Iron sheet scissors with shearing tool convenient to replace

Abstract

The utility model discloses a pair of iron shears convenient for replacing shearing tools, which comprises two handles which are rotatably connected through an I-shaped shaft. According to the iron sheet scissors with the shearing tool convenient to replace, the two Z-shaped handles are extruded towards the middle, and then the corresponding T-shaped inserting blocks can be driven to move towards the middle of the supporting shell, so that the T-shaped inserting blocks leave the corresponding L-shaped limiting plates, rotation limitation on the rotating shaft can be relieved, the corresponding L-shaped protection plates or straight and flat protection plates are rotated, and the shearing tool can be replaced conveniently. After an L-shaped protection plate and a straight and flat protection plate are unfolded, a protection barrier for the hand of an operator is formed, a Z-shaped handle is loosened, a T-shaped insertion block is inserted into a corresponding L-shaped limiting plate under the pushing of the elastic force of a corresponding second spring, the unfolded L-shaped protection plate and the straight and flat protection plate are limited, and the stability of protection for the hand of the operator is improved; and the situation that a worker is scratched by the tilted iron sheet when the iron sheet is sheared is reduced, and the use safety of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal shears, and in particular to a sheet metal shears with easily replaceable cutting tools. Background Technology

[0002] Scissors are a common and frequently used tool in mechanical tools. Scissors are divided into several types according to their uses. One type is household scissors, which have low cutting hardness and can only be used to cut some soft materials such as paper and hemp rope. Another type is industrial scissors, which are mostly British, French, and German tin scissors with high cutting hardness and are mostly used to cut sheet metal, aluminum, etc.

[0003] For example, Chinese utility model patent (CN 213379570 U) discloses a British-style carbon steel sheet cutter specifically for cold-rolled steel sheets. It states: "This utility model allows people to flexibly adjust the length of the handle according to the different specifications of the sheet metal being cut, making cutting more labor-saving and simple to operate. Damaged blades can also be disassembled and replaced, reducing waste." It also states: "However, in actual use, existing sheet cutters are less effective because different cold-rolled steel sheets have different specifications, thicknesses, and hardnesses. The same sheet cutter is more laborious when cutting cold-rolled steel sheets with greater thickness and hardness. Existing sheet cutters cannot be flexibly adjusted according to the specifications of the cold-rolled steel sheet being cut, which is not conducive to daily use."

[0004] In summary, it is known that the existing technology uses blades to cut sheet metal. However, this method has the following technical problems: when the sheet metal shears are cutting the sheet metal, the sheet metal is prone to lifting up, and the lifted sheet metal can easily scratch the workers. The above-mentioned devices lack protection for the operator's hands when cutting sheet metal. Therefore, this application proposes a sheet metal shear that is easy to replace the cutting tool, and provides a new technical solution to solve the technical problems mentioned in the above patent. Utility Model Content

[0005] Based on this, it is necessary to address the aforementioned technical problems by providing a sheet metal shear that facilitates tool replacement. By squeezing the two Z-shaped handles in the middle, the corresponding T-shaped inserts move towards the center of the support shell, allowing the T-shaped inserts to move away from the corresponding L-shaped limiting plates, thus releasing the rotation restriction on the rotating shaft. Subsequently, the corresponding L-shaped protective plate or straight protective plate can be rotated. When both the L-shaped and straight protective plates are unfolded, they form a protective barrier for the operator's hands. When the Z-shaped handles are released, the T-shaped inserts are pushed by the elastic force of the corresponding second spring, causing them to insert into the corresponding L-shaped limiting plates, further restricting the unfolded L-shaped and straight protective plates. This improves the stability of hand protection for the operator, reduces the risk of injury from protruding sheet metal during shearing, and enhances the safety of the device. Furthermore, when the device is not in use, the L-shaped and straight protective plates can be folded up to a contacting state, providing some protection for the shear blade. This reduces the risk of the shear blade injuring the operator when the device is in a tool bag and the operator is fumbling for it, further improving the device's safety.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A sheet metal cutter with easily interchangeable cutting tools, used for cutting sheet metal.

[0008] The tin shears that facilitate the replacement of cutting tools specifically include:

[0009] Two handles are rotatably connected by an I-shaped shaft. A first spring is fixedly connected between the two handles. A limiting hook plate is rotatably connected to the outer wall of one of the handles, and a T-shaped post adapted to the limiting hook plate is fixedly connected to the outer wall of the other handle. A protective mechanism is provided on the I-shaped shaft, and a scissor clamp assembly is provided on both handles.

[0010] The protection mechanism includes a support shell, a rotating shaft, a protection component, a pulling component, and a limiting component. The two sides of the I-shaped shaft are respectively fixedly connected to the support shells, and the inner walls of the two support shells are rotatably connected to the rotating shafts. The two support shells are each provided with a pulling component, and the two rotating shafts are each provided with a limiting component.

[0011] As a preferred embodiment of the sheet metal shears that facilitate the replacement of cutting tools provided by this utility model, the protective component includes an L-shaped protective plate, wherein the outer wall of one of the rotating shafts is fixedly connected to an L-shaped protective plate, and the outer wall of the other rotating shaft is fixedly connected to a straight flat protective plate that is adapted to the L-shaped protective plate.

[0012] As a preferred embodiment of the sheet metal shears for easy tool replacement provided by this utility model, the pulling assembly includes T-shaped inserts. Two T-shaped inserts are slidably connected to the inner wall of the support shell. A second spring is fixedly connected to one side of each of the two T-shaped inserts that is close to each other. The ends of the two second springs that are close to each other are fixedly connected to the inner wall of the support shell. Z-shaped handles are fixedly connected to the outer walls of each of the two T-shaped inserts. The two Z-shaped handles are slidably connected to the inner wall of the support shell.

[0013] As a preferred embodiment of the sheet metal shears that facilitate the replacement of cutting tools provided by this utility model, the limiting component includes an L-shaped limiting plate, and the outer wall of the rotating shaft is fixedly connected with an L-shaped limiting plate near both ends, and the T-shaped insert is movably inserted into the L-shaped limiting plate.

[0014] As a preferred embodiment of the sheet metal shears that facilitate the replacement of cutting tools provided by this utility model, the shear clamp assembly includes clamping blocks, and the two ends of the handles away from the I-shaped shaft are fixedly connected to the clamping blocks.

[0015] As a preferred embodiment of the sheet metal shears that facilitate the replacement of cutting tools provided by this utility model, the shear clamp assembly further includes two cutting blades, each of which has a mounting block fixedly connected to its outer wall. The mounting block is movably inserted into the handle, and the inner wall of the handle is threadedly connected to a threaded rod, which is movably inserted into the mounting block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model provides a sheet metal shear that facilitates tool replacement. By pressing the two Z-shaped handles in the middle, the corresponding T-shaped inserts move towards the center of the support shell, allowing the T-shaped inserts to move away from the corresponding L-shaped limiting plates, thus releasing the rotation restriction on the rotating shaft. Subsequently, the corresponding L-shaped protective plate or straight protective plate can be rotated. After both the L-shaped and straight protective plates are unfolded, they form a protective barrier for the operator's hands. When the Z-shaped handles are released, the T-shaped inserts are pushed by the elastic force of the corresponding second spring, causing them to insert into the corresponding L-shaped limiting plates, further restricting the unfolded L-shaped and straight protective plates. This improves the stability of hand protection and reduces the risk of injury from protruding sheet metal during shearing, enhancing the safety of the device. Furthermore, when the device is not in use, the L-shaped and straight protective plates can be folded up to a contacting state, providing some protection for the shear blade. This reduces the risk of the shear blade injuring the operator when the device is in a tool bag and the operator is fumbling for it, further improving the device's safety.

[0018] This utility model provides a sheet metal shear that facilitates the replacement of cutting tools. The threaded rod allows the shearing blade and mounting block to be mounted on or removed from the handle, making it convenient for the operator to replace damaged shearing blades promptly. This reduces situations where the entire device becomes unusable due to blade damage. Two clamping blocks assist the operator in gripping or bending sheet metal. The design of the limiting hook plate and T-shaped post restricts unused parts of the device, preventing the two handles from extending excessively. This keeps the two shearing blades outside the retracted L-shaped and straight protective plates, improving the stability of the device. Attached Figure Description

[0019] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of the sheet metal shears provided by this utility model, which facilitates the replacement of cutting tools;

[0021] Figure 2 Another overall structural diagram of the sheet metal shears provided by this utility model for easy replacement of cutting tools;

[0022] Figure 3 An exploded view of part of the structure of the sheet metal shears provided by this utility model, which facilitates the replacement of cutting tools;

[0023] Figure 4 An exploded view of the overall structure of the sheet metal shears for easy tool replacement provided by this utility model;

[0024] Figure 5 A schematic diagram of the internal structure of the support shell of the sheet metal shears for easy replacement of cutting tools provided by this utility model;

[0025] Figure 6 This utility model provides a tin shears with easily replaceable cutting tools. Figure 5 A magnified view of A in the middle.

[0026] The markings in the diagram are explained as follows:

[0027] 1. Handle; 2. I-shaped shaft; 3. First spring; 4. Restricting hook plate; 5. T-shaped post; 6. Protective mechanism; 7. Shearing blade; 8. Mounting block; 9. Threaded rod; 10. Support shell; 11. Rotating shaft; 12. L-shaped protective plate; 13. Straight protective plate; 14. L-shaped restricting plate; 15. T-shaped insert; 16. Z-shaped handle; 17. Second spring; 18. Clamping block. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] As described in the background art, when sheet metal shears cut sheet metal, the sheet metal is prone to lifting up, and the lifted sheet metal can easily scratch the workers. The aforementioned device lacks protection for the operator's hands when cutting sheet metal.

[0030] To solve this technical problem, this utility model provides a sheet metal cutter with easily replaceable cutting tools, which is used for cutting sheet metal.

[0031] For details, please refer to Figures 1-5 Tin shears that facilitate tool replacement include:

[0032] Two handles 1 are rotatably connected by an I-shaped shaft 2. A first spring 3 is fixedly connected between the two handles 1. A limiting hook plate 4 is rotatably connected to the outer wall of one handle 1. A T-shaped column 5 adapted to the limiting hook plate 4 is fixedly connected to the outer wall of the other handle 1. A protective mechanism 6 is provided on the I-shaped shaft 2. A scissor clamp assembly is provided on both handles 1.

[0033] The protection mechanism 6 includes a support shell 10, a rotating shaft 11, a protection component, a pulling component, and a limiting component. The support shell 10 is fixedly connected to both sides of the I-shaped shaft 2. The rotating shaft 11 is rotatably connected to the inner walls of both support shells 10. A pulling component is provided on both support shells 10, and a limiting component is provided on both rotating shafts 11.

[0034] The sheet metal shears provided by this utility model, which facilitate the replacement of cutting tools, allow for the movement of the T-shaped inserts 15 towards the center of the support shell 10 by pressing the two Z-shaped handles 16 inwards. This causes the T-shaped inserts 15 to move away from the corresponding L-shaped limiting plate 14, thus releasing the rotation restriction on the rotating shaft 11. Subsequently, the corresponding L-shaped protective plate 12 or straight protective plate 13 can be rotated. After both the L-shaped protective plate 12 and the straight protective plate 13 are unfolded, a protective barrier for the operator's hands can be formed. When the Z-shaped handles 16 are released, the T-shaped inserts 15 are pushed by the elastic force of the corresponding second spring 17. The L-shaped limiting plate 14 is inserted to restrict the unfolded L-shaped protective plate 12 and the straight protective plate 13, which improves the stability of the operator's hand protection, reduces the possibility of the sticking-out sheet metal scratching the operator when shearing sheet metal, and improves the safety of the device. When the device is not in use, the L-shaped protective plate 12 and the straight protective plate 13 can be folded up to a state of mutual contact, which can provide some protection for the shearing blade 7. This reduces the possibility of the shearing blade 7 scratching the operator when the device is placed in the tool bag and the operator is groping for the device in the tool bag, thus improving the safety of the device.

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Example 1

[0036] Please refer to Figures 1-6 A type of sheet metal shears with easily replaceable cutting tools, comprising:

[0037] Two handles 1 are rotatably connected by an I-shaped shaft 2. A first spring 3 is fixedly connected between the two handles 1. A limiting hook plate 4 is rotatably connected to the outer wall of one handle 1. A T-shaped post 5 adapted to the limiting hook plate 4 is fixedly connected to the outer wall of the other handle 1. A protective mechanism 6 is provided on the I-shaped shaft 2. A scissor clamp assembly is provided on both handles 1. A rubber sleeve can be provided at the position where the operator grips the handle 1.

[0038] The protection mechanism 6 includes a support shell 10, a rotating shaft 11, a protection component, a pulling component, and a limiting component. The support shells 10 are fixedly connected to both sides of the I-shaped shaft 2. The rotating shafts 11 are rotatably connected to the inner walls of both support shells 10. Pulling components are provided on both support shells 10, and limiting components are provided on both rotating shafts 11. The protection mechanism 6 can protect the operator's hands when using the device, and can also shield the sharp parts of the device when the device is idle.

[0039] The protective assembly includes an L-shaped protective plate 12. The outer wall of one rotating shaft 11 is fixedly connected to the L-shaped protective plate 12, and the outer wall of the other rotating shaft 11 is fixedly connected to a straight flat protective plate 13 that is adapted to the L-shaped protective plate 12. The protective assembly can protect part of the operator's hands when the device is in use and protect the shearing blade 7 when it is not in use.

[0040] The pulling assembly includes T-shaped inserts 15. Two T-shaped inserts 15 are slidably connected to the inner wall of the support shell 10. A second spring 17 is fixedly connected to the side of the two T-shaped inserts 15 that is close to each other. The ends of the two second springs 17 that are close to each other are fixedly connected to the inner wall of the support shell 10. A Z-shaped handle 16 is fixedly connected to the outer wall of the two T-shaped inserts 15. The two Z-shaped handles 16 are slidably connected to the inner wall of the support shell 10. The pulling assembly can cooperate with the limiting assembly to limit the rotation of the rotating shaft 11, thereby limiting the rotation state of the L-shaped protective plate 12 or the straight flat protective plate 13.

[0041] The limiting component includes an L-shaped limiting plate 14. The outer wall of the rotating shaft 11 is fixedly connected to the L-shaped limiting plate 14 near both ends. The T-shaped plug 15 is movably inserted into the L-shaped limiting plate 14. The L-shaped limiting plate 14 has two holes that are adapted to the T-shaped plug 15. When the T-shaped plug 15 is inserted into the two holes, the corresponding L-shaped protective plate 12 or straight protective plate 13 covers the shearing blade 7 or blocks the operator's hand.

[0042] With the above structural design, when the operator needs to use the device, firstly, squeeze the two Z-shaped handles 16 towards the center, which will drive the corresponding T-shaped inserts 15 to move towards the center of the support shell 10. During this process, the two corresponding second springs 17 deform accordingly, causing the T-shaped inserts 15 to move away from the corresponding L-shaped limiting plate 14, thus releasing the rotation restriction on the rotating shaft 11. Then, rotate the corresponding L-shaped protective plate 12 or the straight protective plate 13. After both the L-shaped protective plate 12 and the straight protective plate 13 are unfolded, a protective barrier for the operator's hands can be formed. When the Z-shaped handles 16 are released, the T-shaped inserts 15 are pushed into the corresponding L-shaped limiting plate by the elastic force of the corresponding second springs 17. Plate 14 restricts the unfolded L-shaped protective plate 12 and straight protective plate 13. Then, the operator can rotate the restricting hook plate 4 to make the restricting hook plate 4 leave the T-shaped column 5. Then, the operator can hold the two handles 1, place the sheet metal between the two shearing blades 7, and tighten the handles 1 to make the two handles 1 move relative to each other, which will deform the first spring 3 and then shearing can be performed. When the device is finished, the operator squeezes the two Z-shaped handles 16 in the middle to make the T-shaped insert 15 leave the corresponding L-shaped restricting plate 14. Then, rotate the L-shaped protective plate 12 or the straight protective plate 13 so that the L-shaped protective plate 12 and the straight protective plate 13 are partially attached to each other, forming a partial cover for the two shearing blades 7. Example 2

[0043] The sheet metal shears provided in Example 1, which facilitate the replacement of cutting tools, are further optimized, specifically, as follows: Figures 2-4 As shown, the shearing and clamping assembly includes clamping blocks 18. The two handles 1 are fixedly connected to the end away from the I-shaped shaft 2 with clamping blocks 18. The two clamping blocks 18 can clamp and bend the sheet metal.

[0044] The shear clamp assembly also includes two shear blades 7. The outer walls of the two shear blades 7 are fixedly connected to mounting blocks 8. The mounting blocks 8 are movably inserted into the handle 1. The inner wall of the handle 1 is threadedly connected to a threaded rod 9, which is movably inserted into the mounting block 8. By replacing the shear blades 7, the damaged shear blades 7 can be replaced and a good shear blade 7 can be installed.

[0045] With the above structural design, when replacing the shearing blade 7, rotate the threaded rod 9 so that the threaded rod 9 leaves the corresponding mounting block 8, then pull the shearing blade 7 to drive the mounting block 8 away from the handle 1, then insert the mounting block 8 on the new shearing blade 7 into the handle 1, and rotate the threaded rod 9 in the opposite direction so that the threaded rod 9 is inserted into the mounting block 8 to the appropriate position.

Claims

1. A type of sheet metal shears with easily replaceable cutting tools, comprising two handles (1), characterized in that: The two handles (1) are rotatably connected by an I-shaped shaft (2), and a first spring (3) is fixedly connected between the two handles (1). A limiting hook plate (4) is rotatably connected to the outer wall of one of the handles (1), and a T-shaped post (5) adapted to the limiting hook plate (4) is fixedly connected to the outer wall of the other handle (1). A protective mechanism (6) is provided on the I-shaped shaft (2), and a scissor clamp assembly is provided on both handles (1). The protection mechanism (6) includes a support shell (10), a rotating shaft (11), a protection component, a pulling component, and a limiting component. The two sides of the I-shaped shaft (2) are respectively fixedly connected to the support shell (10). The inner walls of the two support shells (10) are rotatably connected to the rotating shaft (11). The two support shells (10) are each provided with a pulling component, and the two rotating shafts (11) are each provided with a limiting component.

2. The sheet metal shears with easily replaceable cutting tools according to claim 1, characterized in that, The protective assembly includes an L-shaped protective plate (12), with the L-shaped protective plate (12) fixedly connected to the outer wall of one of the rotating shafts (11), and a straight protective plate (13) adapted to the L-shaped protective plate (12) fixedly connected to the outer wall of the other rotating shaft (11).

3. The tin snips of claim 1, wherein, The pulling assembly includes a T-shaped insert (15). Two T-shaped inserts (15) are slidably connected to the inner wall of the support shell (10). A second spring (17) is fixedly connected to the side of the two T-shaped inserts (15) that is close to each other. The ends of the two second springs (17) that are close to each other are fixedly connected to the inner wall of the support shell (10). Z-shaped handles (16) are fixedly connected to the outer wall of the two T-shaped inserts (15). The two Z-shaped handles (16) are slidably connected to the inner wall of the support shell (10).

4. The tin snips of claim 3, wherein, The limiting component includes an L-shaped limiting plate (14), and the outer wall of the rotating shaft (11) is fixedly connected with an L-shaped limiting plate (14) near both ends. The T-shaped insert (15) is movably inserted into the L-shaped limiting plate (14).

5. The tin snips of claim 1, wherein, The shearing assembly includes a clamping block (18), and the two handles (1) are fixedly connected to the clamping block (18) at the ends away from the I-shaped shaft (2).

6. The tin snips of claim 1, wherein, The shear clamp assembly also includes two shear blades (7), and the outer walls of the two shear blades (7) are fixedly connected to mounting blocks (8). The mounting blocks (8) are movably inserted into the handle (1). The inner wall of the handle (1) is threadedly connected to a threaded rod (9), and the threaded rod (9) is movably inserted into the mounting block (8).

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