crushing roller 1.3, and a bearing seat 1.4. The upper shell 1.1 is provided with a feed port at the top and a baffle plate 1.1.1 on the inside. The lower shell 1.2 is provided with a discharge port at the bottom. The upper shell 1.1 and the lower shell 1.2 are fixedly connected to form a crushing chamber in the middle. The crushing rollers 1.3 are conical rollers, with two being rotatably arranged in the crushing chamber with the larger and smaller ends adjacent to each other. The bearing seats 1.4 are rotatably arranged at both ends of the crushing rollers 1.3 via bearings.

[0030] See the instructions attached Figure 4 : The frame 2 includes an upper frame 2.1, a lower frame 2.2, and a slide rail 2.3. The upper frame 2.1 and the lower frame 2.2 are a frame structure welded by channel steel; the upper frame 2.1 and the lower frame 2.2 are fixedly connected by bolts. When the crushing roller 1.3 needs to be replaced, the upper frame 2.1 can be removed from the lower frame 2.2; there are eight slide rails 2.3, which are respectively fixed to the lower part of the upper frame 2.1 and the upper part of the lower frame 2.2 by bolts. The eight slide rails 2.3 form four pairs of slide grooves; the lower shell 1.2 of the roller crusher 1 is fixedly connected to the lower frame 2.2 of the frame 2, and the bearing seat 1.4 of the crushing roller 1.3 is slidably set in the slide groove;

[0031] See the instructions attached Figure 5 :The drive motor assembly 3 includes a drive motor 3.1 and a motor bracket 3.2. The drive motor 3.1 is fixedly arranged on the side of the motor bracket 3.2; see the attached manual Figure 1 : The driving motor 3.1 is fixed to the upper part of the lower frame 2.2 through the motor bracket 3.2, and the output shaft of the driving motor 3.1 is connected to the small end of the crushing roller 1.3 through the overload vibration coupling 4; the specific connection structure of the motor bracket 3.2 and the lower frame 2.2: a through hole is provided on the connecting surface of the motor bracket 3.2, and a waist-shaped groove is provided on the connecting surface of the lower frame 2.2. When fixing the motor bracket 3.2, the bolt passes through the hinged through hole and the waist-shaped groove and is locked with a nut; when the roller gap needs to be adjusted, the nut is loosened and the motor bracket 3.2 is pulled outward to adjust the roller gap. After the roller gap is adjusted to the right position, the nut is re-tightened to fix it; the through hole, the waist-shaped groove and the bolt cooperate, and the bearing seat 1.4 and the anti-slip groove cooperate to ensure that the axes of the two crushing rollers 1.3 remain parallel during the roller gap adjustment process;

[0032] See the instructions attached Figure 6 、 78: The overload vibration coupling 4 includes a magnetic coupling 4.1, a jacket 4.2, an end cap 4.3, and a butterfly spring 4.4. One magnetic coupling 4.1 is fixedly connected to the output shaft of the drive motor 3.1, and the other magnetic coupling 4.1 is fixedly connected to the small end of the crushing roller 1.3. The magnetic coupling 4.1 is a short flange sleeve, and its outer flange end face is inlaid with permanent magnets 4.1.1 in an array around the axis of the magnetic coupling 4.1. The magnetic poles of the permanent magnets 4.1.1 in two adjacent radial rows are opposite. The outer flange end faces of the two magnetic couplings 4.1 face each other, and the permanent magnets 4.1.1 Magnetic attraction connection; the outer sleeve 4.2 is arranged on the outside of the two magnetic couplings 4.1, and the end covers 4.3 are fixedly arranged at both ends of the outer sleeve 4.2; a plurality of butterfly springs 4.4 are arranged in contact between the end covers 4.3 and the inner end faces of the magnetic coupling flange; a buffer body 4.1.2 and a buffer head 4.1.3 are also provided in the inner hole of the magnetic coupling 4.1. One end face of the buffer body 4.1.2 contacts the end face of the output shaft of the drive motor 3.1 or the end face of the small head of the crushing roller 1.3, and the other end face contacts the inner end face of the buffer head 4.1.3. The outer end faces of the two buffer heads 4.1.3 contact each other.

[0033] The mining roller crusher with the function of automatically eliminating overload and swelling is used for the transformation of the existing ore crushing production line. It is directly fixed below the hopper discharge port, with the feed port opposite to the hopper discharge port. A belt conveyor is fixed below the crusher discharge port for transporting the crushed ore. When the mining roller crusher with the function of automatically eliminating overload and swelling is working normally, the ore falls from the hopper discharge port into the crushing chamber, and the driving motor 3.1 drives the crushing rollers 1.3 to rotate in opposite directions through the overload vibration coupling 4. The ore enters the gradually decreasing roller gap and is squeezed and sheared. Crushing occurs under the action of the action; when the silo discharge port feeds too much material, causing overload and swelling, the crushing roller 1.3 stops rotating, the two magnetic couplings 4.1 lose coupling and start to rotate relative to each other, when the permanent magnets 4.1.1 on the two magnetic couplings 4.1 have the same magnetic poles facing each other, repulsion occurs between the two magnetic couplings 4.1, and the repulsion pushes the crushing roller 1.3 to move toward the big end side, thereby widening the roller gap between the two crushing rollers 1.3; when the permanent magnets 4.1.1 on the two magnetic couplings 4.1 change from having the same magnetic poles facing each other to having different magnetic poles facing each other, the two The repulsive force between the magnetic couplings 4.1 will turn into an attractive force, which will cause the crushing roller 1.3 to move toward the small end side, making the roller gap between the two crushing rollers 1.3 smaller. In addition, in the process of the repulsive force between the two magnetic couplings 4.1 turning into an attractive force, the crushing roller 1.3 will also rotate in the opposite direction to the normal working direction. This instantaneous reverse rotation will loosen the ore stuck in the roller gap, making it easier for the ore to fall from the widened roller gap. When the crusher is overloaded and swelled, with the relative rotation between the two magnetic couplings 4.1, the crushing roller 1.3 will rotate in the opposite direction to the normal working direction. .3 produces periodic movement along the axial direction, causing the roller gap to widen periodically. Under the action of vibration, the ore falls directly from the widened roller gap, reducing the ore in the crushing chamber, thereby eliminating the overload and swelling problem by itself; during the period when the overload vibration coupling 4 loses coupling, the disc spring 4.4 arranged between the end cover 4.3 and the inner end face of the magnetic coupling flange will generate tension between the two magnetic couplings 4.1. This tension prevents the crushing roller 1.3 from completely separating the two magnetic couplings 4.1 due to excessive axial displacement, resulting in failure of the magnetic coupling 4.1. Example 2:

[0034] See the instructions attached Figure 10 In this embodiment, the output shaft of the driving motor 3.1 is connected to the small end of the crushing roller 1.3 only through the magnetic coupling 4.1; the large end of the crushing roller 1.3 is fixedly provided with a homing cylinder assembly 5; see the appendix of the specification. Figure 11: The return cylinder combination 5 includes a return spring cylinder 5.1 and a return cylinder bracket 5.2. The return spring cylinder 5.1 is fixedly arranged on the big head side of the crushing roller 1.3 through the return cylinder bracket 5.2; a return shaft is extended from the return spring cylinder 5.1, and the return shaft generates thrust through the disc spring arranged inside the return spring cylinder 5.1. A return head 5.1.1 is provided at the end of the return shaft, and the outer end surface of the return head 5.1.1 conflicts with the bearing seat 1.4 at the big head end of the crushing roller 1.3; the return cylinder combination generates thrust at the big head end of the crushing roller. When the two magnetic couplings 4.1 lose coupling and generate vibration, the thrust prevents the crushing roller 1.3 from completely separating the two magnetic couplings 4.1 due to excessive axial displacement, resulting in connection failure of the magnetic coupling 4.1.

[0035] The parts not described in detail in this invention are prior art.

Claims

1. A mining roller crusher with a function of automatically eliminating overload and deadlock, comprising a roller crusher main unit (1), a frame (2), and a drive motor assembly (3), wherein two crushing rollers (1.3) are rotatably arranged in the roller crusher main unit (1); the roller crusher main unit (1) and the drive motor assembly (3) are fixedly arranged on the frame (2); and the roller crusher main unit (1) and the drive motor assembly (3) are characterized by: The driving motor assembly (3) and the crushing roller (1.3) are connected by an overload vibration coupling (4); the two crushing rollers (1.3) are tapered rollers, and the two crushing rollers (1.3) are arranged in a manner of adjacent large and small heads; bearing seats (1.4) are arranged at both ends of the crushing roller (1.3) for rotation through bearings; a slide rail (2.3) is fixedly arranged on the frame (2); the bearing seat (1.4) is slidably connected to the slide rail (2.3); the overload vibration coupling (4) includes a magnetic coupling (4.1), an outer sleeve (4.2), an end cover (4.3), and a butterfly spring (4.4); the magnetic coupling (4.1) is a short flange sleeve, and its outer flange end face is inlaid with a permanent magnet ( 4.1.1), the magnetic poles of two adjacent radial rows of permanent magnets (4.1.1) are opposite; the outer flange end faces of the two magnetic couplings (4.1) are opposite, and are connected by magnetic attraction of the permanent magnets (4.1.1); the outer sleeve (4.2) is arranged outside the two magnetic couplings (4.1), and the end cover (4.3) is fixedly arranged at both ends of the outer sleeve (4.2); a plurality of butterfly springs (4.4) are arranged between the end cover (4.3) and the inner end face of the flange of the magnetic coupling (4.1); one of the magnetic couplings (4.1) is fixedly connected to the output shaft of the drive motor (3.1), and the other magnetic coupling (4.1) is fixedly connected to the small end of the crushing roller (1.3).

2. The mining roller crusher with the function of automatically eliminating overload and deadlock according to claim 1 is characterized in that: The drive motor assembly (3) comprises a drive motor (3.1) and a motor bracket (3.2). The drive motor (3.1) is fixedly mounted on the frame (2) via the motor bracket (3.2). The output shaft of the drive motor (3.1) is connected to the small end of the crushing roller (1.3) via an overload vibration coupling (4).

3. The mining roller crusher with the function of automatically eliminating overload and deadlock according to claim 1 is characterized in that: The butterfly spring (4.4) is a slotted butterfly spring; the butterfly spring (4.4) is provided with preload.

4. The mining roller crusher with the function of automatically eliminating overload and deadlock according to claim 2 is characterized in that: The magnetic coupling (4.1) further comprises a buffer body (4.1.2) and a buffer head (4.1.3). The buffer body (4.1.2) and the buffer head (4.1.3) are arranged in the inner hole of the magnetic coupling (4.1); the inner end face of the buffer head (4.1.3) contacts the end face of one side of the buffer body (4.1.2); the outer end face of the buffer head (4.1.3) is higher than the working end face of the coupling body; the other end face of the buffer body (4.1.2) contacts the end of the output shaft of the drive motor (3.1) or the end of the small shaft of the crushing roller (1.3).

5. The mining roller crusher with the function of automatically eliminating overload and deadlock according to claim 1 is characterized in that: An upper shell (1.1) is provided on the upper side of the crushing roller (1.3), and a material blocking plate (1.1.1) is provided on the inner side of the upper shell (1.1).

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