Monorail hoisting device under mine

Abstract

The invention discloses an under-mine monorail hoisting device, and belongs to the technical field of under-mine rail transportation devices. The device comprises a monorail, a bearing vehicle, a lifting beam and a lifting frame, the bearing vehicle is movably mounted on the monorail; the lower side of the bearing vehicle is connected to the upper top of the hoisting beam; the number of the hoisting beams is not less than two; every two front and back adjacent lifting beams are connected through a connecting rod; a pair of length-adjustable primary chains is arranged on a single lifting beam; the lower end of the first-stage chain freely falls, and a hanging bracket is mounted at the falling point; a pair of secondary chains is mounted on the hanging bracket; a hook is arranged on the lower side of the secondary chain; the problems that an existing underground monorail crane structure is greatly restricted by environmental factors, and underground equipment with large size cannot be transported by directly utilizing existing monorail conveying equipment are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of underground mine rail transportation devices, and in particular to an underground mine monorail lifting device. Background Art

[0002] The monorail crane is a commonly used lifting mechanism for transporting equipment. However, due to environmental restrictions, it is not possible to directly use the monorail to transport larger equipment underground. Therefore, it is necessary to design a lifting device to solve the above problem. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a monorail lifting device for underground mines to solve the problem that the current monorail lifting structure for underground mines is greatly restricted by environmental factors and the existing monorail conveying equipment cannot be directly used to transport underground mine equipment of larger size.

[0004] To solve the above problems, the present invention provides the following technical solutions: A monorail lifting device for underground mines; it comprises a monorail, a carrying vehicle, a lifting beam and a hanger; The carrier vehicle is movably mounted on the monorail; the lower side of the carrier vehicle is connected to the upper top of the lifting beam; The number of lifting beams is not less than two; the two adjacent lifting beams are connected by a connecting rod; a pair of primary chains with adjustable lengths are arranged on a single lifting beam; the lower end of the primary chain hangs freely, and a hanger is installed at the hanging point; A pair of secondary chains are installed on the hanger; and a hook is arranged on the lower side of the secondary chain; A single lifting beam comprises a top plate; a pair of outer vertical plates and a pair of inner vertical plates are installed on the lower bottom surface of the top plate; the outer vertical plates and the inner vertical plates are arranged along the length direction of the top plate; the two outer vertical plates are respectively arranged on the left and right sides of the top plate; the inner vertical plate is arranged in the middle of the top plate; a hydraulic telescopic rod is installed between the two inner vertical plates; a guide groove is opened on the side of the inner vertical plate corresponding to the extended end of the hydraulic telescopic rod; a transverse push rod is installed on the extended end of the hydraulic telescopic rod; the two ends of the transverse push rod respectively pass through the guide grooves of the inner vertical plate and are arranged directly on the outer vertical plate; a steering sprocket is arranged on the end side of the transverse push rod between the outer vertical plate and the inner vertical plate; a lowering sprocket and a chain end buckle are also arranged between the outer vertical plate and the inner vertical plate; one end of the primary chain is connected to the chain end buckle, and the other end passes around the steering sprocket and then hangs down vertically from the lowering sprocket; a connecting lifting lug is also arranged on the top of the top plate; the load-bearing vehicle is connected to the lifting beam through the connecting lifting lug; The hanger includes two clamping plates arranged opposite to each other; two positioning shafts are installed between the two clamping plates; a secondary chain is installed on the positioning shaft; a positioning bracket is also installed at the middle of the clamping plates; ohm rings are rotatably installed on the left and right sides of the upper top of the positioning bracket; the protruding end of the ohm ring protrudes vertically upward from the clamping plate.

[0005] Preferably, two load-bearing vehicles are arranged on a single lifting beam; and the load-bearing vehicles arranged on each lifting beam are on the same straight line; the load-bearing vehicle comprises two oppositely arranged inclined plates; the angle between the planes where the inclined plates are located does not exceed 30°; at least one set of rollers is rotatably arranged on the upper sides of the opposite end surfaces of the two inclined plates; a cross plate and load-bearing bolts are also arranged between the two inclined plates; the middle part of the load-bearing bolts passes through the connecting lifting ears to connect the load-bearing vehicle to the lifting beam.

[0006] Furthermore, the inclined plate is a pocket-shaped flat plate structure with a raised lower part; a positioning groove is provided in the middle position of the lower side of the inclined plate; there are two horizontal plates in total, and the two horizontal plates are respectively arranged on both sides of the positioning groove; a vertical plate is arranged at the positioning groove; the two vertical plates are parallel to each other; the load-bearing bolts are installed on the vertical plates; positioning platforms are provided on the end sides of the two inclined plates facing away from each other; bolts and elastic gaskets are installed at the positioning platforms; one end of the bolt passes through the inclined plate and extends inwardly; the roller is rotatably installed on the protruding end of the bolt.

[0007] Preferably, the top plate is a strip-shaped flat plate structure with a small front end and a large rear end, and is symmetrical on both sides; the two outer vertical plates are respectively arranged at the left and right edge positions of the rear end of the top plate; the inner vertical plate is consistent with the length of the top plate; the two inner vertical plates are symmetrically arranged with the center line of the top plate as the axis, and the width between the inner vertical plates is consistent with the width of the front end of the top plate; sealing plates are provided on the front and rear end sides of the top plate; ear plates with positioning holes are installed on the sealing plates; both ends of the connecting rod between the lifting beams are installed on the two ear plates through bolt assemblies.

[0008] Furthermore, a number of limit plates are provided between the two inner vertical plates, and the limit plates are used to limit the movement of the fixed end of the hydraulic telescopic rod on the inner vertical plate; a positioning groove is opened at the lower side position of the outer vertical plate corresponding to the middle part of the top plate; one end of the chain end buckle is fixed to the inner vertical plate, and the other end is cantilevered at the positioning groove, and a maintenance cover plate is detachably installed on the protruding end of the chain end buckle by bolts; a load-bearing shaft seat is provided between the outer vertical plate and the inner vertical plate and at a position in front of the chain end buckle; the lowering sprocket is installed on the load-bearing shaft seat; a window plate is detachably installed on the tail of the outer vertical plate corresponding to the extreme telescopic position of the hydraulic telescopic rod by bolts.

[0009] Furthermore, a crane support plate with a lifting hole is provided on the outer end surface of the outer vertical plate and the inner vertical plate; and the connecting rod is a telescopic rod structure with adjustable length.

[0010] Preferably, top cover plates are respectively provided on the left and right sides of the upper top of the splint; the positioning bracket is arranged at a position between the two top cover plates; at least two pairs of positioning through holes are opened on the splint; the positioning shaft 1 is a connecting pin shaft structure, and the positioning shaft 1 is arranged through the positioning through holes on the two splints; the protruding end on one side of the positioning shaft 1 is detachably mounted on the splint through a slotted nut and a positioning pin; the two positioning shafts 1 are symmetrically mounted on the splint; a chain adjuster for controlling the working length of the secondary chain is installed at one place of the positioning shaft through an ohm ring and an auxiliary chain.

[0011] Furthermore, a pair of auxiliary support plates are arranged in the middle position of the outer end surface of the splint; a positioning through hole is also opened in the middle of the auxiliary support plate, and the auxiliary support plate and the positioning through hole in the middle of the splint are coaxial; a second positioning shaft is installed at the positioning through hole; the second positioning shaft is a connecting pin shaft structure; the second positioning shaft passes through the splint and the positioning bracket and is detachably installed on the auxiliary support plate through a slotted nut and a positioning pin; the positioning bracket includes an independent rectangular frame, and a pair of partitions are arranged in the middle of the rectangular frame; the partitions are arranged along the width direction of the rectangular frame; a support shaft is installed in the space between the end sides corresponding to the partition and the rectangular frame; the ohm ring is installed on the support shaft.

[0012] Beneficial effects of the present invention: The present invention designs a device for lifting using an underground mine monorail, which improves the lifting beam, that is, a lowering sprocket, a steering sprocket and a chain end buckle are further arranged by utilizing the movement of the extended end of a hydraulic telescopic rod relative to the beam body, so that a primary chain can control its lowering height relative to the beam body as the hydraulic telescopic rod is extended and retracted; the equipment to be transported can be quickly disassembled and assembled through the chain; because the width of the primary chain on the lifting beam cannot be designed to be too long, a new hanger structure is also designed specifically, so that the primary chain can be hung on the top of the hanger, and a positioning shaft is arranged on a clamping plate to arrange the secondary chain, thereby realizing the lifting and transportation of larger underground mine equipment on the monorail. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the three-dimensional structure of the inventive device in this embodiment; Figure 2 is a schematic diagram of the three-dimensional structure of the carrier vehicle in this embodiment; Figure 3 yes Figure 2 A front view of the device; Figure 4 yes Figure 3 Left side view of the device in the middle; Figure 5 is a side view of the load-bearing vehicle, the monorail and the connecting lugs on the lifting beam in the embodiment when they are connected; Figure 63D schematic diagram of the lifting beam and the primary chain in the embodiment when they are connected; Figure 7 yes Figure 6 Schematic diagram of the three-dimensional structure of the device at different viewing angles; Figure 8 yes Figure 6 A top view of the device; Fig. 9 is a schematic diagram of the three-dimensional structure of the hanger structure, the secondary chain and the hook in the connected state in this embodiment; Fig.10 yes Fig. 9 Schematic diagram of the three-dimensional structure of the device at different viewing angles; Fig.11 yes Fig. 9 A top view of the device; Fig.12 yes Fig. 9 Bottom view of the device in the middle; Description of the accompanying drawings: 1, monorail, 2, carrier, 3, lifting beam, 4, hanger, 5, connecting rod, 6, primary chain, 7, secondary chain, 8, hook, 201, inclined plate, 202, roller, 203, cross plate, 204, load-bearing bolt, 205, vertical plate, 206, positioning table, 301, top plate, 302, outer plate, 303, inner plate, 304, hydraulic telescopic rod, 305, horizontal push rod, 306, steering sprocket, 30 7. Lower the sprocket, 308. Chain end buckle, 309. Connecting ear, 310. Sealing plate, 311. Ear plate, 312. Limiting plate, 313. Maintenance sealing plate, 314. Bearing shaft seat, 315. Window plate, 316. Crane support plate, 401. Clamp, 402. Positioning shaft one, 403. Positioning bracket, 404. Ohm ring, 405. Top cover plate, 406. Chain adjuster, 407. Auxiliary support plate, 408. Positioning shaft two. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: Example: Reference Figure 1 , this embodiment provides a monorail lifting device for underground mines; it comprises a monorail 1, a carrier vehicle 2, a lifting beam 3 and a hanger 4; The carrier vehicle 2 is movably mounted on the monorail 1; the lower side of the carrier vehicle 2 is connected to the upper top of the lifting beam 3; The number of lifting beams 3 is not less than two; two adjacent lifting beams 3 are connected by a connecting rod 5; a pair of primary chains 6 with adjustable lengths are provided on a single lifting beam 3; the lower end of the primary chain 6 hangs freely, and a hanger 4 is installed at the hanging point; A pair of secondary chains 7 are installed on the hanger 4; and a hook 8 is provided on the lower side of the secondary chain 7; The single lifting beam 3 includes a top plate 301; a pair of outer vertical plates 302 and a pair of inner vertical plates 303 are installed on the lower bottom surface of the top plate 301; the outer vertical plates 302 and the inner vertical plates 303 are arranged along the length direction of the top plate 301; the two outer vertical plates 302 are respectively arranged on the left and right sides of the top plate 301; the inner vertical plate 303 is arranged in the middle of the top plate 301; a hydraulic telescopic rod 304 is installed between the two inner vertical plates 303; a guide groove is opened on one side of the inner vertical plate 303 corresponding to the extended end of the hydraulic telescopic rod 304; a horizontal push rod 305 is installed on the extended end of the hydraulic telescopic rod 304; The two ends are respectively passed through the guide grooves of the inner vertical plate 303 and are arranged directly on the outer vertical plate 302; a steering sprocket 306 is arranged on the end side of the horizontal push rod 305 located between the outer vertical plate 302 and the inner vertical plate 303; a lowering sprocket 307 and a chain end buckle 308 are also arranged between the outer vertical plate 302 and the inner vertical plate 303; one end of the primary chain 6 is connected to the chain end buckle 308, and the other end passes over the steering sprocket 306 and then hangs down vertically from the lowering sprocket 307; a connecting lug 309 is also arranged on the top of the top plate 301; the carrier 2 is connected to the lifting beam 3 through the connecting lug 309; The hanger 4 includes two clamping plates 401 arranged opposite to each other; two positioning shafts 402 are installed between the two clamping plates 401; the secondary chain 7 is installed on the positioning shaft 402; a positioning bracket 403 is also installed at a position located in the middle of the clamping plate 401; ohm rings 404 are rotatably installed on the left and right sides of the upper top of the positioning bracket 403; the protruding end of the ohm ring 404 protrudes vertically upward from the clamping plate 401.

[0015] Two load-bearing vehicles 2 are arranged on a single lifting beam 3; and the load-bearing vehicles 2 arranged on each lifting beam 3 are on the same straight line; the load-bearing vehicle 2 includes two oppositely arranged inclined plates 201; the angle between the planes where the inclined plates 201 are located does not exceed 30°; at least one set of rollers 202 is rotatably arranged on the upper side of the opposite end surfaces of the two inclined plates 201; a cross plate 203 and a load-bearing bolt 204 are also arranged between the two inclined plates 201; the middle part of the load-bearing bolt 204 passes through the connecting ear 309 to connect the load-bearing vehicle 2 to the lifting beam 3.

[0016] The inclined plate 201 is a pocket-shaped flat plate structure with a raised lower portion; a positioning groove is provided in the middle position of the lower side of the inclined plate 201; there are two horizontal plates 203, which are respectively arranged on both sides of the positioning groove; a vertical plate 205 is provided at the positioning groove; the two vertical plates 205 are parallel to each other; the load-bearing bolts 204 are installed on the vertical plates 205; positioning platforms 206 are provided on the opposite end sides of the two inclined plates 201; bolts and elastic gaskets are installed at the positioning platforms 206; one end of the bolt passes through the inclined plate 201 and extends inwardly; the roller 202 is rotatably installed on the protruding end of the bolt.

[0017] The top plate 301 is a strip-shaped flat plate structure with a small front end and a large rear end, and is symmetrical on both sides; the two outer vertical plates 302 are respectively arranged at the left and right edge positions of the rear end of the top plate 301; the inner vertical plate 303 is consistent with the length of the top plate 301; the two inner vertical plates 303 are symmetrically arranged with the center line of the top plate 301 as the axis, and the width between the inner vertical plates 303 is consistent with the width of the front end of the top plate 301; sealing plates 310 are arranged on the front and rear end sides of the top plate 301; ear plates 311 with positioning holes are installed on the sealing plates 310; both ends of the connecting rod 5 between the lifting beams 3 are installed on the two ear plates 311 through bolt assemblies.

[0018] A plurality of limit plates 312 are also provided between the two inner vertical plates 303, and the limit plates 312 are used to limit the movement of the fixed end of the hydraulic telescopic rod 304 on the inner vertical plate 303; a positioning groove is provided at the lower side position of the outer vertical plate 302 corresponding to the middle part of the top plate 301; one end of the chain end buckle 308 is fixed on the inner vertical plate 303, and the other end is cantilevered at the positioning groove, and a maintenance cover plate 313 is detachably installed on the protruding end of the chain end buckle 308 by bolts; a bearing shaft seat 314 is provided between the outer vertical plate 302 and the inner vertical plate 303 and at a position in front of the chain end buckle 308; the lowering sprocket 307 is installed on the bearing shaft seat 314; a window plate 315 is detachably installed on the tail of the outer vertical plate 302 corresponding to the extreme telescopic position of the hydraulic telescopic rod 304 by bolts.

[0019] A crane support plate 316 with a lifting hole is provided on the outer end surface of the outer vertical plate 302 and the inner vertical plate 303; the connecting rod 5 is a telescopic rod structure with adjustable length.

[0020] Top cover plates 405 are respectively arranged on the left and right sides of the upper top of the splint 401; the positioning bracket 403 is arranged at a position between the two top cover plates 405; no less than two pairs of positioning through holes are opened on the splint 401; the positioning shaft 402 is a connecting pin shaft structure, and the positioning shaft 402 passes through the positioning through holes on the two splints 401 for arrangement; the protruding end on one side of the positioning shaft 402 is detachably mounted on the splint 401 through a slotted nut and a positioning pin; the two positioning shafts 402 are symmetrically mounted on the splint 401; a chain adjuster 406 for controlling the working length of the secondary chain 7 is installed at the positioning shaft 402 through an ohm ring and an auxiliary chain.

[0021] A pair of auxiliary support plates 407 are also arranged in the middle position of the outer end surface of the splint 401; a positioning through hole is also opened in the middle of the auxiliary support plate 407, and the auxiliary support plate 407 and the positioning through hole in the middle of the splint 401 are coaxial; a second positioning shaft 408 is installed at the positioning through hole; the second positioning shaft 408 is a connecting pin shaft structure; the second positioning shaft 408 passes through the splint 401 and the positioning bracket 403 and is detachably installed on the auxiliary support plate 407 through a slotted nut and a positioning pin; the positioning bracket 403 includes an independent rectangular frame, and a pair of partitions are arranged in the middle of the rectangular frame; the partitions are arranged along the width direction of the rectangular frame; a support shaft is installed in the space between the end sides corresponding to the partition and the rectangular frame; the ohmic ring 404 is installed on the support shaft.

[0022] When using the device of the invention in this embodiment, it is only necessary to first adjust the entire lifting device to the monorail according to the width of the lifting equipment, and then control the contraction length of the hydraulic telescopic rod on the lifting beam so that the push rod on the extended end can be retracted in the guide groove on the rear side of the inner vertical plate. As the push rod moves, the steering sprocket also moves accordingly, and then the length between the steering sprocket and the lowering sprocket, i.e., the chain end buckle, changes, so the lowering length of the primary chain will also be lengthened accordingly; this allows the hanger to be placed at the same height as the equipment to be lifted and moved, and then the secondary chains on the two lifting beams are used to enable the hooks to correspondingly hang on the four corners of the equipment to be lifted, and then the hydraulic telescopic rod is correspondingly controlled to extend, so that the equipment to be lifted can be lifted upwards.

Claims

1. A monorail lifting device for underground mines, characterized in that: It comprises a monorail (1), a carrying vehicle (2), a lifting beam (3) and a hanger (4); The carrier vehicle (2) is movably mounted on the monorail (1); the lower side of the carrier vehicle (2) is connected to the upper top of the lifting beam (3); The number of lifting beams (3) is not less than two; two front and rear adjacent lifting beams (3) are connected via a connecting rod (5); a pair of primary chains (6) with adjustable lengths are provided on a single lifting beam (3); the lower end of the primary chain (6) hangs freely, and a hanger (4) is installed at the hanging point; A pair of secondary chains (7) are mounted on the hanger (4); and a hook (8) is provided on the lower side of the secondary chain (7); A single lifting beam (3) comprises a top plate (301); a pair of outer vertical plates (302) and a pair of inner vertical plates (303) are installed on the lower bottom surface of the top plate (301); the outer vertical plates (302) and the inner vertical plates (303) are arranged along the length direction of the top plate (301); the two outer vertical plates (302) are respectively arranged on the left and right sides of the top plate (301); the inner vertical plate (303) is arranged in the middle of the top plate (301); a hydraulic telescopic rod (304) is installed between the two inner vertical plates (303); a guide groove is opened on one side of the inner vertical plate (303) corresponding to the extended end of the hydraulic telescopic rod (304); a horizontal push rod (305) is installed on the extended end of the hydraulic telescopic rod (304); the horizontal push rod (305) The two ends are respectively passed through the guide grooves of the inner vertical plate (303) and are arranged directly on the outer vertical plate (302); a steering sprocket (306) is arranged on the end side of the horizontal push rod (305) located between the outer vertical plate (302) and the inner vertical plate (303); a lowering sprocket (307) and a chain end buckle (308) are also arranged between the outer vertical plate (302) and the inner vertical plate (303); one end of the primary chain (6) is connected to the chain end buckle (308), and the other end passes around the steering sprocket (306) and then hangs vertically downward from the lowering sprocket (307); a connecting lug (309) is also arranged on the top of the top plate (301); the carrier vehicle (2) is connected to the lifting beam (3) through the connecting lug (309); The hanger (4) comprises two clamping plates (401) arranged opposite to each other; two positioning shafts (402) are installed between the two clamping plates (401); a secondary chain (7) is installed on the positioning shaft (402); a positioning bracket (403) is also installed at a position located in the middle of the clamping plate (401); ohm rings (404) are rotatably installed on the left and right sides of the upper top of the positioning bracket (403); and the protruding end of the ohm ring (404) is vertically protruded upward from the clamping plate (401).

2. The underground monorail lifting device according to claim 1, characterized in that: Two load-bearing vehicles (2) are arranged on a single lifting beam (3); and the load-bearing vehicles (2) arranged on each lifting beam (3) are located on the same straight line; the load-bearing vehicle (2) comprises two inclined plates (201) arranged opposite to each other; the angle between the planes where the inclined plates (201) are located does not exceed 30 degrees; at least one set of rollers (202) is rotatably arranged on the upper sides of the opposite end surfaces of the two inclined plates (201); a cross plate (203) and a load-bearing bolt (204) are also arranged between the two inclined plates (201); the middle part of the load-bearing bolt (204) passes through a connecting lug (309) to connect the load-bearing vehicle (2) to the lifting beam (3).

3. The underground monorail lifting device according to claim 2, characterized in that: The inclined plate (201) is a pocket-shaped flat plate structure with a raised lower portion; a positioning groove is provided at the middle position of the lower side of the inclined plate (201); there are two horizontal plates (203), which are respectively arranged on both sides of the positioning groove; a vertical plate (205) is arranged at the positioning groove; the two vertical plates (205) are parallel to each other; a load-bearing bolt (204) is installed on the vertical plate (205); a positioning platform (206) is provided on the end side surfaces of the two inclined plates (201) facing away from each other; a bolt and an elastic gasket are installed at the positioning platform (206); one end of the bolt passes through the inclined plate (201) and extends inwardly; and the roller (202) is rotatably installed on the protruding end of the bolt.

4. The underground monorail lifting device according to claim 1, characterized in that: The top plate (301) is a strip-shaped flat plate structure with a small front end and a large rear end, and is symmetrical on both sides; the two outer vertical plates (302) are respectively arranged at the left and right edge positions of the rear end of the top plate (301); the inner vertical plate (303) is consistent with the length of the top plate (301); the two inner vertical plates (303) are symmetrically arranged with the center line of the top plate (301) as the axis, and the width between the inner vertical plates (303) is consistent with the width of the front end of the top plate (301); sealing plates (310) are arranged on the front and rear end sides of the top plate (301); ear plates (311) with positioning holes are installed on the sealing plates (310); both ends of the connecting rod (5) between the lifting beams (3) are installed on the two ear plates (311) through bolt assemblies.

5. The underground monorail lifting device according to claim 4, characterized in that: A plurality of limiting plates (312) are arranged between the two inner vertical plates (303), and the limiting plates (312) are used to limit the movement of the fixed end of the hydraulic telescopic rod (304) on the inner vertical plate (303); a positioning groove is provided at a lower position of the outer vertical plate (302) corresponding to the middle of the top plate (301); one end of the chain end buckle (308) is fixed to the inner vertical plate (303), and the other end is arranged in a cantilevered manner at the positioning groove, and the chain end buckle (308) is provided at the lower position of the middle portion of the top plate (301); An inspection cover plate (313) is detachably mounted on the protruding end thereof by means of bolts; a bearing shaft seat (314) is provided between the outer vertical plate (302) and the inner vertical plate (303) and at a position in front of the chain end buckle (308); the lowering sprocket (307) is mounted on the bearing shaft seat (314); and a window plate (315) is detachably mounted on the tail of the outer vertical plate (302) corresponding to the extreme telescopic position of the hydraulic telescopic rod (304) by means of bolts.

6. The underground monorail lifting device according to claim 1, characterized in that: A crane support plate (316) with a lifting hole is provided on the outer end surfaces of the outer vertical plate (302) and the inner vertical plate (303); and the connecting rod (5) is a telescopic rod structure with adjustable length.

7. The underground monorail lifting device according to claim 1, characterized in that: Top cover plates (405) are respectively arranged on the left and right sides of the upper top of the clamping plate (401); the positioning bracket (403) is arranged at a position between the two top cover plates (405); at least two pairs of positioning through holes are opened on the clamping plate (401); the positioning shaft one (402) is a connecting pin shaft structure, and the positioning shaft one (402) is arranged to pass through the positioning through holes on the two clamping plates (401); the protruding end on one side of the positioning shaft one (402) is detachably mounted on the clamping plate (401) through a slotted nut and a positioning pin; the two positioning shafts one (402) are symmetrically mounted on the clamping plate (401); a chain adjuster (406) for controlling the working length of the secondary chain (7) is installed at the positioning shaft one (402) through an ohmic ring and an auxiliary chain.

8. The underground monorail lifting device according to claim 6, characterized in that: A pair of auxiliary support plates (407) are also provided at the middle position of the outer end surface of the clamping plate (401); a positioning through hole is also opened in the middle of the auxiliary support plate (407), and the positioning through holes in the middle of the auxiliary support plate (407) and the clamping plate (401) are coaxial; a second positioning shaft (408) is installed at the positioning through hole; the second positioning shaft (408) is a connecting pin shaft structure; the second positioning shaft (408) passes through the clamping plate (401) and the positioning bracket (403) and is detachably installed on the auxiliary support plate (407) through a slotted nut and a positioning pin; the positioning bracket (403) includes an independent rectangular frame, and a pair of partitions are provided in the middle of the rectangular frame; the partitions are arranged along the width direction of the rectangular frame; a support shaft is installed in the space between the end sides corresponding to the partition and the rectangular frame; the ohm ring (404) is installed on the support shaft.

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