Handheld electric cutter

Abstract

The invention discloses a handheld electric shearing device which comprises a handheld shell and a shearing assembly, and a motor is arranged in the handheld shell; the shearing assembly comprises a fixed blade and a rotary blade which are staggered inside and outside; the upper end of the fixed blade is provided with a transverse blade edge, the periphery of the rotary blade is provided with an annular blade edge, and the rotary blade is arranged above the fixed blade; the transverse blade edge and the annular blade edge part at the lower end of the rotary blade are close front and back to form a shearing interface; the motor drives the rotating blade to rotate, so that the annular blade edge and the transverse blade edge generate relative shearing motion, compared with the traditional design that two blades swing to open and close, the structure is simpler, and the reliability of the whole shearing structure is further ensured due to the stable rotating track.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting tools, in particular to a handheld electric shear. Background Art

[0002] With the development of science and technology, electric scissors have been widely used in agriculture, industry and daily life. Traditional electric scissors usually achieve the shearing function by swinging two hinged blades. However, electric scissors in the prior art generally have the problem of complex structure, high driving requirements for the two blades, and easy bite obstacles, which affect the shearing efficiency and safety.

[0003] The following are several prior art electric scissor patents, which solve some of the problems to a certain extent, but still have the above-mentioned shortcomings:

[0004] Patent CN222366674U discloses an electric scissors, including a housing, a switch trigger, a spring, a movement and a moving blade. Its innovation lies in the addition of a locking twist structure, which forms a double protection mechanism through the mechanical limit of the locking twist and the switch wrench, effectively preventing safety accidents caused by misoperation. However, the patent still relies on the traditional single blade swing structure, which has high requirements on the driving accuracy of the blade and is prone to bite obstacles.

[0005] Patent CN222499789U discloses an electric scissors for cutting clothing, which is characterized by the wavy sawtooth design of the fixed blade and the movable blade, and the provision of a refueling bag. The wavy sawtooth can increase the stability and precision of cutting, and the refueling bag solves the problem of adding lubricating oil. However, the blade driving method of this patent is still based on the traditional swing structure, which has high requirements on the driving accuracy and synchronization of the blade, and is prone to bite obstacles.

[0006] CN222515653U patent discloses an electric scissors, including a first housing composed of an upper retaining frame housing and a lower retaining frame housing, and a second housing. The first movable blade and the second movable blade are opened or closed by a first drive assembly, and the second drive assembly provides power to the first drive assembly. The design improves the driving stability through multi-stage gear transmission, but its core shearing principle is still based on the relative swing of the two blades, and there are potential problems of complex driving and bite obstacles.

[0007] Although the above patents have made improvements in safety, stability and ease of operation, the electric scissors in the prior art generally use the swing of two hinged blades to achieve the shearing function. Not only is the structure itself complex, but also a complex transmission mechanism is required to drive the swing of the two blades, which further increases the complexity and manufacturing cost of the equipment. In addition, the synchronization requirements of the two blades are extremely high. Once deviation occurs, it is easy to cause bite obstacles and affect the shearing efficiency. It can be seen that the complex drive structure and high precision requirements make the equipment prone to failure during long-term use, reducing its service life. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a handheld electric shear with a simplified structure and better stability.

[0009] The technical solution adopted by the present invention to solve the above technical problems is: a handheld electric shear comprises a handheld shell and a shearing assembly, wherein a motor is arranged in the handheld shell; the shearing assembly comprises a fixed blade and a rotating blade which are arranged in an inner and outer staggered manner; a transverse blade edge is arranged at the upper end of the fixed blade, an annular blade edge is arranged at the outer periphery of the rotating blade, and the rotating blade is arranged above the fixed blade; the transverse blade edge and the annular blade edge part at the lower end of the rotating blade are close to each other front and back to form a shearing interface; the motor drives the rotating blade to rotate, so that the annular blade edge and the transverse blade edge produce relative shearing movement.

[0010] The preferred technical solution adopted by the present invention to solve the above technical problem is: a lateral extension portion is provided at the front end of the handheld housing, and the shearing assembly is arranged at a lateral position of the lateral extension portion.

[0011] The preferred technical solution adopted by the present invention to solve the above technical problem is: the rotating blade has a polygonal structure, the annular blade edge is composed of multiple sections of continuous straight blade edges, and the angle α between adjacent straight blade edges satisfies: 120°<α<180°.

[0012] The preferred technical solution adopted by the present invention to solve the above technical problems is: it also includes a lower supporting member, the fixed blade is fixed on the lower supporting member, the front end of the lower supporting member is provided with a guiding inclined surface inclined forward and downward, and the end of the guiding inclined surface extends to the outside of the rotating track of the rotating blade.

[0013] The preferred technical solution adopted by the present invention to solve the above technical problems is: the lower support member includes a vertical wall and a bent wall, and the bent wall is bent from the bottom of the vertical wall in a direction away from the rotating blade to form a material support structure with a pushing surface.

[0014] The preferred technical solution adopted by the present invention to solve the above technical problems is: an arc-shaped protective cover is provided at the front end of the handheld shell, and the protective edge of the arc-shaped protective cover is located outside the annular blade edge of the rotating blade and maintains a distance from the annular blade edge of the rotating blade.

[0015] The preferred technical solution adopted by the present invention to solve the above technical problem is: the close distance d between the transverse knife edge and the annular knife edge satisfies: 0.05mm≤d≤0.3mm.

[0016] The preferred technical solution adopted by the present invention to solve the above technical problem is: the front end surface of the handheld housing is an arc transition surface, and the lighting module is integrated on the arc transition surface.

[0017] The preferred technical solution adopted by the present invention to solve the above technical problems is: a handheld electric shear comprises a handheld housing and a shearing assembly, wherein a motor is arranged in the handheld housing;

[0018] The front end of the handheld housing is provided with a lateral extension portion, and the shearing assembly is arranged at the lateral position of the lateral extension portion; the shearing assembly includes a fixed blade and a rotating blade which are arranged in an inner and outer staggered manner; the upper end of the fixed blade is provided with a transverse blade edge, the outer periphery of the rotating blade is provided with an annular blade edge, and the rotating blade is arranged above the fixed blade;

[0019] The rotating blade has a polygonal structure, and the annular blade edge is composed of multiple continuous straight blade edges, and the angle α between adjacent straight blade edges satisfies: 120°<α<180°;

[0020] The transverse blade edge and the annular blade edge portion at the lower end of the rotating blade are close to each other to form a shearing interface;

[0021] The motor drives the rotary blade to rotate, so that the annular blade edge and the transverse blade edge produce relative shearing motion.

[0022] The preferred technical solution adopted by the present invention to solve the above technical problem is: it also includes a lower supporting member and an arc-shaped protective cover, and the lower supporting member and the arc-shaped protective cover surround the fixed blade and the rotating blade;

[0023] The lower support member includes a vertical wall and a bent wall, the fixed blade is fixed on the vertical wall, a guide slope inclined forward and downward is provided at the front end of the vertical wall, and the end of the guide slope extends to the outside of the rotation track of the rotating blade;

[0024] The bending wall bends from the bottom of the vertical wall in a direction away from the rotating blade to form a material supporting structure with a pushing surface;

[0025] The arc-shaped protective cover is located above the rotating blade, and the protective edge of the arc-shaped protective cover is located outside the annular blade edge of the rotating blade.

[0026] Compared with the prior art, the advantages of the present invention are: the motor drives the rotary blade to rotate, so that the annular blade edge and the transverse blade edge produce relative shearing movement to achieve shearing of the sheared object. Compared with the traditional design of two blades swinging and opening, the structure is simpler, and because the rotation trajectory is stable, the reliability of the entire shearing structure is further ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0028] Figure 1 The three-dimensional structure of the handheld electric shears Figure 1 ;

[0029] Figure 2 The three-dimensional structure of the handheld electric shears Figure 2 ;

[0030] Figure 3 Disassembly of a handheld electric shear Figure 1 ;

[0031] Figure 4 Disassembly of a handheld electric shear Figure 2 . DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0033] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it will not be further defined or explained in the subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the invention product is usually placed when in use, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. "First" and "second" are only for the purpose of making the description easier to understand, without any other directional meaning, and cannot be used as a limitation on the present invention.

[0035] like Figure 1-4 As shown, the present embodiment provides a handheld electric shear, which includes a handheld housing 1 and a shearing assembly, wherein the handheld housing 1 is provided with a motor 2. The shearing assembly includes a fixed blade 4 and a rotating blade 5 which are staggered inside and outside. A transverse blade edge 41 is provided at the upper end of the fixed blade 4, and an annular blade edge 51 is provided at the outer periphery of the rotating blade 5, and the rotating blade 5 is arranged above the fixed blade 4. The transverse blade edge 41 and the annular blade edge 51 at the lower end of the rotating blade 5 are close to each other to form a shearing interface. The motor 2 drives the rotating blade 5 to rotate, so that the annular blade edge 51 and the transverse blade edge 41 produce relative shearing motion to achieve shearing of the sheared object. Compared with the traditional design of two blades swinging and opening and closing, the structure of the present embodiment is simple and easier to achieve through an ordinary transmission structure. And because the rotation trajectory is stable, the reliability of the entire shearing structure is further ensured.

[0036] Preferably, if Figure 1-4 As shown, the handheld shell 1 extends in length direction, and a side extension portion 11 is provided at the front end of the handheld shell 1. The shearing assembly is arranged at the lateral position of the side extension portion 11, so that the operator can more easily observe the specific state of the shearing area during operation, and at the same time, the operator's hands are kept away from the shearing area, reducing the risk of accidental injury.

[0037] More preferably, if Figure 1 As shown, an operating button 9 for controlling the motor 2 is provided on the handheld housing 1 , and the operating button 9 is located on one side of the side extension portion 11 to adapt to ergonomics.

[0038] Preferably, the inner and outer spacing between the transverse blade edge 41 and the annular blade edge 51 at the lower end of the rotating blade 5 is 0.05 to 0.3 mm. This spacing range ensures a close fit between the blades during the shearing process, ensures shearing, avoids pulling or residue, and avoids material jamming, while reducing blade wear and extending service life.

[0039] like Figure 2-3As shown, the rotating blade 5 is a polygonal structure, and the annular blade edge 51 is composed of multiple continuous straight blade edges g, and the angle α between adjacent straight blade edges g satisfies: 120°<α<180°. The engagement between the straight blade edge g and the transverse blade edge 41 simulates the most common scissors structure in life. At the same time, the blade surfaces of the annular blade edge 51 and the transverse blade edge 41 are opposite to each other, simulating the common flat-blade scissors in life, and the shearing effect is more accurate, which can meet the shearing requirements of various materials. The angle design of the straight blade edge g ensures the shearing force.

[0040] Further preferably, the rotating blade 5 is a regular polygonal structure, and in this embodiment is a regular decagonal structure, so that the rotating blade 5 can distribute the shearing force more evenly during the shearing process, improve the shearing efficiency, and reduce the problem of incomplete shearing caused by the irregular shape of the blade.

[0041] like Figure 1-4 As shown, the handheld electric shear includes a lower support 6, which includes a vertical wall 61 and a bending wall 62. The fixed blade 4 is fixed on the vertical wall 61. The bending wall 62 bends from the bottom of the vertical wall 61 in a direction away from the rotating blade 5 to form a material support structure with a pushing surface, which provides continuous support force for the material during the cutting operation, facilitates the cutting operation, makes the operation more labor-saving, and prevents the material from shifting, which is conducive to maintaining the stability of the cutting trajectory. The fixed blade 4 is arranged on the inner side of the vertical wall 61, and the vertical wall 61 at the corresponding position of the fixed blade 4 is provided with a notch 63. The lower end of the rotating blade 5 is located in the notch 63. The vertical wall 61 provides a mounting seat for the fixed blade 4 and also protects the rotating blade 5 to prevent external collision from damaging the blade.

[0042] like Figure 2-3 As shown, the front end of the vertical wall 61 is provided with a guiding slope 64 inclined forward and downward, and the end of the guiding slope 64 extends to the outside of the rotation track of the rotating blade 5 to guide the cut material into the cutting area between the fixed blade 4 and the rotating blade 5, thereby improving the convenience and accuracy of cutting.

[0043] Preferably, the fixed blade 4 is detachably connected to the vertical wall 61, so as to facilitate disassembly and replacement. Preferably, a mounting wall is provided at the corresponding position of the notch 63, and a groove matching the fixed blade is provided on the mounting wall, and the fixed blade 4 is fixed in the groove by a fastener, and the transverse blade edge exceeds the upper edge of the mounting wall.

[0044] Preferably, a rotating shaft connected to the rotating blade 5 extends out of the handheld housing 1, and the rotating blade 5 is detachably clamped on the rotating shaft, so as to facilitate disassembly, assembly and replacement.

[0045] like Figure 3-4As shown, the end face of the side extension portion 11 is a vertical face 111, and the rear side of the vertical wall 61 extends upwardly to form a connecting wall 65, which is used to connect the handheld housing 1. The connecting wall 65 is bent and extends upward, and the edge is spaced a certain distance from the annular blade edge 51 of the rotating blade 5. The upper section of the connecting wall 65 is provided with an inwardly bent connecting ear k, which is snap-fitted with the handheld housing 1, and the connecting wall 65 is tightly connected to the side wall of the handheld housing 1. This double-reinforced connection method suppresses shear vibration, prevents the lower support 6 from falling, and improves operational safety.

[0046] like Figure 1-4 As shown, a curved protective cover 7 is provided at the front end of the handheld housing 1, and the protective edge of the curved protective cover 7 is located outside the annular blade edge 51 of the rotating blade 5 and keeps a distance from the annular blade edge 51 of the rotating blade 5. The curved protective cover 7 covers the rotating area of ​​the blade to avoid the risk of hand injury during the shearing process and the safety hazard of other materials being involved in the shearing area, and can also avoid the splashing of impurities caused by shearing. Preferably, the curved protective cover 7 is snap-connected to the handheld housing 1, so as to facilitate disassembly and assembly, which is conducive to the maintenance of the blade.

[0047] like Figure 1 , 3 As shown, the front end surface of the handheld housing 1 is a circular arc transition surface 102, and the lighting module 10 is integrated on the circular arc transition surface 102. Preferably, the optical axis of the lighting module 10 forms a depression angle of 10°-30° with the shear interface, providing a good lighting effect, improving the visibility of the operation, improving the alignment accuracy of the edge of the fabric, and facilitating the user to operate in an environment with insufficient light.

[0048] like Figure 4 As shown, the motor 2 is arranged in the handheld housing 1 along the front-to-back direction, and a battery compartment extending in the front-to-back direction is arranged at the rear side of the handheld housing 1. The battery compartment is used to install a battery 3 for providing power support, and the output shaft of the motor 2 is connected to the rotating shaft of the rotating blade 5 through the gear transmission assembly 8 to drive the rotating blade 5 to rotate. This design optimizes the center of gravity distribution, reduces fatigue from long-term operation, and has a compact structure, making the entire handheld electric shear small in size and easy to carry and use.

[0049] The handheld electric shears provided by the present invention are introduced. The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. Handheld electric shears, characterized by: It comprises a handheld housing and a shearing assembly, wherein a motor is arranged in the handheld housing; The shearing assembly comprises a fixed blade and a rotating blade which are staggered inside and outside; a transverse blade edge is arranged on the upper end of the fixed blade, an annular blade edge is arranged on the outer periphery of the rotating blade, and the rotating blade is arranged above the fixed blade; The transverse blade edge and the annular blade edge portion at the lower end of the rotating blade are close to each other to form a shearing interface; The motor drives the rotary blade to rotate, so that the annular blade edge and the transverse blade edge produce relative shearing motion.

2. The handheld electric shear according to claim 1, characterized in that: A lateral extension portion is provided at the front end of the handheld housing, and the shearing assembly is arranged at a lateral position of the lateral extension portion.

3. The handheld electric shear according to claim 1, characterized in that: The rotating blade has a polygonal structure, and the annular blade edge is composed of a plurality of continuous straight blade edges, and the angle α between adjacent straight blade edges satisfies: 120°<α<180°.

4. The handheld electric shear according to claim 1, characterized in that: It also includes a lower supporting member, the fixed blade is fixed on the lower supporting member, the front end of the lower supporting member is provided with a guiding inclined surface inclined forward and downward, and the end of the guiding inclined surface extends to the outside of the rotating track of the rotating blade.

5. The handheld electric shear according to claim 1, characterized in that: The lower supporting member comprises a vertical wall and a bent wall, wherein the bent wall is bent from the bottom of the vertical wall in a direction away from the rotating blade to form a material supporting structure with a pushing surface.

6. The handheld electric shear according to claim 1, characterized in that: An arc-shaped protective cover is arranged at the front end of the handheld housing, and a protective edge of the arc-shaped protective cover is located outside the annular blade edge of the rotating blade and keeps a distance from the annular blade edge of the rotating blade.

7. The handheld electric shear according to claim 1, characterized in that: The close distance d between the transverse blade edge and the annular blade edge satisfies: 0.05mm≤d≤0.3mm.

8. The handheld electric shear according to claim 1, characterized in that: The front end surface of the handheld housing is an arc transition surface, and a lighting module is integrated on the arc transition surface.

9. Handheld electric shears, characterized in that: It comprises a handheld housing and a shearing assembly, wherein a motor is arranged in the handheld housing; The front end of the handheld housing is provided with a lateral extension portion, and the shearing assembly is arranged at the lateral position of the lateral extension portion; the shearing assembly includes a fixed blade and a rotating blade which are arranged in an inner and outer staggered manner; the upper end of the fixed blade is provided with a transverse blade edge, the outer periphery of the rotating blade is provided with an annular blade edge, and the rotating blade is arranged above the fixed blade; The rotating blade has a polygonal structure, and the annular blade edge is composed of multiple continuous straight blade edges, and the angle α between adjacent straight blade edges satisfies: 120°<α<180°; The transverse blade edge and the annular blade edge portion at the lower end of the rotating blade are close to each other to form a shearing interface; The motor drives the rotary blade to rotate, so that the annular blade edge and the transverse blade edge produce relative shearing motion.

10. The handheld electric shear according to claim 1, characterized in that: It also includes a lower supporting member and an arc-shaped protective cover, wherein the lower supporting member and the arc-shaped protective cover surround the fixed blade and the rotating blade; The lower support member includes a vertical wall and a bent wall, the fixed blade is fixed on the vertical wall, a guide slope inclined forward and downward is provided at the front end of the vertical wall, and the end of the guide slope extends to the outside of the rotation track of the rotating blade; The bending wall bends from the bottom of the vertical wall in a direction away from the rotating blade to form a material supporting structure with a pushing surface; The arc-shaped protective cover is located above the rotating blade, and the protective edge of the arc-shaped protective cover is located outside the annular blade edge of the rotating blade.

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