A green energy-saving emergency shear

Abstract

The present invention belongs to the technical field of continuous casting and rolling, and relates to a green and energy-saving emergency shear, comprising a transmission device and an emergency shear body; the emergency shear body comprises a mounting frame, an upper drum and a lower drum, and the upper drum and the lower drum are both connected to the transmission device; the mounting frame is provided with a vertically extending slide groove, and the upper drum and the lower drum are both slidably arranged in the slide groove; the upper drum is connected with a downward pressure mechanism, and the lower drum is connected with a lifting mechanism, and a spring group is provided between the upper drum and the lower drum. The present invention sets the upper and lower drums to be movable, and drives the lifting of the upper and lower drums through the downward pressure mechanism and the lifting mechanism, so as to accelerate the upper and lower drums in the open position, and then approach to complete shearing after the acceleration is completed; at the same time, the shear blades of the upper and lower drums are set to multiple groups, so as to meet the requirement of completing multiple shearings by rotating one circle of the drum, thereby reducing the power of the motor.

Description

Technical Field

[0001] The invention belongs to the technical field of continuous casting and rolling, and relates to a green energy-saving emergency shear. Background Art

[0002] The emergency shear is an important core equipment in the thin slab continuous casting and rolling unit. When a fault occurs, the emergency shear starts to cut the continuous steel plates into pieces, which are transported by conveyor rollers and fall into the waste collection device, thereby ensuring that the upstream equipment of the emergency shear can continue production without stopping.

[0003] Since the steel plates to be sheared have large thickness and width, the required shearing force is also very large. In the existing technical solutions, the upper and lower drums adopt a fixed structure. In order to ensure the acceleration time of the drum under the condition of high steel plate movement speed, only one set of shear blades can be equipped to shear the steel plates, which makes the motor power very high, resulting in high equipment investment cost and use cost.

[0004] Therefore, it is very necessary to explore a new green and energy-saving emergency shear, which can reduce the power demand of the transmission system and reduce the equipment investment cost and use cost while meeting the function of continuous shearing of steel plates of the existing emergency shear. Summary of the invention

[0005] In view of this, the object of the present invention is to solve the above-mentioned problem and provide a green and energy-saving emergency shear.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A green energy-saving emergency shear comprises a transmission device and an emergency shear body; the emergency shear body comprises a mounting frame, and an upper drum and a lower drum arranged up and down and rotatably arranged on the mounting frame, the upper drum and the lower drum are both connected to the transmission device, and the transmission device drives the upper drum and the lower drum to rotate;

[0008] The mounting frame is provided with a vertically extending slide groove, and the upper drum and the lower drum are both slidably arranged in the slide groove; the upper drum is connected with a downward pressing mechanism, and the lower drum is connected with a lifting mechanism, and a spring group is provided between the upper drum and the lower drum. The upper drum slides downward along the slide groove under the drive of the downward pressing mechanism, and the lower drum slides upward along the slide groove under the drive of the lifting mechanism. During shearing, the upper drum and the lower drum are increased in speed by a transmission device in a separated state. When a predetermined speed is reached, the upper drum and the lower drum overcome the elastic force of the spring group under the drive of the downward pressing mechanism and the lifting mechanism, respectively, and move toward the middle to achieve shearing of the middle steel plate;

[0009] The transmission device is provided with two output shafts, and the output speed ratio of the two output shafts is 1:1; the two output shafts are respectively connected to the upper drum and the lower drum through universal couplings to drive the upper drum and the lower drum to rotate synchronously.

[0010] Furthermore, the upper drum includes an upper rotary shaft and bearing seats disposed at both ends of the upper rotary shaft, and the lower drum includes a lower rotary shaft and bearing seats disposed at both ends of the lower rotary shaft, and both the upper rotary shaft and the lower rotary shaft are slidably matched with the slide groove through the bearing seats;

[0011] The upper rotating shaft and the lower rotating shaft are each provided with a plurality of shear blade assemblies, and the shear blade assemblies are evenly distributed on the upper rotating shaft and the lower rotating shaft in a circular shape; the upper rotating shaft and the lower rotating shaft are both connected to the transmission device; during shearing, the upper rotating shaft and the lower rotating shaft rotate simultaneously and move toward the middle, and the shear blade assemblies on the upper rotating shaft and the lower rotating shaft act on the steel plate in pairs in turn to achieve continuous shearing of the steel plate.

[0012] Furthermore, the transmission device includes a motor, a coupling with a brake disc, and a gear box which are sequentially connected in transmission; the two output shafts are arranged on the gear box; the number of the shear blade assemblies on the upper rotating shaft is the same as that on the lower rotating shaft.

[0013] Furthermore, both ends of the upper drum are provided with the pressing mechanism, and the pressing mechanism is connected to the bearing seat on the upper rotating shaft to drive the bearing seat to slide in the slide groove; the pressing mechanism and the lifting mechanism are both driven by hydraulic cylinders.

[0014] Furthermore, the lifting mechanism is provided at both ends of the lower drum; the lifting mechanism includes a hydraulic cylinder and a wedge block; the hydraulic cylinder is fixed on the mounting frame, and the wedge block is provided on the telescopic rod of the hydraulic cylinder; a wedge surface matching with the wedge block is provided on the bearing seat of the lower drum, and the wedge block matches with the wedge surface to drive the lower drum to move up and down.

[0015] Furthermore, a helical gear is fixedly provided on each of the upper drum and the lower drum; during shearing, the two helical gears mesh with each other to form a helical gear pair, which is used to reduce the rotation synchronization error between the upper drum and the lower drum. The helical gear pair is respectively installed on the transmission side of the upper and lower rotating shafts, on the one hand, to further reduce the synchronization error of the upper and lower rotating shafts caused by the two universal couplings; on the other hand, it is used to cooperate with the side clearance back pressure system to achieve the adjustment of the side clearance between the upper and lower shear blades.

[0016] Furthermore, it also includes a side clearance back pressure system, which includes a driving device, an intermediate shaft, a back pressure intermediate gear, a back pressure output gear, and a side clearance back pressure mounting frame; the side clearance back pressure mounting frame is fixedly connected to the mounting frame, and the driving device is drivingly connected to the back pressure intermediate gear;

[0017] The back pressure output gear is sleeved on the upper rotating drum and meshes with the back pressure intermediate gear. The back pressure intermediate gear is rotatably arranged on the intermediate shaft. The intermediate shaft is fixedly arranged on the side clearance back pressure mounting frame. During the process of shearing the steel plate, a certain reverse force is always applied to the upper rotating drum through the transmission of the back pressure intermediate gear, thereby eliminating the inter-tooth clearance of the helical gear pair.

[0018] Furthermore, the side clearance back pressure system also includes a side clearance intermediate gear, a threaded gear, and a pull ring; the upper rotating shaft is rotatably arranged in the bearing seat through a toroidal roller bearing; the pull ring is mounted on the upper rotating shaft and is axially fixedly connected to the upper rotating shaft; wherein, the toroidal roller bearing has self-aligning capability and allows misalignment, so the upper rotation can be slightly adjusted axially through the toroidal roller bearing.

[0019] The pull ring is provided with a thread arranged along its axial direction, and the threaded gear is sleeved on the thread; the side clearance intermediate gear is sleeved on the intermediate shaft and is rotatably connected with the intermediate shaft and arranged side by side with the back pressure intermediate gear; the side clearance intermediate gear is meshed with the threaded gear;

[0020] The driving device switches transmission between the back pressure intermediate gear and the side clearance intermediate gear. When transmitting with the side clearance intermediate gear, it drives the threaded gear to rotate, thereby driving the upper rotating shaft to move axially through the thread to achieve axial side clearance adjustment.

[0021] Furthermore, the driving device includes a gear motor, a shift fork, an input shaft, and an input gear; the input shaft is rotatably arranged on the side clearance mounting frame and is connected to the gear motor; the input gear is sleeved on the input shaft and axially slides with the input shaft, the input gear is arranged in the shift fork, the shift fork is connected with a rotating rod, and the rotating rod is rotatably connected to the side clearance mounting frame; by rotating the rotating rod, the shift fork drives the input gear to slide along the axial direction of the input shaft, so that the input gear is meshed with the side clearance intermediate gear or the back pressure intermediate gear to realize transmission switching.

[0022] Furthermore, the mounting frame includes a support and an archway arranged on the support; the upper drum and the lower drum are both arranged on the archway; the lifting mechanism is arranged on the support; the spring group is symmetrically arranged between the upper drum and the lower drum, and is used to provide an outward driving force to the upper and lower drums, thereby realizing the separation of the upper and lower drums.

[0023] The beneficial effects of the present invention are:

[0024] 1) The present invention sets the upper and lower drums to be movable, and drives the upper and lower drums to rise and fall through a pressing mechanism and a lifting mechanism, so that the upper and lower drums can be accelerated in the open position, and then close to complete shearing after the acceleration is completed; at the same time, the shear blades of the upper and lower drums are set to multiple groups, so that the drums can rotate one circle and complete multiple shearing, thereby reducing the power of the motor.

[0025] 2) The present invention sets the transmission system to dual output and proportional output, which correspond to the upper and lower drums respectively, so as to realize the synchronization of the upper and lower drums; a matching helical gear pair is set at the input end of the upper and lower drums, so as to cooperate with the side clearance back pressure system to realize the adjustment of the upper and lower shear blade clearance and the elimination of the inter-tooth clearance; finally, it realizes a significant reduction in the power demand of the transmission system, and reduces the equipment investment cost and use cost.

[0026] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0028] Figure 1 It is a cross-sectional view of the accident shear body of the present invention;

[0029] Figure 2 for Figure 1 Middle AA section view;

[0030] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0031] Figure 4 It is a schematic diagram of the structure of the side clearance back pressure system in the present invention;

[0032] Figure 5 for Figure 1 Left view of;

[0033] Figure 6 It is an overall schematic diagram of the green energy-saving emergency shear in the present invention;

[0034] Figure 7 It is the front view of the emergency shear body in the present invention.

[0035] Figure markings: 1-upper drum; 2-bevel gear; 3-mounting frame; 4-pressing mechanism; 5-lifting mechanism; 6-disc spring assembly; 7-side clearance back pressure system; 8-motor; 9-coupling with brake disc; 10-gear box; 11-universal coupling; 101-upper rotary shaft; 102-shear blade assembly; 103-bearing seat; 104-toroidal roller bearing; 31-support; 32-archway; 701-pull ring; 702-threaded gear; 703-side clearance intermediate gear; 704-intermediate shaft; 705-input shaft; 706-input gear; 707-shift fork; 708-gear motor; 709-back pressure intermediate gear; 710-back pressure output gear; 711-side clearance mounting frame; 712-rotating rod. DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0037] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0038] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] See also Figure 1 to Figure 7It is a green and energy-saving emergency shear, including a transmission device and an emergency shear body; the emergency shear body includes a mounting frame 3, and an upper drum 1 and a lower drum arranged vertically and rotatably arranged on the mounting frame 3, the upper drum 1 and the lower drum are both connected to the transmission device, and the upper drum 1 and the lower drum are driven to rotate through the transmission device.

[0040] The mounting frame 3 includes a support 31 and an archway 32 disposed on the support 31; the archway 32 is provided with a vertically extending slideway, in which the upper drum 1 and the lower drum are both slidably disposed; the upper drum 1 is connected with a pressing mechanism 4, and the lower drum is connected with a lifting mechanism 5, the pressing mechanism 4 is fixedly mounted on the archway 32, and the lifting mechanism 5 is mounted on the support 31. A disc spring group 6 is provided between the upper drum 1 and the lower drum, and the disc spring group 6 is symmetrically arranged between the upper drum 1 and the lower drum, and is used to provide an outward driving force to the upper and lower drums, thereby realizing the separation of the upper and lower drums.

[0041] The upper drum 1 slides downward along the slide groove under the drive of the downward pressure mechanism 4, and the lower drum slides upward along the slide groove under the drive of the lifting mechanism 5. During shearing, the upper drum 1 and the lower drum are increased in speed by the transmission device in a separated state. When the predetermined speed is reached, the upper drum 1 and the lower drum are driven by the downward pressure mechanism 4 and the lifting mechanism 5 respectively to overcome the elastic force of the disc spring group 6 and move toward the middle to achieve shearing of the middle steel plate.

[0042] The upper drum 1 includes an upper rotating shaft 101 and bearing seats 103 arranged at both ends of the upper rotating shaft 101, and the lower drum includes a lower rotating shaft and bearing seats 103 arranged at both ends of the lower rotating shaft. The upper rotating shaft 101 and the lower rotating shaft are both slidably matched with the slide groove through the bearing seats 103; four shear blade assemblies 102 are installed on the upper rotating shaft 101 and the lower rotating shaft, and the shear blade assemblies 102 are evenly distributed on the upper rotating shaft 101 and the lower rotating shaft in a circular shape; the upper rotating shaft 101 and the lower rotating shaft are both connected to the transmission device; during shearing, the upper rotating shaft 101 and the lower rotating shaft rotate at the same time and move closer to the middle, and the shear blade assemblies 102 on the upper rotating shaft 101 and the lower rotating shaft act on the steel plate in pairs in turn to achieve continuous shearing of the steel plate.

[0043] The transmission device includes a motor 8, a coupling with a brake disc 9, and a gear box 10 which are sequentially connected; the gear box 10 is provided with two output shafts, and the output speed ratio of the two output shafts is 1:1; the two output shafts are respectively connected to the upper drum 1 and the lower drum through a universal coupling 11 to drive the upper drum 1 and the lower drum to rotate synchronously; the number of the shear blade assemblies 102 on the upper rotating shaft 101 is the same as that on the lower rotating shaft.

[0044] Among them, both ends of the upper drum 1 are provided with a pressing mechanism 4, which is connected to the bearing seat 103 on the upper rotating shaft 101, driving the bearing seat 103 to slide in the slide groove; the pressing mechanism 4 and the lifting mechanism 5 are driven by hydraulic cylinders. Both ends of the lower drum are provided with a lifting mechanism 5; the lifting mechanism 5 includes a hydraulic cylinder and a wedge block; the hydraulic cylinder is fixedly mounted on the mounting frame 3, and the wedge block is fixed on the telescopic rod of the hydraulic cylinder; the bearing seat 103 of the lower drum is provided with a wedge surface that matches the wedge block, and the wedge block matches the wedge surface to drive the lower drum to move up and down.

[0045] A bevel gear 2 is fixedly installed at the input end of the upper drum 1 and the lower drum; during shearing, the two bevel gears 2 mesh with each other to form two pairs of bevel gears, which are used to further reduce the synchronization error of the upper and lower rotating shafts caused by the two universal couplings 11 on the one hand; on the other hand, they are used to cooperate with the side clearance back pressure system 7 to adjust the side clearance between the upper and lower shear blades.

[0046] In this embodiment, a side clearance back pressure system 7 is also included, which includes a driving device, an intermediate shaft 704, a back pressure intermediate gear 709, a back pressure output gear 710, and a side clearance back pressure mounting frame; the side clearance back pressure mounting frame is fixedly connected to the mounting frame 3, and the driving device is connected to the back pressure intermediate gear 709 in a transmission manner; the back pressure output gear 710 is sleeved on the upper rotating shaft 101 and meshes with the back pressure intermediate gear 709, and the back pressure intermediate gear 709 is rotatably mounted on the intermediate shaft 704; the intermediate shaft 704 is fixedly set on the side clearance back pressure mounting frame; in the process of shearing the steel plate, a certain reverse force is always applied to the upper drum 1 through the transmission of the back pressure intermediate gear 709, thereby eliminating the inter-tooth clearance of the two pairs of helical gears.

[0047] The side clearance back pressure system 7 further includes a side clearance intermediate gear 703, a threaded gear 702, and a pull ring 701; the upper rotary shaft 101 is rotatably mounted in the bearing seat 103 through a toroidal roller bearing 104; the pull ring 701 is sleeved on the upper rotary shaft 101 and is axially fixedly connected to the upper rotary shaft 101; the pull ring 701 is provided with a thread arranged along its axial direction, and the threaded gear 702 is sleeved on the thread; the side clearance intermediate gear 703 is sleeved on the intermediate shaft 704, and is rotatably connected to the intermediate shaft 704, and is arranged side by side with the back pressure intermediate gear 709; at the same time, the side clearance intermediate gear 703 is meshed with the threaded gear 702;

[0048] The driving device switches transmission between the back pressure intermediate gear 709 and the side clearance intermediate gear 703. When transmitting with the side clearance intermediate gear 703, it drives the threaded gear 702 to rotate, thereby driving the upper rotating shaft 101 to move axially through the thread to achieve axial side clearance adjustment.

[0049] The driving device includes a gear motor 708, a shift fork 707, an input shaft 705, and an input gear 706; the input shaft 705 is rotatably arranged on a side clearance mounting frame 711 and is connected to the gear motor 708; the input gear 706 is sleeved on the input shaft 705 and axially slides with the input shaft 705, the input gear 706 is arranged in the shift fork 707, a rotating rod 712 is connected to the shift fork 707, and the rotating rod 712 is rotatably arranged outside the side clearance mounting frame 711; by rotating the rotating rod 712, the shift fork 707 drives the input gear 706 to slide axially along the input shaft 705, so that the input gear 706 is meshed with the side clearance intermediate gear 703 or the back pressure intermediate gear 709 to realize the switching of the transmission.

[0050] Working process:

[0051] First, the gear motor 708 adjusts the side clearance between the upper drum 1 and the lower drum according to the thickness of the incoming steel plate, and adjusts the input gear 706 to the meshing position with the side clearance intermediate gear 703 through the rotating rod 712. The side clearance intermediate gear 703 drives the pull ring 701 to move through the threaded gear 702 to adjust the side clearance between the upper drum 1 and the lower drum to the set value; then the input gear 706 is adjusted to the meshing position with the back pressure intermediate gear 709; when the equipment downstream of the accident shear fails, the motor 8 starts immediately to drive the upper drum 1 and the lower drum to rotate simultaneously, and the gear motor 708 starts at the same time to apply a certain reverse force to the upper rotating shaft 101 to eliminate the inter-tooth clearance; when the rotation speed of the upper drum 1 and the lower drum reaches the set value, the pressing mechanism and the lifting mechanism 5 respectively drive the upper drum 1 and the lower drum to overcome the elastic force of the disc spring group 6 and move closer to the middle to achieve continuous shearing of the steel plate. When the accident is handled, the pressing mechanism and the lifting mechanism 5 are retracted respectively, and the upper drum 1 and the lower drum are opened outward under the elastic force of the disc spring group 6, and the motor 8 and the gear motor 708 stop working.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A green and energy-saving emergency shear, characterized by: It comprises a transmission device and an emergency shear body; the emergency shear body comprises a mounting frame, and an upper drum and a lower drum which are arranged up and down and are rotatably arranged on the mounting frame, and the upper drum and the lower drum are both connected to the transmission device, and the transmission device drives the upper drum and the lower drum to rotate; The mounting frame is provided with a vertically extending slide groove, and the upper drum and the lower drum are both slidably arranged in the slide groove; the upper drum is connected with a downward pressing mechanism, and the lower drum is connected with a lifting mechanism, and a spring group is provided between the upper drum and the lower drum. The upper drum slides downward along the slide groove under the drive of the downward pressing mechanism, and the lower drum slides upward along the slide groove under the drive of the lifting mechanism. During shearing, the upper drum and the lower drum are increased in speed by a transmission device in a separated state. When a predetermined speed is reached, the upper drum and the lower drum overcome the elastic force of the spring group under the drive of the downward pressing mechanism and the lifting mechanism, respectively, and move toward the middle to achieve shearing of the middle steel plate; The transmission device is provided with two output shafts, and the output speed ratio of the two output shafts is 1:1; the two output shafts are respectively connected to the upper drum and the lower drum through universal couplings to drive the upper drum and the lower drum to rotate synchronously; The upper rotary drum comprises an upper rotary shaft and bearing seats arranged at both ends of the upper rotary shaft, and the lower rotary drum comprises a lower rotary shaft and bearing seats arranged at both ends of the lower rotary shaft, and the upper rotary shaft and the lower rotary shaft are both slidably matched with the slide groove through the bearing seats; The upper and lower rotating shafts are each provided with a plurality of shear blade assemblies, and the shear blade assemblies are uniformly distributed on the upper and lower rotating shafts in a circumferential manner; the upper and lower rotating shafts are both connected to the transmission device; during shearing, the upper and lower rotating shafts rotate simultaneously and move toward the middle, and the shear blade assemblies on the upper and lower rotating shafts act on the steel plates in pairs in turn to achieve continuous shearing of the steel plates; both ends of the upper rotating drum are provided with the pressing mechanism, and the pressing mechanism is connected to the bearing seat on the upper rotating shaft to drive the bearing seat to slide in the slide groove; the pressing mechanism and the lifting mechanism are both driven by hydraulic cylinders; a helical gear is fixedly provided on the upper and lower rotating drums; during shearing, the two helical gears mesh with each other to form a helical gear pair, which is used to reduce the rotation synchronization error between the upper and lower rotating drums; The green energy-saving emergency shear also includes a side clearance back pressure system, which includes a drive device, an intermediate shaft, a back pressure intermediate gear, a back pressure output gear, and a side clearance back pressure mounting frame; the side clearance back pressure mounting frame is fixedly connected to the mounting frame, and the drive device is drivingly connected to the back pressure intermediate gear; The back pressure output gear is sleeved on the upper drum and meshes with the back pressure intermediate gear, and the back pressure intermediate gear is rotatably arranged on the intermediate shaft; the intermediate shaft is fixedly arranged on the side clearance back pressure mounting frame; In the process of shearing the steel plate, a certain reverse force is always applied to the upper drum through the back pressure intermediate gear transmission, thereby eliminating the inter-tooth clearance of the helical gear pair; the side clearance back pressure system also includes a side clearance intermediate gear, a threaded gear, and a pull ring; the upper rotary shaft is rotatably arranged in the bearing seat through a toroidal roller bearing; the pull ring is fitted on the upper rotary shaft and is axially fixedly connected to the upper rotary shaft; The pull ring is provided with a thread arranged along its axial direction, and the threaded gear is sleeved on the thread; the side clearance intermediate gear is sleeved on the intermediate shaft and is rotatably connected with the intermediate shaft and arranged side by side with the back pressure intermediate gear; the side clearance intermediate gear is meshed with the threaded gear; The driving device switches transmission between the back pressure intermediate gear and the side clearance intermediate gear. When transmitting with the side clearance intermediate gear, it drives the threaded gear to rotate, thereby driving the upper rotating shaft to move axially through the thread to achieve axial side clearance adjustment.

2. The green and energy-saving emergency shear according to claim 1 is characterized by: The transmission device comprises a motor, a coupling with a brake disc, and a gear box which are sequentially connected in transmission; the two output shafts are arranged on the gear box; the number of the shear blade assemblies on the upper rotating shaft is the same as that on the lower rotating shaft.

3. The green and energy-saving emergency shear according to claim 1 is characterized by: The lifting mechanism is provided at both ends of the lower drum; the lifting mechanism includes a hydraulic cylinder and a wedge block; the hydraulic cylinder is fixed on the mounting frame, and the wedge block is provided on the telescopic rod of the hydraulic cylinder; a wedge surface matching with the wedge block is provided on the bearing seat of the lower drum, and the lower drum is driven to move up and down through the cooperation between the wedge block and the wedge surface.

4. The green and energy-saving emergency shear according to claim 1 is characterized by: The driving device includes a gear motor, a shift fork, an input shaft, and an input gear; the input shaft is rotatably arranged on the side clearance mounting frame and is connected to the gear motor; the input gear is sleeved on the input shaft and axially slides with the input shaft, the input gear is arranged in the shift fork, the shift fork is connected with a rotating rod, and the rotating rod is rotatably connected to the side clearance mounting frame; by rotating the rotating rod, the shift fork drives the input gear to slide along the axial direction of the input shaft, so that the input gear is meshed with the side clearance intermediate gear or the back pressure intermediate gear to realize the transmission switching.

5. The green and energy-saving emergency shear according to claim 1 is characterized by: The installation frame comprises a support and an archway arranged on the support; the upper rotating drum and the lower mounting are both arranged on the archway; and the lifting mechanism is arranged on the support.

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