Hydraulic shear

Abstract

The utility model relates to a hydraulic shear, which belongs to the field of hydraulic shears and comprises a frame, a shearing mechanism and a pressing mechanism, the shearing mechanism and the pressing mechanism are distributed on the frame front and back, the pressing mechanism is used for fixing and clamping materials, and the shearing mechanism comprises an upper cutter mounting seat and a lower cutter mounting seat which are distributed up and down. The lower cutter mounting seat is fixedly arranged on the machine frame, a lower cutter body is mounted on the lower cutter mounting seat, the upper cutter mounting seat is driven by a shearing oil cylinder to ascend and descend, an upper cutter body is mounted at the bottom of the upper cutter mounting seat, the downward projection of the upper cutter body is matched with the downward projection of the lower cutter body, and the upper cutter body is located on the front side of the lower cutter body. The two upper front cutters, the two upper middle cutters, the two lower front cutters and the two lower middle cutters are distributed in a bilateral symmetry mode, the upper cutter body and the lower cutter body bear bilaterally-symmetrical torques during shearing and counteract the bilaterally-symmetrical torques, the effect of protecting the upper cutter body and the lower cutter body is achieved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a hydraulic shear, belonging to the field of hydraulic shears. Background Art

[0002] Hydraulic shears are suitable for metal recycling plants, scrap car dismantling yards, smelting and casting industries. They can perform cold shearing and flanging of various shapes of steel and various metal materials, as well as press forming of powder products, plastics, fiberglass, insulation materials, and rubber. The most commonly used metal shears are crocodile shears and gantry shears. Gantry shears are hydraulically driven. Compared with mechanical transmission shears, they have the characteristics of small size, light weight, small motion inertia, low noise, stable movement, flexible operation, and large shearing section.

[0003] The Chinese utility model patent with the announcement number CN219818203U discloses a gantry shear for scrap steel, comprising a bottom plate, a clamping assembly fixedly installed on the top of the placement frame, clamping plates fixedly installed on both sides of the top of the clamping assembly, and a driving assembly fixedly installed on the bottom of the support frame. The utility model starts the clamping assembly through the design of the placement frame, the clamping assembly and the clamping plate. When the clamping assembly is in use, the two clamping plates are driven to approach each other, thereby clamping and fixing the back side of the scrap steel on the top of the bottom plate, so that the scrap steel is not easy to shake during the shearing process, which is more convenient when used. Through the design of the wall plate and the top plate, the hydraulic rod is supported. Through the design of the hydraulic rod and the placement plate, the hydraulic rod drives the placement plate to move up and down when in use. The cutter body is installed at the bottom of the placement plate and moves with the placement plate, thereby shearing the front side of the scrap steel clamped and fixed on the top of the bottom plate. However, in the prior art, during the shearing process, since the shearing surface of the cutter body is inclined to one side, the cutter body is susceptible to unidirectional torque during shearing, which may cause damage to the cutter body and shorten its service life.

[0004] Therefore, there is a need for a hydraulic shear that can offset the torque applied to the cutter body during shearing and extend its service life. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, a hydraulic shear is provided which can offset the torque applied to the cutter body during shearing and prolong the service life.

[0006] The technical solution adopted by the utility model to solve the above-mentioned problems is: a hydraulic shear, comprising a frame, a shearing mechanism and a material pressing mechanism, the shearing mechanism and the material pressing mechanism are distributed on the frame front and back, the material pressing mechanism is used to realize fixed clamping of materials, the shearing mechanism comprises an upper knife mounting seat and a lower knife mounting seat distributed up and down, the lower knife mounting seat is fixedly arranged on the frame, a lower knife body is mounted on the lower knife mounting seat, the upper knife mounting seat is driven to rise and fall by a shearing oil cylinder, an upper knife body is mounted on the bottom of the upper knife mounting seat, the downward projection of the upper knife body matches the downward projection of the lower knife body, the upper knife body is located at the front side of the lower knife body, the bottom height of the upper knife body gradually increases from back to front, the bottom height of the upper knife body gradually decreases from the middle to the left and right sides, and the upper knife body is symmetrical about the vertical center line of the upper knife mounting seat;

[0007] A strip-shaped groove is provided on the rear side of the upper knife mounting seat, and the groove extends to the top and bottom of the upper knife mounting seat;

[0008] The upper knife body includes an upper rear knife, two upper middle knives and two upper front knives. The upper rear knife is V-shaped, and the V-shaped opening of the upper rear knife is arranged downward. The rear side wall of the upper rear knife is in the same plane with the front inner wall of the groove. The two upper middle knives are respectively arranged at the left and right ends of the upper rear knife. The right side wall of the left upper middle knife is in the same plane with the left inner wall of the groove, and the left side wall of the right upper middle knife is in the same plane with the right side wall of the groove. The rear side wall of the upper middle knife is in the same plane with the rear side wall of the upper knife mounting seat. The two upper front knives correspond one by one to the two upper middle knives. The upper front knife is arranged on the side of the upper middle knife away from the groove, and the rear side wall of the upper front knife is in the same plane with the rear side wall of the upper knife mounting seat.

[0009] Preferably, the plane where the top of the lower knife body is located is perpendicular to the up and down direction, and the lower knife body includes a lower rear knife, two lower middle knives and two lower front knives, the two lower middle knives are distributed on the lower rear knife on the left and right, and the two lower front knives are connected to the two lower middle knives one by one.

[0010] Preferably, the left and right sides of the upper knife body extend to the left and right sides of the upper knife mounting seat respectively.

[0011] Preferably, the pressing mechanism comprises a pressing head, which is driven to rise and fall by a pressing cylinder, and a cylinder body of the pressing cylinder is fixedly arranged on a bracket.

[0012] Preferably, a strip-shaped protrusion is provided on the front side of the pressing head, the protrusion is inserted into the groove, the protrusion is slidably connected to the groove up and down, the left and right side walls of the protrusion are respectively fitted with the left and right side inner walls of the groove, and a gap is provided between the front side wall of the protrusion and the front inner wall of the groove.

[0013] Preferably, the frame is further provided with two blocking mechanisms, which are respectively arranged on the left and right sides of the upper knife mounting seat;

[0014] The blocking mechanism includes a slider, a side baffle, a front baffle and a rear baffle, the slider is fixedly arranged on the upper knife mounting seat, the side baffle is fitted with a side of the slider away from the upper knife mounting seat, the front baffle is fitted with the front side of the slider, and the rear baffle is fitted with the rear side of the slider, the side baffle and the rear baffle are both fixedly connected to the frame, the front side of the front baffle is connected to the frame through an adjusting component, and the front and rear direction position of the front baffle can be adjusted by the adjusting component.

[0015] Preferably, the adjustment assembly includes a baffle frame and a fixing plate, the baffle frame is fixedly arranged on the front side of the front baffle plate, the left and right sides of the baffle frame are respectively fitted with the frame and the upper knife mounting seat, the baffle frame is provided with a locking hole, the locking holes are provided with locking pieces, the baffle frame is detachably fixedly connected to the frame via the locking pieces, the fixing plate is fixedly arranged on the frame, the rear side of the fixing plate is inclined forward from top to bottom, and an adjustment plate is fixedly arranged on the baffle frame, the adjustment plate is fitted with the front side of the fixing plate.

[0016] Preferably, the locking holes are provided in plurality, and the plurality of locking holes are distributed from top to bottom.

[0017] Preferably, a plurality of ribs are fixedly provided on the retaining frame, and the plurality of ribs are arranged from top to bottom.

[0018] Preferably, the frame includes an upper beam, a lower beam and two wall panels, the two wall panels are distributed left and right, the upper beam and the lower beam are distributed up and down between the two wall panels, the left and right sides of the upper beam are respectively fixedly connected to the two wall panels, and the left and right sides of the lower beam are respectively fixedly connected to the two wall panels.

[0019] Compared with the prior art, the advantages of the utility model are:

[0020] The utility model discloses a hydraulic shear, which distributes two upper front knives, two upper middle knives, two lower front knives and two lower middle knives symmetrically on the left and right. When the upper knife body and the lower knife body are sheared, they are subjected to torques symmetrically on the left and right and offset each other, thereby protecting the upper knife body and the lower knife body and extending their service life. In addition, with the upper knife body distributed in this way, shearing is more stable, the force is more evenly applied, the knife is not easily stuck, the material sheared is smaller, secondary shearing is avoided, and work efficiency is improved. Moreover, when the front-to-back direction of the upper knife body is adjusted, the sliding block is driven to move back and forth by the deadweight of the blocking frame, so that the upper knife body can move in the front-to-back direction, thereby improving convenience. Moreover, the force generated during the shearing process is concentrated on the fixed plate, which reduces the force on the locking member and further extends the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of a hydraulic shear of the utility model;

[0022] Figure 2 This is a front view of a hydraulic shear of the utility model;

[0023] Figure 3 This is a rear view of a hydraulic shear of the utility model;

[0024] Figure 4 It is a schematic diagram of the connection structure between the upper knife mounting seat and the upper knife body;

[0025] Figure 5 is a three-dimensional diagram of the upper cutter body;

[0026] Figure 6 It is the main view of the upper cutter body;

[0027] Figure 7 It is the left view of the upper cutter body;

[0028] Figure 8 is a top view of the upper cutter body;

[0029] Fig. 9 It is a schematic diagram of the connection structure between the lower knife mounting seat and the lower knife body;

[0030] Fig.10 It is a three-dimensional diagram of the pressing head;

[0031] Fig.11 is a three-dimensional diagram of the lower knife body;

[0032] Fig.12 is a structural schematic diagram of a blocking mechanism;

[0033] Fig.13 for Fig.12 A magnified view of part A;

[0034] Fig.14 It is a schematic diagram of the connection structure between the fixed plate and the wall panel;

[0035] Fig.15 It is a schematic diagram of the connection structure between the fixed plate and the adjusting plate.

[0036] in:

[0037] Frame 1, shearing mechanism 2, pressing mechanism 3, blocking mechanism 4;

[0038] Upper beam 11, lower beam 12, wall panel 13;

[0039] Upper knife mounting seat 21, lower knife mounting seat 22, lower knife body 23, shearing cylinder 24, upper knife body 25, groove 26;

[0040] A lower rear knife 231, a lower middle knife 232, and a lower front knife 233;

[0041] Upper rear knife 251, upper middle knife 252, upper front knife 253;

[0042] A pressing head 31, a pressing cylinder 32, and a protrusion 33;

[0043] Slider 41, side baffle 42, front baffle 43, rear baffle 44, adjustment assembly 45;

[0044] Blocking frame 451 , fixing plate 452 , locking hole 453 , rib plate 454 , and adjusting plate 455 . DETAILED DESCRIPTION

[0045] like Figure 1-15 As shown, a hydraulic shear in this embodiment includes a frame 1, a shearing mechanism 2 and a pressing mechanism 3, wherein the frame 1 is circular, the shearing mechanism 2 and the pressing mechanism 3 are distributed on the frame 1 front and back, the pressing mechanism 3 is used to realize fixed clamping of the material, and the shearing mechanism 2 is used to perform a shearing action on the material;

[0046] The shearing mechanism 2 comprises an upper knife mounting seat 21 and a lower knife mounting seat 22, the upper knife mounting seat 21 and the lower knife mounting seat 22 are distributed up and down, the lower knife mounting seat 22 is fixedly arranged on the frame 1, a lower knife body 23 is installed on the lower knife mounting seat 22, the upper knife mounting seat 21 is driven to rise and fall by two shearing oil cylinders 24, the two shearing oil cylinders 24 are distributed left and right, the cylinder bodies of the shearing oil cylinders 24 are fixedly arranged on the frame 1, an upper knife body 25 is installed at the bottom of the upper knife mounting seat 21, the downward projection of the upper knife body 25 matches the downward projection of the lower knife body 23, the upper knife body 25 is located at the front side of the lower knife body 23, the bottom height of the upper knife body 25 gradually increases from back to front, the bottom height of the upper knife body 25 gradually decreases from the middle to the left and right sides, and the upper knife body 25 is symmetrical about the vertical center line of the upper knife mounting seat 21;

[0047] A strip-shaped groove 26 is provided on the rear side of the upper knife mounting seat 21, and the groove 26 extends to the top and bottom of the upper knife mounting seat 21;

[0048] The left and right sides of the upper blade body 25 extend to the left and right sides of the upper blade mounting seat 21 respectively;

[0049] The upper knife body 25 includes an upper rear knife 251, two upper middle knives 252 and two upper front knives 253. The upper rear knife 251 is V-shaped, and the V-shaped opening of the upper rear knife 251 is arranged downward. The rear side wall of the upper rear knife 251 and the front inner wall of the groove 26 are in the same plane. The two upper middle knives 252 are respectively arranged at the left and right ends of the upper rear knife 251. The two upper middle knives 252 are symmetrical about the upper rear knife 251. The right side wall of the left upper middle knife 252 is aligned with the groove 26. The left inner wall of the upper middle knife 252 on the right side is in the same plane, the left inner wall of the upper middle knife 252 on the right side is in the same plane with the right side wall of the groove 26, the rear side wall of the upper middle knife 252 is in the same plane with the rear side wall of the upper knife mounting seat 21, the two upper front knives 253 correspond to the two upper middle knives 252 one by one, the upper front knives 253 are arranged on the side of the upper middle knife 252 away from the groove 26, and the rear side wall of the upper front knife 253 is in the same plane with the rear side wall of the upper knife mounting seat 21;

[0050] The plane where the top of the lower blade body 23 is located is perpendicular to the up and down direction. The lower blade body 23 includes a lower rear blade 231, two lower middle blades 232 and two lower front blades 233. The two lower middle blades 232 are distributed on the lower rear blade 231, and the two lower front blades 233 are connected to the two lower middle blades 232 in a one-to-one correspondence.

[0051] The pressing mechanism 3 includes a pressing head 31, and the pressing head 31 is driven to rise and fall by two pressing cylinders 32. The two pressing cylinders 32 are distributed on the left and right, and the cylinder bodies of the pressing cylinders 32 are fixedly arranged on the bracket;

[0052] A strip-shaped protrusion 33 is provided on the front side of the pressing head 31, and the protrusion 33 is inserted into the groove 26. The protrusion 33 is slidably connected with the groove 26 up and down, and the left and right side walls of the protrusion 33 are respectively fitted with the left and right side inner walls of the groove 26, and a gap is provided between the front side wall of the protrusion 33 and the front side inner wall of the groove 26;

[0053] During the shearing process, the material enters the frame 1 from the rear side, and the material in the frame 1 is located between the upper blade body 25 and the lower blade body 23. Subsequently, after the material is fixedly clamped by the material pressing mechanism 3, the bottom of the material abuts against the lower blade body 23. After that, the shearing cylinder 24 drives the upper blade mounting seat 21 to descend, and drives the upper blade body 25 to descend and abut against the top of the material. As the upper blade body 25 continues to descend, the shearing force generated by the upper blade body 25 and the lower blade body 23 on the material is used to shear the material.

[0054] Among them, during shearing, since the bottom height of the upper knife body 25 gradually increases from the back to the front, the upper front knife 253, the upper middle knife 252 and the upper rear knife 251 perform shearing actions on the material in sequence, avoiding the upper front knife 253, the upper middle knife 252 and the upper rear knife 251 from acting on the material at the same time to affect the shearing ability, and since the two upper front knives 253, the two upper middle knives, the two lower front knives 233 and the two lower middle knives are symmetrically distributed, the upper knife body 25 and the lower knife body 23 are subjected to symmetrical torques during shearing and offset each other, which plays a role in protecting the upper knife body 25 and the lower knife body 23 and prolonging their service life. In addition, the upper knife body 25 is distributed in this way, the shearing is more stable, the force is more uniform, it is not easy to get stuck, the sheared material is smaller, secondary shearing is avoided, and the work efficiency is improved;

[0055] The frame 1 is also provided with two blocking mechanisms 4, which are respectively arranged on the left and right sides of the upper knife mounting seat 21;

[0056] The blocking mechanism 4 includes a slider 41, a side baffle 42, a front baffle 43 and a rear baffle 44. The slider 41 is fixedly arranged on the upper knife mounting seat 21, the side baffle 42 is in contact with the side of the slider 41 away from the upper knife mounting seat 21, the front baffle 43 is in contact with the front side of the slider 41, and the rear baffle 44 is in contact with the rear side of the slider 41. The side baffle 42 and the rear baffle 44 are both fixedly connected to the frame 1, and the front side of the front baffle 43 is connected to the frame 1 through an adjustment component 45, and the front and rear directions of the front baffle 43 can be adjusted by the adjustment component 45.

[0057] The adjusting assembly 45 comprises a baffle 451 and a fixing plate 452, wherein the baffle 451 is fixedly arranged at the front side of the front baffle 43, and the left and right sides of the baffle 451 are respectively fitted with the frame 1 and the upper knife mounting seat 21, and the baffle 451 is provided with a plurality of locking holes 453, and the plurality of locking holes 453 are distributed from top to bottom, and a locking member is arranged in each locking hole 453, and the baffle 451 is detachably fixedly connected to the frame 1 through the locking member, wherein the locking member can be a screw, and the baffle 451 is fixedly provided with a plurality of rib plates 454, and the plurality of rib plates 454 are arranged from top to bottom, and the strength of the baffle 451 is improved by the rib plates 454, and the fixing plate 452 is fixedly arranged on the frame 1, and the rear side of the fixing plate 452 is tilted forward from top to bottom, and the baffle 451 is fixedly provided with an adjusting plate 455, and the adjusting plate 455 is fitted with the front side of the fixing plate 452;

[0058] During the shearing process, the lifting of the upper knife mounting seat 21 drives the slider 41 to rise and fall synchronously, and the side baffles 42, the front baffle 43 and the rear baffle 44 fit with the slider 41 to guide the slider 41 to move up and down. During shearing, the upper knife body 25 drives the upper knife mounting seat 21 to be pushed in the front-to-back direction. Long-term force may easily cause a gap between the slider 41 and the rear baffle 44, causing the relative position of the upper knife body 25 and the lower knife body 23 in the front-to-back direction to deviate, thereby affecting the shearing ability. At this time, the locking piece is released, and the baffle 451 moves downward under the action of its own gravity, and passes through the inclined surface on the fixing plate 452. The adjusting plate 455 is pushed to move backward, and the movement of the adjusting plate 455 drives the front baffle plate 43 to move synchronously through the baffle frame 451, so that the front baffle plate 43 pushes the slider 41 to move backward, so that the slider 41 fits with the rear baffle plate 44, and the front-to-back position adjustment of the upper blade body 25 and the lower blade body 23 is realized. The traditional upper blade body 25 adjustment method uses a screw to drive the blocking component to adjust the position of the slider 41, which is cumbersome to operate, and the screw is subjected to excessive force, which is easy to cause the screw to be damaged. After the improvement, most of the thrust is concentrated on the fixing plate 452, which can reduce the force on the screw and further extend the service life.

[0059] The frame 1 includes an upper beam 11, a lower beam 12 and two wall panels 13, the two wall panels 13 are distributed left and right, the upper beam 11 and the lower beam 12 are distributed up and down between the two wall panels 13, the left and right sides of the upper beam 11 are fixedly connected to the two wall panels 13 respectively, the left and right sides of the lower beam 12 are fixedly connected to the two wall panels 13 respectively, the cylinder body of the shearing cylinder 24 and the cylinder body of the pressing cylinder 32 are fixedly arranged on the upper beam 11, the upper knife mounting seat 21, the lower knife mounting seat 22 and the pressing head 31 are all located between the upper beam 11 and the lower beam 12, the lower knife mounting seat 22 is fixedly arranged on the top of the upper beam 11, the left and right sides of the pressing head 31 are respectively fitted with the two wall panels 13, the two wall panels 13 correspond to the two blocking mechanisms 4 one by one, and the fixed plate 452, the side baffle 42 and the rear baffle 44 are fixedly arranged on the wall panel 13;

[0060] The front side wall of the lower beam 12 is inclined to form a material discharge slope, and the sheared material slides down the material discharge slope;

[0061] In summary, by symmetrically distributing the two upper front knives 253, the two upper middle knives, the two lower front knives 233 and the two lower middle knives, the upper knife body 25 and the lower knife body 23 are subjected to symmetrical torques during shearing and offset each other, thereby protecting the upper knife body 25 and the lower knife body 23 and extending their service life. In addition, the upper knife body 25 is distributed in this way, the shearing is more stable, the force is more uniform, the knife is not easy to get stuck, the material cut is smaller, secondary shearing is avoided, and work efficiency is improved. Moreover, when the front and rear directions of the upper knife body 25 are adjusted, the slider 41 is driven to move back and forth by the deadweight of the retaining frame 451, so that the upper knife body 25 can move in the front and rear directions, thereby improving convenience. Moreover, the force generated during the shearing process is concentrated on the fixed plate 452, which reduces the force on the locking member and further extends the service life.

[0062] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A hydraulic shear, comprising a frame (1), a shearing mechanism (2) and a material pressing mechanism (3), wherein the shearing mechanism (2) and the material pressing mechanism (3) are distributed on the frame (1) front and back, and the material pressing mechanism (3) is used to realize fixed clamping of materials, the shearing mechanism (2) comprises an upper knife mounting seat (21) and a lower knife mounting seat (22) distributed up and down, the lower knife mounting seat (22) is fixedly arranged on the frame (1), a lower knife body (23) is mounted on the lower knife mounting seat (22), the upper knife mounting seat (21) is driven to rise and fall by a shearing oil cylinder (24), an upper knife body (25) is mounted at the bottom of the upper knife mounting seat (21), a downward projection of the upper knife body (25) matches a downward projection of the lower knife body (23), and the upper knife body (25) is located at the front side of the lower knife body (23), characterized in that: The height of the bottom of the upper blade body (25) gradually increases from the back to the front, and the height of the bottom of the upper blade body (25) gradually decreases from the middle to the left and right sides, and the upper blade body (25) is symmetrical about the vertical center line of the upper blade mounting seat (21); A strip-shaped groove (26) is provided on the rear side of the upper knife mounting seat (21), and the groove (26) extends to the top and bottom of the upper knife mounting seat (21); The upper knife body (25) comprises an upper rear knife (251), two upper middle knives (252) and two upper front knives (253); the upper rear knife (251) is V-shaped, the V-shaped opening of the upper rear knife (251) is arranged downward, the rear side wall of the upper rear knife (251) and the front inner wall of the groove (26) are in the same plane, the two upper middle knives (252) are respectively arranged at the left and right ends of the upper rear knife (251), and the right side wall of the left upper middle knife (252) and the left inner wall of the groove (26) are aligned with each other. The left side wall of the upper middle knife (252) on the right side is in the same plane as the right side wall of the groove (26); the rear side wall of the upper middle knife (252) is in the same plane as the rear side wall of the upper knife mounting seat (21); the two upper front knives (253) correspond to the two middle knives one by one; the upper front knives (253) are arranged on the side of the upper middle knife (252) away from the groove (26); the rear side wall of the upper front knife (253) is in the same plane as the rear side wall of the upper knife mounting seat (21).

2. A hydraulic shear according to claim 1, characterized in that: The plane where the top of the lower knife body (23) is located is perpendicular to the up and down direction. The lower knife body (23) comprises a lower rear knife (231), two lower middle knives (232) and two lower front knives (233). The two lower middle knives (232) are distributed on the lower rear knife (231) on the left and right, and the two lower front knives (233) are connected to the two lower middle knives (232) in a one-to-one correspondence.

3. A hydraulic shear according to claim 1, characterized in that: The left and right sides of the upper knife body (25) extend to the left and right sides of the upper knife mounting seat (21) respectively.

4. A hydraulic shear according to claim 1, characterized in that: The material pressing mechanism (3) comprises a material pressing head (31), and the material pressing head (31) is driven to rise and fall by a material pressing oil cylinder (32), and the cylinder body of the material pressing oil cylinder (32) is fixedly arranged on a bracket.

5. A hydraulic shear according to claim 4, characterized in that: A strip-shaped protrusion (33) is provided on the front side of the pressing head (31), and the protrusion (33) is inserted into the groove (26). The protrusion (33) is slidably connected to the groove (26) up and down, and the left and right side walls of the protrusion (33) are respectively in contact with the left and right side inner walls of the groove (26), and a gap is provided between the front side wall of the protrusion (33) and the front side inner wall of the groove (26).

6. A hydraulic shear according to claim 1, characterized in that: The frame (1) is also provided with two blocking mechanisms (4), and the two blocking mechanisms (4) are respectively arranged on the left and right sides of the upper knife mounting seat (21); The blocking mechanism (4) comprises a slider (41), a side baffle (42), a front baffle (43) and a rear baffle (44); the slider (41) is fixedly arranged on the upper knife mounting seat (21); the side baffle (42) is in contact with a side of the slider (41) away from the upper knife mounting seat (21); the front baffle (43) is in contact with the front side of the slider (41); the rear baffle (44) is in contact with the rear side of the slider (41); the side baffle (42) and the rear baffle (44) are both fixedly connected to the frame (1); the front side of the front baffle (43) is connected to the frame (1) via an adjustment component (45); and the front and rear positions of the front baffle (43) are adjusted via the adjustment component (45).

7. A hydraulic shear according to claim 6, characterized in that: The adjustment assembly (45) comprises a baffle frame (451) and a fixing plate (452); the baffle frame (451) is fixedly arranged on the front side of the front baffle plate (43); the left and right sides of the baffle frame (451) are respectively fitted with the frame (1) and the upper knife mounting seat (21); a locking hole (453) is opened on the baffle frame (451); a locking piece is arranged in each of the locking holes (453); the baffle frame (451) is detachably fixedly connected to the frame (1) via the locking piece; the fixing plate (452) is fixedly arranged on the frame (1); the rear side of the fixing plate (452) is tilted forward from top to bottom; an adjustment plate (455) is fixedly arranged on the baffle frame (451); the adjustment plate (455) is fitted with the front side of the fixing plate (452).

8. A hydraulic shear according to claim 7, characterized in that: The locking holes (453) are provided in plurality, and the plurality of locking holes (453) are distributed from top to bottom.

9. The hydraulic shear according to claim 7, characterized in that: A plurality of rib plates (454) are fixedly disposed on the retaining frame (451), and the plurality of rib plates (454) are arranged from top to bottom.

10. The hydraulic shear according to claim 1, characterized in that: The frame (1) comprises an upper beam (11), a lower beam (12) and two wall panels (13); the two wall panels (13) are distributed left and right; the upper beam (11) and the lower beam (12) are distributed up and down between the two wall panels (13); the left and right sides of the upper beam (11) are respectively fixedly connected to the two wall panels (13); and the left and right sides of the lower beam (12) are respectively fixedly connected to the two wall panels (13).

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