A shearing machine with a protective function

Abstract

The present invention discloses a shearing machine with a protection function, comprising: a shearing machine body, at least one guard plate and an electrical limiter. The guard plate is hinged to the side wall of the shearing machine body, and the electrical limiter is fixedly connected to the side wall of the shearing machine body. It is electrically connected to the electrical control box of the shearing machine body, and a starting column for starting the electrical limiter is provided on the guard plate. By using the guard plate and the electrical limiter, the state of the guard plate can directly affect the start of the shearing machine body, ensuring that the shearing machine can only be started when the guard plate is in a protective state, avoiding the situation that there are people in the back blanking area during the start-up process of the shearing machine, and completely preventing accidents from occurring.

Description

Technical Field

[0001] The present invention relates to the technical field of plate shears, and particularly relates to a plate shear with a protection function. Background Art

[0002] The plate shear is one of the more commonly used instruments in machining. The blanking area on its back is in an open state. If a person enters this area during the operation of the plate shear, it is possible for the person to be mechanically injured. Therefore, there are certain safety hazards. In the existing safety regulations for plate shear operations, protection is usually provided on both sides of the plate shear to prevent people from entering the blanking area on the back of the plate shear. However, in actual operations, most workers do not use the protection plate because moving the protection plate back and forth affects work efficiency. Mechanical accidents caused by this occasionally occur;

[0003] To avoid the above situation, the workers install the protection plate on the side wall of the plate shear by means of hinge connection for the convenience of the workers. However, due to the low frequency of mechanical accidents and the fact that moving the protection plate back and forth does increase the workload of the workers, most workers always take chances and still abandon the use of the hinged protection plate when there is no supervision. And as safety management personnel, it is impossible to always urge the operators to correctly use the protection plate;

[0004] In view of this, there is an urgent need to solve the above problems with a plate shear having a protection function. Summary of the Invention

[0005] The purpose of the present invention is to provide a plate shear with a protection function to solve the above problems.

[0006] To achieve the above purpose, the present invention adopts the following technical solution: A plate shear with a protection function, comprising:

[0007] A plate shear body, at least one protection plate and an electrical limit switch. The protection plate is hinged on the side wall of the plate shear body. The electrical limit switch is fixedly connected to the side wall of the plate shear body, and it is electrically connected to the electrical control box of the plate shear body through a circuit. And a starting column for starting the electrical limit switch is provided on the protection plate.

[0008] Preferably, when the starting column contacts the electrical limit switch, the circuit of the plate shear body is in an open state;

[0009] A human body induction alarm is provided at one end of the protection plate away from the plate shear body.

[0010] Preferably, a special-shaped cavity is provided inside the guard plate. A guard plate width extension component matched with the special-shaped cavity is provided. The special-shaped cavity includes a circular cavity, an arc-shaped cavity, two tooth plate sliding cavities and multiple gear mounting cavities. The circular cavity is located at one end of the guard plate hinged to the body of the shearing machine. The two tooth plate sliding cavities are respectively located at the symmetrical positions in the middle of the guard plate. The two tooth plate sliding cavities and the circular cavity are connected to each other through through holes. The arc-shaped cavity is located on one side of the circular cavity away from the tooth plate sliding cavity. The multiple gear mounting cavities are distributed on one side of the tooth plate sliding cavity close to the edge of the guard plate.

[0011] Preferably, the guard plate width extension component includes a turntable, an arc-shaped plate, two tooth plates and multiple semi-gears. The turntable is hinged to the side wall of the body of the shearing machine through a rotating shaft. The arc-shaped plate is slidably connected inside the arc-shaped cavity and is fixedly connected to the turntable. The tooth plates are slidably connected inside the tooth plate sliding cavities. The two tooth plates and the arc-shaped plate are connected to each other through a connecting belt passing through the through holes. The semi-gears are rotatably connected inside the gear mounting cavities and are meshed with the tooth plates. The side of the semi-gear without teeth is located outside the guard plate, and a width extension rod fixedly connected to it is provided on it.

[0012] Preferably, a sector-shaped folding piece matched with the width extension rod is provided on the width extension rod. One side of the sector-shaped folding piece is fixedly connected to the width extension rod, and the other side is fixedly connected to the guard plate.

[0013] Preferably, an arc-shaped through hole is provided on the guard plate, and a limiting column passing through the arc-shaped through hole is provided on the body of the shearing machine.

[0014] Preferably, the body of the shearing machine is provided with a base, a sprocket assembly and a discharging assembly connected movably. The base is fixedly connected to the lower end of the side wall of the discharging end of the shearing machine body. A sprocket mounting cavity is provided inside it, and two groups of displacement sliding grooves are provided on the cavity wall of the sprocket mounting cavity. The sprocket assembly is movably connected inside the sprocket mounting cavity, and the discharging assembly is fixedly connected to the sprocket assembly.

[0015] Preferably, the sprocket assembly includes two groups of sprocket shafts, multiple sprockets, at least one group of chains and a displacement plate. The sprocket shafts are rotatably connected to both ends inside the sprocket mounting cavity. The multiple sprockets are respectively key-connected to the sprocket shafts. The chains are meshed with the multiple sprockets, and both ends of the chains are respectively fixedly connected to the side walls of both ends of the displacement plate. Multiple sliding shafts fixedly connected to the displacement plate are provided on the two side walls of the displacement plate not connected to the chains, and the ends of the sliding shafts away from the displacement plate are slidably connected inside the sliding grooves.

[0016] Preferably, the unloading component includes a fixed plate, an unloading plate, and a rotating top plate. The bottom wall of the fixed plate is fixedly connected to the displacement plate, and an installation groove matching the rotating top plate is provided on the fixed plate. One end of the rotating top plate close to the displacement plate is hinged in the installation groove, and a vertical plate / rod fixedly connected thereto is provided on the top surface of the rotating top plate close to the displacement plate. A stop block matching the vertical plate / rod is provided on the side wall of the discharge end of the shearing machine body, and one end of the unloading plate far from the displacement plate is hinged on the upper surface of the fixed plate.

[0017] Preferably, the length of the displacement plate is less than 1 / 2 of the length of the fixed plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By using the guard plate and the electrical limiter, the state of the guard plate can directly affect the start of the shearing machine body, ensuring that the shearing machine can only start when the guard plate is in the protective state, avoiding the situation that there are people in the back unloading area during the start-up process of the shearing machine, and completely preventing accidents from occurring.

[0020] 2. By using the guard plate width extension component, the width of the guard plate is large enough when in the protective state, avoiding the situation that non-operators directly step over the guard plate or drill under the guard plate into the back unloading area of the shearing machine. At the same time, when the guard plate is in the non-protective state, the guard plate width extension component is retracted into the guard plate, which can also avoid the situation that the relative width of the guard plate is too large and affects the normal use of the shearing machine.

[0021] 3. Through the settings of the unloading component and the sprocket component, the staff can complete the unloading and collection work of the shearing plate without entering the discharge area of the shearing machine, further reducing the possibility of non-operators being mechanically injured when entering the discharge area of the shearing machine during its operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram for determining the start of a shearing machine in a shearing machine with a protection function;

[0023] Figure 2 It is a schematic diagram of the overall structure of a shearing machine with a protection function;

[0024] Figure 3 For Figure 2 The enlarged structural schematic diagram at A in;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the guard plate in the second embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the guard plate width extension component in the second embodiment of the present invention;

[0027] Figure 6Schematic cross-sectional structure diagram of the fan-shaped folding piece in the second embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the decentralized structure of the sprocket assembly and the unloading assembly in the third embodiment of the present invention.

[0029] In the figure: 1. Shearing machine body; 13. Limit column; 2. Guard plate; 20. Starting column; 21. Human body induction alarm; 23. Arc-shaped through hole; 3. Electrical limiter; 4. Special-shaped cavity; 40. Circular cavity; 41. Arc-shaped cavity; 42. Tooth plate sliding cavity; 43. Gear installation cavity; 44. Through hole; 5. Guard plate width extension component; 50. Turntable; 500. Rotating shaft; 51. Arc-shaped plate; 52. Tooth plate; 53. Half gear; 54. Connecting belt; 55. Width extension rod; 550. Fan-shaped folding piece; 6. Base; 60. Sprocket installation cavity; 61. Sliding groove; 7. Sprocket assembly; 70. Sprocket shaft; 71. Sprocket; 72. Chain; 73. Displacement plate; 730. Sliding shaft; 8. Unloading assembly; 80. Fixed plate; 800. Installation groove; 81. Unloading plate; 82. Rotating top plate; 820. Vertical plate / rod; 821. Stopper. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] Embodiment 1

[0032] Please refer to the attached Figures 1-3 , a shearing machine with a protection function, including:

[0033] Shearing machine body 1, at least one guard plate 2 and an electrical limiter 3. The guard plate 2 is hinged on the side wall of the shearing machine body 1, and the electrical limiter 3 is fixedly connected to the side wall of the shearing machine body 1. It is connected to the electrical control box of the shearing machine body 1 through a circuit, and a starting column 20 for starting the electrical limiter 3 is provided on the guard plate 2.

[0034] Specifically, when the starting column 20 contacts the electrical limiter 3, the circuit of the shearing machine body 1 is in an open state;

[0035] A human body induction alarm 21 is provided at one end of the guard plate 2 away from the shearing machine body 1;

[0036] During actual use, the position of the guard plate 2 directly affects whether the shearing machine can be started normally. When the guard plate 2 is in the vertically upward state, that is, in the non-protective state, the blanking area on the back of the shearing machine is in an open state, and personnel can enter and clean the blanking area. At this time, the starting column 20 on the guard plate 2 contacts the electrical limit switch 3, causing the starting circuit of the shearing machine body 1 to be in an open state. That is to say, the shearing machine cannot work normally in the non-protective state, avoiding the situation that the cleaning personnel in the blanking area are mechanically injured due to the operator's mistake.

[0037] When the guard plate 2 is in the horizontal state, that is, in the protective state, the starting column 20 is disengaged from the electrical limit switch 3. At this time, the shearing machine can be normally started to cut the metal plate. And during this process, due to the presence of the guard plate, the blanking area cannot be normally entered.

[0038] Considering that there may be situations where there are still people cleaning in the blanking area, and due to the operator's mistake, the guard plate is put down without knowing it. Installing a human body induction alarm 21 on the guard plate 2 can timely prevent such situations from occurring. It should be noted that considering that the working space where the shearing machine is located may have a relatively large noise, the human body induction alarm 21 is equipped with a matching alarm light, and the alarm light is installed at a prominent position on the front of the shearing machine.

[0039] Embodiment 2

[0040] Please refer to the appendix Figures 4-6

[0041] Specifically, a special-shaped cavity 4 is provided inside the guard plate 2, and a guard plate width extension component 5 matching the special-shaped cavity is provided. The special-shaped cavity 4 includes a circular cavity 40, an arc cavity 41, two tooth plate sliding cavities 42, and multiple gear mounting cavities 43. The circular cavity 40 is located at one end of the guard plate 2 hinged to the shearing machine body 1. The two tooth plate sliding cavities 42 are respectively located at the middle symmetric positions of the guard plate 42, and the two tooth plate sliding cavities 42 and the circular cavity 40 are connected to each other through a through hole 44. The arc cavity 41 is located on one side of the circular cavity 40 away from the tooth plate sliding cavity 42. The multiple gear mounting cavities 43 are distributed on one side of the tooth plate sliding cavity 42 close to the edge of the guard plate 2.

[0042] Specifically, the guard plate width extension component 5 includes a turntable 50, an arc-shaped plate 51, two toothed plates 52 and multiple half gears 53. The turntable 50 is hinged to the side wall of the shearing machine body 1 through a rotating shaft 500. The arc-shaped plate 51 is slidably connected in the arc-shaped cavity 41 and is fixedly connected to the turntable 50. The toothed plate 52 is slidably connected in the toothed plate sliding cavity 42. The two toothed plates 52 and the arc-shaped plate 51 are interconnected through a connecting belt 54 passing through the through hole 44. The half gear 53 is rotatably connected in the gear installation cavity 43 and is meshed with the toothed plate 52. The side of the half gear 53 without teeth is located outside the guard plate 2, and a width extension rod 55 fixedly connected thereto is provided thereon.

[0043] Considering that in actual applications, some people, in order to save time and effort, directly step over the guard plate 2 or crawl under the guard plate 2 into the blanking area. Considering widening the guard plate 2, but simply widening it will affect the normal use of the shearing machine due to excessive width. On this basis, through the mutual cooperation of the special-shaped cavity inside the guard plate and the guard plate width extension component 5, the width of the guard plate 2 can be automatically widened in the protection state, and at the same time, the guard plate width extension component 5 can automatically retract into the guard plate 2 in the non-protection state. The specific method is as follows:

[0044] When the rotating shaft 500 drives the turntable 50 to rotate, first, the turntable 50 drives the arc-shaped plate 51 fixedly connected thereto to slide in the arc-shaped cavity 41. During this process, the position movement of the arc-shaped plate 51 will drive the sliding of the toothed plate 52 through the connecting belt 54. The sliding of the toothed plate 52 drives the rotation of the half gear 53 meshed with it, and the expansion or contraction of the width extension rod 55 is realized by the rotation of the half gear 53. When the arc-shaped plate 51 slides to the end of the arc-shaped cavity 41 and cannot continue to slide, the width extension rod 55 also completes the expansion or contraction procedure. At this time, when the rotating shaft 500 continues to rotate, it will do work on the guard plate 2 through the arc-shaped plate 51 and drive the guard plate 2 to rotate. That is to say, during the process of the rotating shaft 500 driving the turntable 50 to rotate, the expansion or contraction of the width extension rod 55 is first completed, and then the rotation of the guard plate 2 is completed, achieving the goal that the actual width of the guard plate 2 is larger in the protection state and smaller in the non-protection state, so as to achieve the purpose that the cleaning personnel in the blanking area cannot enter in the protection state and the actual width of the guard plate 2 does not affect the cleaning of the blanking area by the blanking personnel in the non-protection state.

[0045] Specifically, the width extension rod 55 is provided with a matching fan-shaped folding piece 550. One side of the fan-shaped folding piece 550 is fixedly connected to the width extension rod 55, and the other side is fixedly connected to the guard plate 2. Considering that the method of widening the guard plate 2 solely by the width extension rod 55 still has the risk that workers can reach into the blanking area of the shearing machine through the gap between the width extension rods 55 to fish out some uncleaned sheet materials, so a fan-shaped folding piece 550 is paired with the width extension rod 55. When the width extension rod 55 is unfolded, the fan-shaped folding piece 550 is also in an open state, completely eliminating the possibility of workers' illegal operations.

[0046] Specifically, the guard plate 2 is provided with an arc-shaped through hole 23, and the shearing machine body 1 is provided with a limit column 13 passing through the arc-shaped through hole 23. The arc-shaped through hole 23 provided on the guard plate 2 and the limit column 13 provided on the shearing machine body 1 can limit the rotation of the guard plate 2 and avoid the situation where its rotation amplitude is too large. For example, the unconnected end of the guard plate 2 and the shearing machine body 1 may hit the ground or rotate to the front operation table area of the shearing machine due to excessive rotation amplitude.

[0047] It should be noted that a small motor for driving the rotation of the rotating shaft 500 is provided inside the shearing machine body 1. Considering that in the case of manually operating the rotating shaft 500, there may be a situation where workers find it time-consuming and laborious and perform illegal operations. The state of the guard plate 2 is switched by directly driving the rotating shaft 500 through the small motor.

[0048] It should be noted that in the present invention, the blanking area on the back of the shearing machine is close to the factory building wall, so two guard plates 2 can complete the protection. In actual application, there may be a situation where the shearing machine is not adjacent to the wall. In this case, if only two guard plates 2 are used, it is obviously not sufficient to achieve the protection purpose. In this case, an auxiliary guard plate connecting the two guard plates 2 can be considered at the unconnected end of the two guard plates 2 and the shearing machine body 1. The two guard plates 2 and the auxiliary guard plate are in a U shape, and together with the shearing machine body, they form a relatively closed blanking area, so as to achieve the purpose of preventing workers from performing illegal operations.

[0049] Embodiment 3

[0050] Please refer to the appendix Figure 7

[0051] Specifically, the shearing machine body 1 is provided with a base 6, a sprocket assembly 7 and a discharging assembly 8 which are movably connected. The base 6 is fixedly connected to the lower end of the side wall of the discharging end of the shearing machine body 1, and a sprocket installation cavity 60 is provided inside it. Two groups of sliding grooves 61 are provided on the cavity wall of the sprocket installation cavity 60. The sprocket assembly 7 is movably connected inside the sprocket installation cavity 60, and the discharging assembly 8 is fixedly connected to the sprocket assembly 7.

[0052] The setting of the guard plate structure will indeed reduce the overall efficiency of the staff to a certain extent. Considering that in actual applications, there may be situations where workers violate regulations and modify the equipment in order to speed up the project progress (for example, by short-circuiting the electrical limiter 3, so that the shearing machine body 1 can operate normally regardless of the position of the guard plate 2). To further reduce the occurrence of such situations, on the basis of the original guard plate structure, through the combined use of the sprocket assembly 7 and the unloading assembly 8, it is possible to complete the rapid unloading operation of the discharge area of the shearing machine body 1 without workers entering the area, improving the safety performance and, in effect, improving the overall work efficiency of the staff, and fundamentally reducing the possibility of the staff being mechanically injured.

[0053] Specifically, the sprocket assembly 7 includes two groups of sprocket shafts 70, multiple sprockets 71, at least one group of chains 72, and a displacement plate 73. The sprocket shafts 70 are rotatably connected to both ends inside the sprocket installation cavity 60. Multiple sprockets 71 are respectively key-connected to the sprocket shafts 70. The chains 72 are meshed and connected to the multiple sprockets 71, and both ends of the chains 72 are respectively fixedly connected to the side walls at both ends of the displacement plate 73. On the two side walls of the displacement plate 73 that are not connected to the chains 72, there are multiple sliding shafts 730 fixedly connected to the displacement plate 73, and one end of the sliding shafts 730 away from the displacement plate 73 is slidably connected to the sliding groove 61;

[0054] The rotation of the sprocket shafts 70 drives the rotation of the sprockets 71, and indirectly drives the movement of the displacement plate 73 through the chains 72. At the same time, in order to ensure that the displacement plate 73 does not get off the track due to external forces during the movement along with the chains 72, by providing a sliding groove 61 on the cavity wall of the sprocket installation cavity 60 and arranging sliding shafts 730 on the displacement plate 73, the relative position of the displacement plate 73 is restricted. It should be noted that the sprocket shafts 70 are equipped with corresponding drive motors. Considering that there are many types and installation positions of drive motors and the technology is mature, no excessive restrictions are made.

[0055] Specifically, the unloading assembly 8 includes a fixed plate 80, an unloading plate 81, and a rotating top plate 82. The bottom wall of the fixed plate 80 is fixedly connected to the displacement plate 73, and the fixed plate 80 is provided with an installation groove 800 that matches the rotating top plate 82. One end of the rotating top plate 82 close to the displacement plate 73 is hinged in the installation groove 800, and on the top surface of one end of the rotating top plate 82 close to the displacement plate 73, there is a vertical plate / rod 820 fixedly connected to it. On the side wall of the discharge end of the shearing machine body 1, there is a stop block 821 that matches the vertical plate / rod 820. One end of the unloading plate 81 away from the displacement plate 73 is hinged on the upper surface of the fixed plate 80;

[0056] When the displacement plate 73 is in the initial position, the unloading assembly 8 is flat as a whole, that is, the unloading plate 81 is in a horizontal state. When the displacement plate 73 moves, the fixed plate 80 moves accordingly. During the movement, when the longitudinal / rod 820 on the rotating top plate 82 moves to contact with the stop block 821, under the resistance generated by the stop block 821, the rotating top plate 82 rotates along the position where it is hinged to the fixed plate 80. After the rotating top plate 82 rotates, it will drive the unloading plate 81 to rotate, so that the unloading plate 81 is in an inclined state, completing the unloading work of the shear plate, and at this time, the hinged part of the unloading plate 81 and the fixed plate 80 is already outside the discharge area of the shearing machine body 1. This method greatly reduces the possibility of mechanical injury to the operator.

[0057] Specifically, the length of the displacement plate 73 is less than 1 / 2 of the length of the fixed plate 80; the difference in length between the displacement plate 73 and the fixed plate 80 is the length of the discharge plate 81 outside the discharge area of the shearing machine body 1 when unloading.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A shearing machine with protective function, characterized in that: include: A shearing machine body (1), at least one guard plate (2) and an electrical limiter (3), wherein the guard plate (2) is hinged to the side wall of the shearing machine body (1), the electrical limiter (3) is fixedly connected to the side wall of the shearing machine body (1), and is connected to the electrical control box of the shearing machine body (1) through an electrical circuit, and a starting column (20) for starting the electrical limiter (3) is provided on the guard plate (2); When the starting column (20) contacts the electrical limiter (3), the circuit of the shearing machine body (1) is in an off state; A human body sensing alarm (21) is provided on one end of the guard plate (2) away from the shearing machine body (1); The guard plate (2) is provided with a special-shaped cavity (4), and the special-shaped cavity is provided with a guard plate width extension component (5) matched therewith. The special-shaped cavity (4) includes a circular cavity (40), an arc-shaped cavity (41), two tooth plate sliding cavities (42) and a plurality of gear mounting cavities (43). The circular cavity (40) is located at one end where the guard plate (2) and the shearing machine body (1) are hinged. The two tooth plate sliding cavities (42) are respectively located at symmetrical positions in the middle of the guard plate (42). The two tooth plate sliding cavities (42) and the circular cavity (40) are connected to each other through a through hole (44). The arc-shaped cavity (41) is located on the side of the circular cavity (40) away from the tooth plate sliding cavity (42). The plurality of gear mounting cavities (43) are distributed on the side of the tooth plate sliding cavity (42) close to the edge of the guard plate (2). The guard plate width extension assembly (5) includes a turntable (50), an arc plate (51), two tooth plates (52) and a plurality of half gears (53), the turntable (50) is hinged to the side wall of the shearing machine body (1) through a rotating shaft (500), the arc plate (51) is slidably connected in the arc cavity (41), and is fixedly connected to the turntable (50), the tooth plate (52) is slidably connected in the tooth plate sliding cavity (42), the two tooth plates (52) and the arc plate (51) are connected to each other through the through hole (44) via a connecting belt (54), the half gear (53) is rotatably connected in the gear mounting cavity (43), and is meshed with the tooth plate (52), and the side of the half gear (53) without teeth is located outside the guard plate (2), and a width extension rod (55) fixedly connected thereto is provided on the half gear; When the rotating shaft (500) drives the rotating disk (50) to rotate, the rotating disk (50) first drives the arc plate (51) fixedly connected thereto to slide in the arc cavity (41). During this process, the position movement of the arc plate (51) drives the tooth plate (52) to slide through the connecting belt (54), and the sliding of the tooth plate (52) drives the half gear (53) meshed with it to rotate, and the width extension rod (55) is expanded or contracted by the rotation of the half gear (53). When the arc plate (51) slides to one end of the arc cavity (41) and cannot continue to slide, the width extension rod (55) also completes the expansion or contraction process. At this time, if the rotating shaft (500) continues to rotate, it will work on the guard plate (2) through the arc plate (51) and drive the guard plate (2) to rotate.

2. A shearing machine with a protective function according to claim 1, characterized in that: The width extension rod (55) is provided with a fan-shaped folding piece (550) matched therewith, and one side of the fan-shaped folding piece (550) is fixedly connected to the width extension rod (55), and the other side is fixedly connected to the guard plate (2).

3. The shearing machine with protective function according to claim 1, characterized in that: An arc-shaped through hole (23) is provided on the guard plate (2), and a limiting column (13) passing through the arc-shaped through hole (23) is provided on the shearing machine body (1).

4. The shearing machine with protective function according to claim 1, characterized in that: The shearing machine body (1) is provided with a movably connected base (6), a sprocket assembly (7) and a discharge assembly (8); the base (6) is fixedly connected to the lower end of the side wall of the discharge end of the shearing machine body (1), and a sprocket mounting cavity (60) is provided therein, and two groups of sliding grooves (61) are provided on the cavity wall of the sprocket mounting cavity (60); the sprocket assembly (7) is movably connected in the sprocket mounting cavity (60), and the discharge assembly (8) is fixedly connected to the sprocket assembly (7).

5. A shearing machine with a protective function according to claim 4, characterized in that: The sprocket assembly (7) comprises two groups of sprocket shafts (70), a plurality of sprockets (71), at least one group of chains (72) and a displacement plate (73), wherein the sprocket shaft (70) is rotatably connected to the two ends of the inner side of the sprocket mounting cavity (60), the plurality of sprockets (71) are respectively key-connected to the sprocket shaft (70), the chain (72) is meshedly connected to the plurality of sprockets (71), and the two ends of the chain (72) are respectively fixedly connected to the side walls of the displacement plate (73), and a plurality of sliding shafts (730) fixedly connected to the displacement plate (73) are provided on the side walls of the displacement plate (73) on both sides not connected to the chain (72), and the sliding shafts (730) are slidably connected to the sliding groove (61) at one end away from the displacement plate (73).

6. The shearing machine with protective function according to claim 5, characterized in that: The unloading assembly (8) includes a fixed plate (80), a unloading plate (81) and a rotating top plate (82), the bottom wall of the fixed plate (80) is fixedly connected to the displacement plate (73), and the fixed plate (80) is provided with a mounting groove (800) matching the rotating top plate (82), the rotating top plate (82) is hinged in the mounting groove (800) at one end close to the displacement plate (73), and a longitudinal plate / rod (820) fixedly connected to the rotating top plate (82) is provided on the top surface of the end close to the displacement plate (73), a stopper (821) matching the longitudinal plate / rod (820) is provided on the side wall of the discharge end of the shearing machine body (1), and the unloading plate (81) is hinged to the upper surface of the fixed plate (80) at one end away from the displacement plate (73).

7. A shearing machine with a protective function according to claim 6, characterized in that: The length of the displacement plate (73) is less than 1 / 2 of the length of the fixed plate (80).

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