A double limit protection structure for a vertical shaft construction hoist

Abstract

The present invention relates to the technical field of shaft construction hoists, and specifically to a dual limit protection structure of a shaft vertical construction hoist, comprising a support plate, a buffer assembly and a first limit protection assembly, wherein a first motor is provided at the upper end of the support plate, a hard-toothed surface reduction box is symmetrically provided on the first motor, and a high-speed end working brake device is provided on the hard-toothed surface reduction box. When the present invention is used, the second rotating rod drives the third bevel gear to rotate, the third bevel gear drives the fourth bevel gear, the third rotating rod and the fifth bevel gear to rotate, the fifth bevel gear thereby drives the bevel gear ring to rotate, the bevel gear ring thereby drives the sixth bevel gear and the threaded sleeve to rotate, and the sliding rod structure is provided in coordination, the threaded sleeve rotates to drive the threaded rod and the clamping block to move closer to each other, and the clamping block thereby clamps the connecting rod, further improving the limit effect on the manned cage, and at the same time, the coordinated use of the limit plate and the connecting rod structure facilitates the manned cage to remain stable during the up and down movement.

Description

Technical Field

[0001] The invention relates to the technical field of a vertical shaft construction hoist, in particular to a double limit protection structure of a vertical shaft construction hoist. Background Art

[0002] A hoist is a special equipment that enables the lifting container to reciprocate up and down in vertical and inclined shafts to complete tasks such as lifting minerals, lifting personnel, and transporting materials and equipment. It is an important equipment in coal, metal and non-metallic mines. The existing vertical lifting mechanism of the vertical shaft drives the manned cage up and down through a winch, or uses a mine with multi-rope friction wheel lifting to drive the manned cage up and down through a driving device.

[0003] However, the vertical lifting mechanism in the prior art lacks safety facilities and cannot ensure that the vertical lifting mechanism takes timely and effective emergency measures when moving the manned cage up and down. Once an accident occurs in the vertical lifting mechanism, the manned cage is prone to fall. Therefore, the present invention provides a double limit protection structure for a shaft vertical construction hoist to solve the above-mentioned problems. Summary of the invention

[0004] The object of the present invention is to provide a double limit protection structure for a vertical construction hoist in a shaft to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A double limit protection structure for a vertical shaft construction hoist comprises a support plate, a buffer assembly and a first limit protection assembly, wherein a first motor is arranged at the upper end of the support plate, a hard-tooth surface reduction box is symmetrically arranged on the first motor, a high-speed end working brake device is arranged on the hard-tooth surface reduction box, and a folding wire drum is arranged at the rear end of the hard-tooth surface reduction box, a low-speed end safety brake device is symmetrically arranged on the upper end of the support plate corresponding to the folding wire drum, and a steel wire rope passing through the support plate is arranged on the folding wire drum, a manned cage is arranged at the lower end of the steel wire rope, a buffer assembly is arranged at the lower end of the manned cage, connecting rods are arranged on the left and right sides of the manned cage, the upper ends of the connecting rods are fixedly connected to the support plate, a start button is arranged in the manned cage, and a first limit protection assembly is arranged at the upper end of the manned cage corresponding to the connecting rod.

[0007] As a further solution of the present invention, the buffer assembly includes a bottom plate, a slide plate, a buffer plate, a slide groove and a spring. The lower end of the manned tank cage is provided with a plurality of bottom plates, the lower end of the bottom plate is slidably connected to the slide plate, the lower end of the bottom plate is provided with a slide groove corresponding to the slide plate, and the lower end of the slide plate is provided with a buffer plate, and the buffer plate and the bottom plate are provided to facilitate providing a support effect.

[0008] As a further solution of the present invention, a plurality of springs are provided in the slide groove, the upper ends of the springs are fixedly connected to the top end of the slide groove, and the lower ends of the springs are fixedly connected to the slide plate. Through the provided slide plate and spring structure, the elastic potential energy of the springs can provide a buffering effect for the manned cage, thereby preventing the manned cage from directly contacting the bottom of the well and causing impact.

[0009] As a further scheme of the present invention, the first limit protection component includes a first rotating rod and a moving block, a fixed plate is symmetrically provided on the upper end of the manned tank cage, a first rotating rod is provided on the fixed plate, a first bearing is provided at the connection between the first rotating rod and the fixed plate, the first rotating rod is symmetrically threaded with the moving block, and two opposite sections of thread lines are provided on the first rotating rod corresponding to the two moving blocks, and a limit rod is symmetrically provided front and back at one end of the two fixed plates away from each other, the other end of the limit rod penetrates the moving block, the moving block is slidably connected to the limit rod, and a limit block is provided at the other end of the limit rod, so that the two moving blocks can be driven to move away from each other by rotating the first rotating rod, and the moving block can be limited by the set limit rod to prevent the moving block from rotating with the rotation of the first rotating rod.

[0010] As a further solution of the present invention, the two moving blocks are symmetrically provided with first friction pulleys at one end away from each other, the two fixed plates are symmetrically provided with fixing rods at one end away from each other, a connecting plate is provided at the other end of the fixing rod, and the two connecting plates are provided with a second friction pulley at one end close to each other corresponding to the first friction pulley, and the second friction pulley is in contact with the connecting rod. The two moving blocks and the first friction pulley are driven to move away from each other by the first rotating rod, and the first friction pulley and the second friction pulley structure are provided in cooperation with each other, so as to clamp the connecting rod, thereby facilitating the limiting of the manned cage and preventing the manned cage from falling.

[0011] As a further scheme of the present invention, a first bevel gear is provided on the first rotating rod, and the lower end of the first bevel gear is meshed with the second bevel gear. A second rotating rod that penetrates the manned cage is provided at the lower end of the second bevel gear, and a second bearing fixedly connected to the top end of the manned cage is provided on the second rotating rod, and a second limit protection assembly is provided on the second rotating rod, and the lower end of the second rotating rod is provided with a first gear, and the front end of the first gear is meshed with the second gear, and a rotating shaft is provided at the upper end of the second gear, and a second motor is provided at the upper end of the rotating shaft, and the upper end of the second motor is fixedly connected to the top end of the manned cage. By starting the first motor, it is convenient to drive the folding reel to unwind the wire rope, thereby facilitating the manned cage to descend. Pressing the start button, starting the second motor drives the rotating shaft and the second gear to rotate, and the second gear drives the first gear, the second rotating rod and the second bevel gear to rotate, and the second bevel gear thereby drives the first bevel gear and the first rotating rod to rotate.

[0012] As a further solution of the present invention, the second position limit protection assembly includes a third bevel gear, the second rotating rod is provided with a third bevel gear, the third bevel gear is symmetrically meshed with a fourth bevel gear, the other end of the fourth bevel gear is provided with a third rotating rod that passes through the manned cage, the other end of the third rotating rod is provided with a fifth bevel gear, and a third bearing is provided at the connection between the third rotating rod and the manned cage, the third bevel gear is driven to rotate by the second rotating rod, and the third bevel gear drives the fourth bevel gear, the third rotating rod and the fifth bevel gear to rotate.

[0013] As a further scheme of the present invention, the lower end of the fifth bevel gear engages with the bevel gear ring, and the lower side of the bevel gear ring is provided with a limit plate fixedly connected to the manned tank cage, and the connecting rod passes through the limit plate, and the limit plate is slidably connected to the connecting rod, and a plurality of support blocks are provided at the lower end of the bevel gear ring, and the support blocks are slidably connected to the limit plate, and an annular groove is provided at the upper end of the limit plate corresponding to the support block. Through the coordinated use of the set support blocks and the annular groove structure, the fifth bevel gear can easily drive the bevel gear ring to rotate, and at the same time, the coordinated use of the limit plate and the connecting rod structure facilitates the manned tank cage to remain stable during the up and down movement.

[0014] As a further scheme of the present invention, the upper end of the bevel gear ring is symmetrically meshed with the sixth bevel gear front and back, and the ends of the two sixth bevel gears close to each other are provided with a threaded sleeve, and the other end of the threaded sleeve is threadedly connected to a threaded rod, and the other end of the threaded rod is provided with a clamping block corresponding to the connecting rod, and the threaded sleeve is provided with a fourth bearing, and the fourth bearing is provided with a vertical plate, and the lower end of the vertical plate is fixedly connected to the limit plate, and the ends of the two clamping blocks away from each other are provided with a sliding rod penetrating the vertical plate, and the sliding rod is slidably connected to the vertical plate, and the sixth bevel gear and the threaded sleeve are driven to rotate by the bevel gear ring, and the sliding rod structure is provided in combination, and the rotation of the threaded sleeve drives the threaded rod and the clamping block to move close to each other, so that the clamping block clamps the connecting rod, thereby further improving the limiting effect of the manned cage, and at the same time, the coordinated use of the limit plate and the connecting rod structure facilitates the manned cage to remain stable during up and down movement.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the present invention is used, starting the first motor is convenient for driving the folding wire drum to unwind the wire rope, thereby facilitating the descent of the manned cage. When an emergency occurs, pressing the start button, starting the second motor drives the rotating shaft and the second gear to rotate, the second gear drives the first gear, the second rotating rod and the second bevel gear to rotate, the second bevel gear thereby drives the first bevel gear and the first rotating rod to rotate, the first rotating rod thereby drives the two moving blocks and the first friction pulley to move away from each other, cooperates with the second friction pulley structure provided, the first friction pulley and the second friction pulley clamp the connecting rod, which is convenient for limiting the manned cage and preventing the manned cage from falling.

[0017] 2. When the present invention is used, the second rotating rod drives the third bevel gear to rotate, the third bevel gear drives the fourth bevel gear, the third rotating rod and the fifth bevel gear to rotate, the fifth bevel gear thereby drives the bevel gear ring to rotate, the bevel gear ring thereby drives the sixth bevel gear and the threaded sleeve to rotate, and the sliding rod structure is provided in cooperation, the threaded sleeve rotates to drive the threaded rod and the clamping block to move closer to each other, and the clamping block clamps the connecting rod, further improving the limiting effect of the manned cage, and the coordinated use of the limiting plate and the connecting rod structure facilitates the manned cage to remain stable during the up and down movement.

[0018] 3. When the present invention is used, when the manned cage descends to the bottom of the well, the buffer plate first contacts the bottom of the well, and the elastic potential energy of the spring, in combination with the provided slide plate and spring structure, provides a buffering effect for the manned cage, thereby preventing the manned cage from directly contacting the bottom of the well and causing impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram is a structural diagram of a double limit protection structure of a vertical shaft construction hoist.

[0020] Figure 2 The present invention is a schematic diagram of the front view of a double limit protection structure of a vertical shaft construction hoist.

[0021] Figure 3 The figure is a schematic diagram of the cross-sectional structure of a double limit protection structure of a vertical construction hoist in a shaft.

[0022] Figure 4 It is a double limit protection structure for a vertical shaft construction hoist Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0023] Figure 5 It is a double limit protection structure for a vertical shaft construction hoist Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0024] Figure 6 It is a double limit protection structure for a vertical shaft construction hoist Figure 3 Schematic diagram of the enlarged structure at point C in the middle.

[0025] Figure 7 It is a double limit protection structure for a vertical shaft construction hoist Figure 3 Schematic diagram of the enlarged structure at D in the middle.

[0026] In the figure: 1, support plate; 2, first motor; 3, high-speed end working brake device; 4, hard-toothed gearbox; 5, folding wire drum; 6, low-speed end safety brake device; 7, wire rope; 8, manned cage; 9, buffer assembly; 901, bottom plate; 902, slide plate; 903, buffer plate; 904, slide groove; 905, spring; 10, start button; 11, first limit protection assembly; 1101, first rotating rod; 1102, fixed plate; 1103, first bearing; 1104, first bevel gear; 1105, second bevel gear; 1106, moving block; 1107, limit rod; 1108, limit block; 1109, first friction pulley; 1110, fixed rod; 1111, connecting plate; 1 112, second friction pulley; 1113, second rotating rod; 1114, second bearing; 1115, first gear; 1116, second gear; 1117, rotating shaft; 1118, second motor; 12, connecting rod; 13, second limit protection assembly; 1301, third bevel gear; 1302, fourth bevel gear; 1303, third rotating rod; 1304, third bearing; 1305, fifth bevel gear; 1306, bevel gear ring; 1307, limit plate; 1308, support block; 1309, annular groove; 1310, sixth bevel gear; 1311, threaded sleeve; 1312, threaded rod; 1313, fourth bearing; 1314, vertical plate; 1315, clamping block; 1316, sliding rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] In the present invention, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present invention is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present invention.

[0029] Example

[0030] See also Figures 1 to 7 In an embodiment of the present invention, a double limit protection structure of a vertical shaft construction hoist comprises a support plate 1, a buffer assembly 9 and a first limit protection assembly 11, a first motor 2 is arranged at the upper end of the support plate 1, a hard-tooth surface reduction box 4 is symmetrically arranged on the first motor 2, a high-speed end working brake device 3 is arranged on the hard-tooth surface reduction box 4, and a folding drum 5 is arranged at the rear end of the hard-tooth surface reduction box 4, a low-speed end safety brake device 6 is symmetrically arranged on the upper end of the support plate 1 corresponding to the folding drum 5, and a steel wire rope 7 passing through the support plate 1 is arranged on the folding drum 5, a manned cage 8 is arranged at the lower end of the steel wire rope 7, and a buffer assembly 9 is arranged at the lower end of the manned cage 8, connecting rods 12 are arranged on the left and right sides of the manned cage 8, and the upper end of the connecting rod 12 is fixedly connected to the support plate 1, a start button 10 is arranged in the manned cage 8, and a first limit protection assembly 11 is arranged at the upper end of the manned cage 8 corresponding to the connecting rod 12.

[0031] The buffer assembly 9 includes a bottom plate 901, a slide plate 902, a buffer plate 903, a slide groove 904 and a spring 905. The lower end of the manned cage 8 is provided with a plurality of bottom plates 901, the lower end of the bottom plate 901 is slidably connected to the slide plate 902, a slide groove 904 is provided at the lower end of the bottom plate 901 corresponding to the slide plate 902, and a buffer plate 903 is provided at the lower end of the slide plate 902, and a plurality of springs 905 are provided in the slide groove 904, the upper end of the spring 905 is fixedly connected to the top end of the slide groove 904, and the lower end of the spring 905 is fixedly connected to the slide plate 902.

[0032] Specifically, by providing the slide plate 902 and the spring 905 structure, the elastic potential energy of the spring 905 can provide a buffering effect for the manned cage 8, thereby preventing the manned cage 8 from directly contacting the well bottom and causing impact.

[0033] The first position limiting protection assembly 11 comprises a first rotating rod 1101 and a moving block 1106. A fixing plate 1102 is symmetrically arranged at the upper end of the manned cage 8. The fixing plate 1102 is provided with a first rotating rod 1101. A first bearing 1103 is provided at the connection between the first rotating rod 1101 and the fixing plate 1102. The first rotating rod 1101 is symmetrically threadedly connected to the moving block 1106. Two opposite threads are provided on the first rotating rod 1101 corresponding to the two moving blocks 1106. The ends of the two fixed plates 1102 that are away from each other are symmetrically provided with limit rods 1107, the other end of the limit rod 1107 passes through the moving block 1106, the moving block 1106 is slidably connected to the limit rod 1107, and the other end of the limit rod 1107 is provided with a limit block 1108, the ends of the two moving blocks 1106 that are away from each other are symmetrically provided with first friction pulleys 1109, and the ends of the two fixed plates 1102 that are away from each other are symmetrically provided with fixed rods 1110 The other end of the fixed rod 1110 is provided with a connecting plate 1111, and the ends of the two connecting plates 1111 close to each other are provided with a second friction pulley 1112 corresponding to the first friction pulley 1109, and the second friction pulley 1112 is in contact with the connecting rod 12, and the first rotating rod 1101 is provided with a first bevel gear 1104, and the lower end of the first bevel gear 1104 is meshed with the second bevel gear 1105, and the lower end of the second bevel gear 1105 is provided with a second rotating rod 1113 that penetrates the manned cage 8, The second rotating rod 1113 is provided with a second bearing 1114 fixedly connected to the top of the manned cage 8, and the second rotating rod 1113 is provided with a second limit protection assembly 13, the lower end of the second rotating rod 1113 is provided with a first gear 1115, the front end of the first gear 1115 is engaged with the second gear 1116, the upper end of the second gear 1116 is provided with a rotating shaft 1117, the upper end of the rotating shaft 1117 is provided with a second motor 1118, and the upper end of the second motor 1118 is fixedly connected to the top of the manned cage 8.

[0034] Specifically, the second motor 1118 is started to drive the rotating shaft 1117 and the second gear 1116 to rotate, the second gear 1116 drives the first gear 1115, the second rotating rod 1113 and the second bevel gear 1105 to rotate, the second bevel gear 1105 thereby drives the first bevel gear 1104 and the first rotating rod 1101 to rotate, the first rotating rod 1101 thereby drives the two moving blocks 1106 and the first friction pulley 1109 to move away from each other, and the second friction pulley 1112 structure is provided in cooperation, the first friction pulley 1109 and the second friction pulley 1112 clamp the connecting rod 12, so as to limit the manned cage 8 and prevent the manned cage 8 from falling.

[0035] The second limit protection assembly 13 includes a third bevel gear 1301, the second rotating rod 1113 is provided with a third bevel gear 1301, the third bevel gear 1301 is symmetrically meshed with a fourth bevel gear 1302, the other end of the fourth bevel gear 1302 is provided with a third rotating rod 1303 that penetrates the manned cage 8, the other end of the third rotating rod 1303 is provided with a fifth bevel gear 1305, and a third bearing 1304 is provided at the connection between the third rotating rod 1303 and the manned cage 8, the lower end of the fifth bevel gear 1305 is meshed with a bevel gear ring 1306, the lower side of the bevel gear ring 1306 is provided with a limit plate 1307 fixedly connected to the manned cage 8, and the connecting rod 12 penetrates the limit plate 1307, the limit plate 1307 is slidably connected to the connecting rod 12, and the lower end of the bevel gear ring 1306 is provided with a plurality of support blocks 1308, which support The support block 1308 is slidably connected with the limit plate 1307, and an annular groove 1309 is provided on the upper end of the limit plate 1307 corresponding to the support block 1308. The upper end of the bevel gear ring 1306 is symmetrically meshed with the sixth bevel gear 1310 front and back. The ends of the two sixth bevel gears 1310 close to each other are provided with a threaded sleeve 1311, and the other end of the threaded sleeve 1311 is threadedly connected to the threaded rod 1312, and the other end of the threaded rod 1312 is provided with a clamping block 1315 corresponding to the connecting rod 12, and the threaded sleeve 1311 is provided with a fourth bearing 1313, and the fourth bearing 1313 is provided with a vertical plate 1314, and the lower end of the vertical plate 1314 is fixedly connected to the limit plate 1307, and the ends of the two clamping blocks 1315 away from each other are provided with a sliding rod 1316 penetrating the vertical plate 1314, and the sliding rod 1316 is slidably connected to the vertical plate 1314.

[0036] Specifically, the second rotating rod 1113 drives the third bevel gear 1301 to rotate, and the third bevel gear 1301 drives the fourth bevel gear 1302, the third rotating rod 1303 and the fifth bevel gear 1305 to rotate, and the fifth bevel gear 1305 thereby drives the bevel gear ring 1306 to rotate, and the bevel gear ring 1306 thereby drives the sixth bevel gear 1310 and the threaded sleeve 1311 to rotate, and the sliding rod 1316 structure is arranged in cooperation, and the rotation of the threaded sleeve 1311 drives the threaded rod 1312 and the clamping block 1315 to move closer to each other, and the clamping block 1315 thereby clamps the connecting rod 12, further improving the limiting effect of the manned cage 8, and the coordinated use of the limiting plate 1307 and the connecting rod 12 structure facilitates the manned cage 8 to remain stable during the up and down movement.

[0037] The working principle of the present invention is:

[0038] When the present invention is used, starting the first motor 2 is convenient for driving the folding wire drum 5 to unwind the wire rope 7, thereby facilitating the manned cage 8 to descend. When an emergency occurs, pressing the start button 10, starting the second motor 1118 drives the rotating shaft 1117 and the second gear 1116 to rotate, and the second gear 1116 drives the first gear 1115, the second rotating rod 1113 and the second bevel gear 1105 to rotate, and the second bevel gear 1105 thereby drives the first bevel gear 1104 and the first rotating rod 1101 to rotate, and the first rotating rod 1101 thereby drives the two moving blocks 1106 and the first friction pulley 1109 to move away from each other, and cooperates with the second friction pulley 1112 structure, the first friction pulley 1109 and the second friction pulley 1112 clamp the connecting rod 12, so as to limit the manned cage 8 and prevent the manned cage 8 from falling. At the same time, the second rotating rod 1113 drives the third bevel gear 1301 to rotate, The third bevel gear 1301 drives the fourth bevel gear 1302, the third rotating rod 1303 and the fifth bevel gear 1305 to rotate, and the fifth bevel gear 1305 thereby drives the bevel gear ring 1306 to rotate, and the bevel gear ring 1306 thereby drives the sixth bevel gear 1310 and the threaded sleeve 1311 to rotate, and cooperates with the slide rod 1316 structure, and the rotation of the threaded sleeve 1311 drives the threaded rod 1312 and the clamping block 1315 to move closer to each other, and the clamping block 1315 clamps the connecting rod 12, further improving the limiting effect of the manned cage 8. At the same time, the coordinated use of the limiting plate 1307 and the connecting rod 12 structure facilitates the manned cage 8 to remain stable during the up and down movement. When the manned cage 8 descends to the bottom of the well, the buffer plate 903 first contacts the bottom of the well, and cooperates with the slide plate 902 and the spring 905 structure. The elastic potential energy of the spring 905 facilitates the buffering effect of the manned cage 8, avoiding the manned cage 8 directly contacting the bottom of the well and causing impact.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double limit protection structure for a vertical shaft construction hoist, comprising a support plate (1), a buffer assembly (9) and a first limit protection assembly (11), characterized in that: The support plate (1) is provided with a first motor (2) at the upper end, a hard-toothed surface reduction box (4) is symmetrically provided on the first motor (2), a high-speed end working brake device (3) is provided on the hard-toothed surface reduction box (4), and a folding wire drum (5) is provided at the rear end of the hard-toothed surface reduction box (4), a low-speed end safety brake device (6) is symmetrically provided on the upper end of the support plate (1) corresponding to the folding wire drum (5), and a steel wire rope (7) passing through the support plate (1) is provided on the folding wire drum (5), a manned tank cage (8) is provided at the lower end of the steel wire rope (7), and a buffer assembly (9) is provided at the lower end of the manned tank cage (8), and connecting rods (12) are provided on the left and right sides of the manned tank cage (8), and the upper ends of the connecting rods (12) are fixedly connected to the support plate (1), and a buffer assembly (9) is provided in the manned tank cage (8). A start button (10) is provided, and a first position limiting protection component (11) is provided at the upper end of the manned cage (8) corresponding to the connecting rod (12), and the first position limiting protection component (11) comprises a first rotating rod (1101) and a moving block (1106). A fixed plate (1102) is symmetrically provided at the upper end of the manned cage (8), and the first rotating rod (1101) is provided on the fixed plate (1102). A first bearing (1103) is provided at the connection between the first rotating rod (1101) and the fixed plate (1102), and the first rotating rod (1101) is symmetrically threadedly connected to the moving block (1106) on the left and right, and two opposite thread lines are provided on the first rotating rod (1101) corresponding to the two moving blocks (1106), and the two fixed plates (1102) are mutually connected. A limit rod (1107) is symmetrically arranged at the distal end, the other end of the limit rod (1107) passes through a moving block (1106), the moving block (1106) is slidably connected to the limit rod (1107), and a limit block (1108) is arranged at the other end of the limit rod (1107), a first bevel gear (1104) is arranged on the first rotating rod (1101), the lower end of the first bevel gear (1104) is meshed with a second bevel gear (1105), a second rotating rod (1113) passing through the manned cage (8) is arranged at the lower end of the second bevel gear (1105), the second rotating rod (1113) is provided with a second bearing (1114) fixedly connected to the top end of the manned cage (8), and a second limit protection assembly (1308) is arranged on the second rotating rod (1113). ), a first gear (1115) is provided at the lower end of the second rotating rod (1113), the front end of the first gear (1115) is meshed with the second gear (1116), a rotating shaft (1117) is provided at the upper end of the second gear (1116), a second motor (1118) is provided at the upper end of the rotating shaft (1117), the upper end of the second motor (1118) is fixedly connected to the top of the manned cage (8), the second position limiting protection assembly (13) comprises a third bevel gear (1301), the second rotating rod (1113) is provided with a third bevel gear (1301), the third bevel gear (1301) is symmetrically meshed with a fourth bevel gear (1302), and the other end of the fourth bevel gear (1302) is provided with a third rotating rod (1303) that passes through the manned cage (8),A fifth bevel gear (1305) is provided at the other end of the third rotating rod (1303), and a third bevel gear (1305) is provided at the connection between the third rotating rod (1303) and the manned cage (8). The fifth bevel gear (1305) is meshed with a bevel gear ring (1306) at its lower end, a limit plate (1307) fixedly connected to the manned cage (8) is provided at the lower side of the bevel gear ring (1306), and a connecting rod (12) passes through the limit plate (1307), the limit plate (1307) and the connecting rod (12) are slidably connected, a plurality of support blocks (1308) are provided at the lower end of the bevel gear ring (1306), the support blocks (1308) and the limit plate (1307) are slidably connected, an annular groove (1309) is provided at the upper end of the limit plate (1307) corresponding to the support blocks (1308), and the upper end of the bevel gear ring (1306) is symmetrically meshed with a sixth bevel gear (1310) front and rear, A threaded sleeve (1311) is provided at one end of the two sixth bevel gears (1310) that are close to each other, and the other end of the threaded sleeve (1311) is threadedly connected to a threaded rod (1312), and a clamping block (1315) is provided at the other end of the threaded rod (1312) corresponding to the connecting rod (12), and a fourth bearing (1313) is provided on the threaded sleeve (1311), and a vertical plate (1314) is provided on the fourth bearing (1313), and the lower end of the vertical plate (1314) is fixedly connected to the limit plate (1307), and a sliding rod (1316) that penetrates the vertical plate (1314) is provided at one end of the two clamping blocks (1315) that are away from each other, and the sliding rod (1316) is slidably connected to the vertical plate (1314).

2. The double limit protection structure of a vertical shaft construction hoist according to claim 1 is characterized in that: The ends of the two moving blocks (1106) that are away from each other are symmetrically provided with first friction pulleys (1109) in the upper and lower parts, the ends of the two fixed plates (1102) that are away from each other are symmetrically provided with fixing rods (1110) in the front and rear parts, the other ends of the fixing rods (1110) are provided with connecting plates (1111), and the ends of the two connecting plates (1111) that are close to each other are provided with second friction pulleys (1112) corresponding to the first friction pulleys (1109), and the second friction pulleys (1112) are in contact with the connecting rods (12).

3. The double limit protection structure of a vertical shaft construction hoist according to claim 1 is characterized in that: The buffer assembly (9) comprises a bottom plate (901), a slide plate (902), a buffer plate (903), a slide groove (904) and a spring (905). The lower end of the manned cage (8) is provided with a plurality of bottom plates (901). The lower end of the bottom plate (901) is slidably connected to the slide plate (902). The lower end of the bottom plate (901) is provided with a slide groove (904) corresponding to the slide plate (902), and the lower end of the slide plate (902) is provided with a buffer plate (903).

4. The double limit protection structure of a vertical shaft construction hoist according to claim 3 is characterized in that: A plurality of springs (905) are arranged in the slide groove (904), the upper ends of the springs (905) are fixedly connected to the top of the slide groove (904), and the lower ends of the springs (905) are fixedly connected to the slide plate (902).

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