CN114260390A

CN114260390A - Bar shear with parallel and level cut

Info

Publication number: CN114260390A
Application number: CN202111433097.1A
Authority: CN
Inventors: 贾向平
Original assignee: Jiangsu Maifute Building Intelligence Research Institute Co ltd
Current assignee: Pizhou Xingyuan Enterprise Management Service Co., Ltd.
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-04-01

Abstract

The invention relates to the technical field of building material machining, and discloses a steel bar shearing machine with parallel and level notches, which comprises a base, wherein a thread telescopic support frame is rotatably connected to the upper left of the base, a cutting table is fixedly connected to the upper side of the thread telescopic support frame, a cutting assembly is rotatably connected to the outer side of the cutting table, a transmission assembly is fixedly connected to the upper right of the base, a gear set is fixedly connected to the left side of the transmission assembly, a steel bar is rotatably connected to the interior of the transmission assembly, and a motor is fixedly mounted on the right side of the transmission assembly. This bar shear of incision parallel and level, through at separation blade center installation micro motor, micro motor's pivot key-type connection is in the axle center direction of two blades for cutting knife tackle self slew velocity through effectively reducing the used time of blade cutting reinforcing bar, is the more parallel and level of reinforcing bar incision, reduces the workman and draws the risk of hindering the hand because of the reinforcing bar incision is not the parallel and level.

Description

Bar shear with parallel and level cut

Technical Field

The invention relates to the technical field of building material machining, in particular to a steel bar shearing machine with level notches.

Background

The steel bar shearing machine is a tool used for shearing steel bars, is mainly used for cutting steel bars in a civil engineering in a fixed length mode, is indispensable equipment for a steel bar processing link, and has the advantages of light weight, low energy consumption, reliable work, high efficiency and the like compared with other equipment, so that the steel bar shearing machine is widely applied to the field of mechanical processing.

At present civil engineering, reinforcing bar production line etc. all need be equipped with bar shear, and prior art is not parallel and level at bar shear during operation reinforcing bar shear, easily fish tail workman's hand, more serious needs secondary operation even, and the sweeps flies in disorder, and the blade is worked for a long time and is heated up and all can damage equipment. In order to overcome the technical defects, a steel bar shearing machine with a flush notch is provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the steel bar shearing machine with the parallel and level cut, which has the advantages of parallel and level cut of the sheared steel bars, fixed guidance of scraps, automatic air induction and cooling of blades and the like, and solves the defects that the steel bar cut is not parallel and level when the steel bar shearing machine works, the hands of workers are easily scratched, the secondary processing is more serious, the scraps fly in a mess, the temperature rise of the blades due to long-time work can damage equipment and the like in the prior art.

(II) technical scheme

In order to realize the aims of leveling the cut of the sheared steel bar, fixing and guiding the scraps and automatically inducing air and cooling the blade, the invention provides the following technical scheme: the utility model provides a bar shear of incision parallel and level, includes the base, the upper left side of base is rotated and is connected with screw thread telescopic support frame, screw thread telescopic support frame's top fixedly connected with cutting bed, the outside of cutting bed is rotated and is connected with cutting assembly, the upper right side fixedly connected with transmission assembly of base, transmission assembly's left side fixedly connected with gear train, transmission assembly's inside is rotated and is connected with the reinforcing bar, transmission assembly's right side fixed mounting has the motor.

Preferably, the threaded telescopic support frame consists of two parts: the thread telescopic rod is formed by combining two rods with different thicknesses, the upper rod is an internal thread, the lower rod is designed to be an external thread, and the upper rod is sleeved above the lower rod in a threaded manner.

Preferably, the left end of the cutting table is fixedly connected with a limiting column in an inserting mode, and the right end of the cutting table is made of hard metal.

The cutting assembly mainly comprises a driving wheel, a convex disc, a cutter shaft, a positioning chute and a cutting knife group; the outer ring of the driving wheel is fixedly connected with a convex disc, the outer side of the convex disc is rotatably connected with a cutter shaft, the tail end of the cutter shaft is fixedly connected with a positioning chute, and the head end of the cutter shaft is fixedly connected with a cutting knife group; the cutting knife set is provided with two blades and two blocking pieces, and also comprises the blocking pieces, an air induction port, a heat dissipation hole, a micro motor, a shaft groove, the blades, a buckle and a sawtooth knife head; the induced air mouth has been seted up to the outer lane of separation blade, the louvre has been seted up at the middle part of separation blade, the draw-in groove has been seted up at the separation blade center, separation blade central point puts and is provided with micro motor, the inside joint of two separation blades has two blades that size, shape, material are the same, the buckle has been seted up at the center of blade, the outer lane fixedly connected with sawtooth tool bit of blade.

Preferably, a rotating shaft of the driving wheel is rotatably inserted into the cutting table, and a section of the rotating shaft, which is far away from the driving wheel, is rotatably connected with a gear set; the positioning sliding groove is connected with the limiting column at the left end of the cutting table in a sliding mode.

Preferably, the air is introduced through the air inlet, and the introduced cold air dissipates the temperature generated by the blades through the heat dissipation holes, so that the temperature of the blades is reduced through cooling; the two blades are arranged, and a small gap is formed between the two blades so as to fix the trend of waste scraps generated by cutting.

The transmission assembly mainly comprises a support frame, a support spring, a first rolling shaft support plate, a first rolling shaft, a first roller, a hinge, a suspension spring, a second rolling shaft support plate, a second rolling shaft and a second roller; the bottom fixedly connected with supporting spring of support frame, the first roller bearing backup pad of fixedly connected with of support frame is kept away from to supporting spring, the middle part of first roller bearing backup pad is rotated and is pegged graft and has been had first roller bearing, the outside key-type connection of first roller bearing has first gyro wheel, the upper right side of first roller bearing backup pad is rotated and is connected with the hinge, the upper end of hinge is rotated and is connected with second roller bearing backup pad, the upper end fixedly connected with suspension spring of second roller bearing backup pad, the middle part key-type connection of second roller bearing backup pad has the second roller bearing, the outside key-type connection of second roller bearing has the second gyro wheel.

Preferably, two sliding grooves with the same size are formed in the supporting plate, a supporting spring and a suspension spring are fixedly connected in each sliding groove, and the sliding grooves can be used for the supporting plate to move up and down; the hinge is formed by hinging three sections, and the length of the hinge can be changed along with the change of the distance between the first roller supporting plate and the second roller supporting plate.

Preferably, the bottom end of the supporting plate is fixedly connected to the base; the motor rotating shaft is connected with two gears in a key mode, and the two gears drive the first rolling shaft and the second rolling shaft to rotate through the crawler belts respectively; and one ends of the first rolling shaft and the second rolling shaft, which are far away from the crawler belt, are fixedly connected with a gear set.

(III) advantageous effects

Compared with the prior art, the invention provides the steel bar shearing machine with the parallel and level cut, which has the following beneficial effects:

1. this bar shear of incision parallel and level through at separation blade center installation micro motor, micro motor's pivot key-type connection is in the axle center of two blades for cutting knife tackle self slew velocity reduces the time of blade cutting reinforcing bar, is the more parallel and level of reinforcing bar incision, reduces the workman and scratches the risk of hindering the hand because of the not parallel and level of reinforcing bar incision.

2. This bar shear of incision parallel and level through seting up the induced air mouth in the outer lane of separation blade, and the induced air mouth can introduce a large amount of cold wind when cutting tool rotates fast, and the high temperature that produces with blade work is passed through the louvre and is dispersed, has avoided damaging equipment because of cutting tool high temperature, can more effectual extension equipment life.

3. This bar shear of incision parallel and level has small gap through being provided with in the middle of two blade cutting blades, and the sweeps that produces at the cutting process reduces inside for the inside pressure of slit because of the blade fast turn, makes the sweeps pass through in the middle of two blades, makes the sweeps go to fixed cleaning of changing, avoids flying in disorder because of the sweeps influence equipment sensitivity and work efficiency.

Drawings

FIG. 1 is a schematic view of a front view structure according to the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is an enlarged schematic view of a cutting assembly according to the present invention;

FIG. 4 is an enlarged schematic view of a cutting tool according to the present invention;

FIG. 5 is an enlarged schematic view of a transmission assembly according to the present invention;

in the figure: 1. a base; 2. a threaded telescopic support frame; 3. cutting table; 4. a cutting assembly; 5. a transmission assembly; 6. a gear set; 7. reinforcing steel bars; 8. a motor; 41. a driving wheel; 42. a raised disk; 43. a cutter shaft; 44. positioning the chute; 45. a cutting knife set; 451. a baffle plate; 452. an air inducing port; 453. heat dissipation holes; 454. a card slot; 455. a micro motor; 456. a blade; 457. buckling; 458. a serrated bit; 501. a support frame; 502. a support spring; 503. a first roller support plate; 504. a first roller; 505. a first roller; 506. a hinge; 507. a suspension spring; 508. a second roller support plate; 509. a second roller; 510. a second roller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-4, a steel bar shearing machine with parallel and level cut comprises a base 1, wherein a thread telescopic support frame 2 is rotatably connected to the upper left of the base 1, and the thread telescopic support frame 2 comprises two parts: the thread telescopic rod comprises a thread telescopic rod body and a supporting seat, wherein the thread telescopic rod body is formed by combining two rods with different thicknesses, the upper rod is an internal thread, the lower rod is designed into an external thread, the thread of the upper rod is sleeved above the lower rod, a cutting table 3 is fixedly connected above a thread telescopic supporting frame 2, a limiting column is fixedly inserted at the left end of the cutting table 3, the right end of the cutting table 3 is made of hard metal, the outer side of the cutting table 3 is rotatably connected with a cutting assembly 4, a transmission assembly 5 is fixedly connected to the upper right of a base 1, a gear set 6 is fixedly connected to the left side of the transmission assembly 5, the gear set 6 consists of three rotating shafts of three gears, a reinforcing steel bar 7 is rotatably connected inside the transmission assembly 5, and a motor 8 is fixedly installed at the right side of the transmission assembly 5; the cutting assembly 4 mainly comprises a driving wheel 41, a convex disc 42, a cutter shaft 43, a positioning chute 44 and a cutting knife group 45; the outer ring of the driving wheel 41 is fixedly connected with a convex disc 42, a rotating shaft of the driving wheel 41 is rotatably inserted into the cutting table 3, one section of the rotating shaft, which is far away from the driving wheel 41, is rotatably connected with a gear set 6, the outer side of the convex disc 42 is rotatably connected with a cutter shaft 43, the tail end of the cutter shaft 43 is fixedly connected with a positioning chute 44, the positioning chute 44 is slidably connected with a limiting column at the left end of the cutting table 3, the limiting column plays a role in fixing the cutter shaft 43 through the positioning chute 44, and the head end of the cutter shaft 43 is fixedly connected with a cutting knife group 45; the cutting knife set 45 is provided with two blades 456 and two blocking pieces 451, and further comprises the blocking pieces 451, an air induction opening 452, a heat dissipation hole 453, a clamping groove 454, a micro motor 455, blades 456, a buckle 457 and a sawtooth knife head 458; suction opening 452 has been seted up to the outer lane of separation blade 451, suction opening 452 is equipped with a plurality ofly altogether, even distribution is in the separation blade 451 outer lane, louvre 453 has been seted up at the middle part of separation blade 451, draw-in groove 454 has been seted up at the separation blade 451 center, draw-in groove 454 central point puts and is provided with micro motor 455, the inside joint of two separation blades 451 has two sizes, the shape, two blades 456 that the material is all the same, introduce wind through suction opening 452, the temperature that blade 456 produced is scattered through louvre 453 with the cold wind of introduction, thereby the cooling reduces the temperature of blade 456, blade 456 is provided with two altogether, there is very little gap between two blades 456, be for the sweeps trend that the fixed cutting produced, buckle 457 has been seted up at the center of blade 456, blade 456's outer lane fixedly connected with sawtooth tool bit 458.

Example two:

referring to fig. 1, 2 and 5, a steel bar shearing machine with parallel and level cut comprises a base 1, wherein a thread telescopic support frame 2 is rotatably connected to the upper left of the base 1, and the thread telescopic support frame 2 comprises two parts: the thread telescopic rod comprises a thread telescopic rod body and a supporting seat, wherein the thread telescopic rod body is formed by combining two rods with different thicknesses, the upper rod is an internal thread, the lower rod is designed into an external thread, the thread of the upper rod is sleeved above the lower rod, a cutting table 3 is fixedly connected above a thread telescopic supporting frame 2, a limiting column is fixedly inserted at the left end of the cutting table 3, the right end of the cutting table 3 is made of hard metal, the outer side of the cutting table 3 is rotatably connected with a cutting assembly 4, a transmission assembly 5 is fixedly connected to the upper right of a base 1, a gear set 6 is fixedly connected to the left side of the transmission assembly 5, the gear set 6 consists of three rotating shafts of three gears, a reinforcing steel bar 7 is rotatably connected inside the transmission assembly 5, and a motor 8 is fixedly installed at the right side of the transmission assembly 5; the transmission assembly 5 mainly comprises a support frame 501, a support spring 502, a first roller support plate 503, a first roller 504, a first roller 505, a hinge 506, a suspension spring 507, a second roller support plate 507, a second roller 509 and a second roller 510; the bottom of the supporting frame 501 is fixedly connected with a supporting spring 502, the bottom end of the supporting frame 501 is fixedly connected to the base 1, two sliding grooves with the same size are formed in the supporting frame 501, the supporting spring 502 is fixedly connected with a first roller supporting plate 503 far away from the supporting frame 501, a first roller 504 is rotatably inserted in the middle of the first roller supporting plate 503, a first roller 505 is connected to the outer side of the first roller 504 in a key mode, a hinge 506 is rotatably connected to the upper right of the first roller supporting plate 503, the hinge 506 is formed by three sections of hinges, the length can change along with the change of the distance between the first roller supporting plate 503 and the second roller supporting plate 507, the hinge 506 is matched with the supporting spring 502 and a suspension spring 508 to play a certain role in fixing and limiting for the two supporting plates, the upper end of the hinge 506 is rotatably connected with the second roller supporting plate 507, and the upper end of the second roller supporting plate 507 is fixedly connected with a suspension spring 508, the stiffness coefficient of suspension spring 508 is greater than the stiffness coefficient of supporting spring 502, inside fixedly connected with supporting spring 502 respectively of the spout of support frame 501, suspension spring 508, and the spout can supply support frame 501 to reciprocate, the middle part key connection of second roller bearing backup pad 507 has second roller 509, the key connection has two gears in the motor 8 pivot, two gears drive first roller 504 through the track respectively, second roller 509 rotates, first roller 504, the one end fixedly connected with gear train 6 of track is kept away from to second roller 509, the outside key-type connection of second roller 509 has second gyro wheel 510.

Example three:

referring to fig. 1-5, a steel bar shearing machine with parallel and level cut comprises a base 1, wherein a thread telescopic support frame 2 is rotatably connected to the upper left of the base 1, and the thread telescopic support frame 2 comprises two parts: the thread telescopic rod comprises a thread telescopic rod body and a supporting seat, wherein the thread telescopic rod body is formed by combining two rods with different thicknesses, the upper rod is an internal thread, the lower rod is designed into an external thread, the thread of the upper rod is sleeved above the lower rod, a cutting table 3 is fixedly connected above a thread telescopic supporting frame 2, a limiting column is fixedly inserted at the left end of the cutting table 3, the right end of the cutting table 3 is made of hard metal, the outer side of the cutting table 3 is rotatably connected with a cutting assembly 4, a transmission assembly 5 is fixedly connected to the upper right of a base 1, a gear set 6 is fixedly connected to the left side of the transmission assembly 5, the gear set 6 consists of three rotating shafts of three gears, a reinforcing steel bar 7 is rotatably connected inside the transmission assembly 5, and a motor 8 is fixedly installed at the right side of the transmission assembly 5; the cutting assembly 4 mainly comprises a driving wheel 41, a convex disc 42, a cutter shaft 43, a positioning chute 44 and a cutting knife group 45; the outer ring of the driving wheel 41 is fixedly connected with a convex disc 42, a rotating shaft of the driving wheel 41 is rotatably inserted into the cutting table 3, one section of the rotating shaft, which is far away from the driving wheel 41, is rotatably connected with a gear set 6, the outer side of the convex disc 42 is rotatably connected with a cutter shaft 43, the tail end of the cutter shaft 43 is fixedly connected with a positioning chute 44, the positioning chute 44 is slidably connected with a limiting column at the left end of the cutting table 3, the limiting column plays a role in fixing the cutter shaft 43 through the positioning chute 44, and the head end of the cutter shaft 43 is fixedly connected with a cutting knife group 45; the cutter set 45 is provided with two blades 456 and two blocking pieces 451, and further comprises the blocking pieces 451, an air induction opening 452, a heat dissipation hole 453, a micro motor 455, a clamping groove 454, blades 456, a buckle 457 and a sawtooth cutter head 458; an air induction port 452 is formed in the outer ring of the blocking piece 451, the air induction ports 452 are provided with a plurality of air induction ports 452, the air induction ports 452 are uniformly distributed on the outer ring of the blocking piece 451, a heat dissipation hole 453 is formed in the middle of the blocking piece 451, a clamping groove 454 is formed in the center of the blocking piece 451, a micro motor 455 is arranged in the center of the blocking piece 451, two blades 456 with the same size, shape and material are clamped in the two blocking pieces 451, air is introduced through the air induction port 452, the introduced cold air dissipates the temperature generated by the blades 456 through the heat dissipation hole 453, the temperature of the blades 456 is reduced through cooling, two blades 456 are provided, a small gap is formed between the two blades 456, the direction of waste scraps generated by cutting is fixed, a buckle 457 is formed in the center of the blades 456, and a sawtooth cutter head 458 is fixedly connected to the outer ring of the blades 456; the transmission assembly 5 mainly comprises a support frame 501, a support spring 502, a first roller support plate 503, a first roller 504, a first roller 505, a hinge 506, a suspension spring 508, a second roller support plate 508, a second roller 509 and a second roller 510; the bottom of the supporting frame 501 is fixedly connected with a supporting spring 502, the bottom end of the supporting frame 501 is fixedly connected to the base 1, two sliding grooves with the same size are formed in the supporting frame 501, the supporting spring 502 is fixedly connected with a first roller supporting plate 503 far away from the supporting frame 501, a first roller 504 is rotatably inserted in the middle of the first roller supporting plate 503, a first roller 505 is connected to the outer side of the first roller 504 in a key mode, a hinge 506 is rotatably connected to the upper right of the first roller supporting plate 503, the hinge 506 is formed by three sections of hinges, the length can change along with the change of the distance between the first roller supporting plate 503 and the second roller supporting plate 507, the hinge 506 is matched with the supporting spring 502 and a suspension spring 508 to play a certain role in fixing and limiting for the two supporting plates, the upper end of the hinge 506 is rotatably connected with the second roller supporting plate 507, and the upper end of the second roller supporting plate 507 is fixedly connected with a suspension spring 508, the stiffness coefficient of suspension spring 508 is greater than the stiffness coefficient of supporting spring 502, inside fixedly connected with supporting spring 502 respectively of the spout of support frame 501, suspension spring 508, and the spout can supply support frame 501 to reciprocate, the middle part key connection of second roller bearing backup pad 507 has second roller 509, the key connection has two gears in the motor 8 pivot, two gears drive first roller 504 through the track respectively, second roller 509 rotates, first roller 504, the one end fixedly connected with gear train 6 of track is kept away from to second roller 509, the outside key-type connection of second roller 509 has second gyro wheel 510.

The working principle is as follows: after the motor 8 starts to work, the first roller 504 and the second roller 509 are driven to rotate through the gears and the crawler belt on the shaft, a gear set 6 is fixedly connected to one end, far away from the crawler belt, of the second roller 509, the gear set 6 rotates to drive the cutting assembly 4 to move, the steel bar 7 passes through a gap between the first roller 505 and the second roller 510 and is driven to advance by the first roller 505 and the second roller 510 which rotate in opposite directions, the steel bar 7 in advancing passes through the cutting table 3, the cutting knife set 45 in the cutting assembly 4 rotates through the micro motor 455 arranged in the baffle 451 to drive the whole cutting knife set 45 to rotate, the steel bar 7 is cut off instantly when the cutting knife set 45 rotating at high speed passes through the steel bar 7, because the rotating speed of the cutting knife set 45 is high, the cutting mouth of the steel bar 7 is relatively level, two blades 456 in the cutting knife set 45 are provided, and a small gap is formed between the two blades 456, the scraps generated when cutting the reinforcing bars 7 pass through the minute gaps in the two blades 456 to form a scrap fixing guide.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cut-level bar shear, includes base (1), its characterized in that: the utility model discloses a cutting machine, including base (1), top of the left side of base (1) rotates and is connected with screw thread telescopic frame (2), the top fixedly connected with cutting bed (3) of screw thread telescopic frame (2), the outside of cutting bed (3) is rotated and is connected with cutting assembly (4), the upper right side fixedly connected with transmission assembly (5) of base (1), the left side fixedly connected with gear train (6) of transmission assembly (5), the inside of transmission assembly (5) is rotated and is connected with reinforcing bar (7), the right side fixed mounting of transmission assembly (5) has motor (8).

2. A shear according to claim 1, wherein: the thread telescopic support frame (2) is composed of two parts: the thread telescopic rod is formed by combining two rods with different thicknesses, the upper rod is an internal thread, the lower rod is designed to be an external thread, and the upper rod is sleeved above the lower rod in a threaded manner.

3. A shear according to claim 1, wherein: the left end of the cutting table (3) is fixedly connected with a limiting column in an inserting mode, and the right end of the cutting table (3) is made of hard metal.

4. A shear according to claim 1, wherein: the cutting assembly (4) mainly comprises a driving wheel (41), a raised disc (42), a cutter shaft (43), a positioning chute (44) and a cutting knife group (45); a raised disc (42) is fixedly connected to the outer ring of the driving wheel (41), a cutter shaft (43) is rotatably connected to the outer side of the raised disc (42), a positioning chute (44) is fixedly connected to the tail end of the cutter shaft (43), and a cutting knife group (45) is fixedly connected to the head end of the cutter shaft (43); the cutting knife set (45) is provided with two blades (456) and two blocking pieces (451) in common, and further comprises the blocking pieces (451), an air induction opening (452), a heat dissipation hole (453), a clamping groove (454), a micro motor (455), the blades (456), a buckle (457) and a sawtooth knife head (458); the air induction opening (452) has been seted up to the outer lane of separation blade (451), louvre (453) have been seted up at the middle part of separation blade (451), draw-in groove (454) have been seted up at separation blade (451) center, separation blade (451) central point puts and is provided with micro motor (455), the inside joint of two separation blades (451) has two equal blade (456) of size, shape, material, buckle (457) have been seted up at the center of blade (456), the outer lane fixedly connected with sawtooth tool bit (458) of blade (456).

5. A shear according to claim 1 or claim 4, wherein: a rotating shaft of the driving wheel (41) is rotatably inserted in the cutting table (3), and a section of the rotating shaft, which is far away from the driving wheel (41), is rotatably connected with a gear set (6); the positioning sliding groove (44) is connected with the limiting column at the left end of the cutting table (3) in a sliding manner.

6. A shear according to claim 4, wherein: the air is introduced through the air inlet (452), and the introduced cold air is used for dissipating the temperature generated by the blade (456) through the heat dissipation hole (453), so that the temperature of the blade (456) is reduced through cooling; the two blades (456) are arranged, and a small gap is formed between the two blades (456) so as to fix the direction of waste scraps generated by cutting.

7. A shear according to claim 1, wherein: the transmission assembly (5) mainly comprises a support frame (501), a support spring (502), a first roller support plate (503), a first roller (504), a first roller (505), a hinge (506), a second roller support plate (507), a suspension spring (508), a second roller (509) and a second roller (510); the bottom fixedly connected with supporting spring (502) of support frame (501), the first roller bearing backup pad of fixedly connected with (503) of support frame (501) is kept away from supporting spring (502), the middle part of first roller bearing backup pad (503) is rotated and is pegged graft and has first roller bearing (504), the outside key-type connection of first roller bearing (504) has first gyro wheel (505), the upper right side of first roller bearing backup pad (503) is rotated and is connected with hinge (506), the upper end of hinge (506) is rotated and is connected with second roller bearing backup pad (507), the upper end fixedly connected with suspension spring (508) of second roller bearing backup pad (507), the middle part key-type connection of second roller bearing backup pad (507) has second roller bearing (509), the outside key-type connection of second roller bearing (509) has second gyro wheel (510).

8. A shear according to claim 1 or claim 7, wherein: two sliding grooves with the same size are formed in the supporting frame (501), a supporting spring (502) and a suspension spring (508) are fixedly connected to the insides of the sliding grooves respectively, and the sliding grooves can be used for the supporting plate to move up and down; the hinge (506) is formed by hinging three sections, and the length can be changed along with the change of the distance between the first roller supporting plate (503) and the second roller supporting plate (507).

9. A shear according to claim 1 or claim 7, wherein: the bottom end of the support frame (501) is fixedly connected to the base (1); two gears are connected to a rotating shaft of the motor (8) in a key mode, and the two gears drive the first rolling shaft (504) and the second rolling shaft (509) to rotate through the crawler belts respectively; and one ends of the first roller (504) and the second roller (509) far away from the crawler belt are fixedly connected with a gear set (6).