An electric cutting knife with anti-winding

Abstract

The application discloses an electric cutting knife capable of preventing thread winding, which comprises a frame, a driving motor installed on one side of the frame, an installation hole formed on the other side of the frame, a blade assembly part of the driving motor located in the installation hole and provided with a rotating shaft penetrating through the frame, a gap between the blade assembly part and the installation hole, and a thread winding prevention ring installed in the gap. The thread winding prevention ring fills the gap, avoids the thread from entering the gap when the disc-shaped blade rotates, and ensures the normal rotation of the disc-shaped blade. The clamping head on the thread winding prevention ring is fixed in the positioning hole through the elastic force after compression, so that the thread winding prevention ring is fixed in the position opposite to the installation hole and the blade assembly part and is relatively concentric, thereby reducing the gap and avoiding the thread from entering the gap during the rotation of the blade, and prolonging the service life of the cutting knife.

Description

Technical Field

[0001] This invention relates to electric cutting shears, and more particularly to an electric cutting shears for preventing thread tangling. Background Technology

[0002] Electric cutting shears are a common fabric cutting tool used in the garment industry. Currently, electric cutting shears on the market typically consist of a motor and a frame. To achieve a compact structure, the disc cutter is directly mounted on the motor's drive shaft via a blade assembly. The motor's rotation drives the disc cutter to cut the fabric. This type of electric cutting shear has the following drawbacks: Due to inherent errors in the production and assembly of various components, and because the motor needs to drive the disc cutter through the blade assembly, the mounting holes on the frame are often much larger than the outer diameter of the blade assembly. Furthermore, during operation, the electric cutting shears frequently come into contact with or generate fine threads. These threads can easily enter and become entangled in the gap between the rotating blade assembly and the mounting holes, increasing the load on the cutting shears, hindering the rotation of the disc cutter, and making the shears more prone to damage. Summary of the Invention

[0003] The present invention aims to solve the problems existing in the prior art by providing an electric cutter that prevents wire tangling. By setting an anti-tangling coil in the gap, the thin wire is prevented from being brought into the cutter when the disc cutter rotates, thereby ensuring the normal rotation of the disc cutter and extending the service life of the cutter.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: This anti-thread tangling electric cutting shear includes a frame, a drive motor is installed on one side of the frame, and a mounting hole is opened on the other side of the frame. The rotating shaft of the drive motor passes through the frame and is provided with a blade assembly part located in the mounting hole. An assembly gap is provided between the blade assembly part and the mounting hole. A blade is fixedly connected to the side of the blade assembly part away from the frame. An anti-tangling coil is placed in the assembly gap. The anti-tangling coil fills the assembly gap and is connected to the frame. By setting the anti-tangling coil in the assembly gap, the anti-tangling coil fills the assembly gap, preventing the fine thread from being brought into the gap when the disc cutter rotates, thereby ensuring the normal rotation of the disc cutter.

[0005] To further improve the design, a positioning hole is provided on the frame outside the mounting hole. A connecting groove for connecting the mounting hole is provided on the side of the positioning hole near the mounting hole. A clamping head is provided inside the positioning hole to squeeze and clamp the positioning hole. A connecting part that connects to the anti-winding coil is fixedly connected to one side of the clamping head in the connecting groove. By clamping the clamping head in the positioning hole, the position of the anti-winding coil connected to the extrusion head through the connecting part is relatively fixed.

[0006] Further improvements include a ring-shaped chuck with a cut inside to facilitate inward compression. Several protrusions around the chuck contact the positioning holes. The ring-shaped chuck is clamped into the positioning holes by pressure from the protrusions, ensuring that the anti-winding coil fixed by the chuck is concentrically positioned relative to the mounting hole and the blade assembly, reducing contact between the blade assembly and the anti-winding coil during rotation.

[0007] Further improvements include setting the anti-winding coil lower than the blade assembly on the side furthest from the drive motor, ensuring that the anti-winding coil does not come into contact with the rotating blade after installation, thus preventing damage to the anti-winding coil and guaranteeing the normal anti-winding function of the device.

[0008] Further improvements include connecting the anti-winding coil and the clamp head via a single connecting part. This prevents the clamp head from transferring stress to the anti-winding coil through multiple connecting parts after compression and shrinkage. This would prevent the anti-winding coil from deforming under multiple stresses, thus compromising the concentricity of the anti-winding coil with the mounting hole and the blade assembly. Consequently, the anti-winding coil would be in continuous contact with the rotating blade assembly during use, causing frictional damage and a decrease in the anti-winding effect. This would also increase the load on the drive motor.

[0009] Further improvements include an anti-winding coil with an inner diameter larger than the outer diameter of the blade assembly. The anti-winding coil and the blade assembly are fitted with a clearance to avoid mutual friction. Since the blade assembly needs to rotate simultaneously with the blade, the inner diameter of the anti-winding coil is set to be larger than the outer diameter of the blade assembly. This eliminates the dimensional error caused by the outer diameter of the blade assembly during production and ensures that the blade assembly will not come into contact with the anti-winding coil when rotating.

[0010] To further improve the design, the outer diameter of the anti-winding coil is smaller than the diameter of the mounting hole. A gap is left between the anti-winding coil and the mounting hole to prevent the mounting hole from squeezing and deforming the anti-winding coil. When the thin thread is wound, it will only wrap between two objects that are rotating relative to each other, while the anti-winding coil is stationary relative to the mounting hole. Therefore, the gap between the outer diameter of the anti-winding coil and the mounting hole can be set relatively large, and the outer diameter of the anti-winding coil can be relatively small to avoid the mounting hole with poor dimensional accuracy squeezing the anti-winding coil, which would cause deformation of the anti-winding coil and result in continuous friction between the unwinding coil and the blade assembly, thereby damaging the anti-winding coil and greatly reducing the anti-winding effect.

[0011] Further improvements include a boss on the side of the blade assembly away from the frame, a fixing hole located outside the boss at the center of the inner side of the blade, a fixing cover for pressing the blade threaded to the end of the boss, a number of countersunk screw holes on the fixing cover, a channel hole corresponding to the countersunk screw holes on the blade, a threaded hole corresponding to the channel hole on the blade assembly, and a fixing screw threaded through the channel hole and threaded into the threaded hole in the countersunk screw hole.

[0012] Further improvements include a frame consisting of a motor mounting base at the top for mounting the drive motor and a support base at the bottom. The motor mounting base has a groove on the side away from the drive motor, and the upper end of the support base is fixedly connected to the inside of the groove by screws. The mounting hole is located on the inner side of the upper end of the support base.

[0013] Further improvements include an upper support plate and a base fixedly connected to the lower end of the support plate. The upper end of the support plate is fixedly connected to the inside of the groove by screws, and the mounting hole is located inside the upper end of the support plate.

[0014] Further improvements include the addition of a protective cover that is fixedly connected to the outside of the frame on the outside of the blade.

[0015] The beneficial effects of this invention are as follows: By setting an anti-winding coil in the assembly gap, the anti-winding coil fills the assembly gap, preventing the fine thread from being brought into the gap when the disc cutter rotates, thus ensuring the normal rotation of the disc cutter. The clip on the anti-winding coil is fixed in the positioning hole by the compressed elastic force, thereby fixing the anti-winding coil in a position concentric with the mounting hole and the blade assembly part. This reduces the assembly gap and prevents the fine thread from entering the assembly gap during the rotation of the blade, thus extending the service life of the cutting cutter. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 A structural schematic diagram of the frame and blade assembly section; Figure 4 for Figure 3 Enlarged view of section A; Figure 5 A schematic diagram of the structure for preventing coil tangling.

[0017] Explanation of reference numerals in the attached figures: 1. Frame, 2. Drive motor, 3. Mounting hole, 4. Blade assembly, 5. Assembly gap, 6. Blade, 7. Anti-winding coil, 8. Positioning hole, 9. Connecting groove, 10. Clamp, 11. Connecting part, 12. Break, 13. Protrusion, 14. Boss, 15. Fixing hole, 16. Fixing cover, 17. Countersunk screw hole, 18. Channel hole, 19. Threaded hole, 20. Groove, 21. Protective cover, 1-1. Motor mounting base, 1-2. Support base, 1-21. Support plate, 1-22. Base. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: See attached document Figure 1 and 2 This embodiment of an anti-thread tangling electric cutting shear includes a frame 1. A drive motor 2 is mounted on one side of the frame 1, and a mounting hole 3 is opened on the other side of the frame 1. The rotating shaft of the drive motor 2 passes through the frame 1 and is provided with a blade assembly part 4 located in the mounting hole 3. An assembly gap 5 is provided between the blade assembly part 4 and the mounting hole 3. A blade 6 is fixedly connected to the side of the blade assembly part 4 away from the frame 1. An anti-tangling coil 7 is placed in the assembly gap 5. The anti-tangling coil 7 fills the assembly gap 5 and is connected to the frame 1. By setting the anti-tangling coil in the assembly gap, the anti-tangling coil fills the assembly gap, preventing the fine thread from being brought into the gap when the disc cutter rotates, thereby ensuring the normal rotation of the disc cutter.

[0019] like Figure 3-5 As shown, the frame 1 has a positioning hole 8 located outside the mounting hole 3. The positioning hole 8 has a connecting groove 9 for connecting the mounting hole 3 on the side near the mounting hole 3. The positioning hole 8 has a clamping head 10 that is squeezed and clamped in the positioning hole 8. A connecting part 11 located in the connecting groove 9 and connected to the anti-winding coil 7 is fixedly connected to one side of the clamping head 10.

[0020] like Figure 5 As shown, the clamp 10 has a ring structure to prevent the stress from being transferred to the anti-winding coil through multiple connecting parts after the clamp is compressed and shrunk. This would cause the anti-winding coil to deform under multiple stresses, making it impossible to ensure the concentric setting of the anti-winding coil with the mounting hole and the blade assembly. As a result, the anti-winding coil will be in continuous contact with the rotating blade assembly during use, causing friction damage to the anti-winding coil, resulting in a poorer anti-winding effect and an increased load on the drive motor.

[0021] like Figure 5 As shown, the anti-winding coil 7 and the clamp 10 are connected by a single connecting part 11 to prevent the clamp from transferring stress to the anti-winding coil through multiple connecting parts after compression and shrinkage. This would prevent the anti-winding coil from deforming under multiple stresses, thus making it impossible to guarantee the concentric setting of the anti-winding coil with the mounting hole and the blade assembly part.

[0022] like Figure 2 As shown, the inner diameter of the anti-winding coil 7 is larger than the outer diameter of the blade assembly 4. The anti-winding coil 7 and the blade assembly 4 are clearance-fitted to avoid mutual friction. Since the blade assembly needs to rotate simultaneously with the blade, the inner diameter of the anti-winding coil is set to be larger than the outer diameter of the blade assembly, thereby eliminating the dimensional error of the outer diameter of the blade assembly during production and ensuring that the blade assembly will not contact the anti-winding coil when rotating. The outer diameter of the anti-winding coil 7 is smaller than the diameter of the mounting hole 3. A gap is left between the anti-winding coil 7 and the mounting hole 3 to avoid the mounting hole 3 from squeezing and deforming the anti-winding coil 7. When the thin thread is wound, it will only be wound between two objects in a relatively rotating state. The anti-winding coil is stationary relative to the mounting hole. Therefore, the gap between the outer diameter of the anti-winding coil and the mounting hole can be set relatively large, and the outer diameter of the anti-winding coil can be relatively small to avoid the mounting hole with poor dimensional accuracy squeezing the anti-winding coil, which would cause deformation of the anti-winding coil and result in continuous friction between the anti-winding coil and the blade assembly, thereby damaging the anti-winding coil and greatly reducing the anti-winding effect.

[0023] like Figure 2 As shown, the blade assembly part 4 has a boss 14 on the side away from the frame 1. A fixing hole 15 is located outside the boss 14 at the center of the inner side of the blade 6. A fixing cover 16 for pressing the blade 6 is threaded to the end of the boss 14. The fixing cover 16 has several countersunk screw holes 17. The blade 6 has channel holes 18 corresponding to the countersunk screw holes 17. The blade assembly part 4 has threaded holes 19 corresponding to the channel holes 18. A fixing screw passing through the channel hole 18 and threaded into the threaded hole 19 is provided in the countersunk screw hole 17. The frame 1 includes an upper end for mounting a drive motor 2. The motor mounting base 1-1 and the lower support base 1-2 are provided. The motor mounting base 1-1 has a groove 20 on the side away from the drive motor 2. The upper end of the support base 1-2 is fixedly connected to the inside of the groove 20 by screws. The mounting hole 3 is located on the inner side of the upper end of the support base 1-2. The support base 1-2 includes an upper support plate 1-21 and a base 1-22 fixedly connected to the lower end of the support plate 1-21. The upper end of the support plate 1-21 is fixedly connected to the inside of the groove 20 by screws. The mounting hole 3 is located on the inner side of the upper end of the support plate 1-21. The outer side of the blade 6 is provided with a protective cover 21 fixedly connected to the outer side of the frame.

[0024] During installation, the support base 1-2 is first fixedly connected to the groove 20 of the motor mounting base 1-1 with screws, so that the rotating shaft of the drive motor 2 on the motor mounting base 1-1 is located in the mounting hole 3. Then, the blade assembly part 4 is fixedly connected to the outside of the rotating shaft of the drive motor 2. The blade 6 is placed on the outside of the boss 14 of the blade assembly part, and the fixing cover 16 is threadedly connected to the outside of the boss 14, so that the boss 14 presses the blade 6. Then, the fixing screw is passed through the countersunk screw hole 17 and the channel hole 18 in sequence and threaded into the threaded hole 19 on the outside of the blade assembly part 4, thereby completely fixing the blade to the blade assembly part 4.

[0025] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art will understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An electric wire cutter for preventing wire tangling, comprising a frame (1), a drive motor (2) mounted on one side of the frame (1), and a mounting hole (3) on the other side of the frame (1), wherein the rotating shaft of the drive motor (2) passes through the frame (1) and is provided with a blade assembly part (4) located in the mounting hole (3), a blade (6) is fixedly connected to the side of the blade assembly part (4) away from the frame (1), and an assembly gap (5) is provided between the blade assembly part (4) and the mounting hole (3), characterized in that: An anti-winding coil (7) is placed in the assembly gap (5), and the anti-winding coil (7) fills the assembly gap (5) and is connected to the frame (1); The frame (1) has a positioning hole (8) located outside the mounting hole (3). The positioning hole (8) has a connecting groove (9) for connecting the mounting hole (3) on the side close to the mounting hole (3). The positioning hole (8) has a clamping head (10) inside the positioning hole (8). The clamping head (10) is fixedly connected to a connecting part (11) located in the connecting groove (9) and connected to the anti-winding coil (7). The card head (10) has a ring structure. The card head (10) has a break (12) inside to facilitate the card head (10) to be pressed inward. The card head (10) has several protrusions (13) around its perimeter that contact the positioning hole (8). The anti-tangle coil (7) and the clip (10) are connected by a single connector (11).

2. The electric wire cutter for preventing wire tangling according to claim 1, characterized in that: The anti-winding coil (7) is positioned on the side away from the drive motor (2) and is lower than the blade assembly (4).

3. The electric wire cutter for preventing wire tangling according to claim 1, characterized in that: The inner diameter of the anti-winding coil (7) is larger than the outer diameter of the blade assembly (4). The anti-winding coil (7) and the blade assembly (4) are in clearance fit to avoid mutual friction.

4. The electric wire cutter for preventing wire tangling according to claim 1, characterized in that: The outer diameter of the anti-winding coil (7) is smaller than the diameter of the mounting hole (3). A gap is left between the anti-winding coil (7) and the mounting hole (3) to avoid the mounting hole (3) from squeezing and deforming the anti-winding coil (7).

5. The electric wire cutter for preventing wire tangling according to claim 1, characterized in that: The blade assembly part (4) has a boss (14) on the side away from the frame (1). The blade (6) has a fixing hole (15) located outside the boss (14) at the center of its inner side. The end of the boss (14) is threaded with a fixing cover (16) for pressing the blade (6). The fixing cover (16) has several countersunk screw holes (17). The blade (6) has a channel hole (18) corresponding to the countersunk screw hole (17). The blade assembly part (4) has a threaded hole (19) corresponding to the channel hole (18). The countersunk screw hole (17) has a fixing screw that passes through the channel hole (18) and is threaded into the threaded hole (19).

6. The electric wire cutter for preventing wire tangling according to claim 1, characterized in that: The frame (1) includes a motor mounting base (1-1) at the upper end for mounting the drive motor (2) and a support base (1-2) at the lower end. The motor mounting base (1-1) has a groove (20) on the side away from the drive motor (2). The upper end of the support base (1-2) is fixedly connected to the inside of the groove (20) by screws. The mounting hole (3) is located inside the upper end of the support base (1-2).

7. The electric wire cutter for preventing wire tangling according to claim 6, characterized in that: The support base (1-2) includes an upper support plate (1-21) and a base (1-22) fixedly connected to the lower end of the support plate (1-21). The upper end of the support plate (1-21) is fixedly connected to the inside of the groove (20) by screws. The mounting hole (3) is located inside the upper end of the support plate (1-21).

Images