Scraper reversed loader for coal mine

Abstract

The invention discloses a scraper reversed loader for a coal mine, and relates to the technical field of conveying equipment for the coal mine, the scraper reversed loader comprises a U-shaped chute frame, a chain wheel, an annular chain, a scraper piece and a material guide plate, the material guide plate is fixedly arranged in the U-shaped chute frame, the annular chain is connected with the chain wheel in a matched mode, and the scraper reversed loader further comprises an anti-clamping guide mechanism; the anti-clamping guide mechanism comprises a right-angle guide plate and a pushing mechanism, and the pushing mechanism comprises an elastic impact piece and a friction wheel matched with the annular chain. In the process that the annular chain moves and passes through the right-angle guide plate, the distributed friction wheels rotate by means of friction force, each friction wheel rotates by means of transmission of the steering bevel gear, the collision rod is linked to eject out large coal blocks entering the right-angle guide plate, and therefore the large coal blocks enter the right-angle guide plate. Crushing to a certain degree is achieved by means of ejection impact motion, and abrasion of large coal blocks clamped between the right-angle guide plate and the annular chain is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying equipment for coal mines, and particularly to a scraper reclaimer for coal mines. Background Art

[0002] Scraper reclaimers are usually used in underground coal mine working faces, generally assembled between scraper conveyors and belt conveyors, and are responsible for transporting the coal mined by coal shearers to the belt conveyor. They are one of the key equipment for continuous coal mining.

[0003] Existing scraper reclaimers generally include chutes, chains and scrapers. The chains drive the scrapers to move in the chutes to achieve the transportation of coal materials. And the reclaimer generally includes a straight section and a bending section to facilitate the transportation of coal materials from one height position to another height position. And in order to constrain the movement track of the chains and ensure the stable and effective operation of the chains, guide plates that cooperate with the chains need to be installed on both sides inside the chutes.

[0004] The deficiencies of existing scraper reclaimers are as follows: Although existing scraper reclaimers can effectively complete the transfer of coal materials and guide plates are provided on both sides of the chute to guide and constrain the movement track of the chains, since the chains need to be connected to the scrapers to drive the scrapers to move, the side of the guide plate close to the scraper must be open. Thus, when the scrapers push the coal materials under the drive of the chains, some coal materials are likely to enter between the guide plates and the chains, especially some large pieces of coal materials. Once stuck in the guide plates, it will cause relatively serious wear to the chains, affect the operation of the chains, and reduce the service life of the chains. And existing scraper reclaimers are not convenient for better handling the situation where coal materials are stuck in the guide plates. Summary of the Invention

[0005] The purpose of the present invention is to provide a scraper reclaimer for coal mines to solve the technical problem in the prior art that the scraper reclaimer is not convenient for handling the coal materials stuck during the operation of the chains.

[0006] The technical problem to be solved by the present invention can be achieved through the following technical solutions:

[0007] A scraper reclaimer for coal mines includes a U-shaped chute frame, sprockets, endless chains, scraper members and a material guiding plate. The material guiding plate is fixedly arranged inside the U-shaped chute frame. The endless chains are cooperatively connected with the sprockets. There are multiple scraper members, which are equidistantly distributed along the endless chains. It further includes an anti-jamming guiding mechanism;

[0008] The anti-jamming guiding mechanism includes a right-angle guiding plate and a pushing mechanism. The right-angle guiding plate is fixedly arranged on the material guiding plate and is distributed along the inside of the U-shaped chute frame in a matching manner. The annular chain passes through the right-angle guiding plate. The pushing mechanism is provided with multiple groups and is equidistantly distributed along the inner side of the right-angle guiding plate. Each group of the pushing mechanism includes an elastic impact member and a friction wheel that cooperates with the annular chain. The friction wheel rotates by the frictional action of the running annular chain. A transmission mechanism is arranged between the friction wheel and the elastic impact member, and the transmission mechanism is used to convert the rotational motion of the friction wheel into a linear motion and drive the elastic impact member to reciprocate.

[0009] Preferably, each group of the pushing mechanism further includes a mounting block and a mounting cavity. The mounting block is arranged at the upper inner side of the right-angle guiding plate. The friction wheel is rotatably arranged on one side of the mounting block away from the center of the U-shaped chute frame. The mounting cavity is arranged in the mounting block. The transmission mechanism is arranged in the mounting cavity. The elastic impact member is arranged on one side of the mounting block close to the center of the U-shaped chute frame, and one end of the elastic impact member penetrates into the mounting cavity.

[0010] Preferably, the transmission mechanism includes a steering transmission gear mechanism, a missing gear, and a rack. The friction wheel drives the missing gear to rotate through the steering transmission gear mechanism. The rack is fixedly connected to the elastic impact member and cooperates with the missing gear.

[0011] Preferably, the steering transmission gear mechanism includes a first steering bevel gear and a second steering bevel gear. The first steering bevel gear is coaxially and fixedly connected to the friction wheel. The second steering bevel gear is rotatably connected to one side inside the mounting cavity, and the second steering bevel gear meshes with the first steering bevel gear. The missing gear is coaxially and fixedly connected to the second steering bevel gear.

[0012] Preferably, the elastic impact member includes an impact rod and a return spring. A guide sleeve is fixedly connected to the top inside the mounting cavity. One end of the impact rod slides through the guide sleeve, and the end of the impact rod is connected to the guide sleeve through the return spring. The other end of the impact rod passes out from the bottom of the mounting block, and the impact rod is inclined towards the material guiding plate. The rack is fixedly connected to the impact rod.

[0013] Preferably, elastic telescopic connecting rods are arranged on both sides of the top of the mounting block, and the mounting block is connected to the top inside of the right-angle guiding plate through the elastic telescopic connecting rods.

[0014] Preferably, an auxiliary baffle is fixedly connected to one side of the top of the right-angle guiding plate close to the material guiding plate.

[0015] Preferably, an inclined guiding plate is fixedly connected between the bottom of the right-angle guiding plate and the material guiding plate.

[0016] Preferably, an auxiliary movable plate is provided on the inclined guide plate, one side of the auxiliary movable plate is movably connected to the lower side of the inclined guide plate by a hinge, and the other side is separated from the higher side of the inclined guide plate, a bending spring is connected between the auxiliary movable plate and the inclined guide plate, and a push rod is fixedly connected to one side of each friction wheel away from the scraper member, and the push rod cooperates with the auxiliary movable plate.

[0017] Preferably, each of the friction wheels is fixedly connected with a plurality of convex plates equidistantly in the circumferential direction.

[0018] Beneficial effects of the present invention:

[0019] 1. When the ring-shaped chain of the present invention moves through the right-angle guide plate, the distributed friction wheels are rotated by friction force, and each friction wheel is driven by the steering bevel gear to rotate the missing gear, and the missing gear intermittently drives the rack to slide, and the rack drives the impact rod to move synchronously. Whenever the rack is driven, the impact rod is retracted into the installation cavity, and the reset spring is stretched to generate a rebound force, and then the impact rod is released by the rebound force, so that the impact rod can eject the large piece of coal entering the right-angle guide plate, and a certain degree of crushing is achieved by the ejection impact movement, thereby reducing the wear of the large piece of coal stuck between the right-angle guide plate and the ring-shaped chain, thereby reducing the impact on the operation of the ring-shaped chain.

[0020] 2. An inclined guide plate is provided at the bottom of the right-angle guide plate of the present invention. The inclined guide plate can guide the coal entering the right-angle guide plate to fall back onto the guide plate. At the same time, it can also prevent the coal from contacting the ring chain to a certain extent. In the process of rotation of the friction wheel, the push rod is also driven to rotate synchronously. The push rod continuously presses the auxiliary movable plate on the inclined guide plate, so that the auxiliary movable plate swings back and forth under the action of the pushing force and the rebound force of the bending spring, which promotes the coal to slide out from the bottom of the right-angle guide plate, and also facilitates the large pieces of coal hit by the auxiliary impact rod to separate, thereby improving the anti-stuck effect.

[0021] 3. The mounting block connected to the friction wheel of the present invention is connected to the right-angle guide plate by means of an elastic telescopic connecting rod, so that the friction wheel always maintains a close contact when the endless chain floats to a certain extent, thereby ensuring that the friction wheel can rotate during the operation of the endless chain to achieve transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall top view of the structure of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the right-angle guide plate and the material guide plate in the present invention;

[0025] Figure 4It is a schematic structural diagram of the relative position distribution of the mounting block, friction wheel, impact rod, and right-angle guide plate in the present invention;

[0026] Figure 5 It is a schematic structural diagram of the cooperative connection between the friction wheel and the impact rod in the present invention;

[0027] Figure 6 It is a schematic structural diagram of the cooperative connection between the friction wheel and the missing gear in the present invention;

[0028] Figure 7 It is a schematic structural diagram of the relative position distribution of the scraper member and the sprocket in the present invention;

[0029] Figure 8 It is Figure 7 an enlarged structural diagram of part A in

[0030] Figure 9 It is a schematic structural diagram of the sprocket with an annular groove in the present invention;

[0031] Figure 10 It is a schematic structural diagram of the cooperative connection between the inclined guide plate and the auxiliary movable plate in the present invention.

[0032] Explanation of reference numerals:

[0033] 1, U-shaped chute frame; 2, sprocket; 3, annular chain; 4, scraper member; 5, right-angle guide plate; 6, feed guide plate; 7, inclined guide plate; 8, auxiliary baffle; 9, auxiliary movable plate; 10, friction wheel; 11, convex plate; 12, ejector rod; 13, impact rod; 14, mounting block; 15, mounting cavity; 16, rack; 17, guide sleeve; 18, elastic telescopic connecting rod; 19, return spring; 20, missing gear; 21, second steering bevel gear; 22, first steering bevel gear; 23, spherical end body; 24, annular groove; 25, bending spring. Detailed implementation manners

[0034] The following describes the detailed implementation manners of the present invention in detail, but it should be understood that the protection scope of the present invention is not limited by the detailed implementation manners.

[0035] As Figures 1 - 10As shown, a scraper conveyor for coal mines is used to transfer the coal transported by the scraper conveyor in the underground coal mine to the belt conveyor and transport it to the ground to assist in coal mine exploitation and transportation. The conveyor includes a U-shaped chute frame 1, sprockets 2, endless chains 3, scraper parts 4, and a material guide plate 6. The U-shaped chute frame 1 is welded by steel plates and can include a straight section and a bent section, which are made according to actual terrain requirements to facilitate the transfer and lifting of coal. The material guide plate 6 is fixedly arranged in the U-shaped chute frame 1, and there is a certain distance between the material guide plate 6 and the inner bottom of the U-shaped chute frame 1. The material guide plate 6 is used to support the coal, and the scraper parts 4 can move along the material guide plate 6 to realize the pushing of the coal. There are two sets of sprockets 2, which are respectively rotatably arranged at both ends of the U-shaped chute frame 1 through rotating shafts, and one of the sets of sprockets 2 is driven to rotate by a motor. Each set of sprockets 2 includes two coaxially arranged wheel bodies, and the two wheel bodies are respectively distributed close to the inner edge of the U-shaped chute frame 1. The endless chain 3 is arranged between the two sets of sprockets 2. It should be noted that there are two endless chains 3, and each endless chain 3 is arranged between the corresponding two wheel bodies. Since the wheel bodies are close to the inner edge position of the U-shaped chute frame 1, the endless chain 3 is also close to the edge position. In addition, a chain tensioning device can also be arranged on the conveyor to adjust the tension of the endless chain 3 to ensure that the endless chain 3 effectively drives the scraper parts 4 to operate. There are multiple scraper parts 4, which are equidistantly distributed along the endless chain 3. The two ends of each scraper part 4 are respectively fixedly connected to the corresponding side of the endless chain 3 through metal parts, and the specific fixed connection method can be selected according to actual needs. The scraper parts 4 move along the material guide plate 6. The conveyor also includes an anti-jamming guiding mechanism, which is used to restrict the running track of the endless chain 3. The anti-jamming guiding mechanism includes a right-angle guiding plate 5 and a pushing mechanism. The right-angle guiding plate 5 is fixedly arranged on the material guide plate 6 and is distributed along the inside of the U-shaped chute frame 1. When there are two endless chains 3, two right-angle guiding plates 5 are also arranged and symmetrically distributed. Among them, the cross-section of the right-angle guiding plate 5 is L-shaped, and the endless chain 3 passes through the right-angle guiding plate 5. The right-angle guiding plate 5 restricts the movement track of the endless chain 3 and protects the endless chain 3 at the same time, reducing the contact between the coal and the endless chain 3. There are multiple sets of pushing mechanisms, which are equidistantly distributed along the inside of the right-angle guiding plate 5. Each set of pushing mechanisms includes an elastic impact part and a friction wheel 10 that cooperates with the endless chain 3. The friction wheel 10 rotates by the frictional action of the running endless chain 3. There is a transmission mechanism between the friction wheel 10 and the elastic impact part, and the transmission mechanism is used to convert the rotational movement of the friction wheel 10 into a linear movement and drive the elastic impact part to reciprocate, so as to push out or break the coal blocks stuck in the right-angle guiding plate 5 and reduce wear.

[0036] It should be noted that, in order to facilitate the effective transmission of the endless chain 3, the sprocket 2 can also be set as Figure 9 shown, that is, an annular groove 24 is opened on the outer wall of the sprocket 2 to restrict the endless chain 3.

[0037] In some specific embodiments, referring to Figure 4 as shown, each set of pushing mechanisms further includes a mounting block 14 and a mounting cavity 15. The mounting block 14 is arranged at an upper position on the inner side of the right-angle guide plate 5. The friction wheel 10 is rotatably arranged on one side of the mounting block 14 away from the center of the U-shaped chute frame 1 through a rotating shaft. The mounting cavity 15 is opened in the mounting block 14. The transmission mechanism is arranged in the mounting cavity 15. The elastic impact member is arranged on one side of the mounting block 14 close to the center of the U-shaped chute frame 1, and one end of the elastic impact member penetrates into the mounting cavity 15. It should be noted that the shape and position of the mounting cavity 15 shown in the figure are for facilitating a clear view of the specific structure of the transmission mechanism arranged inside. Its two sides can also be completely enclosed with a hollow interior, as long as an opening of a certain size is provided at the bottom to facilitate the exposure of the elastic impact member, reducing the contact of coal material with the transmission mechanism and avoiding affecting the normal transmission of the transmission mechanism.

[0038] In some specific embodiments, referring to Figure 5 and Figure 6 as shown, the transmission mechanism includes a steering transmission gear mechanism, a missing gear 20, and a rack 16. The friction wheel 10 drives the missing gear 20 to rotate through the steering transmission gear mechanism. The rack 16 is fixedly connected to the elastic impact member and is engaged with the missing gear 20.

[0039] Among them, the steering transmission gear mechanism includes a first steering bevel gear 22 and a second steering bevel gear 21. The first steering bevel gear 22 is coaxially and fixedly connected to the friction wheel 10. The second steering bevel gear 21 is rotatably connected to one side inside the mounting cavity 15 through a rotating shaft, and the second steering bevel gear 21 is engaged with the first steering bevel gear 22, and their connecting shafts are perpendicular to each other. The missing gear 20 is coaxially and fixedly connected to the second steering bevel gear 21.

[0040] When the friction wheel 10 rotates under the action of the running endless chain 3, it drives the first steering bevel gear 22 to rotate. The first steering bevel gear 22 then drives the second steering bevel gear 21 to rotate. The second steering bevel gear 21 then drives the missing gear 20 to rotate. Since the distributed effective teeth of the missing gear 20 are discontinuous, it can intermittently drive the rack 16 to move.

[0041] In some specific embodiments, as Figure 5 shown, the elastic impact member includes an impact rod 13 and a return spring 19. A guide sleeve 17 is fixedly connected to the top inside the mounting cavity 15 through a bracket. One end of the impact rod 13 slides through the guide sleeve 17, and the end of the impact rod 13 is connected to the guide sleeve 17 through a stretchable return spring 19. The other end of the impact rod 13 passes out from the bottom of the mounting block 14, and the impact rod 13 is inclined towards the guide plate 6. The rack 16 is arranged parallel to the impact rod 13, and one end of the rack 16 is fixedly connected to the impact rod 13. The bottom end of the impact rod 13 is a tip.

[0042] It should be noted that when the return spring 19 is in its original state, the impact end of the impact rod 13 is exposed outside the bottom of the mounting block 14 and is higher than the metal part connecting the scraping member 4 and the annular chain 3, so as to avoid movement obstruction.

[0043] When transporting coal material in the direction of the arrow in Figure 1 the missing gear 20 rotates under the drive of the friction wheel 10. Whenever the effective tooth body part of the missing gear 20 rotates to the position where the rack 16 is located, it meshes with the rack 16, and then pushes the rack 16 to move obliquely upward. The rack 16 drives the impact rod 13 to move synchronously and retracts into the installation cavity 15, causing the return spring 19 to stretch and generate a return spring force. When the effective tooth body part of the missing gear 20 disengages from the rack 16, the impact rod 13 is ejected obliquely downward under the action of the return spring force of the return spring 19, so as to facilitate pushing the large coal pieces flowing under the right-angle guide plate 5. At the same time, it can also rely on the ejection impact movement to break the coal pieces to a certain extent, avoiding them being stuck between the annular chain 3 and the right-angle guide plate 5, increasing wear, affecting the operation and service life of the annular chain 3, and with the continuous rotation of the friction wheel 10, the impact rod 13 can repeatedly eject and impact.

[0044] It should be noted that in order to facilitate the reciprocating linear movement of the impact rod 13, the corresponding position at the top of the installation cavity 15 can be opened as a perforation to expand the movement space of the impact rod 13.

[0045] In some other specific implementation schemes, in order to facilitate the effective fitting of the friction wheel 10 to the annular chain 3 and adapt to the floating during the operation of the annular chain 3, elastic telescopic connecting rods 18 are provided on both sides of the top of the mounting block 14, and the mounting block 14 is connected to the inner top of the right-angle guide plate 5 through the elastic telescopic connecting rods 18. The elastic telescopic connecting rod 18 includes a telescopic rod body and a spring sleeved outside the telescopic rod body. One end of the spring can be fixed on the right-angle guide plate 5, and the other end is fixed on the mounting block 14, and the whole elastic telescopic connecting rod 18 can be compressed. When there is a certain degree of up and down floating or jitter during the operation of the annular chain 3, the elastic telescopic connecting rod 18 can rely on elastic telescoping to keep the friction wheel 10 in contact with the annular chain 3.

[0046] In still some other specific implementation schemes, on the premise of installing the elastic telescopic connecting rod 18, there is a gap between the mounting block 14 and the inner top of the right-angle guide plate 5. In order to prevent coal material from entering the gap, an auxiliary baffle 8 is fixedly connected to one side of the top of the right-angle guide plate 5 close to the guide plate 6, and the auxiliary baffle 8 shields the gap between the top of the right-angle guide plate 5 and the mounting block 14.

[0047] In some specific implementation schemes, referring to Figure 3As shown, an inclined guide plate 7 is fixedly connected between the bottom of the right-angle guide plate 5 and the guide plate 6. The inclined guide plate 7 can guide the coal entering the right-angle guide plate 5 to fall back onto the guide plate 6, and can also prevent the coal from contacting the ring chain 3 to a certain extent.

[0048] In other specific embodiments, reference Figure 10 As shown, an auxiliary movable plate 9 is arranged on the inclined guide plate 7, one side of the auxiliary movable plate 9 is movably connected to the lower side of the inclined guide plate 7 by a hinge, and the other side is separated from the higher side of the inclined guide plate 7 to form a certain angle, and a compressible bending spring 25 is connected between the auxiliary movable plate 9 and the inclined guide plate 7, and a push rod 12 is fixedly connected to the side of each friction wheel 10 away from the scraper member 4, and the push rod 12 is vertically distributed with the rotating shaft of the friction wheel 10, and the end of the push rod 12 is a spherical end body 23, which cooperates with the auxiliary movable plate 9, and during the rotation of the friction wheel 10, the push rod 12 surrounds the friction wheel 10. The rotating shaft of the wiping wheel 10 rotates. Whenever the end of the push rod 12 rotates to the tilted position of the auxiliary movable plate 9, the auxiliary movable plate 9 can be squeezed and pushed to deflect relative to the inclined guide plate 7, and the bending spring 25 can be compressed. When the push rod 12 rotates to a position away from the auxiliary movable plate 9, the auxiliary movable plate 9 can be rotated and reset by relying on the rebound force of the bending spring 25. This can be repeated to achieve the reciprocating swing of the auxiliary movable plate 9 relative to the inclined guide plate 7, which is convenient for promoting the coal to slide out from the bottom of the right-angle guide plate 5, and also convenient for the large piece of coal hit by the auxiliary impact rod 13 to break away, thereby improving the anti-stuck effect.

[0049] It should be noted that, in order to avoid hindering the push rod 12 from rotating around the rotation axis of the friction wheel 10, there is a large enough space around the rotation axis where the friction wheel 10 is connected to allow the push rod 12 to move in a circular motion.

[0050] In addition, it should be noted that when the elastic telescopic connecting rod 18 is compressed to the limit position, the end of the rotating top rod 12 can still squeeze the auxiliary movable plate 9.

[0051] In some specific implementation schemes, in order to ensure that the friction wheel 10 can rotate during the operation of the endless chain 3, a plurality of convex plates 11 are fixedly connected to each friction wheel 10 at equal intervals in the circumferential direction.

[0052] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0053] The scraper transfer machine of the present invention is installed between the scraper conveyor for transporting coal and the belt conveyor device at a higher position. The coal transported by the scraper conveyor falls on the guide plate 6 in the scraper transfer machine, and the distributed scraper members 4 are driven by the endless chain 3 to move along the guide plate 6, thereby pushing the coal to the belt conveyor device for transportation.

[0054] The running endless chain 3 relies on the right-angle guide plate 5 to realize the motion trajectory constraint and protection, and because the endless chain 3 abuts against the bottom of the friction wheel 10, it can drive the distributed friction wheel 10 to rotate;

[0055] During the rotation of the friction wheel 10, it drives the first steering bevel gear 22 to rotate, and the first steering bevel gear 22 drives the second steering bevel gear 21 to rotate, and the second steering bevel gear 21 drives the missing gear 20 to rotate;

[0056] Whenever the effective tooth body part of the missing gear 20 rotates to the position of the rack 16, it meshes with the rack 16 and then pushes the rack 16 to move diagonally upward. The rack 16 drives the impact rod 13 to move synchronously and is received into the installation cavity 15, causing the reset spring 19 to stretch and generate a rebound force. When the effective tooth body part of the missing gear 20 is separated from the rack 16, the impact rod 13 is ejected diagonally downward under the action of the rebound force of the reset spring 19, thereby facilitating the pushing of large pieces of coal that flow to the bottom of the right-angle guide plate 5. At the same time, the coal blocks can also be crushed to a certain extent by the ejection and impact movement to avoid being stuck between the ring chain 3 and the right-angle guide plate 5, which increases wear and affects the operation and service life of the ring chain 3. As the friction wheel 10 continues to rotate, the impact rod 13 can be repeatedly ejected and impacted.

[0057] At the same time, since the inclined guide plate 7 is arranged at the bottom of the right-angle guide plate 5, the inclined guide plate 7 can guide the coal entering the right-angle guide plate 5 to fall back onto the guide plate 6, and at the same time, it can also prevent the coal from contacting the endless chain 3 to a certain extent;

[0058] And during the rotation of the friction wheel 10, the push rod 12 rotates around the rotating shaft of the friction wheel 10. Whenever the end of the push rod 12 rotates to the tilted position of the auxiliary movable plate 9, the auxiliary movable plate 9 can be squeezed and pushed to deflect relative to the inclined guide plate 7, and the bending spring 25 can be compressed. When the push rod 12 rotates to a position away from the auxiliary movable plate 9, the auxiliary movable plate 9 can rely on the rebound force of the bending spring 25 to rotate and reset. This can be repeated to achieve the reciprocating swing of the auxiliary movable plate 9 relative to the inclined guide plate 7, which is convenient for promoting the coal to slide out from the bottom of the right-angle guide plate 5, and also convenient for the large pieces of coal hit by the auxiliary impact rod 13 to break away, thereby improving the anti-stuck effect.

[0059] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A scraper transfer machine for coal mines, comprising a U-shaped chute frame (1), a sprocket (2), an endless chain (3), a scraper member (4) and a guide plate (6), wherein the guide plate (6) is fixedly arranged in the U-shaped chute frame (1), the endless chain (3) is cooperatively connected with the sprocket (2), the scraper member (4) is provided with a plurality of pieces and is evenly distributed along the endless chain (3), characterized in that: Also includes an anti-stuck guide mechanism; The anti-stuck guide mechanism comprises a right-angle guide plate (5) and a push-up mechanism. The right-angle guide plate (5) is fixedly arranged on the guide plate (6) and is distributed along the inside of the U-shaped chute frame (1). The ring chain (3) passes through the right-angle guide plate (5). The push-up mechanism is provided in multiple groups and is distributed equidistantly along the inner side of the right-angle guide plate (5). Each group of the push-up mechanism comprises an elastic impact member and a friction wheel (10) matched with the ring chain (3). The friction wheel (10) rotates by the friction effect of the running ring chain (3). A transmission mechanism is provided between the friction wheel (10) and the elastic impact member. The transmission mechanism is used to convert the rotational motion of the friction wheel (10) into linear motion and drive the elastic impact member to reciprocate.

2. A scraper transfer machine for coal mines according to claim 1, characterized in that: Each group of the ejection mechanisms further comprises a mounting block (14) and a mounting cavity (15); the mounting block (14) is arranged at an upper position on the inner side of the right-angle guide plate (5); the friction wheel (10) is rotatably arranged on a side of the mounting block (14) away from the center position of the U-shaped chute frame (1); the mounting cavity (15) is arranged in the mounting block (14); the transmission mechanism is arranged in the mounting cavity (15); the elastic impact member is arranged on a side of the mounting block (14) close to the center position of the U-shaped chute frame (1), and one end of the elastic impact member penetrates into the mounting cavity (15).

3. A scraper transfer machine for coal mines according to claim 2, characterized in that: The transmission mechanism comprises a steering transmission gear mechanism, a missing gear (20) and a rack (16); the friction wheel (10) drives the missing gear (20) to rotate through the steering transmission gear mechanism; the rack (16) is fixedly connected to the elastic impact member, and the rack (16) cooperates with the missing gear (20).

4. A scraper transfer machine for coal mines according to claim 3, characterized in that: The steering transmission gear mechanism comprises a first steering bevel gear (22) and a second steering bevel gear (21); the first steering bevel gear (22) is coaxially fixedly connected to the friction wheel (10); the second steering bevel gear (21) is rotatably connected to one side of the interior of the mounting cavity (15); the second steering bevel gear (21) is meshed with the first steering bevel gear (22); and the missing gear (20) is coaxially fixedly connected to the second steering bevel gear (21).

5. A scraper transfer machine for coal mines according to claim 3, characterized in that: The elastic impact member comprises an impact rod (13) and a return spring (19); a guide sleeve (17) is fixedly connected to the top of the installation cavity (15); one end of the impact rod (13) slides through the guide sleeve (17), and the end of the impact rod (13) is connected to the guide sleeve (17) through the return spring (19); the other end of the impact rod (13) passes through the bottom of the installation block (14), and the impact rod (13) is inclined toward the guide plate (6); the rack (16) is fixedly connected to the impact rod (13).

6. A scraper transfer machine for coal mines according to claim 2, characterized in that: Both sides of the top of the installation block (14) are provided with elastic telescopic connecting rods (18), and the installation block (14) is connected to the inner top of the right-angle guide plate (5) through the elastic telescopic connecting rods (18).

7. A scraper transfer machine for coal mines according to claim 6, characterized in that: An auxiliary baffle (8) is fixedly connected to one side of the top of the right-angle guide plate (5) close to the material guide plate (6).

8. A scraper transfer machine for coal mines according to claim 1, characterized in that: An inclined guide plate (7) is fixedly connected between the bottom of the right-angle guide plate (5) and the material guide plate (6).

9. A scraper transfer machine for coal mines according to claim 8, characterized in that: An auxiliary movable plate (9) is provided on the inclined guide plate (7), one side of the auxiliary movable plate (9) is movably connected to the lower side of the inclined guide plate (7) through a hinge, and the other side is separated from the higher side of the inclined guide plate (7), a bending spring (25) is connected between the auxiliary movable plate (9) and the inclined guide plate (7), and a push rod (12) is fixedly connected to one side of each friction wheel (10) away from the scraper member (4), and the push rod (12) cooperates with the auxiliary movable plate (9).

10. A scraper transfer machine for coal mines according to claim 1, characterized in that: Each friction wheel (10) is fixedly connected with a plurality of convex plates (11) at equal intervals in the circumferential direction.

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