Shaft protection device of mine hoist

Abstract

The invention discloses a shaft protection device of a mine hoist, which relates to the technical field of shaft protection of hoists and comprises a hoist and a shaft. A sliding rail is arranged in the shaft, and the sliding rail and the material carrying assembly are installed in a matched mode. The material carrying assembly comprises a material box. A moving plate is arranged at the bottom in the material box; multiple pressing sleeves are arranged at the bottom of the moving plate; a supporting rod is arranged between the pressing sleeve and the inner side of the material box bottom plate; the surface of the supporting rod is sleeved with a first spring. By adding materials, a movable plate drives one end of a pressing rod to move downwards through an L-shaped pull rod, the other end of the pressing rod rotates upwards, a protruding column drives a third connecting shaft to rotate through a shifting frame, when a double-round-head plate rotates in a vertical state, the third connecting shaft and the double-round-head plate are fixedly installed, and the third connecting shaft drives a turning plate to rotate synchronously; the inclined turning plate is rotated to the horizontal state, the top of the material box is effectively blocked, and therefore the situation that materials are continuously added into the material box is avoided, and the overall operation state and stability of the elevator are guaranteed.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of hoist shaft protection, and more specifically to a shaft protection device for a mine hoist. Background Art

[0002] A mine hoist is a vertical transportation device in a mine. By rotating the hoist forward and backward, the transportation container can be moved upward or downward. During the operation of the hoist, the load of the container will affect the working efficiency of the hoist. Therefore, during the operation, the load in the container needs to be maintained within the working power of the hoist.

[0003] The existing detection devices for the overload prevention structure of hoppers are easily interfered by factors such as dust, humidity, and vibration in the mine environment, resulting in misjudgment of the hopper load situation. For example, dust may cover the surface of the pressure sensor, making it unable to accurately measure the pressure, thus wrongly sending overload or non-overload signals. Even when overload is detected, the existing control devices have insufficient precision when adjusting the hopper feed rate or lifting speed, making it difficult to achieve precise fine-tuning, and over-adjustment or under-adjustment may occur, affecting the overall operation efficiency and stability of the hoist. During the operation of the hoist, the overload of the hopper causes the hoist to bear a large load, affecting the overall operation efficiency and stability of the hoist.

[0004] After retrieval, Chinese Patent Publication No. CN200620098600.7 discloses an overload prevention device for a hoist skip. A magnetic switch is installed on the headframe at the ore loading position of the hoist skip, and a magnet is fixed on the side of the skip, which is matched with the magnetic switch. The normally open contact of the magnetic switch is connected to the control circuit of the metering hopper cylinder.

[0005] When the overload prevention device in the above patent prevents overload of the hoist skip, it is achieved through the cooperation between the magnetic switch installed inside the headframe and the magnet on the hoist skip. During use, it can only prevent overload during the unloading of the hoist skip. When loading, the self-weight of the material plus the hoist skip causes the position between the magnet and the magnetic switch to shift. When the loaded material exceeds the bearing range of the hoist skip, it will accelerate the damage of the hoist skip. Moreover, when the hoist skip is overweight, the load of the hoist increases, which will affect the overall operation efficiency and stability of the hoist during long-term operation, reducing the service life of the hoist. Summary of the Invention

[0006] The object of the present invention is to provide a shaft protection device for a mine hoist. In this device, a moving plate is arranged at the bottom of the feed box. When the material presses down the moving plate, the bottom of the moving plate drives the L-shaped pull rod to compress the first spring, so that the top of the L-shaped pull rod pulls down the pressure rod. Through the pressure rod, the first coupling shaft tilts upward. During the upward tilting process of the first coupling shaft, the first coupling shaft pulls the movable plate upward through the second spring, so that the dial on the movable plate cooperates with the convex column, thereby driving the third coupling shaft to drive the flap to rotate upward. When the material is added to a certain amount, the double-round head plate rotates from an inclined state to a vertical state, thereby rotating the flap to a horizontal state. Through the cooperation of the two flaps, the top of the feed box is blocked, effectively avoiding the overload of the feed box, thus ensuring the working efficiency and stability of the hoist; to solve the problems in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A shaft protection device for a mine hoist, comprising a hoist and a shaft; it is characterized in that: a slide rail is arranged inside the shaft, and the slide rail is cooperatively installed with a loading component; the loading component includes a feed box; a moving plate is arranged at the inner bottom of the feed box; a plurality of pressure sleeves are arranged at the bottom of the moving plate; a support rod is arranged between the pressure sleeve and the inner side of the feed box bottom plate; a first spring is sleeved on the surface of the support rod; through the expansion and contraction of the first spring, the up and down movement of the moving plate is realized, so as to realize the up and down pulling of the L-shaped pull rod by the moving plate on the pressure rod.

[0009] An overload protection component is cooperatively installed on the inner top of the feed box; the overload protection component includes two groups of symmetric double-round head plates; one end outside of each group of double-round head plates is movably installed with a movable plate through a second coupling shaft; the movable plate is arc-shaped, and a dial is integrally arranged on the inner side of the movable plate; the inside of the dial is hollow; when the movable plate is driven to move upward by the second spring, the dial will insert into the convex column, thereby driving the third coupling shaft to rotate synchronously through the convex column, so as to rotate the flap to a horizontal position.

[0010] The end of the double-round head plate far from the second coupling shaft is connected to the end of the movable plate far from the second coupling shaft through a first coupling shaft and a second spring; the second spring is respectively connected to the first coupling shaft and the end of the movable plate; through the rotation of the first coupling shaft, tilting upward, the first coupling shaft pulls the movable plate to rotate along the second coupling shaft through the second spring.

[0011] As a further technical solution of the present invention, the double-round head plate is movably installed with the first connecting shaft and the second connecting shaft; a third connecting shaft is arranged between the first connecting shaft and the second connecting shaft; the third connecting shaft is fixedly installed with the double-round head plate; a pressing rod is arranged on the side of the double-round head plate away from the movable plate; one end of the pressing rod is fixedly installed with the first connecting shaft; a flap is fixedly installed on the third connecting shaft; when the pressing rod is pressed down, the dial on the movable plate drives the third connecting shaft to rotate synchronously through the raised column, and the flap is fixedly installed with the third connecting shaft, so as to realize turning the flap to the horizontal position; thus, through the cooperation of the two flaps, the top of the material box is blocked, effectively avoiding the overload of the material box during material addition;

[0012] As a further technical solution of the present invention, a second roller is arranged at the end of the third connecting shaft; a raised column is integrally arranged at the bottom of the third connecting shaft between the second roller and the double-round head plate; the raised column is connected with the dial in a matching manner; a third roller and a first roller are respectively arranged on the sides of the first connecting shaft and the second connecting shaft away from the double-round head plate; when the double-round head plate rotates, the rollers on the connecting shaft rotate along the arc-shaped groove, thus ensuring the stability during rotation and avoiding reverse rotation;

[0013] As a further technical solution of the present invention, a flap is fixedly installed on the third connecting shaft between the two double-round head plates; the flap has the same inclination angle as the raised column; this effectively ensures the consistency of the flipping angles of the flap and the raised column, avoiding the situation of gaps between the two flaps;

[0014] As a further technical solution of the present invention, the end of the pressing rod away from the first connecting shaft is movably installed with a connecting rod assembly; the connecting rod assembly includes an L-shaped pull rod; the top of the L-shaped pull rod is movably installed with the pressing rod through a connecting pin; the other end of the L-shaped pull rod penetrates through the side wall of the material box and is fixedly installed at the bottom of the moving plate; a stop block is also fixedly installed inside the L-shaped pull rod; when the moving plate is pressed down by the material, it will move downward. At this time, the moving plate drives the L-shaped pull rod to move downward, and the stop block on the L-shaped pull rod effectively blocks the gap of the rectangular groove, avoiding the leakage of the material added in the material box from the rectangular groove;

[0015] As a further technical solution of the present invention, first arc grooves and second arc grooves are provided on the side walls on both sides of the material box; wherein, the first arc grooves are fitted and installed with first rollers; the second arc grooves are fitted and installed with third rollers; a round hole groove for facilitating the fitting and installation of second rollers is provided between the first arc grooves and the second arc grooves; the centers of one ends of the first arc grooves and the second arc grooves are on the same axis; when the flap on the third coaxial shaft is rotated by driving the convex column through the dialing frame, the third rollers and the first rollers at the ends of the first coaxial shaft and the second coaxial shaft at both ends of the double round head plate respectively rotate along the second arc groove and the first arc groove, thereby ensuring the stability during rotation; the centers of one ends of the first arc grooves and the second arc grooves are on the same axis, ensuring that the double round head plate will not rotate backward after rotating to the vertical state, thereby ensuring the cooperation between the two flaps;

[0016] As a further technical solution of the present invention, rollers are also fitted and installed on the side walls at both ends of the material box through pedestal bearings, and the rollers are slidably installed with the tracks inside the wellbore; through the cooperation of the rollers and the tracks inside the wellbore, the stability of the hoist when driving the loading component to move up and down is effectively ensured, and the situation that the loading component shakes inside the wellbore is avoided;

[0017] As a further technical solution of the present invention, the top of the loading component is fitted and installed with a hoist through a steel wire rope and a hook; the hoist is fixedly installed on one side of the wellbore; the hoist is cooperated with the material box through the steel wire rope and the hook, and the loading component moves up and down along the wellbore through the winding and unwinding of the hoist;

[0018] As a further technical solution of the present invention, a discharge port is provided on one side of the material box, and a material door is hinged to the bottom of the discharge port. Chute grooves are provided at the positions of the material box on both sides of the discharge port, and a first connecting rod is installed inside the chute grooves through sliders. The bottom of the first connecting rod is installed with a second connecting rod through a rotating shaft, and the bottom of the second connecting rod is connected to both sides of the material door through a rotating shaft.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In the present invention, during use, through the addition of materials, the materials press down the moving plate, and the moving plate drives the L-shaped pull rod to move down along the rectangular groove provided on the side wall of the material box. The top of the L-shaped pull rod pulls down the pressure rod, and one end of the pressure rod away from the L-shaped pull rod is fixedly installed with the first coaxial shaft, realizing that the first coaxial shaft pulls up the movable plate through the second spring;

[0021] 2. In the present invention, when the movable plate moves upward, the movable plate moves upward along the second coaxial shaft, so that the dialing frame on the movable plate cooperates with the convex column. As the movable plate moves, the dialing frame synchronously drives the convex column to rotate upward. The convex column is fixedly installed with the third coaxial shaft, thereby effectively realizing the rotation of the flap on the third coaxial shaft;

[0022] 3. In the process of adding materials in the present invention, during the downward movement of the moving plate and the L-shaped pull rod, the rectangular groove on the side wall of the material box is effectively blocked by the stopper fixedly installed on the L-shaped pull rod, avoiding the leakage of materials.

[0023] 4. In the present invention, as the materials in the material box increase, the L-shaped pull rod drives the movement of the pressure rod. Through the movable plate, the double-round head plate rotates from an inclined state to a vertical state. During the rotation of the double-round head plate, the third roller and the first roller rotate along the second arc groove and the first arc groove respectively, effectively ensuring the stability during the rotation. When the double-round head plate rotates to the vertical state, the flap fixedly installed on the third coupling shaft rotates to the horizontal state. Thus, through the cooperation between the two flaps, the top of the material box is blocked, preventing the continuous addition of materials into the material box and effectively avoiding the overload of the material box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0025] Figure 2 is a three-dimensional structural schematic diagram of the material loading component in the present invention.

[0026] Figure 3 is in the present invention Figure 2 Another perspective structural schematic diagram.

[0027] Figure 4 is in the present invention Figure 3 Internal structural schematic diagram.

[0028] Figure 5 is in the present invention Figure 4 Another perspective structural schematic diagram.

[0029] Figure 6 is in the present invention Figure 4 Exploded schematic diagram.

[0030] Figure 7 is in the present invention Figure 6 Assembly schematic diagram of the connecting rod assembly and the overload prevention assembly.

[0031] Figure 8 is in the present invention Figure 7 Three-dimensional structural schematic diagram of the overload prevention assembly.

[0032] Figure 9 is in the present invention Figure 7 Partial structural assembly schematic diagram.

[0033] Figure 10 is in the present invention Figure 8 Bottom structural bottom view.

[0034] Figure 11 In the present invention Figure 7 is the enlarged view of the local structure at position A in

[0035] Figure 12 is the present invention Figure 9 is the enlarged view of the local structure at position B in

[0036] In the figure: 1 - hoist, 2 - shaft, 3 - loading component, 30 - material box, 31 - first arc groove, 32 - second arc groove, 33 - roller, 34 - rectangular groove, 35 - first spring, 36 - support rod, 37 - pressure sleeve, 38 - moving plate, 39 - material door, 310 - discharge port, 311 - chute, 312 - first connecting rod, 313 - second connecting rod, 4 - connecting rod assembly, 40 - L-shaped pull rod, 41 - stop block, 42 - connecting pin, 5 - anti-overload component, 50 - flap, 51 - pressure rod, 52 - double round head plate, 53 - second spring, 54 - first roller, 55 - second roller, 56 - third roller, 57 - movable plate, 58 - dialing frame, 59 - convex column, 510 - first coupling shaft, 511 - second coupling shaft, 512 - third coupling shaft. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figure 1-10 , in the embodiment of the present invention, a shaft protection device for a mine hoist includes a hoist 1 and a shaft 2; a slide rail is arranged inside the shaft 2, and the slide rail is cooperatively installed with a loading component 3; the loading component 3 includes a material box 30; a moving plate 38 is arranged at the bottom inside the material box 30; a plurality of pressure sleeves 37 are arranged at the bottom of the moving plate 38; a support rod 36 is arranged between the pressure sleeve 37 and the inner side of the bottom plate of the material box 30; a first spring 35 is sleeved on the surface of the support rod 36;

[0039] An anti-overload component 5 is cooperatively installed at the top inside the material box 30; the anti-overload component 5 includes two groups of symmetric double round head plates 52; at one end outside of each group of the double round head plates 52, a movable plate 57 is movably installed through a second coupling shaft 511; the movable plate 57 is arc-shaped, and a dialing frame 58 is integrally arranged on the inner side of the movable plate 57; the inside of the dialing frame 58 is hollow;

[0040] One end of the double-round head plate 52 away from the second coupling shaft 511 is connected to one end of the movable plate 57 away from the second coupling shaft 511 through the first coupling shaft 510 and the second spring 53; the second spring 53 is respectively connected to the first coupling shaft 510 and the end of the movable plate 57;

[0041] The double-round head plate 52 is movably installed with the first coupling shaft 510 and the second coupling shaft 511; a third coupling shaft 512 is arranged between the first coupling shaft 510 and the second coupling shaft 511; the third coupling shaft 512 is fixedly installed with the double-round head plate 52; one side of the double-round head plate 52 away from the movable plate 57 is provided with a pressure rod 51; one end of the pressure rod 51 is fixedly installed with the first coupling shaft 510; a flap 50 is fixedly installed on the third coupling shaft 512.

[0042] By adopting the above technical solution, during use, the material box 30 is placed inside the wellbore 2, and through the cooperation between the rollers 33 and the guide rails, the stability of the material box 30 during the operation of the hoist 1 is ensured. When the material box 30 moves to the filling position, materials are added into the material box 30. As the materials are added into the material box 30, the materials press down the moving plate 38, so that the pressure sleeve 37 at the bottom of the moving plate 38 compresses the first spring 35 sleeved on the strut 36, realizing that the moving plate 38 drives the L-shaped pull rod 40 to move downward;

[0043] In this embodiment, a second roller 55 is arranged at the end of the third coupling shaft 512; a convex column 59 is integrally arranged at the bottom of the third coupling shaft 512 between the second roller 55 and the double-round head plate 52; the convex column 59 is connected with the dialing frame 58 in a matching manner; third rollers 56 and first rollers 54 are respectively arranged on one side of the first coupling shaft 510 and the second coupling shaft 511 away from the double-round head plate 52;

[0044] In this embodiment, a flap 51 is fixedly installed on the third coupling shaft 512 between the two double-round head plates 52; the flap 51 has the same inclination angle as the convex column 59;

[0045] By adopting the above technical solution, during the downward movement of the L-shaped pull rod 40, the block 41 installed on the L-shaped pull rod 40 effectively blocks the rectangular groove 34 on the side wall of the material box 30, avoiding the leakage of the added materials from the rectangular groove 34. As the L-shaped pull rod 40 descends, the connecting pin 42 at the top of the L-shaped pull rod 40 pulls one end of the pressure rod 51, so that the other end of the pressure rod 51 drives the first coupling shaft 510 to rotate upward;

[0046] Further, when the first coupling shaft 510 rotates upward, the first coupling shaft 510 drives one end of the movable plate 57 to move upward through the second spring 53. During the movement of the movable plate 57, the dial 58 on the movable plate 57 effectively cooperates with the convex column 59 provided on the third coupling shaft 512, so as to drive the third coupling shaft 512 to rotate upward through the movable plate 57;

[0047] In this embodiment, one end of the pressure rod 51 far from the first coupling shaft 510 is movably installed with the connecting rod assembly 4; the connecting rod assembly 4 includes an L-shaped pull rod 40; the top of the L-shaped pull rod 40 is movably installed with the pressure rod 51 through a connecting pin 42; the other end of the L-shaped pull rod 40 penetrates through the side wall of the material box 30 and is fixedly installed at the bottom of the moving plate 38; a stop block 41 is also fixedly installed inside the L-shaped pull rod 40;

[0048] The side walls on both sides of the material box 30 are provided with a first arc groove 31 and a second arc groove 32; among them; the first arc groove 31 is fitted and installed with the first roller 54; the second arc groove 32 is fitted and installed with the third roller 56; a round hole groove for fitting and installing the second roller 55 is provided between the first arc groove 31 and the second arc groove 32; the centers of one ends of the first arc groove 31 and the second arc groove 32 are on the same axis;

[0049] By adopting the above technical solution, when the movable plate 57 drives the third coupling shaft 512 to rotate, the third coupling shaft 512 is fixedly installed with the double-round head plate 52, so as to realize the rotation of the first coupling shaft 510 and the second coupling shaft 511 at both ends of the double-round head plate 52, and the third roller 56 and the first roller 54 rotate along the second arc groove 32 and the first arc groove 31 provided on the side wall of the material box 30, so as to realize the rotation of the double-round head plate 52 from an inclined state to a vertical state;

[0050] In this embodiment; the side walls at both ends of the material box 30 are also fitted and installed with rollers 33 through pedestal bearings, and the rollers 33 are slidably installed with the tracks inside the shaft 2;

[0051] The top of the material loading assembly 3 is fitted and installed with a hoist 1 through a steel wire rope and a hook; the hoist 1 is fixedly installed on one side of the shaft 2;

[0052] By adopting the above technical solution, when the double-round head plate 52 rotates to the vertical state, the third coupling shaft 512 is fixedly installed with the double-round head plate 52, so as to realize the synchronous rotation of the third coupling shaft 512 driving the flap 50, so as to rotate the inclined flap 50 to the horizontal state. Through the cooperation between the two flaps 50, the top of the material box 30 is effectively blocked, so as to avoid continuously adding materials into the material box 30, so as to effectively avoid the overload of the material box 30 and ensure the overall operation state and stability of the hoist 1;

[0053] One side of the material box 30 is provided with a discharge port 310, and a material door 39 is hinged to the bottom of the discharge port 310. Chute grooves 311 are provided at the positions of the two sides of the discharge port 310 on the material box 30, and a first connecting rod 312 is installed inside the chute grooves 311 through sliders. The bottom of the first connecting rod 312 is installed with a second connecting rod 313 through a rotating shaft, and the bottom of the second connecting rod 313 is connected to both sides of the material door 39 through a rotating shaft.

[0054] The working principle of the present invention is as follows: When in use, the material box 30 is placed inside the wellbore 2. Through the cooperation between the rollers 33 and the guide rails, the stability of the material box 30 during the operation of the hoist 1 is ensured. When the material box 30 moves to the filling position, materials are added into the material box 30. As the materials are added into the material box 30, the materials press down the moving plate 38, causing the compression sleeve 37 at the bottom of the moving plate 38 to compress the first spring 35 sleeved on the support rod 36, realizing that the moving plate 38 drives the L-shaped pull rod 40 to move downward;

[0055] During the downward movement of the L-shaped pull rod 40, the block 41 installed on the L-shaped pull rod 40 effectively seals the rectangular groove 34 on the side wall of the material box 30, avoiding the leakage of the added materials from the rectangular groove 34. As the L-shaped pull rod 40 descends, the connecting pin 42 at the top of the L-shaped pull rod 40 pulls one end of the pressure rod 51, causing the other end of the pressure rod 51 to drive the first connecting shaft 510 to rotate upward;

[0056] When the first connecting shaft 510 rotates upward, the first connecting shaft 510 drives one end of the movable plate 57 to move upward through the second spring 53. During the movement of the movable plate 57, the dialing frame 58 on the movable plate 57 effectively cooperates with the protruding column 59 provided on the third connecting shaft 512, thereby realizing that the movable plate 57 drives the third connecting shaft 512 to rotate upward;

[0057] When the movable plate 57 drives the third connecting shaft 512 to rotate, the third connecting shaft 512 is fixedly installed with the double-round head plate 52, thereby realizing that the first connecting shaft 510 and the second connecting shaft 511 at both ends of the double-round head plate 52 drive the third roller 56 and the first roller 54 to rotate along the second arc groove 32 and the first arc groove 31 provided on the side wall of the material box 30, realizing the rotation of the double-round head plate 52 from an inclined state to a vertical state;

[0058] When the double-round head plate 52 rotates to the vertical state, the third connecting shaft 512 is fixedly installed with the double-round head plate 52, realizing that the third connecting shaft 512 drives the flap 50 to rotate synchronously, realizing the rotation of the inclined flap 50 to the horizontal state. Through the cooperation between the two flaps 50, the top of the material box 30 is effectively sealed, thereby avoiding the continuous addition of materials into the material box 30, effectively avoiding the overload of the material box 30, and ensuring the overall operation state and stability of the hoist 1;

[0059] After the material is lifted out, under the extrusion of the internal material, the material door 39 will be opened. At this time, the slider at the top of the first connecting rod 312 moves downward inside the chute 311. As the material continuously moves along the material door 39, the second connecting rod 313 rotates downward along the rotating shaft connected to the first connecting rod 312, causing the first connecting rod 312 to rotate following the material door 39 until the material door 39 is fully opened and the material is discharged.

[0060] On the other hand, when the material box 30 is recycled, due to the extrusion of the inner wall of the mine shaft, the material door 39 will retract to its original position. At this time, the movement relationship between each rotating shaft and the slider is opposite to that when the material door 39 is opened. Eventually, until the material door 39 is fully closed, and then the operation process of material lifting is repeated.

[0061] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0062] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A shaft protection device for a mine hoist, comprising a hoist (1) and a shaft (2); characterized in that: The shaft (2) is provided with a slide rail inside, and the slide rail is installed in cooperation with the material loading assembly (3); the material loading assembly (3) comprises a material box (30); a movable plate (38) is provided at the bottom of the material box (30); a plurality of pressing sleeves (37) are provided at the bottom of the movable plate (38); a support rod (36) is provided between the pressing sleeve (37) and the inner side of the bottom plate of the material box (30); a first spring (35) is provided on the surface of the support rod (36); An anti-overload component (5) is installed on the top of the inner side of the material box (30); the anti-overload component (5) includes two groups of symmetrical double round head plates (52); a movable plate (57) is movably installed on the outer side of one end of each group of double round head plates (52) through a second connecting shaft (511); the movable plate (57) is arranged in an arc shape, and a shifting frame (58) is integrally arranged on the inner side of the movable plate (57); the interior of the shifting frame (58) is hollow; One end of the double round head plate (52) away from the second connecting shaft (511) is connected to one end of the movable plate (57) away from the second connecting shaft (511) through the first connecting shaft (510) and the second spring (53); the second spring (53) is respectively connected to the end of the first connecting shaft (510) and the end of the movable plate (57).

2. A shaft protection device for a mine hoist according to claim 1, characterized in that: The double round head plate (52) is movably mounted on the first connecting shaft (510) and the second connecting shaft (511); a third connecting shaft (512) is arranged between the first connecting shaft (510) and the second connecting shaft (511); the third connecting shaft (512) is fixedly mounted on the double round head plate (52); a pressure rod (51) is arranged on the side of the double round head plate (52) away from the movable plate (57); one end of the pressure rod (51) is fixedly mounted on the first connecting shaft (510); and a flap (50) is fixedly mounted on the third connecting shaft (512).

3. A shaft protection device for a mine hoist according to claim 1, characterized in that: A second roller (55) is disposed at the end of the third connecting shaft (512); a protruding column (59) is integrally disposed at the bottom of the third connecting shaft (512) between the second roller (55) and the double round head plate (52); the protruding column (59) is cooperatively connected to the shifting frame (58); and a third roller (56) and a first roller (54) are respectively disposed on the side of the first connecting shaft (510) and the second connecting shaft (511) away from the double round head plate (52).

4. A shaft protection device for a mine hoist according to claim 3, characterized in that; A flap (51) is fixedly mounted on the third connecting shaft (512) between the two double round head plates (52); the flap (51) and the protruding column (59) have the same inclination angle.

5. A shaft protection device for a mine hoist according to claim 2, characterized in that: One end of the pressure rod (51) away from the first connecting shaft (510) is movably mounted on the connecting rod assembly (4); the connecting rod assembly (4) includes an L-shaped pull rod (40); the top of the L-shaped pull rod (40) is movably mounted on the pressure rod (51) through a connecting pin (42); the other end of the L-shaped pull rod (40) passes through the side wall of the material box (30) and is fixedly mounted on the bottom of the movable plate (38); a stopper (41) is also fixedly mounted on the inner side of the L-shaped pull rod (40).

6. A shaft protection device for a mine hoist according to claim 5, characterized in that: A first arc-shaped groove (31) and a second arc-shaped groove (32) are provided on the side walls on both sides of the material box (30); wherein; the first arc-shaped groove (31) is installed in cooperation with the first roller (54); the second arc-shaped groove (32) is installed in cooperation with the third roller (56); a circular hole groove is provided between the first arc-shaped groove (31) and the second arc-shaped groove (32) to facilitate the installation of the second roller (55); the centers of one end of the first arc-shaped groove (31) and the second arc-shaped groove (32) are on the same axis.

7. A shaft protection device for a mine hoist according to claim 4, characterized in that: Rollers (33) are mounted on the side walls at both ends of the material box (30) through seat bearings, and the rollers (33) are slidably mounted on the tracks inside the wellbore (2).

8. A shaft protection device for a mine hoist according to claim 7, characterized in that: The top of the material loading assembly (3) is installed in cooperation with the hoist (1) via a steel wire rope and a hook; the hoist (1) is fixedly installed on one side of the wellbore (2).

9. The shaft protection device of a mine hoist according to claim 1, characterized in that: A discharge port (310) is provided on one side of the material box (30), and a material door (39) is hingedly connected to the bottom of the discharge port (310), and slide grooves (311) are provided on both sides of the discharge port (310) at positions of the material box (30), and a first connecting rod (312) is installed inside the slide groove (311) through a slider, and a second connecting rod (313) is installed at the bottom of the first connecting rod (312) through a rotating shaft, and the bottom of the second connecting rod (313) is connected to both sides of the material door (39) through a rotating shaft.

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